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NEX-17697 update tzdata to 2018e
Reviewed by: Dan Fields <dan.fields@nexenta.com>
Reviewed by: Roman Strashkin <roman.strashkin@nexenta.com>
8968 update tzdata to 2018a
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>
Approved by: Richard Lowe <richlowe@richlowe.net>
NEX-15458 update zoneinfo to 2017c
Reviewed by: Roman Strashkin <roman.strashkin@nexenta.com>
NEX-15458 update zoneinfo to 2017c
Reviewed by: Roman Strashkin <roman.strashkin@nexenta.com>
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--- old/usr/src/data/zoneinfo/northamerica
+++ new/usr/src/data/zoneinfo/northamerica
1 1 # This file is in the public domain, so clarified as of
2 2 # 2009-05-17 by Arthur David Olson.
3 3
4 4 # also includes Central America and the Caribbean
5 5
6 6 # This file is by no means authoritative; if you think you know better,
7 7 # go ahead and edit the file (and please send any changes to
8 8 # tz@iana.org for general use in the future). For more, please see
9 9 # the file CONTRIBUTING in the tz distribution.
10 10
11 11 # From Paul Eggert (1999-03-22):
12 12 # A reliable and entertaining source about time zones is
13 13 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
14 14
15 15 ###############################################################################
16 16
17 17 # United States
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18 18
19 19 # From Paul Eggert (1999-03-31):
20 20 # Howse writes (pp 121-125) that time zones were invented by
21 21 # Professor Charles Ferdinand Dowd (1825-1904),
22 22 # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
23 23 # His pamphlet "A System of National Time for Railroads" (1870)
24 24 # was the result of his proposals at the Convention of Railroad Trunk Lines
25 25 # in New York City (1869-10). His 1870 proposal was based on Washington, DC,
26 26 # but in 1872-05 he moved the proposed origin to Greenwich.
27 27
28 -# From Paul Eggert (2016-09-21):
28 +# From Paul Eggert (2018-03-20):
29 29 # Dowd's proposal left many details unresolved, such as where to draw
30 30 # lines between time zones. The key individual who made time zones
31 31 # work in the US was William Frederick Allen - railway engineer,
32 32 # managing editor of the Travelers' Guide, and secretary of the
33 33 # General Time Convention, a railway standardization group. Allen
34 34 # spent months in dialogs with scientific and railway leaders,
35 35 # developed a workable plan to institute time zones, and presented it
36 36 # to the General Time Convention on 1883-04-11, saying that his plan
37 37 # meant "local time would be practically abolished" - a plus for
38 38 # railway scheduling. By the next convention on 1883-10-11 nearly all
39 -# railroads had agreed and it took effect on 1883-11-18 at 12:00.
40 -# That Sunday was called the "day of two noons", as the eastern parts
41 -# of the new zones observed noon twice. Allen witnessed the
42 -# transition in New York City, writing:
39 +# railroads had agreed and it took effect on 1883-11-18. That Sunday
40 +# was called the "day of two noons", as some locations observed noon
41 +# twice. Allen witnessed the transition in New York City, writing:
43 42 #
44 43 # I heard the bells of St. Paul's strike on the old time. Four
45 44 # minutes later, obedient to the electrical signal from the Naval
46 45 # Observatory ... the time-ball made its rapid descent, the chimes
47 46 # of old Trinity rang twelve measured strokes, and local time was
48 47 # abandoned, probably forever.
49 48 #
50 49 # Most of the US soon followed suit. See:
51 50 # Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56.
52 51 # http://dx.doi.org/10.2307/3105430
53 52
54 53 # From Paul Eggert (2005-04-16):
55 54 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
56 55 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
57 56
58 57 # From Paul Eggert (2006-03-22):
59 58 # A good source for time zone historical data in the US is
60 59 # Thomas G. Shanks, The American Atlas (5th edition),
61 60 # San Diego: ACS Publications, Inc. (1991).
62 61 # Make sure you have the errata sheet; the book is somewhat useless without it.
63 62 # It is the source for most of the pre-1991 US entries below.
64 63
65 64 # From Paul Eggert (2001-03-06):
66 65 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin
67 66 # in his whimsical essay "An Economical Project for Diminishing the Cost
68 67 # of Light" published in the Journal de Paris (1784-04-26).
69 68 # Not everyone is happy with the results:
70 69 #
71 70 # I don't really care how time is reckoned so long as there is some
72 71 # agreement about it, but I object to being told that I am saving
73 72 # daylight when my reason tells me that I am doing nothing of the kind.
74 73 # I even object to the implication that I am wasting something
75 74 # valuable if I stay in bed after the sun has risen. As an admirer
76 75 # of moonlight I resent the bossy insistence of those who want to
77 76 # reduce my time for enjoying it. At the back of the Daylight Saving
78 77 # scheme I detect the bony, blue-fingered hand of Puritanism, eager
79 78 # to push people into bed earlier, and get them up earlier, to make
80 79 # them healthy, wealthy and wise in spite of themselves.
81 80 #
82 81 # -- Robertson Davies, The diary of Samuel Marchbanks,
83 82 # Clarke, Irwin (1947), XIX, Sunday
84 83 #
85 84 # For more about the first ten years of DST in the United States, see
86 85 # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint
87 86 # (Carnegie Library of Pittsburgh, 1927).
88 87 # http://www.clpgh.org/exhibit/dst.html
89 88 #
90 89 # Shanks says that DST was called "War Time" in the US in 1918 and 1919.
91 90 # However, DST was imposed by the Standard Time Act of 1918, which
92 91 # was the first nationwide legal time standard, and apparently
93 92 # time was just called "Standard Time" or "Daylight Saving Time".
94 93
95 94 # From Arthur David Olson:
96 95 # US Daylight Saving Time ended on the last Sunday of *October* in 1974.
97 96 # See, for example, the front page of the Saturday, 1974-10-26
98 97 # and Sunday, 1974-10-27 editions of the Washington Post.
99 98
100 99 # From Arthur David Olson:
101 100 # Before the Uniform Time Act of 1966 took effect in 1967, observance of
102 101 # Daylight Saving Time in the US was by local option, except during wartime.
103 102
104 103 # From Arthur David Olson (2000-09-25):
105 104 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
106 105 # In the introduction, Oboler spoke of "Eastern Peace Time."
107 106 # An AltaVista search turned up:
108 107 # https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html
109 108 # "When the time is announced over the radio now, it is 'Eastern Peace
110 109 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
111 110 # (August 1945) by way of confirmation.
112 111 #
113 112 # From Paul Eggert (2017-09-23):
114 113 # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter.
115 114
116 115 # From Joseph Gallant citing
117 116 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
118 117 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
119 118 # to switch to London for Attlee's address, but the American people
120 119 # never got to hear his speech live. According to one press account,
121 120 # CBS' Bob Trout was first to announce the word of Japan's surrender,
122 121 # but a few seconds later, NBC, ABC and Mutual also flashed the word
123 122 # of surrender, all of whom interrupting the bells of Big Ben in
124 123 # London which were to precede Mr. Attlee's speech.
125 124
126 125 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From
127 126 # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
128 127 #
129 128 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
130 129 # Any announcement from Asia would reach St. John's New York newsroom on a
131 130 # wire service teletype machine, which had prescribed signals for major news.
132 131 # Associated Press, for example, would ring five bells before spewing out
133 132 # typed copy of an important story, and 10 bells for news "of transcendental
134 133 # importance."
135 134 #
136 135 # On Aug. 14, stalling while talking steadily into the NBC networks' open
137 136 # microphone, St. John heard five bells and waited only to hear a sixth bell,
138 137 # before announcing confidently: "Ladies and gentlemen, World War II is over.
139 138 # The Japanese have agreed to our surrender terms."
140 139 #
141 140 # He had scored a 20-second scoop on other broadcasters.
142 141
143 142 # From Arthur David Olson (2005-08-22):
144 143 # Paul has been careful to use the "US" rules only in those locations
145 144 # that are part of the United States; this reflects the real scope of
146 145 # U.S. government action. So even though the "US" rules have changed
147 146 # in the latest release, other countries won't be affected.
148 147
149 148 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
150 149 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
151 150 Rule US 1918 1919 - Oct lastSun 2:00 0 S
152 151 Rule US 1942 only - Feb 9 2:00 1:00 W # War
153 152 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
154 153 Rule US 1945 only - Sep lastSun 2:00 0 S
155 154 Rule US 1967 2006 - Oct lastSun 2:00 0 S
156 155 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
157 156 Rule US 1974 only - Jan 6 2:00 1:00 D
158 157 Rule US 1975 only - Feb 23 2:00 1:00 D
159 158 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
160 159 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
161 160 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
162 161 Rule US 2007 max - Nov Sun>=1 2:00 0 S
163 162
164 163 # From Arthur David Olson, 2005-12-19
165 164 # We generate the files specified below to guard against old files with
166 165 # obsolete information being left in the time zone binary directory.
167 166 # We limit the list to names that have appeared in previous versions of
168 167 # this time zone package.
169 168 # We do these as separate Zones rather than as Links to avoid problems if
170 169 # a particular place changes whether it observes DST.
171 170 # We put these specifications here in the northamerica file both to
172 171 # increase the chances that they'll actually get compiled and to
173 172 # avoid the need to duplicate the US rules in another file.
174 173
175 174 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
176 175 Zone EST -5:00 - EST
177 176 Zone MST -7:00 - MST
178 177 Zone HST -10:00 - HST
179 178 Zone EST5EDT -5:00 US E%sT
180 179 Zone CST6CDT -6:00 US C%sT
181 180 Zone MST7MDT -7:00 US M%sT
182 181 Zone PST8PDT -8:00 US P%sT
183 182
184 183 # From U. S. Naval Observatory (1989-01-19):
185 184 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
186 185 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
187 186 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
188 187 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
189 188 # USA MOUNTAIN 7 H BEHIND UTC DENVER
190 189 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
191 190 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
192 191 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
193 192 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
194 193 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
195 194 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
196 195 # USA " 9 H BEHIND UTC APR 3 - OCT 30
197 196 # USA HAWAII 10 H BEHIND UTC
198 197 # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY
199 198
200 199 # From Arthur David Olson (1989-01-21):
201 200 # The above dates are for 1988.
202 201 # Note the "AKST" and "AKDT" abbreviations, the claim that there's
203 202 # no DST in Samoa, and the claim that there is DST in Alaska and the
204 203 # Aleutians.
205 204
206 205 # From Arthur David Olson (1988-02-13):
207 206 # Legal standard time zone names, from United States Code (1982 Edition and
208 207 # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names
209 208 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
210 209 # took effect), as explained in sections 263 and 261:
211 210 # (none)
212 211 # United States standard eastern time
213 212 # United States standard mountain time
214 213 # United States standard central time
215 214 # United States standard Pacific time
216 215 # (none)
217 216 # United States standard Alaska time
218 217 # (none)
219 218 # Next, names from 1967-04-01 until 1983-11-30 (the date for
220 219 # public law 98-181):
221 220 # Atlantic standard time
222 221 # eastern standard time
223 222 # central standard time
224 223 # mountain standard time
225 224 # Pacific standard time
226 225 # Yukon standard time
227 226 # Alaska-Hawaii standard time
228 227 # Bering standard time
229 228 # And after 1983-11-30:
230 229 # Atlantic standard time
231 230 # eastern standard time
232 231 # central standard time
233 232 # mountain standard time
234 233 # Pacific standard time
235 234 # Alaska standard time
236 235 # Hawaii-Aleutian standard time
237 236 # Samoa standard time
238 237 # The law doesn't give abbreviations.
239 238 #
240 239 # From Paul Eggert (2016-12-19):
241 240 # Here are URLs for the 1918 and 1966 legislation:
242 241 # http://uscode.house.gov/statviewer.htm?volume=40&page=451
243 242 # http://uscode.house.gov/statviewer.htm?volume=80&page=108
244 243 # Although the 1918 names were officially "United States Standard
245 244 # Eastern Time" and similarly for "Central", "Mountain", "Pacific",
246 245 # and "Alaska", in practice "Standard" was placed just before "Time",
247 246 # as codified in 1966. In practice, Alaska time was abbreviated "AST"
248 247 # before 1968. Summarizing the 1967 name changes:
249 248 # 1918 names 1967 names
250 249 # -08 Standard Pacific Time (PST) Pacific standard time (PST)
251 250 # -09 (unofficial) Yukon (YST) Yukon standard time (YST)
252 251 # -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST)
253 252 # -11 (unofficial) Nome (NST) Bering standard time (BST)
254 253 #
255 254 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
256 255 # Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time"
257 256 # for time in Guam and the Northern Marianas. See the file "australasia".
258 257 #
259 258 # From Paul Eggert (2015-04-17):
260 259 # HST and HDT are standardized abbreviations for Hawaii-Aleutian
261 260 # standard and daylight times. See section 9.47 (p 234) of the
262 261 # U.S. Government Printing Office Style Manual (2008)
263 262 # https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
264 263
265 264 # From Arthur David Olson, 2005-08-09
266 265 # The following was signed into law on 2005-08-08.
267 266 #
268 267 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
269 268 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
270 269 # U.S.C. 260a(a)) is amended--
271 270 # (1) by striking "first Sunday of April" and inserting "second
272 271 # Sunday of March"; and
273 272 # (2) by striking "last Sunday of October" and inserting "first
274 273 # Sunday of November'.
275 274 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the
276 275 # date of enactment of this Act or March 1, 2007, whichever is later.
277 276 # (c) Report to Congress.--Not later than 9 months after the effective
278 277 # date stated in subsection (b), the Secretary shall report to Congress
279 278 # on the impact of this section on energy consumption in the United
280 279 # States.
281 280 # (d) Right to Revert.--Congress retains the right to revert the
282 281 # Daylight Saving Time back to the 2005 time schedules once the
283 282 # Department study is complete.
284 283
285 284 # US eastern time, represented by New York
286 285
287 286 # Connecticut, Delaware, District of Columbia, most of Florida,
288 287 # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
289 288 # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
290 289 # New Hampshire, New Jersey, New York, North Carolina, Ohio,
291 290 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
292 291 # Vermont, Virginia, West Virginia
293 292
294 293 # From Dave Cantor (2004-11-02):
295 294 # Early this summer I had the occasion to visit the Mount Washington
296 295 # Observatory weather station atop (of course!) Mount Washington [, NH]....
297 296 # One of the staff members said that the station was on Eastern Standard Time
298 297 # and didn't change their clocks for Daylight Saving ... so that their
299 298 # reports will always have times which are 5 hours behind UTC.
300 299
301 300 # From Paul Eggert (2005-08-26):
302 301 # According to today's Huntsville Times
303 302 # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1
304 303 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City
305 304 # in Russell County, Lanett in Chambers County and some towns in Lee County,
306 305 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
307 306 # Roberts, city administrator in Phenix City. as saying "We are in the Central
308 307 # time zone, but we do go by the Eastern time zone because so many people work
309 308 # in Columbus."
310 309 #
311 310 # From Paul Eggert (2017-02-22):
312 311 # Four cities are involved. The two not mentioned above are Smiths Station
313 312 # and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started
314 313 # because West Point Pepperell textile mills were in Alabama while the
315 314 # corporate office was in Georgia, and residents voted to keep Eastern
316 315 # time even after the mills closed. See: Kazek K. Did you know which
317 316 # Alabama towns are in a different time zone? al.com 2017-02-06.
318 317 # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html
319 318
320 319 # From Paul Eggert (2014-09-06):
321 320 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
322 321 # says that New York City Hall time was 3 minutes 58.4 seconds fast of
323 322 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the
324 323 # nearest second.
325 324
326 325 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
327 326 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
328 327 Rule NYC 1920 only - Oct lastSun 2:00 0 S
329 328 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
330 329 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
331 330 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
332 331 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
333 332 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58
334 333 -5:00 US E%sT 1920
335 334 -5:00 NYC E%sT 1942
336 335 -5:00 US E%sT 1946
337 336 -5:00 NYC E%sT 1967
338 337 -5:00 US E%sT
339 338
340 339 # US central time, represented by Chicago
341 340
342 341 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
343 342 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
344 343 # Washington counties), Illinois, western Indiana
345 344 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
346 345 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
347 346 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
348 347 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
349 348 # western Tennessee, most of Texas, Wisconsin
350 349
351 350 # From Paul Eggert (2018-01-07):
352 351 # In 1869 the Chicago Astronomical Society contracted with the city to keep
353 352 # time. Though delayed by the Great Fire, by 1880 a wire ran from the
354 353 # Dearborn Observatory (on the University of Chicago campus) to City Hall,
355 354 # which then sent signals to police and fire stations. However, railroads got
356 355 # their time signals from the Allegheny Observatory, the Madison Observatory,
357 356 # the Ann Arbor Observatory, etc., so their clocks did not agree with each
358 357 # other or with the city's official time. The confusion took some years to
359 358 # clear up. See:
360 359 # Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04.
361 360 # http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/
362 361
363 362 # From Larry M. Smith (2006-04-26) re Wisconsin:
364 363 # https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf
365 364 # is currently enforced at the 01:00 time of change. Because the local
366 365 # "bar time" in the state corresponds to 02:00, a number of citations
367 366 # are issued for the "sale of class 'B' alcohol after prohibited
368 367 # hours" within the deviated hour of this change every year....
369 368 #
370 369 # From Douglas R. Bomberg (2007-03-12):
371 370 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
372 371 # Statue 175 closer in synch with the US Congress' intent....
373 372 # https://docs.legis.wisconsin.gov/2007/related/acts/3
374 373
375 374 # From an email administrator of the City of Fort Pierre, SD (2015-12-21):
376 375 # Fort Pierre is technically located in the Mountain time zone as is
377 376 # the rest of Stanley County. Most of Stanley County and Fort Pierre
378 377 # uses the Central time zone due to doing most of their business in
379 378 # Pierre so it simplifies schedules. I have lived in Stanley County
380 379 # all my life and it has been that way since I can remember. (43 years!)
381 380 #
382 381 # From Paul Eggert (2015-12-25):
383 382 # Assume this practice predates 1970, so Fort Pierre can use America/Chicago.
384 383
385 384 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
386 385 Rule Chicago 1920 only - Jun 13 2:00 1:00 D
387 386 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
388 387 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
389 388 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
390 389 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
391 390 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
392 391 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
393 392 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24
394 393 -6:00 US C%sT 1920
395 394 -6:00 Chicago C%sT 1936 Mar 1 2:00
396 395 -5:00 - EST 1936 Nov 15 2:00
397 396 -6:00 Chicago C%sT 1942
398 397 -6:00 US C%sT 1946
399 398 -6:00 Chicago C%sT 1967
400 399 -6:00 US C%sT
401 400 # Oliver County, ND switched from mountain to central time on 1992-10-25.
402 401 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
403 402 -7:00 US M%sT 1992 Oct 25 2:00
404 403 -6:00 US C%sT
405 404 # Morton County, ND, switched from mountain to central time on
406 405 # 2003-10-26, except for the area around Mandan which was already central time.
407 406 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
408 407 # Officially this switch also included part of Sioux County, and
409 408 # Jones, Mellette, and Todd Counties in South Dakota;
410 409 # but in practice these other counties were already observing central time.
411 410 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
412 411 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
413 412 -7:00 US M%sT 2003 Oct 26 2:00
414 413 -6:00 US C%sT
415 414
416 415 # From Josh Findley (2011-01-21):
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417 416 # ...it appears that Mercer County, North Dakota, changed from the
418 417 # mountain time zone to the central time zone at the last transition from
419 418 # daylight-saving to standard time (on Nov. 7, 2010):
420 419 # https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
421 420 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
422 421
423 422 # From Andy Lipscomb (2011-01-24):
424 423 # ...according to the Census Bureau, the largest city is Beulah (although
425 424 # it's commonly referred to as Beulah-Hazen, with Hazen being the next
426 425 # largest city in Mercer County). Google Maps places Beulah's city hall
427 -# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset
428 -# of 6h47'07".
426 +# at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07".
429 427
430 428 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53
431 429 -7:00 US M%sT 2010 Nov 7 2:00
432 430 -6:00 US C%sT
433 431
434 432 # US mountain time, represented by Denver
435 433 #
436 434 # Colorado, far western Kansas, Montana, western
437 435 # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
438 436 # New Mexico, southwestern North Dakota,
439 437 # western South Dakota, far western Texas (El Paso County, Hudspeth County,
440 438 # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
441 439 #
442 440 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
443 441 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
444 442 Rule Denver 1920 only - Oct lastSun 2:00 0 S
445 443 Rule Denver 1921 only - May 22 2:00 0 S
446 444 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
447 445 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
448 446 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
449 447 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04
450 448 -7:00 US M%sT 1920
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451 449 -7:00 Denver M%sT 1942
452 450 -7:00 US M%sT 1946
453 451 -7:00 Denver M%sT 1967
454 452 -7:00 US M%sT
455 453
456 454 # US Pacific time, represented by Los Angeles
457 455 #
458 456 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
459 457 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
460 458 # north of the Salmon River, and the towns of Burgdorf and Warren),
461 -# Nevada (except West Wendover), Oregon (except the northern 3/4 of
459 +# Nevada (except West Wendover), Oregon (except the northern ¾ of
462 460 # Malheur county), and Washington
463 461
464 462 # From Paul Eggert (2016-08-20):
465 463 # In early February 1948, in response to California's electricity shortage,
466 464 # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours,
467 465 # causing electric clocks to lose six minutes per day. (This did not change
468 466 # legal time, and is not part of the data here.) See:
469 467 # Ross SA. An energy crisis from the past: Northern California in 1948.
470 468 # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley,
471 469 # 1973-11. https://escholarship.org/uc/item/8x22k30c
472 470 #
473 471 # In another measure to save electricity, DST was instituted from 1948-03-14
474 472 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move
475 473 # the fallback transition earlier. See pages 3-4 of:
476 474 # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf
477 475 #
478 476 # In response:
479 477 #
480 478 # Governor Warren received a torrent of objecting mail, and it is not too much
481 479 # to speculate that the objections to Daylight Saving Time were one important
482 480 # factor in the defeat of the Dewey-Warren Presidential ticket in California.
483 481 # -- Ross, p 25
484 482 #
485 483 # On December 8 the governor exercised the option, setting the date to January 1
486 484 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01).
487 485 #
488 486 # Despite the controversy, in 1949 California voters approved Proposition 12,
489 487 # which established DST from April's last Sunday at 01:00 until September's
490 488 # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
491 489 # the fall-back date to October's last Sunday. See:
492 490 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
493 491 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
494 492 #
495 493 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
496 494 Rule CA 1948 only - Mar 14 2:01 1:00 D
497 495 Rule CA 1949 only - Jan 1 2:00 0 S
498 496 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D
499 497 Rule CA 1950 1961 - Sep lastSun 2:00 0 S
500 498 Rule CA 1962 1966 - Oct lastSun 2:00 0 S
501 499 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
502 500 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
503 501 -8:00 US P%sT 1946
504 502 -8:00 CA P%sT 1967
505 503 -8:00 US P%sT
506 504
507 505 # Alaska
508 506 # AK%sT is the modern abbreviation for -09 per USNO.
509 507 #
510 508 # From Paul Eggert (2017-06-15):
511 509 # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
512 510 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
513 511 # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the
514 512 # Russian forts and fleet at Sitka fired salutes to mark the ceremony of
515 513 # formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2.
516 514 # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1
517 515 # Sitka workers did not change their calendars until Sunday, 1867-10-20,
518 516 # and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P).
519 517 # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25.
520 518 # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf
521 519 # Include only the time zone part of this transition, ignoring the switch
522 520 # from Julian to Gregorian, since we can't represent the Julian calendar.
523 521 #
524 522 # As far as we know, of the locations mentioned below only Sitka was
525 523 # permanently inhabited in 1867 by anyone using either calendar.
526 524 # (Yakutat was colonized by the Russians in 1799, but the settlement was
527 525 # destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants
528 526 # were unaware of the US acquisition of Alaska, much less of any calendar or
529 527 # time change. However, the Russian-influenced part of Alaska did observe
530 528 # Russian time, and it is more accurate to model this than to ignore it.
531 529 # The database format requires an exact transition time; use the Russian
532 530 # salute as a somewhat-arbitrary time for the formal transfer of control for
533 531 # all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the
534 532 # local times of other Alaskan locations so that they change simultaneously.
535 533
536 534 # From Paul Eggert (2014-07-18):
537 535 # One opinion of the early-1980s turmoil in Alaska over time zones and
538 536 # daylight saving time appeared as graffiti on a Juneau airport wall:
539 537 # "Welcome to Juneau. Please turn your watch back to the 19th century."
540 538 # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01.
541 539 # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html
542 540 #
543 541 # Steve Ferguson (2011-01-31) referred to the following source:
544 542 # Norris F. Keeping time in Alaska: national directives, local response.
545 543 # Alaska History 2001;16(1-2).
546 544 # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/
547 545
548 546 # From Arthur David Olson (2011-02-01):
549 547 # Here's database-relevant material from the 2001 "Alaska History" article:
550 548 #
551 549 # On September 20 [1979]...DOT...officials decreed that on April 27,
552 550 # 1980, Juneau and other nearby communities would move to Yukon Time.
553 551 # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on
554 552 # Pacific Time.
555 553 #
556 554 # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the
557 555 # Department's September 1979 decision. Juneau and other communities in
558 556 # northern Southeast reverted to Pacific Time on October 26.
559 557 #
560 558 # On October 28 [1983]...the Metlakatla Indian Community Council voted
561 559 # unanimously to keep the reservation on Pacific Time.
562 560 #
563 561 # According to DOT official Joanne Petrie, Indian reservations are not
564 562 # bound to follow time zones imposed by neighboring jurisdictions.
565 563 #
566 564 # (The last is consistent with how the database now handles the Navajo
567 565 # Nation.)
568 566
569 567 # From Arthur David Olson (2011-02-09):
570 568 # I just spoke by phone with a staff member at the Metlakatla Indian
571 569 # Community office (using contact information available at
572 570 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla
573 571 # It's shortly after 1:00 here on the east coast of the United States;
574 572 # the staffer said it was shortly after 10:00 there. When I asked whether
575 573 # that meant they were on Pacific time, they said no - they were on their
576 574 # own time. I asked about daylight saving; they said it wasn't used. I
577 575 # did not inquire about practices in the past.
578 576
579 577 # From Arthur David Olson (2011-08-17):
580 578 # For lack of better information, assume that Metlakatla's
581 579 # abandonment of use of daylight saving resulted from the 1983 vote.
582 580
583 581 # From Steffen Thorsen (2015-11-09):
584 582 # It seems Metlakatla did go off PST on Sunday, November 1, changing
585 583 # their time to AKST and are going to follow Alaska's DST, switching
586 584 # between AKST and AKDT from now on....
587 585 # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
588 586
589 587 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
590 588 Zone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32
591 589 -8:57:41 - LMT 1900 Aug 20 12:00
592 590 -8:00 - PST 1942
593 591 -8:00 US P%sT 1946
594 592 -8:00 - PST 1969
595 593 -8:00 US P%sT 1980 Apr 27 2:00
596 594 -9:00 US Y%sT 1980 Oct 26 2:00
597 595 -8:00 US P%sT 1983 Oct 30 2:00
598 596 -9:00 US Y%sT 1983 Nov 30
599 597 -9:00 US AK%sT
600 598 Zone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30
601 599 -9:01:13 - LMT 1900 Aug 20 12:00
602 600 -8:00 - PST 1942
603 601 -8:00 US P%sT 1946
604 602 -8:00 - PST 1969
605 603 -8:00 US P%sT 1983 Oct 30 2:00
606 604 -9:00 US Y%sT 1983 Nov 30
607 605 -9:00 US AK%sT
608 606 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55
609 607 -8:46:18 - LMT 1900 Aug 20 12:00
610 608 -8:00 - PST 1942
611 609 -8:00 US P%sT 1946
612 610 -8:00 - PST 1969
613 611 -8:00 US P%sT 1983 Oct 30 2:00
614 612 -8:00 - PST 2015 Nov 1 2:00
615 613 -9:00 US AK%sT
616 614 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18
617 615 -9:18:55 - LMT 1900 Aug 20 12:00
618 616 -9:00 - YST 1942
619 617 -9:00 US Y%sT 1946
620 618 -9:00 - YST 1969
621 619 -9:00 US Y%sT 1983 Nov 30
622 620 -9:00 US AK%sT
623 621 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37
624 622 -9:59:36 - LMT 1900 Aug 20 12:00
625 623 -10:00 - AST 1942
626 624 -10:00 US A%sT 1967 Apr
627 625 -10:00 - AHST 1969
628 626 -10:00 US AH%sT 1983 Oct 30 2:00
629 627 -9:00 US Y%sT 1983 Nov 30
630 628 -9:00 US AK%sT
631 629 Zone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35
632 630 -11:01:38 - LMT 1900 Aug 20 12:00
633 631 -11:00 - NST 1942
634 632 -11:00 US N%sT 1946
635 633 -11:00 - NST 1967 Apr
636 634 -11:00 - BST 1969
637 635 -11:00 US B%sT 1983 Oct 30 2:00
638 636 -9:00 US Y%sT 1983 Nov 30
639 637 -9:00 US AK%sT
640 638 Zone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35
641 639 -11:46:38 - LMT 1900 Aug 20 12:00
642 640 -11:00 - NST 1942
643 641 -11:00 US N%sT 1946
644 642 -11:00 - NST 1967 Apr
645 643 -11:00 - BST 1969
646 644 -11:00 US B%sT 1983 Oct 30 2:00
647 645 -10:00 US AH%sT 1983 Nov 30
648 646 -10:00 US H%sT
649 647 # The following switches don't quite make our 1970 cutoff.
650 648 #
651 649 # Shanks writes that part of southwest Alaska (e.g. Aniak)
652 650 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
653 651 # and another part (e.g. Akiak) made the same switch five weeks later.
654 652 #
655 653 # From David Flater (2004-11-09):
656 654 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
657 655 # Historic Preservation Commission, provided this information, which
658 656 # suggests that Unalaska deviated from statutory time from early 1967
659 657 # possibly until 1983:
660 658 #
661 659 # Minutes of the Unalaska City Council Meeting, January 10, 1967:
662 660 # "Except for St. Paul and Akutan, Unalaska is the only important
663 661 # location not on Alaska Standard Time. The following resolution was
664 662 # made by William Robinson and seconded by Henry Swanson: Be it
665 663 # resolved that the City of Unalaska hereby goes to Alaska Standard
666 664 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
667 665 # January 14, Alaska Standard Time.) This resolution was passed with
668 666 # three votes for and one against."
669 667
670 668 # Hawaii
671 669
672 670 # From Arthur David Olson (2010-12-09):
673 671 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
674 672 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
675 673 # the article is available at
676 674 # https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
677 675 # and indicates that standard time was adopted effective noon, January
678 676 # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
679 677 # saving for the period between the last Sunday of each April and the
680 678 # last Sunday of each September, but less than a month later repealed the
681 679 # act," (page 220), that year-round daylight saving time was in effect
682 680 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
683 681 # when clocks changed) and that clocks were changed by 30 minutes
684 682 # effective the second Sunday of June, 1947 (page 219, with no time of
685 683 # day given for when clocks changed). A footnote for the 1933 changes
686 684 # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933)
687 685 # and Act 163 (approved 21 May 1933)."
688 686
689 687 # From Arthur David Olson (2011-01-19):
690 688 # The following is from "Laws of the Territory of Hawaii Passed by the
691 689 # Seventeenth Legislature: Regular Session 1933," available (as of
692 690 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act
693 691 # 90...At 2 o'clock ante meridian of the last Sunday in April of each
694 692 # year, the standard time of this Territory shall be advanced one
695 693 # hour...This Act shall take effect upon its approval. Approved this 26th
696 694 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
697 695 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
698 696 # hereby repealed...This Act shall take effect upon its approval, upon
699 697 # which date the standard time of this Territory shall be restored to
700 698 # that existing immediately prior to the taking effect of said Act 90.
701 699 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
702 700 # of the Territory of Hawaii."
703 701 #
704 702 # Note that 1933-05-21 was a Sunday.
705 703 # We're left to guess the time of day when Act 163 was approved; guess noon.
706 704
707 705 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
708 706 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00
709 707 -10:30 - HST 1933 Apr 30 2:00
710 708 -10:30 1:00 HDT 1933 May 21 12:00
711 709 -10:30 - HST 1942 Feb 9 2:00
712 710 -10:30 1:00 HDT 1945 Sep 30 2:00
713 711 -10:30 - HST 1947 Jun 8 2:00
714 712 -10:00 - HST
715 713
716 714 # Now we turn to US areas that have diverged from the consensus since 1970.
717 715
718 716 # Arizona mostly uses MST.
719 717
720 718 # From Paul Eggert (2002-10-20):
721 719 #
722 720 # The information in the rest of this paragraph is derived from the
723 721 # Daylight Saving Time web page
724 722 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
725 723 # maintained by the Arizona State Library, Archives and Public Records.
726 724 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
727 725 # time, but by federal law railroads, airlines, bus lines, military
728 726 # personnel, and some engaged in interstate commerce continued to
729 727 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix
730 728 # Gazette says that was the date the law changed, and that 04-01 was
731 729 # the date the state's clocks would change. In 1945 the State of
732 730 # Arizona used standard time all year, again with exceptions only as
733 731 # mandated by federal law. Arizona observed DST in 1967, but Arizona
734 732 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
735 733 #
736 734 # Shanks says the 1944 experiment came to an end on 1944-03-17.
737 735 # Go with the Arizona State Library instead.
738 736
739 737 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
740 738 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42
741 739 -7:00 US M%sT 1944 Jan 1 0:01
742 740 -7:00 - MST 1944 Apr 1 0:01
743 741 -7:00 US M%sT 1944 Oct 1 0:01
744 742 -7:00 - MST 1967
745 743 -7:00 US M%sT 1968 Mar 21
746 744 -7:00 - MST
747 745 # From Arthur David Olson (1988-02-13):
748 746 # A writer from the Inter Tribal Council of Arizona, Inc.,
749 747 # notes in private correspondence dated 1987-12-28 that "Presently, only the
750 748 # Navajo Nation participates in the Daylight Saving Time policy, due to its
751 749 # large size and location in three states." (The "only" means that other
752 750 # tribal nations don't use DST.)
753 751 #
754 752 # From Paul Eggert (2013-08-26):
755 753 # See America/Denver for a zone appropriate for the Navajo Nation.
756 754
757 755 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
758 756 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
759 757 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
760 758 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
761 759 # Teton, Twin Falls, Valley, Washington counties, and the southern
762 760 # quarter of Idaho county) and eastern Oregon (most of Malheur County)
763 761 # switched four weeks late in 1974.
764 762 #
765 763 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
766 764 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11
767 765 -8:00 US P%sT 1923 May 13 2:00
768 766 -7:00 US M%sT 1974
769 767 -7:00 - MST 1974 Feb 3 2:00
770 768 -7:00 US M%sT
771 769
772 770 # Indiana
773 771 #
774 772 # For a map of Indiana's time zone regions, see:
775 773 # https://en.wikipedia.org/wiki/Time_in_Indiana
776 774 #
777 775 # From Paul Eggert (2007-08-17):
778 776 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
779 777 # with the following exceptions:
780 778 #
781 779 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
782 780 # Vanderburgh, and Warrick counties have been like America/Chicago.
783 781 #
784 782 # - Dearborn and Ohio counties have been like America/New_York.
785 783 #
786 784 # - Clark, Floyd, and Harrison counties have been like
787 785 # America/Kentucky/Louisville.
788 786 #
789 787 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
790 788 # and Switzerland counties have their own time zone histories as noted below.
791 789 #
792 790 # Shanks partitioned Indiana into 345 regions, each with its own time history,
793 791 # and wrote "Even newspaper reports present contradictory information."
794 792 # Those Hoosiers! Such a flighty and changeable people!
795 793 # Fortunately, most of the complexity occurred before our cutoff date of 1970.
796 794 #
797 795 # Other than Indianapolis, the Indiana place names are so nondescript
798 796 # that they would be ambiguous if we left them at the 'America' level.
799 797 # So we reluctantly put them all in a subdirectory 'America/Indiana'.
800 798
801 799 # From Paul Eggert (2014-06-26):
802 800 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
803 801 # says "DOT is relocating the time zone boundary in Indiana to move Starke,
804 802 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
805 803 # Eastern Time Zone to the Central Time Zone.... The effective date of
806 804 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the
807 805 # changeover date from standard time to Daylight Saving Time."
808 806 # Strictly speaking, this meant the affected counties changed their
809 807 # clocks twice that night, but this obviously was in error. The intent
810 808 # was that 01:59:59 EST be followed by 02:00:00 CDT.
811 809
812 810 # From Gwillim Law (2007-02-10):
813 811 # The Associated Press has been reporting that Pulaski County, Indiana is
814 812 # going to switch from Central to Eastern Time on March 11, 2007....
815 813 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
816 814
817 815 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
818 816 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
819 817 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
820 818 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
821 819 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
822 820 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
823 821 -6:00 US C%sT 1920
824 822 -6:00 Indianapolis C%sT 1942
825 823 -6:00 US C%sT 1946
826 824 -6:00 Indianapolis C%sT 1955 Apr 24 2:00
827 825 -5:00 - EST 1957 Sep 29 2:00
828 826 -6:00 - CST 1958 Apr 27 2:00
829 827 -5:00 - EST 1969
830 828 -5:00 US E%sT 1971
831 829 -5:00 - EST 2006
832 830 -5:00 US E%sT
833 831 #
834 832 # Eastern Crawford County, Indiana, left its clocks alone in 1974,
835 833 # as well as from 1976 through 2005.
836 834 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
837 835 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
838 836 Rule Marengo 1951 only - Sep lastSun 2:00 0 S
839 837 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
840 838 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
841 839 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
842 840 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37
843 841 -6:00 US C%sT 1951
844 842 -6:00 Marengo C%sT 1961 Apr 30 2:00
845 843 -5:00 - EST 1969
846 844 -5:00 US E%sT 1974 Jan 6 2:00
847 845 -6:00 1:00 CDT 1974 Oct 27 2:00
848 846 -5:00 US E%sT 1976
849 847 -5:00 - EST 2006
850 848 -5:00 US E%sT
851 849 #
852 850 # Daviess, Dubois, Knox, and Martin Counties, Indiana,
853 851 # switched from eastern to central time in April 2006, then switched back
854 852 # in November 2007.
855 853 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
856 854 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D
857 855 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S
858 856 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D
859 857 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S
860 858 Rule Vincennes 1955 only - May 1 0:00 1:00 D
861 859 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D
862 860 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S
863 861 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S
864 862 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S
865 863 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
866 864 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53
867 865 -6:00 US C%sT 1946
868 866 -6:00 Vincennes C%sT 1964 Apr 26 2:00
869 867 -5:00 - EST 1969
870 868 -5:00 US E%sT 1971
871 869 -5:00 - EST 2006 Apr 2 2:00
872 870 -6:00 US C%sT 2007 Nov 4 2:00
873 871 -5:00 US E%sT
874 872 #
875 873 # Perry County, Indiana, switched from eastern to central time in April 2006.
876 874 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
877 875 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D
878 876 Rule Perry 1946 only - Sep lastSun 2:00 0 S
879 877 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D
880 878 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S
881 879 Rule Perry 1955 only - May 1 0:00 1:00 D
882 880 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D
883 881 Rule Perry 1960 only - Oct lastSun 2:00 0 S
884 882 Rule Perry 1961 only - Sep lastSun 2:00 0 S
885 883 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S
886 884 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
887 885 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57
888 886 -6:00 US C%sT 1946
889 887 -6:00 Perry C%sT 1964 Apr 26 2:00
890 888 -5:00 - EST 1969
891 889 -5:00 US E%sT 1971
892 890 -5:00 - EST 2006 Apr 2 2:00
893 891 -6:00 US C%sT
894 892 #
895 893 # Pike County, Indiana moved from central to eastern time in 1977,
896 894 # then switched back in 2006, then switched back again in 2007.
897 895 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
898 896 Rule Pike 1955 only - May 1 0:00 1:00 D
899 897 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S
900 898 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D
901 899 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S
902 900 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
903 901 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53
904 902 -6:00 US C%sT 1955
905 903 -6:00 Pike C%sT 1965 Apr 25 2:00
906 904 -5:00 - EST 1966 Oct 30 2:00
907 905 -6:00 US C%sT 1977 Oct 30 2:00
908 906 -5:00 - EST 2006 Apr 2 2:00
909 907 -6:00 US C%sT 2007 Nov 4 2:00
910 908 -5:00 US E%sT
911 909 #
912 910 # Starke County, Indiana moved from central to eastern time in 1991,
913 911 # then switched back in 2006.
914 912 # From Arthur David Olson (1991-10-28):
915 913 # An article on page A3 of the Sunday, 1991-10-27 Washington Post
916 914 # notes that Starke County switched from Central time to Eastern time as of
917 915 # 1991-10-27.
918 916 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
919 917 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
920 918 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
921 919 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
922 920 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
923 921 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
924 922 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
925 923 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30
926 924 -6:00 US C%sT 1947
927 925 -6:00 Starke C%sT 1962 Apr 29 2:00
928 926 -5:00 - EST 1963 Oct 27 2:00
929 927 -6:00 US C%sT 1991 Oct 27 2:00
930 928 -5:00 - EST 2006 Apr 2 2:00
931 929 -6:00 US C%sT
932 930 #
933 931 # Pulaski County, Indiana, switched from eastern to central time in
934 932 # April 2006 and then switched back in March 2007.
935 933 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
936 934 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D
937 935 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S
938 936 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S
939 937 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S
940 938 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
941 939 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35
942 940 -6:00 US C%sT 1946
943 941 -6:00 Pulaski C%sT 1961 Apr 30 2:00
944 942 -5:00 - EST 1969
945 943 -5:00 US E%sT 1971
946 944 -5:00 - EST 2006 Apr 2 2:00
947 945 -6:00 US C%sT 2007 Mar 11 2:00
948 946 -5:00 US E%sT
|
↓ open down ↓ |
477 lines elided |
↑ open up ↑ |
949 947 #
950 948 # Switzerland County, Indiana, did not observe DST from 1973 through 2005.
951 949 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
952 950 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44
953 951 -6:00 US C%sT 1954 Apr 25 2:00
954 952 -5:00 - EST 1969
955 953 -5:00 US E%sT 1973
956 954 -5:00 - EST 2006
957 955 -5:00 US E%sT
958 956
957 +# From Paul Eggert (2018-03-20):
958 +# The Louisville & Nashville Railroad's 1883-11-18 change occurred at
959 +# 10:00 old local time; train were supposed to come to a standstill
960 +# for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not
961 +# clear how this matched civil time in Louisville, so for now continue
962 +# to assume Louisville switched at noon new local time, like New York.
963 +#
959 964 # Part of Kentucky left its clocks alone in 1974.
960 965 # This also includes Clark, Floyd, and Harrison counties in Indiana.
961 966 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
962 967 Rule Louisville 1921 only - May 1 2:00 1:00 D
963 968 Rule Louisville 1921 only - Sep 1 2:00 0 S
964 969 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D
965 970 Rule Louisville 1941 only - Sep lastSun 2:00 0 S
966 971 Rule Louisville 1946 only - Jun 2 2:00 0 S
967 972 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
968 973 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S
969 974 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
970 975 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58
971 976 -6:00 US C%sT 1921
972 977 -6:00 Louisville C%sT 1942
973 978 -6:00 US C%sT 1946
974 979 -6:00 Louisville C%sT 1961 Jul 23 2:00
975 980 -5:00 - EST 1968
976 981 -5:00 US E%sT 1974 Jan 6 2:00
977 982 -6:00 1:00 CDT 1974 Oct 27 2:00
978 983 -5:00 US E%sT
979 984 #
980 985 # Wayne County, Kentucky
981 986 #
982 987 # From Lake Cumberland LIFE
983 988 # http://www.lake-cumberland.com/life/archive/news990129time.shtml
984 989 # (1999-01-29) via WKYM-101.7:
985 990 # Clinton County has joined Wayne County in asking the DoT to change from
986 991 # the Central to the Eastern time zone.... The Wayne County government made
987 992 # the same request in December. And while Russell County officials have not
988 993 # taken action, the majority of respondents to a poll conducted there in
989 994 # August indicated they would like to change to "fast time" also.
990 995 # The three Lake Cumberland counties are the farthest east of any U.S.
991 996 # location in the Central time zone.
992 997 #
993 998 # From Rich Wales (2000-08-29):
994 999 # After prolonged debate, and despite continuing deep differences of opinion,
995 1000 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
996 1001 # (-0500) time. They won't "fall back" this year. See Sara Shipley,
997 1002 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
998 1003 #
999 1004 # From Paul Eggert (2001-07-16):
1000 1005 # The final rule was published in the
1001 1006 # Federal Register 65, 160 (2000-08-17), pp 50154-50158.
1002 1007 # https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm
1003 1008 #
1004 1009 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36
1005 1010 -6:00 US C%sT 1946
1006 1011 -6:00 - CST 1968
1007 1012 -6:00 US C%sT 2000 Oct 29 2:00
1008 1013 -5:00 US E%sT
1009 1014
1010 1015
1011 1016 # From Rives McDow (2000-08-30):
1012 1017 # Here ... are all the changes in the US since 1985.
1013 1018 # Kearny County, KS (put all of county on central;
1014 1019 # previously split between MST and CST) ... 1990-10
1015 1020 # Starke County, IN (from CST to EST) ... 1991-10
1016 1021 # Oliver County, ND (from MST to CST) ... 1992-10
1017 1022 # West Wendover, NV (from PST TO MST) ... 1999-10
1018 1023 # Wayne County, KY (from CST to EST) ... 2000-10
1019 1024 #
1020 1025 # From Paul Eggert (2001-07-17):
1021 1026 # We don't know where the line used to be within Kearny County, KS,
1022 1027 # so omit that change for now.
1023 1028 # See America/Indiana/Knox for the Starke County, IN change.
1024 1029 # See America/North_Dakota/Center for the Oliver County, ND change.
1025 1030 # West Wendover, NV officially switched from Pacific to mountain time on
1026 1031 # 1999-10-31. See the
1027 1032 # Federal Register 64, 203 (1999-10-21), pp 56705-56707.
1028 1033 # https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm
1029 1034 # However, the Federal Register says that West Wendover already operated
1030 1035 # on mountain time, and the rule merely made this official;
1031 1036 # hence a separate tz entry is not needed.
1032 1037
1033 1038 # Michigan
1034 1039 #
1035 1040 # From Bob Devine (1988-01-28):
1036 1041 # Michigan didn't observe DST from 1968 to 1973.
1037 1042 #
1038 1043 # From Paul Eggert (1999-03-31):
1039 1044 # Shanks writes that Michigan started using standard time on 1885-09-18,
1040 1045 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
1041 1046 # that Detroit kept
1042 1047 #
1043 1048 # local time until 1900 when the City Council decreed that clocks should
1044 1049 # be put back twenty-eight minutes to Central Standard Time. Half the
1045 1050 # city obeyed, half refused. After considerable debate, the decision
1046 1051 # was rescinded and the city reverted to Sun time. A derisive offer to
1047 1052 # erect a sundial in front of the city hall was referred to the
1048 1053 # Committee on Sewers. Then, in 1905, Central time was adopted
1049 1054 # by city vote.
1050 1055 #
1051 1056 # This story is too entertaining to be false, so go with Howse over Shanks.
1052 1057 #
1053 1058 # From Paul Eggert (2001-03-06):
1054 1059 # Garland (1927) writes "Cleveland and Detroit advanced their clocks
1055 1060 # one hour in 1914." This change is not in Shanks. We have no more
1056 1061 # info, so omit this for now.
1057 1062 #
1058 1063 # From Paul Eggert (2017-07-26):
1059 1064 # Although Shanks says Detroit observed DST in 1967 from 06-14 00:01
1060 1065 # until 10-29 00:01, I now see multiple reports that this is incorrect.
1061 1066 # For example, according to a 50-year anniversary report about the 1967
1062 1067 # Detroit riots and a major-league doubleheader on 1967-07-23, "By the time
1063 1068 # the last fly ball of the doubleheader settled into the glove of leftfielder
1064 1069 # Lenny Green, it was after 7 p.m. Detroit did not observe daylight saving
1065 1070 # time, so light was already starting to fail. Twilight was made even deeper
1066 1071 # by billowing columns of smoke that ascended in an unbroken wall north of the
1067 1072 # ballpark." See: Dow B. Detroit '67: As violence unfolded, Tigers played two
1068 1073 # at home vs. Yankees. Detroit Free Press 2017-07-23.
1069 1074 # https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/
1070 1075 #
1071 1076 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
1072 1077 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1073 1078 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
1074 1079 Rule Detroit 1948 only - Sep lastSun 2:00 0 S
1075 1080 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1076 1081 Zone America/Detroit -5:32:11 - LMT 1905
1077 1082 -6:00 - CST 1915 May 15 2:00
1078 1083 -5:00 - EST 1942
1079 1084 -5:00 US E%sT 1946
1080 1085 -5:00 Detroit E%sT 1973
1081 1086 -5:00 US E%sT 1975
1082 1087 -5:00 - EST 1975 Apr 27 2:00
1083 1088 -5:00 US E%sT
1084 1089 #
1085 1090 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
1086 1091 # switched from EST to CST/CDT in 1973.
1087 1092 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1088 1093 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
1089 1094 Rule Menominee 1946 only - Sep lastSun 2:00 0 S
1090 1095 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
1091 1096 Rule Menominee 1966 only - Oct lastSun 2:00 0 S
1092 1097 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1093 1098 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
1094 1099 -6:00 US C%sT 1946
1095 1100 -6:00 Menominee C%sT 1969 Apr 27 2:00
1096 1101 -5:00 - EST 1973 Apr 29 2:00
1097 1102 -6:00 US C%sT
1098 1103
1099 1104 # Navassa
1100 1105 # administered by the US Fish and Wildlife Service
1101 1106 # claimed by US under the provisions of the 1856 Guano Islands Act
1102 1107 # also claimed by Haiti
1103 1108 # occupied 1857/1900 by the Navassa Phosphate Co
1104 1109 # US lighthouse 1917/1996-09
1105 1110 # currently uninhabited
1106 1111 # see Mark Fineman, "An Isle Rich in Guano and Discord",
1107 1112 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1108 1113 # Jimmy Skaggs, _The Great Guano Rush_ (1994).
1109 1114
1110 1115 ################################################################################
1111 1116
1112 1117
1113 1118 # From Paul Eggert (2017-02-10):
1114 1119 #
1115 1120 # Unless otherwise specified, the source for data through 1990 is:
1116 1121 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
1117 1122 # San Diego: ACS Publications, Inc. (2003).
1118 1123 # Unfortunately this book contains many errors and cites no sources.
1119 1124 #
1120 1125 # Many years ago Gwillim Law wrote that a good source
1121 1126 # for time zone data was the International Air Transport
1122 1127 # Association's Standard Schedules Information Manual (IATA SSIM),
1123 1128 # published semiannually. Law sent in several helpful summaries
1124 1129 # of the IATA's data after 1990. Except where otherwise noted,
1125 1130 # IATA SSIM is the source for entries after 1990.
1126 1131 #
1127 1132 # Other sources occasionally used include:
1128 1133 #
1129 1134 # Edward W. Whitman, World Time Differences,
1130 1135 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
1131 1136 # which I found in the UCLA library.
1132 1137 #
1133 1138 # William Willett, The Waste of Daylight, 19th edition
1134 1139 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
1135 1140 # [PDF] (1914-03)
1136 1141 #
1137 1142 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1138 1143 # <https://www.jstor.org/stable/1774359>.
1139 1144 #
1140 1145 # See the 'europe' file for Greenland.
1141 1146
1142 1147 # Canada
1143 1148
1144 1149 # From Alain LaBonté (1994-11-14):
1145 1150 # I post here the time zone abbreviations standardized in Canada
1146 1151 # for both English and French in the CAN/CSA-Z234.4-89 standard....
1147 1152 #
1148 1153 # UTC Standard time Daylight saving time
1149 1154 # offset French English French English
1150 1155 # -2:30 - - HAT NDT
1151 1156 # -3 - - HAA ADT
1152 1157 # -3:30 HNT NST - -
1153 1158 # -4 HNA AST HAE EDT
1154 1159 # -5 HNE EST HAC CDT
1155 1160 # -6 HNC CST HAR MDT
1156 1161 # -7 HNR MST HAP PDT
1157 1162 # -8 HNP PST HAY YDT
1158 1163 # -9 HNY YST - -
1159 1164 #
1160 1165 # HN: Heure Normale ST: Standard Time
1161 1166 # HA: Heure Avancée DT: Daylight saving Time
1162 1167 #
1163 1168 # A: de l'Atlantique Atlantic
1164 1169 # C: du Centre Central
1165 1170 # E: de l'Est Eastern
1166 1171 # M: Mountain
1167 1172 # N: Newfoundland
1168 1173 # P: du Pacifique Pacific
1169 1174 # R: des Rocheuses
1170 1175 # T: de Terre-Neuve
1171 1176 # Y: du Yukon Yukon
1172 1177 #
1173 1178 # From Paul Eggert (1994-11-22):
1174 1179 # Alas, this sort of thing must be handled by localization software.
1175 1180
1176 1181 # Unless otherwise specified, the data entries for Canada are all from Shanks
1177 1182 # & Pottenger.
1178 1183
1179 1184 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1180 1185 # 2007-03-01):
1181 1186 # The British Columbia government announced yesterday that it will
1182 1187 # adjust daylight savings next year to align with changes in the
1183 1188 # U.S. and the rest of Canada....
1184 1189 # https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm
1185 1190 # ...
1186 1191 # Nova Scotia
1187 1192 # Daylight saving time will be extended by four weeks starting in 2007....
1188 1193 # https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf
1189 1194 #
1190 1195 # [For New Brunswick] the new legislation dictates that the time change is to
1191 1196 # be done at 02:00 instead of 00:01.
1192 1197 # https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
1193 1198 # ...
1194 1199 # Manitoba has traditionally changed the clock every fall at 03:00.
1195 1200 # As of 2006, the transition is to take place one hour earlier at 02:00.
1196 1201 # https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
1197 1202 # ...
1198 1203 # [Alberta, Ontario, Quebec] will follow US rules.
1199 1204 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
1200 1205 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
1201 1206 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
1202 1207 # ...
1203 1208 # P.E.I. will follow US rules....
1204 1209 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1205 1210 # ...
1206 1211 # Province of Newfoundland and Labrador....
1207 1212 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
1208 1213 # ...
1209 1214 # Yukon
1210 1215 # https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
1211 1216 # ...
1212 1217 # N.W.T. will follow US rules. Whoever maintains the government web site
1213 1218 # does not seem to believe in bookmarks. To see the news release, click the
1214 1219 # following link and search for "Daylight Savings Time Change". Press the
1215 1220 # "Daylight Savings Time Change" link; it will fire off a popup using
1216 1221 # JavaScript.
1217 1222 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1218 1223 # ...
1219 1224 # Nunavut
1220 1225 # An amendment to the Interpretation Act was registered on February 19/2007....
1221 1226 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
1222 1227
1223 1228 # From Paul Eggert (2014-10-18):
1224 1229 # H. David Matthews and Mary Vincent's map
1225 1230 # "It's about TIME", _Canadian Geographic_ (September-October 1998)
1226 1231 # http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp
1227 1232 # contains detailed boundaries for regions observing nonstandard
1228 1233 # time and daylight saving time arrangements in Canada circa 1998.
1229 1234 #
1230 1235 # National Research Council Canada maintains info about time zones and DST.
1231 1236 # https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
1232 1237 # https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
1233 1238 # Its unofficial information is often taken from Matthews and Vincent.
1234 1239
1235 1240 # From Paul Eggert (2006-06-27):
1236 1241 # For now, assume all of DST-observing Canada will fall into line with the
1237 1242 # new US DST rules,
1238 1243
1239 1244 # From Chris Walton (2011-12-01)
1240 1245 # In the first of Tammy Hardwick's articles
1241 1246 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1242 1247 # she quotes the Friday November 1/1918 edition of the Creston Review.
1243 1248 # The quote includes these two statements:
1244 1249 # 'Sunday the CPR went back to the old system of time...'
1245 1250 # '... The daylight saving scheme was dropped all over Canada at the same time,'
1246 1251 # These statements refer to a transition from daylight time to standard time
1247 1252 # that occurred nationally on Sunday October 27/1918. This transition was
1248 1253 # also documented in the Saturday October 26/1918 edition of the Toronto Star.
1249 1254
1250 1255 # In light of that evidence, we alter the date from the earlier believed
1251 1256 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day
1252 1257 # than Thursday) in all Canadian rulesets.
1253 1258
1254 1259 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1255 1260 Rule Canada 1918 only - Apr 14 2:00 1:00 D
1256 1261 Rule Canada 1918 only - Oct 27 2:00 0 S
1257 1262 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War
1258 1263 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace
1259 1264 Rule Canada 1945 only - Sep 30 2:00 0 S
1260 1265 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
1261 1266 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S
1262 1267 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D
1263 1268 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D
1264 1269 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S
1265 1270
1266 1271
1267 1272 # Newfoundland and Labrador
1268 1273
1269 1274 # From Paul Eggert (2017-10-14):
1270 1275 # Legally Labrador should observe Newfoundland time; see:
1271 1276 # McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07
1272 1277 # http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/
1273 1278 # Matthews and Vincent (1998) write that the only part of Labrador
1274 1279 # that follows the rules is the southeast corner, including Port Hope
1275 1280 # Simpson and Mary's Harbour, but excluding, say, Black Tickle.
1276 1281
1277 1282 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1278 1283 Rule StJohns 1917 only - Apr 8 2:00 1:00 D
1279 1284 Rule StJohns 1917 only - Sep 17 2:00 0 S
1280 1285 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
1281 1286 Rule StJohns 1919 only - May 5 23:00 1:00 D
1282 1287 Rule StJohns 1919 only - Aug 12 23:00 0 S
1283 1288 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
1284 1289 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
1285 1290 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
1286 1291 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
1287 1292 # Pottenger.
1288 1293 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D
1289 1294 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S
1290 1295 # Whitman gives the following transitions:
1291 1296 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
1292 1297 # but go with Shanks & Pottenger and assume they used Canadian rules.
1293 1298 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
1294 1299 # Apr 30 - Sep 24; go with Shanks & Pottenger.
1295 1300 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
1296 1301 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
1297 1302 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
1298 1303 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
1299 1304 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S
1300 1305 # From Paul Eggert (2000-10-02):
1301 1306 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
1302 1307 # at 00:01 local time. For now, assume it started in 1987.
1303 1308
1304 1309 # From Michael Pelley (2011-09-12):
1305 1310 # We received today, Monday, September 12, 2011, notification that the
1306 1311 # changes to the Newfoundland Standard Time Act have been proclaimed.
1307 1312 # The change in the Act stipulates that the change from Daylight Savings
1308 1313 # Time to Standard Time and from Standard Time to Daylight Savings Time
1309 1314 # now occurs at 2:00AM.
1310 1315 # ...
1311 1316 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
1312 1317 # ...
1313 1318 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery
1314 1319 # Office of the Chief Information Officer
1315 1320 # Executive Council
1316 1321 # Government of Newfoundland & Labrador
1317 1322
1318 1323 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
1319 1324 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
1320 1325 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
1321 1326 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
1322 1327 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D
1323 1328 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S
1324 1329 #
1325 1330 # St John's has an apostrophe, but Posix file names can't have apostrophes.
1326 1331 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1327 1332 Zone America/St_Johns -3:30:52 - LMT 1884
1328 1333 -3:30:52 StJohns N%sT 1918
1329 1334 -3:30:52 Canada N%sT 1919
1330 1335 -3:30:52 StJohns N%sT 1935 Mar 30
1331 1336 -3:30 StJohns N%sT 1942 May 11
1332 1337 -3:30 Canada N%sT 1946
1333 1338 -3:30 StJohns N%sT 2011 Nov
1334 1339 -3:30 Canada N%sT
1335 1340
1336 1341 # most of east Labrador
1337 1342
1338 1343 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1339 1344 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1340 1345 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
1341 1346 -3:30:52 - NST 1918
1342 1347 -3:30:52 Canada N%sT 1919
1343 1348 -3:30:52 - NST 1935 Mar 30
1344 1349 -3:30 - NST 1936
1345 1350 -3:30 StJohns N%sT 1942 May 11
1346 1351 -3:30 Canada N%sT 1946
1347 1352 -3:30 StJohns N%sT 1966 Mar 15 2:00
1348 1353 -4:00 StJohns A%sT 2011 Nov
1349 1354 -4:00 Canada A%sT
1350 1355
1351 1356
1352 1357 # west Labrador, Nova Scotia, Prince Edward I
1353 1358
1354 1359 # From Brian Inglis (2015-07-20):
1355 1360 # From the historical weather station records available at:
1356 1361 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1357 1362 # Sydney shares the same time history as Glace Bay, so was
1358 1363 # likely to be the same across the island....
1359 1364 # Sydney, as the capital and most populous location, or Cape Breton, would
1360 1365 # have been better names for the zone had we known this in 1996.
1361 1366
1362 1367 # From Paul Eggert (2015-07-20):
1363 1368 # Shanks & Pottenger write that since 1970 most of this region has been like
1364 1369 # Halifax. Many locales did not observe peacetime DST until 1972;
1365 1370 # the Cape Breton area, represented by Glace Bay, is the largest we know of
1366 1371 # (Glace Bay was perhaps not the best name choice but no point changing now).
1367 1372 # Shanks & Pottenger also write that Liverpool, NS was the only town
1368 1373 # in Canada to observe DST in 1971 but not 1970; for now we'll assume
1369 1374 # this is a typo.
1370 1375
1371 1376 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1372 1377 Rule Halifax 1916 only - Apr 1 0:00 1:00 D
1373 1378 Rule Halifax 1916 only - Oct 1 0:00 0 S
1374 1379 Rule Halifax 1920 only - May 9 0:00 1:00 D
1375 1380 Rule Halifax 1920 only - Aug 29 0:00 0 S
1376 1381 Rule Halifax 1921 only - May 6 0:00 1:00 D
1377 1382 Rule Halifax 1921 1922 - Sep 5 0:00 0 S
1378 1383 Rule Halifax 1922 only - Apr 30 0:00 1:00 D
1379 1384 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
1380 1385 Rule Halifax 1923 only - Sep 4 0:00 0 S
1381 1386 Rule Halifax 1924 only - Sep 15 0:00 0 S
1382 1387 Rule Halifax 1925 only - Sep 28 0:00 0 S
1383 1388 Rule Halifax 1926 only - May 16 0:00 1:00 D
1384 1389 Rule Halifax 1926 only - Sep 13 0:00 0 S
1385 1390 Rule Halifax 1927 only - May 1 0:00 1:00 D
1386 1391 Rule Halifax 1927 only - Sep 26 0:00 0 S
1387 1392 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
1388 1393 Rule Halifax 1928 only - Sep 9 0:00 0 S
1389 1394 Rule Halifax 1929 only - Sep 3 0:00 0 S
1390 1395 Rule Halifax 1930 only - Sep 15 0:00 0 S
1391 1396 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
1392 1397 Rule Halifax 1932 only - May 1 0:00 1:00 D
1393 1398 Rule Halifax 1933 only - Apr 30 0:00 1:00 D
1394 1399 Rule Halifax 1933 only - Oct 2 0:00 0 S
1395 1400 Rule Halifax 1934 only - May 20 0:00 1:00 D
1396 1401 Rule Halifax 1934 only - Sep 16 0:00 0 S
1397 1402 Rule Halifax 1935 only - Jun 2 0:00 1:00 D
1398 1403 Rule Halifax 1935 only - Sep 30 0:00 0 S
1399 1404 Rule Halifax 1936 only - Jun 1 0:00 1:00 D
1400 1405 Rule Halifax 1936 only - Sep 14 0:00 0 S
1401 1406 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
1402 1407 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
1403 1408 Rule Halifax 1939 only - May 28 0:00 1:00 D
1404 1409 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
1405 1410 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
1406 1411 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
1407 1412 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
1408 1413 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
1409 1414 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
1410 1415 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
1411 1416 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
1412 1417 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
1413 1418 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1414 1419 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
1415 1420 -4:00 Halifax A%sT 1918
1416 1421 -4:00 Canada A%sT 1919
1417 1422 -4:00 Halifax A%sT 1942 Feb 9 2:00s
1418 1423 -4:00 Canada A%sT 1946
1419 1424 -4:00 Halifax A%sT 1974
1420 1425 -4:00 Canada A%sT
1421 1426 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
1422 1427 -4:00 Canada A%sT 1953
1423 1428 -4:00 Halifax A%sT 1954
1424 1429 -4:00 - AST 1972
1425 1430 -4:00 Halifax A%sT 1974
1426 1431 -4:00 Canada A%sT
1427 1432
1428 1433 # New Brunswick
1429 1434
1430 1435 # From Paul Eggert (2007-01-31):
1431 1436 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1432 1437 # says they changed at 00:01 through 2006, and
1433 1438 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1434 1439 # clear that this was the case since at least 1993.
1435 1440 # For now, assume it started in 1993.
1436 1441
1437 1442 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1438 1443 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D
1439 1444 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S
1440 1445 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D
1441 1446 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S
1442 1447 Rule Moncton 1939 only - May 27 1:00 1:00 D
1443 1448 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S
1444 1449 Rule Moncton 1940 only - May 19 1:00 1:00 D
1445 1450 Rule Moncton 1941 only - May 4 1:00 1:00 D
1446 1451 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
1447 1452 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
1448 1453 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
1449 1454 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
1450 1455 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
1451 1456 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1452 1457 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
1453 1458 -5:00 - EST 1902 Jun 15
1454 1459 -4:00 Canada A%sT 1933
1455 1460 -4:00 Moncton A%sT 1942
1456 1461 -4:00 Canada A%sT 1946
1457 1462 -4:00 Moncton A%sT 1973
1458 1463 -4:00 Canada A%sT 1993
1459 1464 -4:00 Moncton A%sT 2007
1460 1465 -4:00 Canada A%sT
1461 1466
1462 1467 # Quebec
1463 1468
1464 1469 # From Paul Eggert (2015-03-24):
1465 1470 # See America/Toronto for most of Quebec, including Montreal.
1466 1471 #
1467 1472 # Matthews and Vincent (1998) also write that Quebec east of the -63
1468 1473 # meridian is supposed to observe AST, but residents as far east as
1469 1474 # Natashquan use EST/EDT, and residents east of Natashquan use AST.
1470 1475 # The Quebec department of justice writes in
1471 1476 # "The situation in Minganie and Basse-Côte-Nord"
1472 1477 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1473 1478 # that the coastal strip from just east of Natashquan to Blanc-Sablon
1474 1479 # observes Atlantic standard time all year round.
1475 1480 # https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1476 1481 # says this common practice was codified into law as of 2007.
1477 1482 # For lack of better info, guess this practice began around 1970, contra to
1478 1483 # Shanks & Pottenger who have this region observing AST/ADT.
1479 1484
1480 1485 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1481 1486 Zone America/Blanc-Sablon -3:48:28 - LMT 1884
1482 1487 -4:00 Canada A%sT 1970
1483 1488 -4:00 - AST
1484 1489
1485 1490 # Ontario
1486 1491
1487 1492 # From Paul Eggert (2006-07-09):
1488 1493 # Shanks & Pottenger write that since 1970 most of Ontario has been like
1489 1494 # Toronto.
1490 1495 # Thunder Bay skipped DST in 1973.
1491 1496 # Many smaller locales did not observe peacetime DST until 1974;
1492 1497 # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1493 1498 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1494 1499
1495 1500 # From Mark Brader (2003-07-26):
1496 1501 # [According to the Toronto Star] Orillia, Ontario, adopted DST
1497 1502 # effective Saturday, 1912-06-22, 22:00; the article mentions that
1498 1503 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1499 1504 # have already done so. In Orillia DST was to run until Saturday,
1500 1505 # 1912-08-31 (no time mentioned), but it was met with considerable
1501 1506 # hostility from certain segments of the public, and was revoked after
1502 1507 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1503 1508 # presumably that should be -07-06. (1912-06-19, -07-12; also letters
1504 1509 # earlier in June).
1505 1510 #
1506 1511 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1507 1512 #
1508 1513 # From Paul Eggert (2017-07-08):
1509 1514 # For more on Orillia, see: Daubs K. Bold attempt at daylight saving
1510 1515 # time became a comic failure in Orillia. Toronto Star 2017-07-08.
1511 1516 # https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html
1512 1517
1513 1518 # From Paul Eggert (1997-10-17):
1514 1519 # Mark Brader writes that an article in the 1997-10-14 Toronto Star
1515 1520 # says that Atikokan, Ontario currently does not observe DST,
1516 1521 # but will vote on 11-10 whether to use EST/EDT.
1517 1522 # He also writes that the Ontario Time Act (1990, Chapter T.9)
1518 1523 # http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html
1519 1524 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
1520 1525 # Officially Atikokan is therefore on CST/CDT, and most likely this report
1521 1526 # concerns a non-official time observed as a matter of local practice.
1522 1527 #
1523 1528 # From Paul Eggert (2000-10-02):
1524 1529 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
1525 1530 # New Osnaburgh observe CST all year, that Big Trout Lake observes
1526 1531 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
1527 1532 # violation of the official Ontario rules.
1528 1533 #
1529 1534 # From Paul Eggert (2006-07-09):
1530 1535 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
1531 1536 # 2005-07-21 Chronicle-Journal, which said:
1532 1537 #
1533 1538 # The clocks in Atikokan stay set on standard time year-round.
1534 1539 # This means they spend about half the time on central time and
1535 1540 # the other half on eastern time.
1536 1541 #
1537 1542 # For the most part, the system works, Mayor Dennis Brown said.
1538 1543 #
1539 1544 # "The majority of businesses in Atikokan deal more with Eastern
1540 1545 # Canada, but there are some that deal with Western Canada," he
1541 1546 # said. "I don't see any changes happening here."
1542 1547 #
1543 1548 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
1544 1549 # [New Osnaburgh] follow the same practice."
1545 1550
1546 1551 # From Garry McKinnon (2006-07-14) via Chris Walton:
1547 1552 # I chatted with a member of my board who has an outstanding memory
1548 1553 # and a long history in Atikokan (and in the telecom industry) and he
1549 1554 # can say for certain that Atikokan has been practicing the current
1550 1555 # time keeping since 1952, at least.
1551 1556
1552 1557 # From Paul Eggert (2006-07-17):
1553 1558 # Shanks & Pottenger say that Atikokan has agreed with Rainy River
1554 1559 # ever since standard time was introduced, but the information from
1555 1560 # McKinnon sounds more authoritative. For now, assume that Atikokan
1556 1561 # switched to EST immediately after WWII era daylight saving time
1557 1562 # ended. This matches the old (less-populous) America/Coral_Harbour
1558 1563 # entry since our cutoff date of 1970, so we can move
1559 1564 # America/Coral_Harbour to the 'backward' file.
1560 1565
1561 1566 # From Mark Brader (2010-03-06):
1562 1567 #
1563 1568 # Currently the database has:
1564 1569 #
1565 1570 # # Ontario
1566 1571 #
1567 1572 # # From Paul Eggert (2006-07-09):
1568 1573 # # Shanks & Pottenger write that since 1970 most of Ontario has been like
1569 1574 # # Toronto.
1570 1575 # # Thunder Bay skipped DST in 1973.
1571 1576 # # Many smaller locales did not observe peacetime DST until 1974;
1572 1577 # # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1573 1578 #
1574 1579 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
1575 1580 # right corner of page 1, it says that Toronto will return to standard
1576 1581 # time at 2 am Sunday morning (which agrees with the database), and that:
1577 1582 #
1578 1583 # The one-hour setback will go into effect throughout most of Ontario,
1579 1584 # except in areas like Windsor which remains on standard time all year.
1580 1585 #
1581 1586 # Windsor is, of course, a lot larger than Nipigon.
1582 1587 #
1583 1588 # I only came across this incidentally. I don't know if Windsor began
1584 1589 # observing DST when Detroit did, or in 1974, or on some other date.
1585 1590 #
1586 1591 # By the way, the article continues by noting that:
1587 1592 #
1588 1593 # Some cities in the United States have pushed the deadline back
1589 1594 # three weeks and will change over from daylight saving in October.
1590 1595
1591 1596 # From Arthur David Olson (2010-07-17):
1592 1597 #
1593 1598 # "Standard Time and Time Zones in Canada" appeared in
1594 1599 # The Journal of The Royal Astronomical Society of Canada,
1595 1600 # volume 26, number 2 (February 1932) and, as of 2010-07-17,
1596 1601 # was available at
1597 1602 # http://adsabs.harvard.edu/full/1932JRASC..26...49S
1598 1603 #
1599 1604 # It includes the text below (starting on page 57):
1600 1605 #
1601 1606 # A list of the places in Canada using daylight saving time would
1602 1607 # require yearly revision. From information kindly furnished by
1603 1608 # the provincial governments and by the postmasters in many cities
1604 1609 # and towns, it is found that the following places used daylight sav-
1605 1610 # ing in 1930. The information for the province of Quebec is definite,
1606 1611 # for the other provinces only approximate:
1607 1612 #
1608 1613 # Province Daylight saving time used
1609 1614 # Prince Edward Island Not used.
1610 1615 # Nova Scotia In Halifax only.
1611 1616 # New Brunswick In St. John only.
1612 1617 # Quebec In the following places:
1613 1618 # Montreal Lachine
1614 1619 # Quebec Mont-Royal
1615 1620 # Lévis Iberville
1616 1621 # St. Lambert Cap de la Madelèine
1617 1622 # Verdun Loretteville
1618 1623 # Westmount Richmond
1619 1624 # Outremont St. Jérôme
1620 1625 # Longueuil Greenfield Park
1621 1626 # Arvida Waterloo
1622 1627 # Chambly-Canton Beaulieu
1623 1628 # Melbourne La Tuque
1624 1629 # St. Théophile Buckingham
1625 1630 # Ontario Used generally in the cities and towns along
1626 1631 # the southerly part of the province. Not
1627 1632 # used in the northwesterly part.
1628 1633 # Manitoba Not used.
1629 1634 # Saskatchewan In Regina only.
1630 1635 # Alberta Not used.
1631 1636 # British Columbia Not used.
1632 1637 #
1633 1638 # With some exceptions, the use of daylight saving may be said to be limited
1634 1639 # to those cities and towns lying between Quebec city and Windsor, Ont.
1635 1640
1636 1641 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1637 1642 Rule Toronto 1919 only - Mar 30 23:30 1:00 D
1638 1643 Rule Toronto 1919 only - Oct 26 0:00 0 S
1639 1644 Rule Toronto 1920 only - May 2 2:00 1:00 D
1640 1645 Rule Toronto 1920 only - Sep 26 0:00 0 S
1641 1646 Rule Toronto 1921 only - May 15 2:00 1:00 D
1642 1647 Rule Toronto 1921 only - Sep 15 2:00 0 S
1643 1648 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D
1644 1649 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1645 1650 # was meant.
1646 1651 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S
1647 1652 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
1648 1653 # The 1927-to-1939 rules can be expressed more simply as
1649 1654 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S
1650 1655 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D
1651 1656 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D
1652 1657 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S
1653 1658 # The rules below avoid use of Sun>=25
1654 1659 # (which pre-2004 versions of zic cannot handle).
1655 1660 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S
1656 1661 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D
1657 1662 Rule Toronto 1932 only - May 1 2:00 1:00 D
1658 1663 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D
1659 1664 Rule Toronto 1933 only - Oct 1 2:00 0 S
1660 1665 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S
1661 1666 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S
1662 1667 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D
1663 1668 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D
1664 1669 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S
1665 1670 Rule Toronto 1949 only - Nov lastSun 0:00 0 S
1666 1671 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D
1667 1672 Rule Toronto 1950 only - Nov lastSun 2:00 0 S
1668 1673 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S
1669 1674 # Shanks & Pottenger say Toronto ended DST a week early in 1971,
1670 1675 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1671 1676 # is wrong, and that he had confirmed it by checking the 1971-10-30
1672 1677 # Toronto Star, which said that DST was ending 1971-10-31 as usual.
1673 1678 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S
1674 1679
1675 1680 # From Paul Eggert (2003-07-27):
1676 1681 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1677 1682 # Port Arthur, Ontario, the principle of the Bill has been in
1678 1683 # operation for the past three years, and in the City of Moose Jaw,
1679 1684 # Saskatchewan, for one year."
1680 1685
1681 1686 # From David Bryan via Tory Tronrud, Director/Curator,
1682 1687 # Thunder Bay Museum (2003-11-12):
1683 1688 # There is some suggestion, however, that, by-law or not, daylight
1684 1689 # savings time was being practiced in Fort William and Port Arthur
1685 1690 # before 1909.... [I]n 1910, the line between the Eastern and Central
1686 1691 # Time Zones was permanently moved about two hundred miles west to
1687 1692 # include the Thunder Bay area.... When Canada adopted daylight
1688 1693 # savings time in 1916, Fort William and Port Arthur, having done so
1689 1694 # already, did not change their clocks.... During the Second World
1690 1695 # War,... [t]he cities agreed to implement DST during the summer
1691 1696 # months for the remainder of the war years.
1692 1697
1693 1698 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1694 1699 Zone America/Toronto -5:17:32 - LMT 1895
1695 1700 -5:00 Canada E%sT 1919
1696 1701 -5:00 Toronto E%sT 1942 Feb 9 2:00s
1697 1702 -5:00 Canada E%sT 1946
1698 1703 -5:00 Toronto E%sT 1974
1699 1704 -5:00 Canada E%sT
1700 1705 Zone America/Thunder_Bay -5:57:00 - LMT 1895
1701 1706 -6:00 - CST 1910
1702 1707 -5:00 - EST 1942
1703 1708 -5:00 Canada E%sT 1970
1704 1709 -5:00 Toronto E%sT 1973
1705 1710 -5:00 - EST 1974
1706 1711 -5:00 Canada E%sT
1707 1712 Zone America/Nipigon -5:53:04 - LMT 1895
1708 1713 -5:00 Canada E%sT 1940 Sep 29
1709 1714 -5:00 1:00 EDT 1942 Feb 9 2:00s
1710 1715 -5:00 Canada E%sT
1711 1716 Zone America/Rainy_River -6:18:16 - LMT 1895
1712 1717 -6:00 Canada C%sT 1940 Sep 29
1713 1718 -6:00 1:00 CDT 1942 Feb 9 2:00s
1714 1719 -6:00 Canada C%sT
1715 1720 Zone America/Atikokan -6:06:28 - LMT 1895
1716 1721 -6:00 Canada C%sT 1940 Sep 29
1717 1722 -6:00 1:00 CDT 1942 Feb 9 2:00s
1718 1723 -6:00 Canada C%sT 1945 Sep 30 2:00
1719 1724 -5:00 - EST
1720 1725
1721 1726
1722 1727 # Manitoba
1723 1728
1724 1729 # From Rob Douglas (2006-04-06):
1725 1730 # the old Manitoba Time Act - as amended by Bill 2, assented to
1726 1731 # March 27, 1987 ... said ...
1727 1732 # "between two o'clock Central Standard Time in the morning of
1728 1733 # the first Sunday of April of each year and two o'clock Central
1729 1734 # Standard Time in the morning of the last Sunday of October next
1730 1735 # following, one hour in advance of Central Standard Time."...
1731 1736 # I believe that the English legislation [of the old time act] had
1732 1737 # been assented to (March 22, 1967)....
1733 1738 # Also, as far as I can tell, there was no order-in-council varying
1734 1739 # the time of Daylight Saving Time for 2005 and so the provisions of
1735 1740 # the 1987 version would apply - the changeover was at 2:00 Central
1736 1741 # Standard Time (i.e. not until 3:00 Central Daylight Time).
1737 1742
1738 1743 # From Paul Eggert (2006-04-10):
1739 1744 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
1740 1745 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume
1741 1746 # it was also 02:00s in 1966.
1742 1747
1743 1748 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1744 1749 Rule Winn 1916 only - Apr 23 0:00 1:00 D
1745 1750 Rule Winn 1916 only - Sep 17 0:00 0 S
1746 1751 Rule Winn 1918 only - Apr 14 2:00 1:00 D
1747 1752 Rule Winn 1918 only - Oct 27 2:00 0 S
1748 1753 Rule Winn 1937 only - May 16 2:00 1:00 D
1749 1754 Rule Winn 1937 only - Sep 26 2:00 0 S
1750 1755 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War
1751 1756 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace
1752 1757 Rule Winn 1945 only - Sep lastSun 2:00 0 S
1753 1758 Rule Winn 1946 only - May 12 2:00 1:00 D
1754 1759 Rule Winn 1946 only - Oct 13 2:00 0 S
1755 1760 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
1756 1761 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
1757 1762 Rule Winn 1950 only - May 1 2:00 1:00 D
1758 1763 Rule Winn 1950 only - Sep 30 2:00 0 S
1759 1764 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
1760 1765 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
1761 1766 Rule Winn 1959 only - Oct lastSun 2:00 0 S
1762 1767 Rule Winn 1960 only - Sep lastSun 2:00 0 S
1763 1768 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
1764 1769 Rule Winn 1963 only - Sep 22 2:00 0 S
1765 1770 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D
1766 1771 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S
1767 1772 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
1768 1773 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1769 1774 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
1770 1775 -6:00 Winn C%sT 2006
1771 1776 -6:00 Canada C%sT
1772 1777
1773 1778
1774 1779 # Saskatchewan
1775 1780
1776 1781 # From Mark Brader (2003-07-26):
1777 1782 # The first actual adoption of DST in Canada was at the municipal
1778 1783 # level. As the [Toronto] Star put it (1912-06-07), "While people
1779 1784 # elsewhere have long been talking of legislation to save daylight,
1780 1785 # the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1781 1786 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1782 1787 # presumably late evening, as below), and would run until "the end of
1783 1788 # the summer". The discrepancy between municipal time and railroad
1784 1789 # time was noted.
1785 1790
1786 1791 # From Paul Eggert (2003-07-27):
1787 1792 # Willett (1914-03) notes that DST "has been in operation ... in the
1788 1793 # City of Moose Jaw, Saskatchewan, for one year."
1789 1794
1790 1795 # From Paul Eggert (2006-03-22):
1791 1796 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1792 1797 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1793 1798 # Other western towns (e.g. Lloydminster) are like Edmonton.
1794 1799 # Matthews and Vincent (1998) write that Denare Beach and Creighton
1795 1800 # are like Winnipeg, in violation of Saskatchewan law.
1796 1801
1797 1802 # From W. Jones (1992-11-06):
1798 1803 # The. . .below is based on information I got from our law library, the
1799 1804 # provincial archives, and the provincial Community Services department.
1800 1805 # A precise history would require digging through newspaper archives, and
1801 1806 # since you didn't say what you wanted, I didn't bother.
1802 1807 #
1803 1808 # Saskatchewan is split by a time zone meridian (105W) and over the years
1804 1809 # the boundary became pretty ragged as communities near it reevaluated
1805 1810 # their affiliations in one direction or the other. In 1965 a provincial
1806 1811 # referendum favoured legislating common time practices.
1807 1812 #
1808 1813 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1809 1814 # Saskatchewan 1978) was proclaimed, and established that the eastern
1810 1815 # part of Saskatchewan would use CST year round, that districts in
1811 1816 # northwest Saskatchewan would by default follow CST but could opt to
1812 1817 # follow Mountain Time rules (thus 1 hour difference in the winter and
1813 1818 # zero in the summer), and that districts in southwest Saskatchewan would
1814 1819 # by default follow MT but could opt to follow CST.
1815 1820 #
1816 1821 # It took a few years for the dust to settle (I know one story of a town
1817 1822 # on one time zone having its school in another, such that a mom had to
1818 1823 # serve her family lunch in two shifts), but presently it seems that only
1819 1824 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT
1820 1825 # rules any more; all other districts appear to have used CST year round
1821 1826 # since sometime in the 1960s.
1822 1827
1823 1828 # From Chris Walton (2006-06-26):
1824 1829 # The Saskatchewan time act which was last updated in 1996 is about 30 pages
1825 1830 # long and rather painful to read.
1826 1831 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
1827 1832
1828 1833 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1829 1834 Rule Regina 1918 only - Apr 14 2:00 1:00 D
1830 1835 Rule Regina 1918 only - Oct 27 2:00 0 S
1831 1836 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
1832 1837 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
1833 1838 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
1834 1839 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
1835 1840 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
1836 1841 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
1837 1842 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War
1838 1843 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace
1839 1844 Rule Regina 1945 only - Sep lastSun 2:00 0 S
1840 1845 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
1841 1846 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
1842 1847 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D
1843 1848 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S
1844 1849 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D
1845 1850 Rule Regina 1959 only - Oct lastSun 2:00 0 S
1846 1851 #
1847 1852 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
1848 1853 Rule Swift 1957 only - Oct lastSun 2:00 0 S
1849 1854 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
1850 1855 Rule Swift 1959 only - Oct lastSun 2:00 0 S
1851 1856 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
1852 1857 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1853 1858 Zone America/Regina -6:58:36 - LMT 1905 Sep
1854 1859 -7:00 Regina M%sT 1960 Apr lastSun 2:00
1855 1860 -6:00 - CST
1856 1861 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
1857 1862 -7:00 Canada M%sT 1946 Apr lastSun 2:00
1858 1863 -7:00 Regina M%sT 1950
1859 1864 -7:00 Swift M%sT 1972 Apr lastSun 2:00
1860 1865 -6:00 - CST
1861 1866
1862 1867
1863 1868 # Alberta
1864 1869
1865 1870 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1866 1871 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
1867 1872 Rule Edm 1918 only - Oct 27 2:00 0 S
1868 1873 Rule Edm 1919 only - May 27 2:00 0 S
1869 1874 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
1870 1875 Rule Edm 1920 only - Oct lastSun 2:00 0 S
1871 1876 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
1872 1877 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War
1873 1878 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace
1874 1879 Rule Edm 1945 only - Sep lastSun 2:00 0 S
1875 1880 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
1876 1881 Rule Edm 1947 only - Sep lastSun 2:00 0 S
1877 1882 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
1878 1883 Rule Edm 1967 only - Oct lastSun 2:00 0 S
1879 1884 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
1880 1885 Rule Edm 1969 only - Oct lastSun 2:00 0 S
1881 1886 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
1882 1887 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S
1883 1888 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1884 1889 Zone America/Edmonton -7:33:52 - LMT 1906 Sep
1885 1890 -7:00 Edm M%sT 1987
1886 1891 -7:00 Canada M%sT
1887 1892
1888 1893
1889 1894 # British Columbia
1890 1895
1891 1896 # From Paul Eggert (2006-03-22):
1892 1897 # Shanks & Pottenger write that since 1970 most of this region has
1893 1898 # been like Vancouver.
1894 1899 # Dawson Creek uses MST. Much of east BC is like Edmonton.
1895 1900 # Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1896 1901
1897 1902 # It seems though that (re: Creston) is not entirely correct:
1898 1903
1899 1904 # From Chris Walton (2011-12-01):
1900 1905 # There are two areas within the Canadian province of British Columbia
1901 1906 # that do not currently observe daylight saving:
1902 1907 # a) The Creston Valley (includes the town of Creston and surrounding area)
1903 1908 # b) The eastern half of the Peace River Regional District
1904 1909 # (includes the cities of Dawson Creek and Fort St. John)
1905 1910
1906 1911 # Earlier this year I stumbled across a detailed article about the time
1907 1912 # keeping history of Creston; it was written by Tammy Hardwick who is the
1908 1913 # manager of the Creston & District Museum. The article was written in May 2009.
1909 1914 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1910 1915 # According to the article, Creston has not changed its clocks since June 1918.
1911 1916 # i.e. Creston has been stuck on UT-7 for 93 years.
1912 1917 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972.
1913 1918
1914 1919 # Unfortunately the exact date for the time change in June 1918 remains
1915 1920 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months
1916 1921 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just
1917 1922 # as plausible as any other date (in June). She also said that after writing
1918 1923 # the article she had discovered another time change in 1916; this is the
1919 1924 # subject of another article which she wrote in October 2010.
1920 1925 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56
1921 1926
1922 1927 # Here is a summary of the three clock change events in Creston's history:
1923 1928 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7)
1924 1929 # Exact date unknown
1925 1930 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8)
1926 1931 # Exact date in October unknown; Sunday October 1 is a reasonable guess.
1927 1932 # 3. June 1918: switch to Pacific Daylight Time (GMT-7)
1928 1933 # Exact date in June unknown; Sunday June 2 is a reasonable guess.
1929 1934 # note 1:
1930 1935 # On Oct 27/1918 when daylight saving ended in the rest of Canada,
1931 1936 # Creston did not change its clocks.
1932 1937 # note 2:
1933 1938 # During WWII when the Federal Government legislated a mandatory clock change,
1934 1939 # Creston did not oblige.
1935 1940 # note 3:
1936 1941 # There is no guarantee that Creston will remain on Mountain Standard Time
1937 1942 # (UTC-7) forever.
1938 1943 # The subject was debated at least once this year by the town Council.
1939 1944 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html
1940 1945
1941 1946 # During a period WWII, summer time (Daylight saying) was mandatory in Canada.
1942 1947 # In Creston, that was handled by shifting the area to PST (-8:00) then applying
1943 1948 # summer time to cause the offset to be -7:00, the same as it had been before
1944 1949 # the change. It can be argued that the timezone abbreviation during this
1945 1950 # period should be PDT rather than MST, but that doesn't seem important enough
1946 1951 # (to anyone) to further complicate the rules.
1947 1952
1948 1953 # The transition dates (and times) are guesses.
1949 1954
1950 1955 # From Matt Johnson (2015-09-21):
1951 1956 # Fort Nelson, BC, Canada will cancel DST this year. So while previously they
1952 1957 # were aligned with America/Vancouver, they're now aligned with
1953 1958 # America/Dawson_Creek.
1954 1959 # http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html
1955 1960 #
1956 1961 # From Tim Parenti (2015-09-23):
1957 1962 # This requires a new zone for the Northern Rockies Regional Municipality,
1958 1963 # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a
1959 1964 # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has
1960 1965 # been on MST (-0700) like Dawson Creek since it advanced its clocks on
1961 1966 # 2015-03-08.
1962 1967 #
1963 1968 # From Paul Eggert (2015-09-23):
1964 1969 # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
1965 1970
1966 1971 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1967 1972 Rule Vanc 1918 only - Apr 14 2:00 1:00 D
1968 1973 Rule Vanc 1918 only - Oct 27 2:00 0 S
1969 1974 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
1970 1975 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
1971 1976 Rule Vanc 1945 only - Sep 30 2:00 0 S
1972 1977 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
1973 1978 Rule Vanc 1946 only - Oct 13 2:00 0 S
1974 1979 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
1975 1980 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
1976 1981 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1977 1982 Zone America/Vancouver -8:12:28 - LMT 1884
1978 1983 -8:00 Vanc P%sT 1987
1979 1984 -8:00 Canada P%sT
1980 1985 Zone America/Dawson_Creek -8:00:56 - LMT 1884
1981 1986 -8:00 Canada P%sT 1947
1982 1987 -8:00 Vanc P%sT 1972 Aug 30 2:00
1983 1988 -7:00 - MST
1984 1989 Zone America/Fort_Nelson -8:10:47 - LMT 1884
1985 1990 -8:00 Vanc P%sT 1946
1986 1991 -8:00 - PST 1947
1987 1992 -8:00 Vanc P%sT 1987
1988 1993 -8:00 Canada P%sT 2015 Mar 8 2:00
1989 1994 -7:00 - MST
1990 1995 Zone America/Creston -7:46:04 - LMT 1884
1991 1996 -7:00 - MST 1916 Oct 1
1992 1997 -8:00 - PST 1918 Jun 2
1993 1998 -7:00 - MST
1994 1999
1995 2000 # Northwest Territories, Nunavut, Yukon
1996 2001
1997 2002 # From Paul Eggert (2006-03-22):
1998 2003 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
1999 2004 # Mathew Englander (1996-10-07) gives the following refs:
2000 2005 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
2001 2006 # c. 7 defines Yukon standard time as UTC-9....
2002 2007 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
2003 2008 # [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html]
2004 2009 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
2005 2010 # * O.I.C. 1980/02 established DST.
2006 2011 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
2007 2012
2008 2013 # From Brian Inglis (2015-04-14):
2009 2014 #
2010 2015 # I tried to trace the history of Yukon time and found the following
2011 2016 # regulations, giving the reference title and URL if found, regulation name,
2012 2017 # and relevant quote if available. Each regulation specifically revokes its
2013 2018 # predecessor. The final reference is to the current Interpretation Act
2014 2019 # authorizing and resulting from these regulatory changes.
2015 2020 #
2016 2021 # Only recent regulations were retrievable via Yukon government site search or
2017 2022 # index, and only some via Canadian legal sources. Other sources used include
2018 2023 # articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS
2019 2024 # Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and
2020 2025 # 1970 quoted below; each article includes current extracts from provincial
2021 2026 # and territorial ST and DST regulations at the end, summaries and details of
2022 2027 # standard times and daylight saving time at many locations across Canada,
2023 2028 # with time zone maps, tables and calculations for Canadian Sunrise, Sunset,
2024 2029 # and LMST; they also cover many countries and global locations, with a chart
2025 2030 # and table showing current Universal Time offsets, and may be useful as
2026 2031 # another source of information for 1970 and earlier.
2027 2032 #
2028 2033 # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
2029 2034 # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
2030 2035 # http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
2031 2036 # Yukon Interpretation Ordinance
2032 2037 # Yukon standard time is the local mean time at the one hundred and
2033 2038 # thirty-fifth meridian.
2034 2039 #
2035 2040 # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
2036 2041 # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
2037 2042 # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
2038 2043 # Yukon Interpretation Ordinance, 1955, Chap. 16.
2039 2044 #
2040 2045 # (1) Subject to this section, standard time shall be reckoned as nine
2041 2046 # hours behind Greenwich Time and called Yukon Standard Time.
2042 2047 #
2043 2048 # (2) Notwithstanding subsection (1), the Commissioner may make regulations
2044 2049 # varying the manner of reckoning standard time.
2045 2050 #
2046 2051 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
2047 2052 # http://? - no online source found
2048 2053 #
2049 2054 # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
2050 2055 # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
2051 2056 # http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
2052 2057 # Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
2053 2058 #
2054 2059 # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
2055 2060 # Territory on 27th January, 1966, is hereby revoked.
2056 2061 #
2057 2062 # 2. Yukon (East) Standard Time as defined by section 36 of the
2058 2063 # Interpretation Ordinance from and after mid-night on the 28th day of May,
2059 2064 # 1967 shall be reckoned in the same manner as Pacific Standard Time, that
2060 2065 # is to say, eight hours behind Greenwich Time in the area of the Yukon
2061 2066 # Territory lying east of the 138th degree longitude west.
2062 2067 #
2063 2068 # 3. In the remainder of the Territory, lying west of the 138th degree
2064 2069 # longitude west, Yukon (West) Standard Time shall be reckoned as nine
2065 2070 # hours behind Greenwich Time.
2066 2071 #
2067 2072 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
2068 2073 # https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
2069 2074 # C.O. 1973/214 INTERPRETATION ACT ...
2070 2075 #
2071 2076 # 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
2072 2077 # revoked.
2073 2078 #
2074 2079 # 2. Yukon Standard Time as defined by section 36 of the Interpretation
2075 2080 # Act from and after midnight on the twenty-eighth day of October, 1973
2076 2081 # shall be reckoned in the same manner as Pacific Standard Time, that is
2077 2082 # to say eight hours behind Greenwich Time.
2078 2083 #
2079 2084 # * O.I.C. 1980/02 INTERPRETATION ACT
2080 2085 # http://? - no online source found
2081 2086 #
2082 2087 # * Yukon Daylight Saving Time, YOIC 1987/56
2083 2088 # https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
2084 2089 # O.I.C. 1987/056 INTERPRETATION ACT ...
2085 2090 #
2086 2091 # In every year between
2087 2092 # (a) two o'clock in the morning in the first Sunday in April, and
2088 2093 # (b) two o'clock in the morning in the last Sunday in October,
2089 2094 # Standard Time shall be reckoned as seven hours behind Greenwich Time and
2090 2095 # called Yukon Daylight Saving Time.
2091 2096 # ...
2092 2097 # Dated ... 9th day of March, A.D., 1987.
2093 2098 #
2094 2099 # * Yukon Daylight Saving Time 2006, YOIC 2006/127
2095 2100 # https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
2096 2101 # O.I.C. 2006/127 INTERPRETATION ACT ...
2097 2102 #
2098 2103 # 1. In Yukon each year the time for general purposes shall be 7 hours
2099 2104 # behind Greenwich mean time during the period commencing at two o'clock
2100 2105 # in the forenoon on the second Sunday of March and ending at two o'clock
2101 2106 # in the forenoon on the first Sunday of November and shall be called
2102 2107 # Yukon Daylight Saving Time.
2103 2108 #
2104 2109 # 2. Order-in-Council 1987/56 is revoked.
2105 2110 #
2106 2111 # 3. This order comes into force January 1, 2007.
2107 2112 #
2108 2113 # * Interpretation Act, RSY 2002, c 125
2109 2114 # https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
2110 2115
2111 2116 # From Rives McDow (1999-09-04):
2112 2117 # Nunavut ... moved ... to incorporate the whole territory into one time zone.
2113 2118 # Nunavut moves to single time zone Oct. 31
2114 2119 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html
2115 2120 #
2116 2121 # From Antoine Leca (1999-09-06):
2117 2122 # We then need to create a new timezone for the Kitikmeot region of Nunavut
2118 2123 # to differentiate it from the Yellowknife region.
2119 2124
2120 2125 # From Paul Eggert (1999-09-20):
2121 2126 # Basic Facts: The New Territory
2122 2127 # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html
2123 2128 # (1999) reports that Pangnirtung operates on eastern time,
2124 2129 # and that Coral Harbour does not observe DST. We don't know when
2125 2130 # Pangnirtung switched to eastern time; we'll guess 1995.
2126 2131
2127 2132 # From Rives McDow (1999-11-08):
2128 2133 # On October 31, when the rest of Nunavut went to Central time,
2129 2134 # Pangnirtung wobbled. Here is the result of their wobble:
2130 2135 #
2131 2136 # The following businesses and organizations in Pangnirtung use Central Time:
2132 2137 #
2133 2138 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
2134 2139 # Eastern Arctic National Parks, A & D Specialist
2135 2140 #
2136 2141 # The following businesses and organizations in Pangnirtung use Eastern Time:
2137 2142 #
2138 2143 # Hamlet office, All other businesses, Both schools, Airport operator
2139 2144 #
2140 2145 # This has made for an interesting situation there, which warranted the news.
2141 2146 # No one there that I spoke with seems concerned, or has plans to
2142 2147 # change the local methods of keeping time, as it evidently does not
2143 2148 # really interfere with any activities or make things difficult locally.
2144 2149 # They plan to celebrate New Year's turn-over twice, one hour apart,
2145 2150 # so it appears that the situation will last at least that long.
2146 2151 # The Nunavut Intergovernmental Affairs hopes that they will "come to
2147 2152 # their senses", but the locals evidently don't see any problem with
2148 2153 # the current state of affairs.
2149 2154
2150 2155 # From Michaela Rodrigue, writing in the
2151 2156 # Nunatsiaq News (1999-11-19):
2152 2157 # http://www.nunatsiaqonline.ca/archives/nunavut991130/nvt91119_17.html
2153 2158 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
2154 2159 # central - or Nunavut time - for government offices, and eastern time
2155 2160 # for municipal offices and schools.... Igloolik [was similar but then]
2156 2161 # made the switch to central time on Saturday, Nov. 6.
2157 2162
2158 2163 # From Paul Eggert (2000-10-02):
2159 2164 # Matthews and Vincent (1998) say the following, but we lack histories
2160 2165 # for these potential new Zones.
2161 2166 #
2162 2167 # The Canadian Forces station at Alert uses Eastern Time while the
2163 2168 # handful of residents at the Eureka weather station [in the Central
2164 2169 # zone] skip daylight savings. Baffin Island, which is crossed by the
2165 2170 # Central, Eastern and Atlantic Time zones only uses Eastern Time.
2166 2171 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
2167 2172 # Central Time and Southampton Island [in the Central zone] is not
2168 2173 # required to use daylight savings.
2169 2174
2170 2175 # From <http://www.nunatsiaqonline.ca/archives/nunavut001130/nvt21110_02.html>
2171 2176 # Nunavut now has two time zones (2000-11-10):
2172 2177 # The Nunavut government would allow its employees in Kugluktuk and
2173 2178 # Cambridge Bay to operate on central time year-round, putting them
2174 2179 # one hour behind the rest of Nunavut for six months during the winter.
2175 2180 # At the end of October the two communities had rebelled against
2176 2181 # Nunavut's unified time zone, refusing to shift to eastern time with
2177 2182 # the rest of the territory for the winter. Cambridge Bay remained on
2178 2183 # central time, while Kugluktuk, even farther west, reverted to
2179 2184 # mountain time, which they had used before the advent of Nunavut's
2180 2185 # unified time zone in 1999.
2181 2186 #
2182 2187 # From Rives McDow (2001-01-20), quoting the Nunavut government:
2183 2188 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
2184 2189
2185 2190 # From Paul Eggert (2000-12-04):
2186 2191 # Let's just keep track of the official times for now.
2187 2192
2188 2193 # From Rives McDow (2001-03-07):
2189 2194 # The premier of Nunavut has issued a ministerial statement advising
2190 2195 # that effective 2001-04-01, the territory of Nunavut will revert
2191 2196 # back to three time zones (mountain, central, and eastern). Of the
2192 2197 # cities in Nunavut, Coral Harbor is the only one that I know of that
2193 2198 # has said it will not observe dst, staying on EST year round. I'm
2194 2199 # checking for more info, and will get back to you if I come up with
2195 2200 # more.
2196 2201 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
2197 2202
2198 2203 # From Gwillim Law (2005-05-21):
2199 2204 # According to ...
2200 2205 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
2201 2206 # (from a 1998 Canadian Geographic article), the de facto and de jure time
2202 2207 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
2203 2208 # round. Using Google, it's easy to find other websites that confirm this.
2204 2209 # I wasn't able to find how far back this time regimen goes, but since it
2205 2210 # predates the creation of Nunavut, it probably goes back many years....
2206 2211 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
2207 2212 #
2208 2213 # From Paul Eggert (2014-10-17):
2209 2214 # For lack of better information, assume that Southampton Island observed
2210 2215 # daylight saving only during wartime. Gwillim Law's email also
2211 2216 # mentioned maps now maintained by National Research Council Canada;
2212 2217 # see above for an up-to-date link.
2213 2218
2214 2219 # From Chris Walton (2007-03-01):
2215 2220 # ... the community of Resolute (located on Cornwallis Island in
2216 2221 # Nunavut) moved from Central Time to Eastern Time last November.
2217 2222 # Basically the community did not change its clocks at the end of
2218 2223 # daylight saving....
2219 2224 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
2220 2225
2221 2226 # From Chris Walton (2011-03-21):
2222 2227 # Back in 2007 I initiated the creation of a new "zone file" for Resolute
2223 2228 # Bay. Resolute Bay is a small community located about 900km north of
2224 2229 # the Arctic Circle. The zone file was required because Resolute Bay had
2225 2230 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2226 2231 #
2227 2232 # According to new information which I received last week, Resolute Bay
2228 2233 # went back to using UTC-6 in the winter of 2007-2008...
2229 2234 #
2230 2235 # On March 11/2007 most of Canada went onto daylight saving. On March
2231 2236 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
2232 2237 # talked to somebody that was both knowledgeable and helpful. I was able
2233 2238 # to confirm that Resolute Bay was still operating on UTC-5. It was
2234 2239 # explained to me that Resolute Bay had been on the Eastern Time zone
2235 2240 # (EST) in the winter, and was now back on the Central Time zone (CDT).
2236 2241 # i.e. the time zone had changed twice in the last year but the clocks
2237 2242 # had not moved. The residents had to know which time zone they were in
2238 2243 # so they could follow the correct TV schedule...
2239 2244 #
2240 2245 # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I
2241 2246 # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature
2242 2247 # of the phone call, I decided to seek out an alternate source of
2243 2248 # information. I found an e-mail address for somebody by the name of
2244 2249 # Stephanie Adams whose job was listed as "Inns North Support Officer for
2245 2250 # Arctic Co-operatives." I was under the impression that Stephanie lived
2246 2251 # and worked in Resolute Bay...
2247 2252 #
2248 2253 # On March 14/2011 I phoned the hamlet office again. I was told that
2249 2254 # Resolute Bay had been using Central Standard Time over the winter of
2250 2255 # 2010-2011 and that the clocks had therefore been moved one hour ahead
2251 2256 # on March 13/2011. The person I talked to was aware that Resolute Bay
2252 2257 # had previously experimented with Eastern Standard Time but he could not
2253 2258 # tell me when the practice had stopped.
2254 2259 #
2255 2260 # On March 17/2011 I searched the Web to find an e-mail address of
2256 2261 # somebody that might be able to tell me exactly when Resolute Bay went
2257 2262 # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz
2258 2263 # used to be the mayor of Resolute Bay and he apparently owns half the
2259 2264 # businesses including "South Camp Inn." This website has some info on
2260 2265 # Aziz:
2261 2266 # http://www.uphere.ca/node/493
2262 2267 #
2263 2268 # I sent Aziz an e-mail asking when Resolute Bay had stopped using
2264 2269 # Eastern Standard Time.
2265 2270 #
2266 2271 # Aziz responded quickly with this: "hi, The time was not changed for the
2267 2272 # 1 year only, the following year, the community went back to the old way
2268 2273 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in
2269 2274 # the winter Zulu plus 6 hrs"
2270 2275 #
2271 2276 # This of course conflicted with everything I had ascertained in November 2008.
2272 2277 #
2273 2278 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz
2274 2279 # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You
2275 2280 # may want to check with the weather office in Resolute Bay or do a
2276 2281 # search on the weather through Env. Canada. web site"
2277 2282 #
2278 2283 # If I had realized the Stephanie did not live in Resolute Bay I would
2279 2284 # never have contacted her. I now believe that all the information I
2280 2285 # obtained in November 2008 should be ignored...
2281 2286 # I apologize for reporting incorrect information in 2008.
2282 2287
2283 2288 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2284 2289 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
2285 2290 Rule NT_YK 1918 only - Oct 27 2:00 0 S
2286 2291 Rule NT_YK 1919 only - May 25 2:00 1:00 D
2287 2292 Rule NT_YK 1919 only - Nov 1 0:00 0 S
2288 2293 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
2289 2294 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
2290 2295 Rule NT_YK 1945 only - Sep 30 2:00 0 S
2291 2296 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
2292 2297 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
2293 2298 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
2294 2299 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S
2295 2300 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
2296 2301 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2297 2302 # aka Panniqtuuq
2298 2303 Zone America/Pangnirtung 0 - -00 1921 # trading post est.
2299 2304 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
2300 2305 -5:00 Canada E%sT 1999 Oct 31 2:00
2301 2306 -6:00 Canada C%sT 2000 Oct 29 2:00
2302 2307 -5:00 Canada E%sT
2303 2308 # formerly Frobisher Bay
2304 2309 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est.
2305 2310 -5:00 NT_YK E%sT 1999 Oct 31 2:00
2306 2311 -6:00 Canada C%sT 2000 Oct 29 2:00
2307 2312 -5:00 Canada E%sT
2308 2313 # aka Qausuittuq
2309 2314 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded
2310 2315 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2311 2316 -5:00 - EST 2001 Apr 1 3:00
2312 2317 -6:00 Canada C%sT 2006 Oct 29 2:00
2313 2318 -5:00 - EST 2007 Mar 11 3:00
2314 2319 -6:00 Canada C%sT
2315 2320 # aka Kangiqiniq
2316 2321 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded
2317 2322 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2318 2323 -5:00 - EST 2001 Apr 1 3:00
2319 2324 -6:00 Canada C%sT
2320 2325 # aka Iqaluktuuttiaq
2321 2326 Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.?
2322 2327 -7:00 NT_YK M%sT 1999 Oct 31 2:00
2323 2328 -6:00 Canada C%sT 2000 Oct 29 2:00
2324 2329 -5:00 - EST 2000 Nov 5 0:00
2325 2330 -6:00 - CST 2001 Apr 1 3:00
2326 2331 -7:00 Canada M%sT
2327 2332 Zone America/Yellowknife 0 - -00 1935 # Yellowknife founded?
2328 2333 -7:00 NT_YK M%sT 1980
2329 2334 -7:00 Canada M%sT
2330 2335 Zone America/Inuvik 0 - -00 1953 # Inuvik founded
2331 2336 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
2332 2337 -7:00 NT_YK M%sT 1980
2333 2338 -7:00 Canada M%sT
2334 2339 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
2335 2340 -9:00 NT_YK Y%sT 1967 May 28 0:00
2336 2341 -8:00 NT_YK P%sT 1980
2337 2342 -8:00 Canada P%sT
2338 2343 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
2339 2344 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
2340 2345 -8:00 NT_YK P%sT 1980
2341 2346 -8:00 Canada P%sT
2342 2347
2343 2348
2344 2349 ###############################################################################
2345 2350
2346 2351 # Mexico
2347 2352
2348 2353 # From Paul Eggert (2014-12-07):
2349 2354 # The Investigation and Analysis Service of the
2350 2355 # Mexican Library of Congress (MLoC) has published a
2351 2356 # history of Mexican local time (in Spanish)
2352 2357 # http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm
2353 2358 #
2354 2359 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
2355 2360 # (In all cases we go with the MLoC.)
2356 2361 # S&P report that Baja was at -8:00 in 1922/1923.
2357 2362 # S&P say the 1930 transition in Baja was 1930-11-16.
2358 2363 # S&P report no DST during summer 1931.
2359 2364 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
2360 2365
2361 2366 # From Gwillim Law (2001-02-20):
2362 2367 # There are some other discrepancies between the Decrees page and the
2363 2368 # tz database. I think they can best be explained by supposing that
2364 2369 # the researchers who prepared the Decrees page failed to find some of
2365 2370 # the relevant documents.
2366 2371
2367 2372 # From Alan Perry (1996-02-15):
2368 2373 # A guy from our Mexico subsidiary finally found the Presidential Decree
2369 2374 # outlining the timezone changes in Mexico.
2370 2375 #
2371 2376 # ------------- Begin Forwarded Message -------------
2372 2377 #
2373 2378 # I finally got my hands on the Official Presidential Decree that sets up the
2374 2379 # rules for the DST changes. The rules are:
2375 2380 #
2376 2381 # 1. The country is divided in 3 timezones:
2377 2382 # - Baja California Norte (the Mexico/BajaNorte TZ)
2378 2383 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
2379 2384 # - The rest of the country (the Mexico/General TZ)
2380 2385 #
2381 2386 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
2382 2387 # at 2:00 AM, the times in each zone are as follows:
2383 2388 # BajaNorte: GMT+7
2384 2389 # BajaSur: GMT+6
2385 2390 # General: GMT+5
2386 2391 #
2387 2392 # 3. The rest of the year, the times are as follows:
2388 2393 # BajaNorte: GMT+8
2389 2394 # BajaSur: GMT+7
2390 2395 # General: GMT+6
2391 2396 #
2392 2397 # The Decree was published in Mexico's Official Newspaper on January 4th.
2393 2398 #
2394 2399 # -------------- End Forwarded Message --------------
2395 2400 # From Paul Eggert (1996-06-12):
2396 2401 # For an English translation of the decree, see
2397 2402 # "Diario Oficial: Time Zone Changeover" (1996-01-04).
2398 2403 # http://mexico-travel.com/extra/timezone_eng.html
2399 2404
2400 2405 # From Rives McDow (1998-10-08):
2401 2406 # The State of Quintana Roo has reverted back to central STD and DST times
2402 2407 # (i.e. UTC -0600 and -0500 as of 1998-08-02).
2403 2408
2404 2409 # From Rives McDow (2000-01-10):
2405 2410 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
2406 2411 # zone 5 hours from the International Date Line, and will not observe daylight
2407 2412 # savings time so as to stay on the same time zone as the southern part of
2408 2413 # Arizona year round.
2409 2414
2410 2415 # From Jesper Nørgaard, translating
2411 2416 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
2412 2417 # In Oaxaca, the 55.000 teachers from the Section 22 of the National
2413 2418 # Syndicate of Education Workers, refuse to apply daylight saving each
2414 2419 # year, so that the more than 10,000 schools work at normal hour the
2415 2420 # whole year.
2416 2421
2417 2422 # From Gwillim Law (2001-01-19):
2418 2423 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
2419 2424 # (translated):...
2420 2425 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
2421 2426 # that Summer Time will be reduced from seven to five months, starting
2422 2427 # this year....
2423 2428 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
2424 2429 # [translated], says "summer time will ... take effect on the first Sunday
2425 2430 # in May, and end on the last Sunday of September.
2426 2431
2427 2432 # From Arthur David Olson (2001-01-25):
2428 2433 # The 2001-01-24 traditional Washington Post contained the page one
2429 2434 # story "Timely Issue Divides Mexicans."...
2430 2435 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2431 2436 # ... Mexico City Mayor López Obrador "...is threatening to keep
2432 2437 # Mexico City and its 20 million residents on a different time than
2433 2438 # the rest of the country..." In particular, López Obrador would abolish
2434 2439 # observation of Daylight Saving Time.
2435 2440
2436 2441 # Official statute published by the Energy Department
2437 2442 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
2438 2443 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2439 2444 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03).
2440 2445
2441 2446 # From Paul Eggert (2001-03-03):
2442 2447 #
2443 2448 # http://www.latimes.com/news/nation/20010303/t000018766.html
2444 2449 # James F. Smith writes in today's LA Times
2445 2450 # * Sonora will continue to observe standard time.
2446 2451 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that
2447 2452 # the Federal District will not adopt DST.
2448 2453 # * 4 of 16 district leaders announced they'll ignore the decree.
2449 2454 # * The decree does not affect federal-controlled facilities including
2450 2455 # the airport, banks, hospitals, and schools.
2451 2456 #
2452 2457 # For now we'll assume that the Federal District will bow to federal rules.
2453 2458
2454 2459 # From Jesper Nørgaard (2001-04-01):
2455 2460 # I found some references to the Mexican application of daylight
2456 2461 # saving, which modifies what I had already sent you, stating earlier
2457 2462 # that a number of northern Mexican states would go on daylight
2458 2463 # saving. The modification reverts this to only cover Baja California
2459 2464 # (Norte), while all other states (except Sonora, who has no daylight
2460 2465 # saving all year) will follow the original decree of president
2461 2466 # Vicente Fox, starting daylight saving May 6, 2001 and ending
2462 2467 # September 30, 2001.
2463 2468 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>
2464 2469 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
2465 2470
2466 2471 # From Reuters (2001-09-04):
2467 2472 # Mexico's Supreme Court on Tuesday declared that daylight savings was
2468 2473 # unconstitutional in Mexico City, creating the possibility the
2469 2474 # capital will be in a different time zone from the rest of the nation
2470 2475 # next year.... The Supreme Court's ruling takes effect at 2:00
2471 2476 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
2472 2477 # standard time. "This is so residents of the Federal District are not
2473 2478 # subject to unexpected time changes," a statement from the court said.
2474 2479
2475 2480 # From Jesper Nørgaard Welen (2002-03-12):
2476 2481 # ... consulting my local grocery store(!) and my coworkers, they all insisted
2477 2482 # that a new decision had been made to reinstate US style DST in Mexico....
2478 2483 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
2479 2484 # confirms this. Sonora as usual is the only state where DST is not applied.
2480 2485
2481 2486 # From Steffen Thorsen (2009-12-28):
2482 2487 #
2483 2488 # Steffen Thorsen wrote:
2484 2489 # > Mexico's House of Representatives has approved a proposal for northern
2485 2490 # > Mexico's border cities to share the same daylight saving schedule as
2486 2491 # > the United States.
2487 2492 # Now this has passed both the Congress and the Senate, so starting from
2488 2493 # 2010, some border regions will be the same:
2489 2494 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
2490 2495 # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939
2491 2496 # (Spanish)
2492 2497 #
2493 2498 # Could not find the new law text, but the proposed law text changes are here:
2494 2499 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2495 2500 # (Gaceta Parlamentaria)
2496 2501 #
2497 2502 # There is also a list of the votes here:
2498 2503 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2499 2504 #
2500 2505 # Our page:
2501 2506 # https://www.timeanddate.com/news/time/north-mexico-dst-change.html
2502 2507
2503 2508 # From Arthur David Olson (2010-01-20):
2504 2509 # The page
2505 2510 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2506 2511 # includes this text:
2507 2512 # En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2508 2513 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila;
2509 2514 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en
2510 2515 # Tamaulipas, la aplicación de este horario estacional surtirá efecto
2511 2516 # desde las dos horas del segundo domingo de marzo y concluirá a las dos
2512 2517 # horas del primer domingo de noviembre.
2513 2518 # En los municipios fronterizos que se encuentren ubicados en la franja
2514 2519 # fronteriza norte en el territorio comprendido entre la línea
2515 2520 # internacional y la línea paralela ubicada a una distancia de veinte
2516 2521 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el
2517 2522 # interior del país, la aplicación de este horario estacional surtirá
2518 2523 # efecto desde las dos horas del segundo domingo de marzo y concluirá a
2519 2524 # las dos horas del primer domingo de noviembre.
2520 2525
2521 2526 # From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
2522 2527 # The Mexican state of Quintana Roo will likely change to EST in 2015.
2523 2528 #
2524 2529 # http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
2525 2530 # "With this change, the time conflict that has existed between the municipios
2526 2531 # of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an
2527 2532 # end. The latter declared itself in rebellion 15 years ago when a time change
2528 2533 # was initiated in Mexico, and since then it has refused to change its time
2529 2534 # zone along with the rest of the country."
2530 2535 #
2531 2536 # From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
2532 2537 # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html
2533 2538 # "...the new time zone will come into effect at two o'clock on the first Sunday
2534 2539 # of February, when we will have to advance the clock one hour from its current
2535 2540 # time..."
2536 2541 # Also, the new zone will not use DST.
2537 2542 #
2538 2543 # From Carlos Raúl Perasso (2015-02-02):
2539 2544 # The decree that modifies the Mexican Hour System Law has finally
2540 2545 # been published at the Diario Oficial de la Federación
2541 2546 # http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015
2542 2547 # It establishes 5 zones for Mexico:
2543 2548 # 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
2544 2549 # includes most of Mexico, excluding what's mentioned below.
2545 2550 # 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the
2546 2551 # states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía
2547 2552 # de Banderas which lies in Central Zone); Sinaloa and Sonora.
2548 2553 # 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
2549 2554 # state of Baja California.
2550 2555 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2551 2556 # of Quintana Roo.
2552 2557 # 5- The islands, reefs and keys shall take their timezone from the
2553 2558 # longitude they are located at.
2554 2559
2555 2560 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2556 2561 Rule Mexico 1939 only - Feb 5 0:00 1:00 D
2557 2562 Rule Mexico 1939 only - Jun 25 0:00 0 S
2558 2563 Rule Mexico 1940 only - Dec 9 0:00 1:00 D
2559 2564 Rule Mexico 1941 only - Apr 1 0:00 0 S
2560 2565 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
2561 2566 Rule Mexico 1944 only - May 1 0:00 0 S
2562 2567 Rule Mexico 1950 only - Feb 12 0:00 1:00 D
2563 2568 Rule Mexico 1950 only - Jul 30 0:00 0 S
2564 2569 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2565 2570 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2566 2571 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2567 2572 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2568 2573 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
2569 2574 Rule Mexico 2002 max - Oct lastSun 2:00 0 S
2570 2575 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2571 2576 # Quintana Roo; represented by Cancún
2572 2577 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
2573 2578 -6:00 - CST 1981 Dec 23
2574 2579 -5:00 Mexico E%sT 1998 Aug 2 2:00
2575 2580 -6:00 Mexico C%sT 2015 Feb 1 2:00
2576 2581 -5:00 - EST
2577 2582 # Campeche, Yucatán; represented by Mérida
2578 2583 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
2579 2584 -6:00 - CST 1981 Dec 23
2580 2585 -5:00 - EST 1982 Dec 2
2581 2586 -6:00 Mexico C%sT
2582 2587 # Coahuila, Nuevo León, Tamaulipas (near US border)
2583 2588 # This includes the following municipalities:
2584 2589 # in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava,
2585 2590 # Guerrero, Hidalgo.
2586 2591 # in Nuevo León: Anáhuac, Los Aldama.
2587 2592 # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo,
2588 2593 # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros.
2589 2594 # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal,
2590 2595 # 2016-03-12
2591 2596 # http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza
2592 2597 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00
2593 2598 -6:00 - CST 1988
2594 2599 -6:00 US C%sT 1989
2595 2600 -6:00 Mexico C%sT 2010
2596 2601 -6:00 US C%sT
2597 2602 # Durango; Coahuila, Nuevo León, Tamaulipas (away from US border)
2598 2603 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
2599 2604 -6:00 - CST 1988
2600 2605 -6:00 US C%sT 1989
2601 2606 -6:00 Mexico C%sT
2602 2607 # Central Mexico
2603 2608 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
2604 2609 -7:00 - MST 1927 Jun 10 23:00
2605 2610 -6:00 - CST 1930 Nov 15
2606 2611 -7:00 - MST 1931 May 1 23:00
2607 2612 -6:00 - CST 1931 Oct
2608 2613 -7:00 - MST 1932 Apr 1
2609 2614 -6:00 Mexico C%sT 2001 Sep 30 2:00
2610 2615 -6:00 - CST 2002 Feb 20
2611 2616 -6:00 Mexico C%sT
2612 2617 # Chihuahua (near US border)
2613 2618 # This includes the municipalities of Janos, Ascensión, Juárez, Guadalupe,
2614 2619 # Práxedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides.
2615 2620 # (See the 2016-03-12 El Universal source mentioned above.)
2616 2621 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20
2617 2622 -7:00 - MST 1927 Jun 10 23:00
2618 2623 -6:00 - CST 1930 Nov 15
2619 2624 -7:00 - MST 1931 May 1 23:00
2620 2625 -6:00 - CST 1931 Oct
2621 2626 -7:00 - MST 1932 Apr 1
2622 2627 -6:00 - CST 1996
2623 2628 -6:00 Mexico C%sT 1998
2624 2629 -6:00 - CST 1998 Apr Sun>=1 3:00
2625 2630 -7:00 Mexico M%sT 2010
2626 2631 -7:00 US M%sT
2627 2632 # Chihuahua (away from US border)
2628 2633 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
2629 2634 -7:00 - MST 1927 Jun 10 23:00
2630 2635 -6:00 - CST 1930 Nov 15
2631 2636 -7:00 - MST 1931 May 1 23:00
2632 2637 -6:00 - CST 1931 Oct
2633 2638 -7:00 - MST 1932 Apr 1
2634 2639 -6:00 - CST 1996
2635 2640 -6:00 Mexico C%sT 1998
2636 2641 -6:00 - CST 1998 Apr Sun>=1 3:00
2637 2642 -7:00 Mexico M%sT
2638 2643 # Sonora
2639 2644 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08
2640 2645 -7:00 - MST 1927 Jun 10 23:00
2641 2646 -6:00 - CST 1930 Nov 15
2642 2647 -7:00 - MST 1931 May 1 23:00
2643 2648 -6:00 - CST 1931 Oct
2644 2649 -7:00 - MST 1932 Apr 1
2645 2650 -6:00 - CST 1942 Apr 24
2646 2651 -7:00 - MST 1949 Jan 14
2647 2652 -8:00 - PST 1970
2648 2653 -7:00 Mexico M%sT 1999
2649 2654 -7:00 - MST
2650 2655
2651 2656 # From Alexander Krivenyshev (2010-04-21):
2652 2657 # According to news, Bahía de Banderas (Mexican state of Nayarit)
2653 2658 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
2654 2659 # share the same time zone as nearby city Puerto Vallarta, Jalisco).
2655 2660 #
2656 2661 # (Spanish)
2657 2662 # Bahía de Banderas homologa su horario al del centro del
2658 2663 # país, a partir de este domingo
2659 2664 # http://www.nayarit.gob.mx/notes.asp?id=20748
2660 2665 #
2661 2666 # Bahía de Banderas homologa su horario con el del Centro del
2662 2667 # País
2663 2668 # http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50
2664 2669 #
2665 2670 # (English)
2666 2671 # Puerto Vallarta and Bahía de Banderas: One Time Zone
2667 2672 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml
2668 2673 # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html
2669 2674 #
2670 2675 # "Mexico's Senate approved the amendments to the Mexican Schedule System that
2671 2676 # will allow Bahía de Banderas and Puerto Vallarta to share the same time
2672 2677 # zone ..."
2673 2678 # Baja California Sur, Nayarit, Sinaloa
2674 2679
2675 2680 # From Arthur David Olson (2010-05-01):
2676 2681 # Use "Bahia_Banderas" to keep the name to fourteen characters.
2677 2682
2678 2683 # Mazatlán
2679 2684 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
2680 2685 -7:00 - MST 1927 Jun 10 23:00
2681 2686 -6:00 - CST 1930 Nov 15
2682 2687 -7:00 - MST 1931 May 1 23:00
2683 2688 -6:00 - CST 1931 Oct
2684 2689 -7:00 - MST 1932 Apr 1
2685 2690 -6:00 - CST 1942 Apr 24
2686 2691 -7:00 - MST 1949 Jan 14
2687 2692 -8:00 - PST 1970
2688 2693 -7:00 Mexico M%sT
2689 2694
2690 2695 # Bahía de Banderas
2691 2696 Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00
2692 2697 -7:00 - MST 1927 Jun 10 23:00
2693 2698 -6:00 - CST 1930 Nov 15
2694 2699 -7:00 - MST 1931 May 1 23:00
2695 2700 -6:00 - CST 1931 Oct
2696 2701 -7:00 - MST 1932 Apr 1
2697 2702 -6:00 - CST 1942 Apr 24
2698 2703 -7:00 - MST 1949 Jan 14
2699 2704 -8:00 - PST 1970
2700 2705 -7:00 Mexico M%sT 2010 Apr 4 2:00
2701 2706 -6:00 Mexico C%sT
2702 2707
2703 2708 # Baja California
2704 2709 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
2705 2710 -7:00 - MST 1924
2706 2711 -8:00 - PST 1927 Jun 10 23:00
2707 2712 -7:00 - MST 1930 Nov 15
2708 2713 -8:00 - PST 1931 Apr 1
2709 2714 -8:00 1:00 PDT 1931 Sep 30
2710 2715 -8:00 - PST 1942 Apr 24
2711 2716 -8:00 1:00 PWT 1945 Aug 14 23:00u
2712 2717 -8:00 1:00 PPT 1945 Nov 12 # Peace
2713 2718 -8:00 - PST 1948 Apr 5
2714 2719 -8:00 1:00 PDT 1949 Jan 14
2715 2720 -8:00 - PST 1954
2716 2721 -8:00 CA P%sT 1961
2717 2722 -8:00 - PST 1976
2718 2723 -8:00 US P%sT 1996
2719 2724 -8:00 Mexico P%sT 2001
2720 2725 -8:00 US P%sT 2002 Feb 20
2721 2726 -8:00 Mexico P%sT 2010
2722 2727 -8:00 US P%sT
2723 2728 # From Paul Eggert (2006-03-22):
2724 2729 # Formerly there was an America/Ensenada zone, which differed from
2725 2730 # America/Tijuana only in that it did not observe DST from 1976
2726 2731 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say
2727 2732 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports
2728 2733 # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and
2729 2734 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
2730 2735 # DST-observance was a town-by-town matter back then. This concerns
2731 2736 # data after 1970 so most likely there should be at least one Zone
2732 2737 # other than America/Tijuana for Baja, but it's not clear yet what its
2733 2738 # name or contents should be.
2734 2739 #
2735 2740 # From Paul Eggert (2015-10-08):
2736 2741 # Formerly there was an America/Santa_Isabel zone, but this appears to
2737 2742 # have come from a misreading of
2738 2743 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2739 2744 # It has been moved to the 'backward' file.
2740 2745 #
2741 2746 #
2742 2747 # Revillagigedo Is
2743 2748 # no information
2744 2749
2745 2750 ###############################################################################
2746 2751
2747 2752 # Anguilla
2748 2753 # Antigua and Barbuda
2749 2754 # See America/Port_of_Spain.
2750 2755
2751 2756 # Bahamas
2752 2757 #
2753 2758 # For 1899 Milne gives -5:09:29.5; round that.
2754 2759 #
2755 2760 # From Sue Williams (2006-12-07):
2756 2761 # The Bahamas announced about a month ago that they plan to change their DST
2757 2762 # rules to sync with the U.S. starting in 2007....
2758 2763 # http://www.jonesbahamas.com/?c=45&a=10412
2759 2764
2760 2765 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2761 2766 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S
2762 2767 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D
2763 2768 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2764 2769 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2
2765 2770 -5:00 Bahamas E%sT 1976
2766 2771 -5:00 US E%sT
2767 2772
2768 2773 # Barbados
2769 2774
2770 2775 # For 1899 Milne gives -3:58:29.2; round that.
2771 2776
2772 2777 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2773 2778 Rule Barb 1977 only - Jun 12 2:00 1:00 D
2774 2779 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
2775 2780 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
2776 2781 Rule Barb 1979 only - Sep 30 2:00 0 S
2777 2782 Rule Barb 1980 only - Sep 25 2:00 0 S
2778 2783 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2779 2784 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown
2780 2785 -3:58:29 - BMT 1932 # Bridgetown Mean Time
2781 2786 -4:00 Barb A%sT
2782 2787
2783 2788 # Belize
2784 2789 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2785 2790 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2786 2791 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530
2787 2792 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST
2788 2793 Rule Belize 1973 only - Dec 5 0:00 1:00 CDT
2789 2794 Rule Belize 1974 only - Feb 9 0:00 0 CST
2790 2795 Rule Belize 1982 only - Dec 18 0:00 1:00 CDT
2791 2796 Rule Belize 1983 only - Feb 12 0:00 0 CST
2792 2797 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2793 2798 Zone America/Belize -5:52:48 - LMT 1912 Apr
2794 2799 -6:00 Belize %s
2795 2800
2796 2801 # Bermuda
2797 2802
2798 2803 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2799 2804 # Bermuda dockyard, Ireland I; round that.
2800 2805
2801 2806 # From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2802 2807
2803 2808 # Next year, however, clocks in the US will go forward on the second Sunday
2804 2809 # in March, until the first Sunday in November. And, after the Time Zone
2805 2810 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2806 2811 # Friday, the same thing will happen in Bermuda.
2807 2812 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2808 2813
2809 2814 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2810 2815 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton
2811 2816 -4:00 - AST 1974 Apr 28 2:00
2812 2817 -4:00 Canada A%sT 1976
2813 2818 -4:00 US A%sT
2814 2819
2815 2820 # Cayman Is
2816 2821 # See America/Panama.
2817 2822
2818 2823 # Costa Rica
2819 2824
2820 2825 # Milne gives -5:36:13.3 as San José mean time; round to nearest.
2821 2826
2822 2827 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2823 2828 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
2824 2829 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
2825 2830 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
2826 2831 # IATA SSIM (1991-09) says the following was at 1:00;
2827 2832 # go with Shanks & Pottenger.
2828 2833 Rule CR 1991 only - Jul 1 0:00 0 S
2829 2834 Rule CR 1992 only - Mar 15 0:00 0 S
2830 2835 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
2831 2836 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2832 2837 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José
2833 2838 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time
2834 2839 -6:00 CR C%sT
2835 2840 # Coco
2836 2841 # no information; probably like America/Costa_Rica
2837 2842
2838 2843 # Cuba
2839 2844
2840 2845 # From Paul Eggert (2013-02-21):
2841 2846 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
2842 2847 # for the port, and -5:30 for meteorological observations.
2843 2848 # For now, stick with Shanks & Pottenger.
2844 2849
2845 2850 # From Arthur David Olson (1999-03-29):
2846 2851 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2847 2852 # the Cuban National Team and the Baltimore Orioles was carried live on
2848 2853 # the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2849 2854 # During the game, play-by-play announcer Jim Hunter noted that
2850 2855 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2851 2856 # Time today." (The "two hour" remark referred to losing one hour of
2852 2857 # sleep on 1999-03-28 - when the announcers were in Cuba as it switched
2853 2858 # to DST - and one more hour on 1999-04-04 - when the announcers will have
2854 2859 # returned to Baltimore, which switches on that date.)
2855 2860
2856 2861 # From Steffen Thorsen (2013-11-11):
2857 2862 # DST start in Cuba in 2004 ... does not follow the same rules as the
2858 2863 # years before. The correct date should be Sunday 2004-03-28 00:00 ...
2859 2864 # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html
2860 2865
2861 2866 # From Evert van der Veer via Steffen Thorsen (2004-10-28):
2862 2867 # Cuba is not going back to standard time this year.
2863 2868 # From Paul Eggert (2006-03-22):
2864 2869 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
2865 2870 # says that it's due to a problem at the Antonio Guiteras
2866 2871 # thermoelectric plant, and says "This October there will be no return
2867 2872 # to normal hours (after daylight saving time)".
2868 2873 # For now, let's assume that it's a temporary measure.
2869 2874
2870 2875 # From Carlos A. Carnero Delgado (2005-11-12):
2871 2876 # This year (just like in 2004-2005) there's no change in time zone
2872 2877 # adjustment in Cuba. We will stay in daylight saving time:
2873 2878 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
2874 2879
2875 2880 # From Jesper Nørgaard Welen (2006-10-21):
2876 2881 # An article in GRANMA INTERNACIONAL claims that Cuba will end
2877 2882 # the 3 years of permanent DST next weekend, see
2878 2883 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
2879 2884 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
2880 2885 # watches should be set back one hour - going back to 00:00 hours - returning
2881 2886 # to the normal schedule....
2882 2887
2883 2888 # From Paul Eggert (2007-03-02):
2884 2889 # <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday,
2885 2890 # says Cuban clocks will advance at midnight on March 10.
2886 2891 # For lack of better information, assume Cuba will use US rules,
2887 2892 # except that it switches at midnight standard time as usual.
2888 2893 #
2889 2894 # From Steffen Thorsen (2007-10-25):
2890 2895 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
2891 2896 # earlier - on the last Sunday of October, just like in 2006.
2892 2897 #
2893 2898 # He supplied these references:
2894 2899 #
2895 2900 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES
2896 2901 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
2897 2902 #
2898 2903 # From Alex Krivenyshev (2007-10-25):
2899 2904 # Here is also article from Granma (Cuba):
2900 2905 #
2901 2906 # Regirá el Horario Normal desde el próximo domingo 28 de octubre
2902 2907 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
2903 2908 #
2904 2909 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html
2905 2910
2906 2911 # From Arthur David Olson (2008-03-09):
2907 2912 # I'm in Maryland which is now observing United States Eastern Daylight
2908 2913 # Time. At 9:44 local time I used RealPlayer to listen to
2909 2914 # http://media.enet.cu/radioreloj
2910 2915 # a Cuban information station, and heard
2911 2916 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
2912 2917 # indicating that Cuba is still on standard time.
2913 2918
2914 2919 # From Steffen Thorsen (2008-03-12):
2915 2920 # It seems that Cuba will start DST on Sunday, 2007-03-16...
2916 2921 # It was announced yesterday, according to this source (in Spanish):
2917 2922 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2918 2923 #
2919 2924 # Some more background information is posted here:
2920 2925 # https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2921 2926 #
2922 2927 # The article also says that Cuba has been observing DST since 1963,
2923 2928 # while Shanks (and tzdata) has 1965 as the first date (except in the
2924 2929 # 1940's). Many other web pages in Cuba also claim that it has been
2925 2930 # observed since 1963, but with the exception of 1970 - an exception
2926 2931 # which is not present in tzdata/Shanks. So there is a chance we need to
2927 2932 # change some historic records as well.
2928 2933 #
2929 2934 # One example:
2930 2935 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm
2931 2936
2932 2937 # From Jesper Nørgaard Welen (2008-03-13):
2933 2938 # The Cuban time change has just been confirmed on the most authoritative
2934 2939 # web site, the Granma. Please check out
2935 2940 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
2936 2941 #
2937 2942 # Basically as expected after Steffen Thorsen's information, the change
2938 2943 # will take place midnight between Saturday and Sunday.
2939 2944
2940 2945 # From Arthur David Olson (2008-03-12):
2941 2946 # Assume Sun>=15 (third Sunday) going forward.
2942 2947
2943 2948 # From Alexander Krivenyshev (2009-03-04)
2944 2949 # According to the Radio Reloj - Cuba will start Daylight Saving Time on
2945 2950 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
2946 2951 # not on midnight March 14 / March 15 as previously thought.
2947 2952 #
2948 2953 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
2949 2954 # (in Spanish)
2950 2955
2951 2956 # From Arthur David Olson (2009-03-09)
2952 2957 # I listened over the Internet to
2953 2958 # http://media.enet.cu/readioreloj
2954 2959 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
2955 2960 # the time was announced as "diez cinco" - the same time as here, indicating
2956 2961 # that has indeed switched to DST. Assume second Sunday from 2009 forward.
2957 2962
2958 2963 # From Steffen Thorsen (2011-03-08):
2959 2964 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
2960 2965 # this year. Nothing about the end date known so far (if that has
2961 2966 # changed at all).
2962 2967 #
2963 2968 # Source:
2964 2969 # http://granma.co.cu/2011/03/08/nacional/artic01.html
2965 2970 #
2966 2971 # Our info:
2967 2972 # https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
2968 2973 #
2969 2974 # From Steffen Thorsen (2011-10-30)
2970 2975 # Cuba will end DST two weeks later this year. Instead of going back
2971 2976 # tonight, it has been delayed to 2011-11-13 at 01:00.
2972 2977 #
2973 2978 # One source (Spanish)
2974 2979 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
2975 2980 #
2976 2981 # Our page:
2977 2982 # https://www.timeanddate.com/news/time/cuba-time-changes-2011.html
2978 2983 #
2979 2984 # From Steffen Thorsen (2012-03-01)
2980 2985 # According to Radio Reloj, Cuba will start DST on Midnight between March
2981 2986 # 31 and April 1.
2982 2987 #
2983 2988 # Radio Reloj has the following info (Spanish):
2984 2989 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
2985 2990 #
2986 2991 # Our info on it:
2987 2992 # https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
2988 2993
2989 2994 # From Steffen Thorsen (2012-11-03):
2990 2995 # Radio Reloj and many other sources report that Cuba is changing back
2991 2996 # to standard time on 2012-11-04:
2992 2997 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
2993 2998 # From Paul Eggert (2012-11-03):
2994 2999 # For now, assume the future rule is first Sunday in November.
2995 3000
2996 3001 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2997 3002 Rule Cuba 1928 only - Jun 10 0:00 1:00 D
2998 3003 Rule Cuba 1928 only - Oct 10 0:00 0 S
2999 3004 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
3000 3005 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
3001 3006 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
3002 3007 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
3003 3008 Rule Cuba 1965 only - Jun 1 0:00 1:00 D
3004 3009 Rule Cuba 1965 only - Sep 30 0:00 0 S
3005 3010 Rule Cuba 1966 only - May 29 0:00 1:00 D
3006 3011 Rule Cuba 1966 only - Oct 2 0:00 0 S
3007 3012 Rule Cuba 1967 only - Apr 8 0:00 1:00 D
3008 3013 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
3009 3014 Rule Cuba 1968 only - Apr 14 0:00 1:00 D
3010 3015 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
3011 3016 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
3012 3017 Rule Cuba 1972 1974 - Oct 8 0:00 0 S
3013 3018 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
3014 3019 Rule Cuba 1978 only - May 7 0:00 1:00 D
3015 3020 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S
3016 3021 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
3017 3022 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
3018 3023 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
3019 3024 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
3020 3025 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
3021 3026 Rule Cuba 1996 only - Oct 6 0:00s 0 S
3022 3027 Rule Cuba 1997 only - Oct 12 0:00s 0 S
3023 3028 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
3024 3029 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S
3025 3030 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D
3026 3031 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D
3027 3032 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S
3028 3033 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D
3029 3034 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D
3030 3035 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D
3031 3036 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D
3032 3037 Rule Cuba 2011 only - Nov 13 0:00s 0 S
3033 3038 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D
3034 3039 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S
3035 3040 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D
3036 3041
3037 3042 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3038 3043 Zone America/Havana -5:29:28 - LMT 1890
3039 3044 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
3040 3045 -5:00 Cuba C%sT
3041 3046
3042 3047 # Dominica
3043 3048 # See America/Port_of_Spain.
3044 3049
3045 3050 # Dominican Republic
3046 3051
3047 3052 # From Steffen Thorsen (2000-10-30):
3048 3053 # Enrique Morales reported to me that the Dominican Republic has changed the
3049 3054 # time zone to Eastern Standard Time as of Sunday 29 at 2 am....
3050 3055 # http://www.listin.com.do/antes/261000/republica/princi.html
3051 3056
3052 3057 # From Paul Eggert (2000-12-04):
3053 3058 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
3054 3059
3055 3060 # From Rives McDow (2000-12-01):
3056 3061 # Dominican Republic changed its mind and presidential decree on Tuesday,
3057 3062 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the
3058 3063 # Dominican Republic will be reverting to 8 hours from the International Date
3059 3064 # Line, and will not be using DST in the foreseeable future. The reason they
3060 3065 # decided to use DST was to be in synch with Puerto Rico, who was also going
3061 3066 # to implement DST. When Puerto Rico didn't implement DST, the president
3062 3067 # decided to revert.
3063 3068
3064 3069
3065 3070 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3066 3071 Rule DR 1966 only - Oct 30 0:00 1:00 EDT
3067 3072 Rule DR 1967 only - Feb 28 0:00 0 EST
3068 3073 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430
3069 3074 Rule DR 1970 only - Feb 21 0:00 0 EST
3070 3075 Rule DR 1971 only - Jan 20 0:00 0 EST
3071 3076 Rule DR 1972 1974 - Jan 21 0:00 0 EST
3072 3077 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3073 3078 Zone America/Santo_Domingo -4:39:36 - LMT 1890
3074 3079 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
3075 3080 -5:00 DR %s 1974 Oct 27
3076 3081 -4:00 - AST 2000 Oct 29 2:00
3077 3082 -5:00 US E%sT 2000 Dec 3 1:00
3078 3083 -4:00 - AST
3079 3084
3080 3085 # El Salvador
3081 3086
3082 3087 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3083 3088 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
3084 3089 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
3085 3090 # There are too many San Salvadors elsewhere, so use America/El_Salvador
3086 3091 # instead of America/San_Salvador.
3087 3092 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3088 3093 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
3089 3094 -6:00 Salv C%sT
3090 3095
3091 3096 # Grenada
3092 3097 # Guadeloupe
3093 3098 # St Barthélemy
3094 3099 # St Martin (French part)
3095 3100 # See America/Port_of_Spain.
3096 3101
3097 3102 # Guatemala
3098 3103 #
3099 3104 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
3100 3105 # Diario Co Latino, at
3101 3106 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
3102 3107 # says in an article dated 2006-04-19 that the Guatemalan government had
3103 3108 # decided on that date to advance official time by 60 minutes, to lessen the
3104 3109 # impact of the elevated cost of oil.... Daylight saving time will last from
3105 3110 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
3106 3111 # From Paul Eggert (2006-06-22):
3107 3112 # The Ministry of Energy and Mines, press release CP-15/2006
3108 3113 # (2006-04-19), says DST ends at 24:00. See
3109 3114 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf
3110 3115
3111 3116 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3112 3117 Rule Guat 1973 only - Nov 25 0:00 1:00 D
3113 3118 Rule Guat 1974 only - Feb 24 0:00 0 S
3114 3119 Rule Guat 1983 only - May 21 0:00 1:00 D
3115 3120 Rule Guat 1983 only - Sep 22 0:00 0 S
3116 3121 Rule Guat 1991 only - Mar 23 0:00 1:00 D
3117 3122 Rule Guat 1991 only - Sep 7 0:00 0 S
3118 3123 Rule Guat 2006 only - Apr 30 0:00 1:00 D
3119 3124 Rule Guat 2006 only - Oct 1 0:00 0 S
3120 3125 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3121 3126 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
3122 3127 -6:00 Guat C%sT
3123 3128
3124 3129 # Haiti
3125 3130 # From Gwillim Law (2005-04-15):
3126 3131 # Risto O. Nykänen wrote me that Haiti is now on DST.
3127 3132 # I searched for confirmation, and I found a press release
3128 3133 # on the Web page of the Haitian Consulate in Chicago (2005-03-31),
3129 3134 # <http://www.haitianconsulate.org/time.doc>. Translated from French, it says:
3130 3135 #
3131 3136 # "The Prime Minister's Communication Office notifies the public in general
3132 3137 # and the press in particular that, following a decision of the Interior
3133 3138 # Ministry and the Territorial Collectivities [I suppose that means the
3134 3139 # provinces], Haiti will move to Eastern Daylight Time in the night from next
3135 3140 # Saturday the 2nd to Sunday the 3rd.
3136 3141 #
3137 3142 # "Consequently, the Prime Minister's Communication Office wishes to inform
3138 3143 # the population that the country's clocks will be set forward one hour
3139 3144 # starting at midnight. This provision will hold until the last Saturday in
3140 3145 # October 2005.
3141 3146 #
3142 3147 # "Port-au-Prince, March 31, 2005"
3143 3148 #
3144 3149 # From Steffen Thorsen (2006-04-04):
3145 3150 # I have been informed by users that Haiti observes DST this year like
3146 3151 # last year, so the current "only" rule for 2005 might be changed to a
3147 3152 # "max" rule or to last until 2006. (Who knows if they will observe DST
3148 3153 # next year or if they will extend their DST like US/Canada next year).
3149 3154 #
3150 3155 # I have found this article about it (in French):
3151 3156 # http://www.haitipressnetwork.com/news.cfm?articleID=7612
3152 3157 #
3153 3158 # The reason seems to be an energy crisis.
3154 3159
3155 3160 # From Stephen Colebourne (2007-02-22):
3156 3161 # Some IATA info: Haiti won't be having DST in 2007.
3157 3162
3158 3163 # From Steffen Thorsen (2012-03-11):
3159 3164 # According to several news sources, Haiti will observe DST this year,
3160 3165 # apparently using the same start and end date as USA/Canada.
3161 3166 # So this means they have already changed their time.
3162 3167 #
3163 3168 # http://www.alterpresse.org/spip.php?article12510
3164 3169 # http://radiovision2000haiti.net/home/?p=13253
3165 3170 #
3166 3171 # From Arthur David Olson (2012-03-11):
3167 3172 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to
3168 3173 # 3:00 a.m. rather than the traditional Haitian jump at midnight.
3169 3174 # Assume a US-style fall back as well.
3170 3175
3171 3176 # From Steffen Thorsen (2013-03-10):
3172 3177 # It appears that Haiti is observing DST this year as well, same rules
3173 3178 # as US/Canada. They did it last year as well, and it looks like they
3174 3179 # are going to observe DST every year now...
3175 3180 #
3176 3181 # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
3177 3182 # http://www.canalplushaiti.net/?p=6714
3178 3183
3179 3184 # From Steffen Thorsen (2016-03-12):
3180 3185 # Jean Antoine, editor of www.haiti-reference.com informed us that Haiti
3181 3186 # are not going on DST this year. Several other resources confirm this: ...
3182 3187 # https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html
3183 3188 # https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/
3184 3189 # http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/
3185 3190
3186 3191 # From Steffen Thorsen (2017-03-12):
3187 3192 # We have received 4 mails from different people telling that Haiti
3188 3193 # has started DST again today, and this source seems to confirm that,
3189 3194 # I have not been able to find a more authoritative source:
3190 3195 # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html
3191 3196
3192 3197 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3193 3198 Rule Haiti 1983 only - May 8 0:00 1:00 D
3194 3199 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
3195 3200 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
3196 3201 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3197 3202 # Go with IATA.
3198 3203 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
3199 3204 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
3200 3205 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
3201 3206 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
3202 3207 Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D
3203 3208 Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S
3204 3209 Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D
3205 3210 Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S
3206 3211 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3207 3212 Zone America/Port-au-Prince -4:49:20 - LMT 1890
3208 3213 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
3209 3214 -5:00 Haiti E%sT
3210 3215
3211 3216 # Honduras
3212 3217 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3213 3218
3214 3219 # From Paul Eggert (2006-05-05):
3215 3220 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3216 3221 # saying Honduras will start using DST midnight Saturday, effective 4
3217 3222 # months until September. La Tribuna reported today
3218 3223 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
3219 3224 # of Honduras, refused to back down on this.
3220 3225
3221 3226 # From Jesper Nørgaard Welen (2006-08-08):
3222 3227 # It seems that Honduras has returned from DST to standard time this Monday at
3223 3228 # 00:00 hours (prolonging Sunday to 25 hours duration).
3224 3229 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
3225 3230
3226 3231 # From Paul Eggert (2006-08-08):
3227 3232 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3228 3233 # http://www.elheraldo.hn/nota.php?nid=54941&sec=12
3229 3234 # It mentions executive decree 18-2006.
3230 3235
3231 3236 # From Steffen Thorsen (2006-08-17):
3232 3237 # Honduras will observe DST from 2007 to 2009, exact dates are not
3233 3238 # published, I have located this authoritative source:
3234 3239 # http://www.presidencia.gob.hn/noticia.aspx?nId=47
3235 3240
3236 3241 # From Steffen Thorsen (2007-03-30):
3237 3242 # http://www.laprensahn.com/pais_nota.php?id04962=7386
3238 3243 # So it seems that Honduras will not enter DST this year....
3239 3244
3240 3245 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3241 3246 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
3242 3247 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
3243 3248 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
3244 3249 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
3245 3250 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3246 3251 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
3247 3252 -6:00 Hond C%sT
3248 3253 #
3249 3254 # Great Swan I ceded by US to Honduras in 1972
3250 3255
3251 3256 # Jamaica
3252 3257 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3253 3258 # unspecified official document, and says "This time is used throughout the
3254 3259 # island". Go with Milne. Round to the nearest second as required by zic.
3255 3260 #
3256 3261 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
|
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3257 3262 # Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
3258 3263 # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that
3259 3264 # Manley's supporters associated this act with Manley's nickname "Joshua"
3260 3265 # (recall that in the Bible the sun stood still at Joshua's request),
3261 3266 # and with the Rod of Correction which Manley said he had received from
3262 3267 # Haile Selassie, Emperor of Ethiopia. See:
3263 3268 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3264 3269 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3265 3270 #
3266 3271 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3267 -Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston
3268 - -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3272 +Zone America/Jamaica -5:07:10 - LMT 1890 # Kingston
3273 + -5:07:10 - KMT 1912 Feb # Kingston Mean Time
3269 3274 -5:00 - EST 1974
3270 3275 -5:00 US E%sT 1984
3271 3276 -5:00 - EST
3272 3277
3273 3278 # Martinique
3274 3279 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3275 3280 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
3276 3281 -4:04:20 - FFMT 1911 May # Fort-de-France MT
3277 3282 -4:00 - AST 1980 Apr 6
3278 3283 -4:00 1:00 ADT 1980 Sep 28
3279 3284 -4:00 - AST
3280 3285
3281 3286 # Montserrat
3282 3287 # See America/Port_of_Spain.
3283 3288
3284 3289 # Nicaragua
3285 3290 #
3286 3291 # This uses Shanks & Pottenger for times before 2005.
3287 3292 #
3288 3293 # From Steffen Thorsen (2005-04-12):
3289 3294 # I've got reports from 8 different people that Nicaragua just started
3290 3295 # DST on Sunday 2005-04-10, in order to save energy because of
3291 3296 # expensive petroleum. The exact end date for DST is not yet
3292 3297 # announced, only "September" but some sites also say "mid-September".
3293 3298 # Some background information is available on the President's official site:
3294 3299 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
3295 3300 # The Decree, no 23-2005 is available here:
3296 3301 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf
3297 3302 #
3298 3303 # From Paul Eggert (2005-05-01):
3299 3304 # The decree doesn't say anything about daylight saving, but for now let's
3300 3305 # assume that it is daylight saving....
3301 3306 #
3302 3307 # From Gwillim Law (2005-04-21):
3303 3308 # The Associated Press story on the time change, which can be found at
3304 3309 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
3305 3310 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last
3306 3311 # time that a change of clocks was applied to save energy was in the year 2000
3307 3312 # during the Arnoldo Alemán administration."...
3308 3313 # The northamerica file says that Nicaragua has been on UTC-6 continuously
3309 3314 # since December 1998. I wasn't able to find any details of Nicaraguan time
3310 3315 # changes in 2000. Perhaps a note could be added to the northamerica file, to
3311 3316 # the effect that we have indirect evidence that DST was observed in 2000.
3312 3317 #
3313 3318 # From Jesper Nørgaard Welen (2005-11-02):
3314 3319 # Nicaragua left DST the 2005-10-02 at 00:00 (local time).
3315 3320 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
3316 3321 # (2005-09-26)
3317 3322 #
3318 3323 # From Jesper Nørgaard Welen (2006-05-05):
3319 3324 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
3320 3325 # (my informal translation)
3321 3326 # By order of the president of the republic, Enrique Bolaños, Nicaragua
3322 3327 # advanced by sixty minutes their official time, yesterday at 2 in the
3323 3328 # morning, and will stay that way until 30th of September.
3324 3329 #
3325 3330 # From Jesper Nørgaard Welen (2006-09-30):
3326 3331 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3327 3332 # My informal translation runs:
3328 3333 # The natural sun time is restored in all the national territory, in that the
3329 3334 # time is returned one hour at 01:00 am of October 1 of 2006.
3330 3335 #
3331 3336 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3332 3337 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
3333 3338 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
3334 3339 Rule Nic 2005 only - Apr 10 0:00 1:00 D
3335 3340 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S
3336 3341 Rule Nic 2006 only - Apr 30 2:00 1:00 D
3337 3342 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S
3338 3343 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3339 3344 Zone America/Managua -5:45:08 - LMT 1890
3340 3345 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
3341 3346 -6:00 - CST 1973 May
3342 3347 -5:00 - EST 1975 Feb 16
3343 3348 -6:00 Nic C%sT 1992 Jan 1 4:00
3344 3349 -5:00 - EST 1992 Sep 24
3345 3350 -6:00 - CST 1993
3346 3351 -5:00 - EST 1997
3347 3352 -6:00 Nic C%sT
3348 3353
3349 3354 # Panama
3350 3355 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3351 3356 Zone America/Panama -5:18:08 - LMT 1890
3352 3357 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time
3353 3358 -5:00 - EST
3354 3359 Link America/Panama America/Cayman
3355 3360
3356 3361 # Puerto Rico
3357 3362 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3358 3363 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3359 3364 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
3360 3365 -4:00 - AST 1942 May 3
3361 3366 -4:00 US A%sT 1946
3362 3367 -4:00 - AST
3363 3368
3364 3369 # St Kitts-Nevis
3365 3370 # St Lucia
3366 3371 # See America/Port_of_Spain.
3367 3372
3368 3373 # St Pierre and Miquelon
3369 3374 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3370 3375 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3371 3376 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
3372 3377 -4:00 - AST 1980 May
3373 3378 -3:00 - -03 1987
3374 3379 -3:00 Canada -03/-02
3375 3380
3376 3381 # St Vincent and the Grenadines
3377 3382 # See America/Port_of_Spain.
3378 3383
3379 3384 # Turks and Caicos
3380 3385 #
3381 3386 # From Chris Dunn in
3382 3387 # https://bugs.debian.org/415007
3383 3388 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3384 3389 # daylight saving dates for time changes have been adjusted to match
3385 3390 # the recent U.S. change of dates.
3386 3391 #
3387 3392 # From Brian Inglis (2007-04-28):
3388 3393 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3389 3394 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3390 3395 # rows before that there is an out of date entry for Oct:
3391 3396 # "Eastern Standard Times Begins 2007
3392 3397 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3393 3398 # indicating that the normal ET rules are followed.
3394 3399 #
3395 3400 # From Paul Eggert (2014-08-19):
3396 3401 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See:
3397 3402 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3398 3403 # Model this as a switch from EST/EDT to AST ...
3399 3404 # From Chris Walton (2014-11-04):
3400 3405 # ... the TCI government appears to have delayed the switch to
3401 3406 # "permanent daylight saving time" by one year....
3402 3407 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3403 3408 #
3404 3409 # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen:
3405 3410 # ... agreed to the reintroduction in TCI of Daylight Saving Time (DST)
3406 3411 # during the summer months and Standard Time, also known as Local
3407 3412 # Time, during the winter months with effect from April 2018 ...
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3408 3413 # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3
3409 3414 #
3410 3415 # From Paul Eggert (2017-08-26):
3411 3416 # The date of effect of the spring 2018 change appears to be March 11,
3412 3417 # which makes more sense. See: Hamilton D. Time change back
3413 3418 # by March 2018 for TCI. Magnetic Media. 2017-08-25.
3414 3419 # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/
3415 3420 #
3416 3421 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3417 3422 Zone America/Grand_Turk -4:44:32 - LMT 1890
3418 - -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3423 + -5:07:10 - KMT 1912 Feb # Kingston Mean Time
3419 3424 -5:00 - EST 1979
3420 3425 -5:00 US E%sT 2015 Nov Sun>=1 2:00
3421 3426 -4:00 - AST 2018 Mar 11 3:00
3422 3427 -5:00 US E%sT
3423 3428
3424 3429 # British Virgin Is
3425 3430 # Virgin Is
3426 3431 # See America/Port_of_Spain.
3427 3432
3428 3433
3429 3434 # Local Variables:
3430 3435 # coding: utf-8
3431 3436 # End:
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