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6870 Update zoneinfo to 2016c
Reviewed by: Jason King <jason.brian.king@gmail.com>
Reviewed by: Igor Kozhukhov <ikozhukhov@gmail.com>
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--- old/usr/src/cmd/zic/northamerica
+++ new/usr/src/cmd/zic/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
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 # His proposal was adopted by the railroads on 1883-11-18 at 12:00,
28 28 # and the most of the country soon followed suit.
29 29
30 30 # From Paul Eggert (2005-04-16):
31 31 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
32 32 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
33 33
34 34 # From Paul Eggert (2006-03-22):
35 35 # A good source for time zone historical data in the US is
36 36 # Thomas G. Shanks, The American Atlas (5th edition),
37 37 # San Diego: ACS Publications, Inc. (1991).
38 38 # Make sure you have the errata sheet; the book is somewhat useless without it.
39 39 # It is the source for most of the pre-1991 US entries below.
40 40
41 41 # From Paul Eggert (2001-03-06):
42 42 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin
43 43 # in his whimsical essay "An Economical Project for Diminishing the Cost
44 44 # of Light" published in the Journal de Paris (1784-04-26).
45 45 # Not everyone is happy with the results:
46 46 #
47 47 # I don't really care how time is reckoned so long as there is some
48 48 # agreement about it, but I object to being told that I am saving
49 49 # daylight when my reason tells me that I am doing nothing of the kind.
50 50 # I even object to the implication that I am wasting something
51 51 # valuable if I stay in bed after the sun has risen. As an admirer
52 52 # of moonlight I resent the bossy insistence of those who want to
53 53 # reduce my time for enjoying it. At the back of the Daylight Saving
54 54 # scheme I detect the bony, blue-fingered hand of Puritanism, eager
55 55 # to push people into bed earlier, and get them up earlier, to make
56 56 # them healthy, wealthy and wise in spite of themselves.
57 57 #
58 58 # -- Robertson Davies, The diary of Samuel Marchbanks,
59 59 # Clarke, Irwin (1947), XIX, Sunday
60 60 #
61 61 # For more about the first ten years of DST in the United States, see
62 62 # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint
63 63 # (Carnegie Library of Pittsburgh, 1927).
64 64 # http://www.clpgh.org/exhibit/dst.html
65 65 #
66 66 # Shanks says that DST was called "War Time" in the US in 1918 and 1919.
67 67 # However, DST was imposed by the Standard Time Act of 1918, which
68 68 # was the first nationwide legal time standard, and apparently
69 69 # time was just called "Standard Time" or "Daylight Saving Time".
70 70
71 71 # From Arthur David Olson:
72 72 # US Daylight Saving Time ended on the last Sunday of *October* in 1974.
73 73 # See, for example, the front page of the Saturday, 1974-10-26
74 74 # and Sunday, 1974-10-27 editions of the Washington Post.
75 75
76 76 # From Arthur David Olson:
77 77 # Before the Uniform Time Act of 1966 took effect in 1967, observance of
78 78 # Daylight Saving Time in the US was by local option, except during wartime.
79 79
80 80 # From Arthur David Olson (2000-09-25):
81 81 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
82 82 # In the introduction, Oboler spoke of "Eastern Peace Time."
83 83 # An AltaVista search turned up:
84 84 # http://rowayton.org/rhs/hstaug45.html
85 85 # "When the time is announced over the radio now, it is 'Eastern Peace
86 86 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
87 87 # (August 1945) by way of confirmation.
88 88
89 89 # From Joseph Gallant citing
90 90 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
91 91 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
92 92 # to switch to London for Attlee's address, but the American people
93 93 # never got to hear his speech live. According to one press account,
94 94 # CBS' Bob Trout was first to announce the word of Japan's surrender,
95 95 # but a few seconds later, NBC, ABC and Mutual also flashed the word
96 96 # of surrender, all of whom interrupting the bells of Big Ben in
97 97 # London which were to precede Mr. Attlee's speech.
98 98
99 99 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From
100 100 # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
101 101 #
102 102 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
103 103 # Any announcement from Asia would reach St. John's New York newsroom on a
104 104 # wire service teletype machine, which had prescribed signals for major news.
105 105 # Associated Press, for example, would ring five bells before spewing out
106 106 # typed copy of an important story, and 10 bells for news "of transcendental
107 107 # importance."
108 108 #
109 109 # On Aug. 14, stalling while talking steadily into the NBC networks' open
110 110 # microphone, St. John heard five bells and waited only to hear a sixth bell,
111 111 # before announcing confidently: "Ladies and gentlemen, World War II is over.
112 112 # The Japanese have agreed to our surrender terms."
113 113 #
114 114 # He had scored a 20-second scoop on other broadcasters.
115 115
116 116 # From Arthur David Olson (2005-08-22):
117 117 # Paul has been careful to use the "US" rules only in those locations
118 118 # that are part of the United States; this reflects the real scope of
119 119 # U.S. government action. So even though the "US" rules have changed
120 120 # in the latest release, other countries won't be affected.
121 121
122 122 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
123 123 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
124 124 Rule US 1918 1919 - Oct lastSun 2:00 0 S
125 125 Rule US 1942 only - Feb 9 2:00 1:00 W # War
126 126 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
127 127 Rule US 1945 only - Sep lastSun 2:00 0 S
128 128 Rule US 1967 2006 - Oct lastSun 2:00 0 S
129 129 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
130 130 Rule US 1974 only - Jan 6 2:00 1:00 D
131 131 Rule US 1975 only - Feb 23 2:00 1:00 D
132 132 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
133 133 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
134 134 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
135 135 Rule US 2007 max - Nov Sun>=1 2:00 0 S
136 136
137 137 # From Arthur David Olson, 2005-12-19
138 138 # We generate the files specified below to guard against old files with
139 139 # obsolete information being left in the time zone binary directory.
140 140 # We limit the list to names that have appeared in previous versions of
141 141 # this time zone package.
142 142 # We do these as separate Zones rather than as Links to avoid problems if
143 143 # a particular place changes whether it observes DST.
144 144 # We put these specifications here in the northamerica file both to
145 145 # increase the chances that they'll actually get compiled and to
146 146 # avoid the need to duplicate the US rules in another file.
147 147
148 148 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
149 149 Zone EST -5:00 - EST
150 150 Zone MST -7:00 - MST
151 151 Zone HST -10:00 - HST
152 152 Zone EST5EDT -5:00 US E%sT
153 153 Zone CST6CDT -6:00 US C%sT
154 154 Zone MST7MDT -7:00 US M%sT
155 155 Zone PST8PDT -8:00 US P%sT
156 156
157 157 # From Bob Devine (1988-01-28):
158 158 # ...Alaska (and Hawaii) had the timezone names changed in 1967.
159 159 # old new
160 160 # Pacific Standard Time(PST) -same-
161 161 # Yukon Standard Time(YST) -same-
162 162 # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
163 163 # Nome Standard Time (NT) Bering Standard Time (BST)
164 164 #
165 165 # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
166 166 # The YST zone now covers nearly all of the state, AHST just part
167 167 # of the Aleutian islands. No DST.
168 168
169 169 # From Paul Eggert (1995-12-19):
170 170 # The tables below use 'NST', not 'NT', for Nome Standard Time.
171 171 # I invented 'CAWT' for Central Alaska War Time.
172 172
173 173 # From U. S. Naval Observatory (1989-01-19):
174 174 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
175 175 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
176 176 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
177 177 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
178 178 # USA MOUNTAIN 7 H BEHIND UTC DENVER
179 179 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
180 180 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
181 181 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
182 182 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
183 183 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
184 184 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
185 185 # USA " 9 H BEHIND UTC APR 3 - OCT 30
186 186 # USA HAWAII 10 H BEHIND UTC
187 187 # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY
188 188
189 189 # From Arthur David Olson (1989-01-21):
190 190 # The above dates are for 1988.
191 191 # Note the "AKST" and "AKDT" abbreviations, the claim that there's
192 192 # no DST in Samoa, and the claim that there is DST in Alaska and the
193 193 # Aleutians.
194 194
195 195 # From Arthur David Olson (1988-02-13):
196 196 # Legal standard time zone names, from United States Code (1982 Edition and
197 197 # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names
198 198 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
199 199 # took effect), as explained in sections 263 and 261:
200 200 # (none)
201 201 # United States standard eastern time
202 202 # United States standard mountain time
203 203 # United States standard central time
204 204 # United States standard Pacific time
205 205 # (none)
206 206 # United States standard Alaska time
207 207 # (none)
208 208 # Next, names from 1967-04-01 until 1983-11-30 (the date for
209 209 # public law 98-181):
210 210 # Atlantic standard time
211 211 # eastern standard time
212 212 # central standard time
213 213 # mountain standard time
214 214 # Pacific standard time
215 215 # Yukon standard time
216 216 # Alaska-Hawaii standard time
217 217 # Bering standard time
218 218 # And after 1983-11-30:
219 219 # Atlantic standard time
220 220 # eastern standard time
221 221 # central standard time
222 222 # mountain standard time
223 223 # Pacific standard time
224 224 # Alaska standard time
225 225 # Hawaii-Aleutian standard time
226 226 # Samoa standard time
227 227 # The law doesn't give abbreviations.
228 228 #
229 229 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
230 230 # Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time"
231 231 # for time in Guam and the Northern Marianas. See the file "australasia".
232 232 #
233 233 # From Paul Eggert (2015-04-17):
234 234 # HST and HDT are standardized abbreviations for Hawaii-Aleutian
235 235 # standard and daylight times. See section 9.47 (p 234) of the
236 236 # U.S. Government Printing Office Style Manual (2008)
237 237 # http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
238 238
239 239 # From Arthur David Olson, 2005-08-09
240 240 # The following was signed into law on 2005-08-08.
241 241 #
242 242 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
243 243 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
244 244 # U.S.C. 260a(a)) is amended--
245 245 # (1) by striking "first Sunday of April" and inserting "second
246 246 # Sunday of March"; and
247 247 # (2) by striking "last Sunday of October" and inserting "first
248 248 # Sunday of November'.
249 249 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the
250 250 # date of enactment of this Act or March 1, 2007, whichever is later.
251 251 # (c) Report to Congress.--Not later than 9 months after the effective
252 252 # date stated in subsection (b), the Secretary shall report to Congress
253 253 # on the impact of this section on energy consumption in the United
254 254 # States.
255 255 # (d) Right to Revert.--Congress retains the right to revert the
256 256 # Daylight Saving Time back to the 2005 time schedules once the
257 257 # Department study is complete.
258 258
259 259 # US eastern time, represented by New York
260 260
261 261 # Connecticut, Delaware, District of Columbia, most of Florida,
262 262 # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
263 263 # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
264 264 # New Hampshire, New Jersey, New York, North Carolina, Ohio,
265 265 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
266 266 # Vermont, Virginia, West Virginia
267 267
268 268 # From Dave Cantor (2004-11-02):
269 269 # Early this summer I had the occasion to visit the Mount Washington
270 270 # Observatory weather station atop (of course!) Mount Washington [, NH]....
271 271 # One of the staff members said that the station was on Eastern Standard Time
272 272 # and didn't change their clocks for Daylight Saving ... so that their
273 273 # reports will always have times which are 5 hours behind UTC.
274 274
275 275 # From Paul Eggert (2005-08-26):
276 276 # According to today's Huntsville Times
277 277 # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1
278 278 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City
279 279 # in Russell County, Lanett in Chambers County and some towns in Lee County,
280 280 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
281 281 # Roberts, city administrator in Phenix City. as saying "We are in the Central
282 282 # time zone, but we do go by the Eastern time zone because so many people work
283 283 # in Columbus."
284 284
285 285 # From Paul Eggert (2014-09-06):
286 286 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
287 287 # says that New York City Hall time was 3 minutes 58.4 seconds fast of
288 288 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the
289 289 # nearest second.
290 290
291 291 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
292 292 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
293 293 Rule NYC 1920 only - Oct lastSun 2:00 0 S
294 294 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
295 295 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
296 296 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
297 297 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
298 298 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58
299 299 -5:00 US E%sT 1920
300 300 -5:00 NYC E%sT 1942
301 301 -5:00 US E%sT 1946
302 302 -5:00 NYC E%sT 1967
303 303 -5:00 US E%sT
304 304
305 305 # US central time, represented by Chicago
306 306
307 307 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
308 308 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
309 309 # Washington counties), Illinois, western Indiana
310 310 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
311 311 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
312 312 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
313 313 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
314 314 # western Tennessee, most of Texas, Wisconsin
315 315
316 316 # From Larry M. Smith (2006-04-26) re Wisconsin:
317 317 # http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
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318 318 # is currently enforced at the 01:00 time of change. Because the local
319 319 # "bar time" in the state corresponds to 02:00, a number of citations
320 320 # are issued for the "sale of class 'B' alcohol after prohibited
321 321 # hours" within the deviated hour of this change every year....
322 322 #
323 323 # From Douglas R. Bomberg (2007-03-12):
324 324 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
325 325 # Statue 175 closer in synch with the US Congress' intent....
326 326 # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf
327 327
328 +# From an email administrator of the City of Fort Pierre, SD (2015-12-21):
329 +# Fort Pierre is technically located in the Mountain time zone as is
330 +# the rest of Stanley County. Most of Stanley County and Fort Pierre
331 +# uses the Central time zone due to doing most of their business in
332 +# Pierre so it simplifies schedules. I have lived in Stanley County
333 +# all my life and it has been that way since I can remember. (43 years!)
334 +#
335 +# From Paul Eggert (2015-12-25):
336 +# Assume this practice predates 1970, so Fort Pierre can use America/Chicago.
337 +
328 338 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
329 339 Rule Chicago 1920 only - Jun 13 2:00 1:00 D
330 340 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
331 341 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
332 342 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
333 343 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
334 344 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
335 345 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
336 346 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24
337 347 -6:00 US C%sT 1920
338 348 -6:00 Chicago C%sT 1936 Mar 1 2:00
339 349 -5:00 - EST 1936 Nov 15 2:00
340 350 -6:00 Chicago C%sT 1942
341 351 -6:00 US C%sT 1946
342 352 -6:00 Chicago C%sT 1967
343 353 -6:00 US C%sT
344 354 # Oliver County, ND switched from mountain to central time on 1992-10-25.
345 355 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
346 356 -7:00 US M%sT 1992 Oct 25 2:00
347 357 -6:00 US C%sT
348 358 # Morton County, ND, switched from mountain to central time on
349 359 # 2003-10-26, except for the area around Mandan which was already central time.
350 360 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
351 361 # Officially this switch also included part of Sioux County, and
352 362 # Jones, Mellette, and Todd Counties in South Dakota;
353 363 # but in practice these other counties were already observing central time.
354 364 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
355 365 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
356 366 -7:00 US M%sT 2003 Oct 26 2:00
357 367 -6:00 US C%sT
358 368
359 369 # From Josh Findley (2011-01-21):
360 370 # ...it appears that Mercer County, North Dakota, changed from the
361 371 # mountain time zone to the central time zone at the last transition from
362 372 # daylight-saving to standard time (on Nov. 7, 2010):
363 373 # http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
364 374 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
365 375
366 376 # From Andy Lipscomb (2011-01-24):
367 377 # ...according to the Census Bureau, the largest city is Beulah (although
368 378 # it's commonly referred to as Beulah-Hazen, with Hazen being the next
369 379 # largest city in Mercer County). Google Maps places Beulah's city hall
370 380 # at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset
371 381 # of 6h47'07".
372 382
373 383 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53
374 384 -7:00 US M%sT 2010 Nov 7 2:00
375 385 -6:00 US C%sT
376 386
377 387 # US mountain time, represented by Denver
378 388 #
379 389 # Colorado, far western Kansas, Montana, western
380 390 # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
381 391 # New Mexico, southwestern North Dakota,
382 392 # western South Dakota, far western Texas (El Paso County, Hudspeth County,
383 393 # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
384 394 #
385 395 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
386 396 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
387 397 Rule Denver 1920 only - Oct lastSun 2:00 0 S
388 398 Rule Denver 1921 only - May 22 2:00 0 S
389 399 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
390 400 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
391 401 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
392 402 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04
393 403 -7:00 US M%sT 1920
394 404 -7:00 Denver M%sT 1942
395 405 -7:00 US M%sT 1946
396 406 -7:00 Denver M%sT 1967
397 407 -7:00 US M%sT
398 408
399 409 # US Pacific time, represented by Los Angeles
400 410 #
401 411 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
402 412 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
403 413 # north of the Salmon River, and the towns of Burgdorf and Warren),
404 414 # Nevada (except West Wendover), Oregon (except the northern 3/4 of
405 415 # Malheur county), and Washington
406 416 #
407 417 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
408 418 Rule CA 1948 only - Mar 14 2:00 1:00 D
409 419 Rule CA 1949 only - Jan 1 2:00 0 S
410 420 Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D
411 421 Rule CA 1950 1961 - Sep lastSun 2:00 0 S
412 422 Rule CA 1962 1966 - Oct lastSun 2:00 0 S
413 423 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
414 424 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
415 425 -8:00 US P%sT 1946
416 426 -8:00 CA P%sT 1967
417 427 -8:00 US P%sT
418 428
419 429 # Alaska
420 430 # AK%sT is the modern abbreviation for -9:00 per USNO.
421 431 #
422 432 # From Paul Eggert (2001-05-30):
423 433 # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
424 434 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
425 435 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
426 436 # also a Friday. Include only the time zone part of this transition,
427 437 # ignoring the switch from Julian to Gregorian, since we can't represent
428 438 # the Julian calendar.
429 439 #
430 440 # As far as we know, none of the exact locations mentioned below were
431 441 # permanently inhabited in 1867 by anyone using either calendar.
432 442 # (Yakutat was colonized by the Russians in 1799, but the settlement
433 443 # was destroyed in 1805 by a Yakutat-kon war party.) However, there
434 444 # were nearby inhabitants in some cases and for our purposes perhaps
435 445 # it's best to simply use the official transition.
436 446
437 447 # From Paul Eggert (2014-07-18):
438 448 # One opinion of the early-1980s turmoil in Alaska over time zones and
439 449 # daylight saving time appeared as graffiti on a Juneau airport wall:
440 450 # "Welcome to Juneau. Please turn your watch back to the 19th century."
441 451 # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01.
442 452 # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html
443 453 #
444 454 # Steve Ferguson (2011-01-31) referred to the following source:
445 455 # Norris F. Keeping time in Alaska: national directives, local response.
446 456 # Alaska History 2001;16(1-2).
447 457 # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/
448 458
449 459 # From Arthur David Olson (2011-02-01):
450 460 # Here's database-relevant material from the 2001 "Alaska History" article:
451 461 #
452 462 # On September 20 [1979]...DOT...officials decreed that on April 27,
453 463 # 1980, Juneau and other nearby communities would move to Yukon Time.
454 464 # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on
455 465 # Pacific Time.
456 466 #
457 467 # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the
458 468 # Department's September 1979 decision. Juneau and other communities in
459 469 # northern Southeast reverted to Pacific Time on October 26.
460 470 #
461 471 # On October 28 [1983]...the Metlakatla Indian Community Council voted
462 472 # unanimously to keep the reservation on Pacific Time.
463 473 #
464 474 # According to DOT official Joanne Petrie, Indian reservations are not
465 475 # bound to follow time zones imposed by neighboring jurisdictions.
466 476 #
467 477 # (The last is consistent with how the database now handles the Navajo
468 478 # Nation.)
469 479
470 480 # From Arthur David Olson (2011-02-09):
471 481 # I just spoke by phone with a staff member at the Metlakatla Indian
472 482 # Community office (using contact information available at
473 483 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla
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474 484 # It's shortly after 1:00 here on the east coast of the United States;
475 485 # the staffer said it was shortly after 10:00 there. When I asked whether
476 486 # that meant they were on Pacific time, they said no - they were on their
477 487 # own time. I asked about daylight saving; they said it wasn't used. I
478 488 # did not inquire about practices in the past.
479 489
480 490 # From Arthur David Olson (2011-08-17):
481 491 # For lack of better information, assume that Metlakatla's
482 492 # abandonment of use of daylight saving resulted from the 1983 vote.
483 493
494 +# From Steffen Thorsen (2015-11-09):
495 +# It seems Metlakatla did go off PST on Sunday, November 1, changing
496 +# their time to AKST and are going to follow Alaska's DST, switching
497 +# between AKST and AKDT from now on....
498 +# http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
499 +
484 500 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
485 501 Zone America/Juneau 15:02:19 - LMT 1867 Oct 18
486 502 -8:57:41 - LMT 1900 Aug 20 12:00
487 503 -8:00 - PST 1942
488 504 -8:00 US P%sT 1946
489 505 -8:00 - PST 1969
490 506 -8:00 US P%sT 1980 Apr 27 2:00
491 507 -9:00 US Y%sT 1980 Oct 26 2:00
492 508 -8:00 US P%sT 1983 Oct 30 2:00
493 509 -9:00 US Y%sT 1983 Nov 30
494 510 -9:00 US AK%sT
495 511 Zone America/Sitka 14:58:47 - LMT 1867 Oct 18
496 512 -9:01:13 - LMT 1900 Aug 20 12:00
497 513 -8:00 - PST 1942
498 514 -8:00 US P%sT 1946
|
↓ open down ↓ |
5 lines elided |
↑ open up ↑ |
499 515 -8:00 - PST 1969
500 516 -8:00 US P%sT 1983 Oct 30 2:00
501 517 -9:00 US Y%sT 1983 Nov 30
502 518 -9:00 US AK%sT
503 519 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18
504 520 -8:46:18 - LMT 1900 Aug 20 12:00
505 521 -8:00 - PST 1942
506 522 -8:00 US P%sT 1946
507 523 -8:00 - PST 1969
508 524 -8:00 US P%sT 1983 Oct 30 2:00
509 - -8:00 - PST
525 + -8:00 - PST 2015 Nov 1 2:00
526 + -9:00 US AK%sT
510 527 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18
511 528 -9:18:55 - LMT 1900 Aug 20 12:00
512 529 -9:00 - YST 1942
513 530 -9:00 US Y%sT 1946
514 531 -9:00 - YST 1969
515 532 -9:00 US Y%sT 1983 Nov 30
516 533 -9:00 US AK%sT
517 534 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18
518 535 -9:59:36 - LMT 1900 Aug 20 12:00
519 536 -10:00 - CAT 1942
520 537 -10:00 US CAT/CAWT 1945 Aug 14 23:00u
521 538 -10:00 US CAT/CAPT 1946 # Peace
522 539 -10:00 - CAT 1967 Apr
523 540 -10:00 - AHST 1969
524 541 -10:00 US AH%sT 1983 Oct 30 2:00
525 542 -9:00 US Y%sT 1983 Nov 30
526 543 -9:00 US AK%sT
527 544 Zone America/Nome 12:58:21 - LMT 1867 Oct 18
528 545 -11:01:38 - LMT 1900 Aug 20 12:00
529 546 -11:00 - NST 1942
530 547 -11:00 US N%sT 1946
531 548 -11:00 - NST 1967 Apr
532 549 -11:00 - BST 1969
533 550 -11:00 US B%sT 1983 Oct 30 2:00
534 551 -9:00 US Y%sT 1983 Nov 30
535 552 -9:00 US AK%sT
536 553 Zone America/Adak 12:13:21 - LMT 1867 Oct 18
537 554 -11:46:38 - LMT 1900 Aug 20 12:00
538 555 -11:00 - NST 1942
539 556 -11:00 US N%sT 1946
540 557 -11:00 - NST 1967 Apr
541 558 -11:00 - BST 1969
542 559 -11:00 US B%sT 1983 Oct 30 2:00
543 560 -10:00 US AH%sT 1983 Nov 30
544 561 -10:00 US H%sT
545 562 # The following switches don't quite make our 1970 cutoff.
546 563 #
547 564 # Shanks writes that part of southwest Alaska (e.g. Aniak)
548 565 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
549 566 # and another part (e.g. Akiak) made the same switch five weeks later.
550 567 #
551 568 # From David Flater (2004-11-09):
552 569 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
553 570 # Historic Preservation Commission, provided this information, which
554 571 # suggests that Unalaska deviated from statutory time from early 1967
555 572 # possibly until 1983:
556 573 #
557 574 # Minutes of the Unalaska City Council Meeting, January 10, 1967:
558 575 # "Except for St. Paul and Akutan, Unalaska is the only important
559 576 # location not on Alaska Standard Time. The following resolution was
560 577 # made by William Robinson and seconded by Henry Swanson: Be it
561 578 # resolved that the City of Unalaska hereby goes to Alaska Standard
562 579 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
563 580 # January 14, Alaska Standard Time.) This resolution was passed with
564 581 # three votes for and one against."
565 582
566 583 # Hawaii
567 584
568 585 # From Arthur David Olson (2010-12-09):
569 586 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
570 587 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
571 588 # the article is available at
572 589 # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
573 590 # and indicates that standard time was adopted effective noon, January
574 591 # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
575 592 # saving for the period between the last Sunday of each April and the
576 593 # last Sunday of each September, but less than a month later repealed the
577 594 # act," (page 220), that year-round daylight saving time was in effect
578 595 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
579 596 # when clocks changed) and that clocks were changed by 30 minutes
580 597 # effective the second Sunday of June, 1947 (page 219, with no time of
581 598 # day given for when clocks changed). A footnote for the 1933 changes
582 599 # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933)
583 600 # and Act 163 (approved 21 May 1933)."
584 601
585 602 # From Arthur David Olson (2011-01-19):
586 603 # The following is from "Laws of the Territory of Hawaii Passed by the
587 604 # Seventeenth Legislature: Regular Session 1933," available (as of
588 605 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act
589 606 # 90...At 2 o'clock ante meridian of the last Sunday in April of each
590 607 # year, the standard time of this Territory shall be advanced one
591 608 # hour...This Act shall take effect upon its approval. Approved this 26th
592 609 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
593 610 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
594 611 # hereby repealed...This Act shall take effect upon its approval, upon
595 612 # which date the standard time of this Territory shall be restored to
596 613 # that existing immediately prior to the taking effect of said Act 90.
597 614 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
598 615 # of the Territory of Hawaii."
599 616 #
600 617 # Note that 1933-05-21 was a Sunday.
601 618 # We're left to guess the time of day when Act 163 was approved; guess noon.
602 619
603 620 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
604 621 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00
605 622 -10:30 - HST 1933 Apr 30 2:00
606 623 -10:30 1:00 HDT 1933 May 21 12:00
607 624 -10:30 - HST 1942 Feb 9 2:00
608 625 -10:30 1:00 HDT 1945 Sep 30 2:00
609 626 -10:30 - HST 1947 Jun 8 2:00
610 627 -10:00 - HST
611 628 Link Pacific/Honolulu Pacific/Johnston
612 629
613 630 # Now we turn to US areas that have diverged from the consensus since 1970.
614 631
615 632 # Arizona mostly uses MST.
616 633
617 634 # From Paul Eggert (2002-10-20):
618 635 #
619 636 # The information in the rest of this paragraph is derived from the
620 637 # Daylight Saving Time web page
621 638 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
622 639 # maintained by the Arizona State Library, Archives and Public Records.
623 640 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
624 641 # time, but by federal law railroads, airlines, bus lines, military
625 642 # personnel, and some engaged in interstate commerce continued to
626 643 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix
627 644 # Gazette says that was the date the law changed, and that 04-01 was
628 645 # the date the state's clocks would change. In 1945 the State of
629 646 # Arizona used standard time all year, again with exceptions only as
630 647 # mandated by federal law. Arizona observed DST in 1967, but Arizona
631 648 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
632 649 #
633 650 # Shanks says the 1944 experiment came to an end on 1944-03-17.
634 651 # Go with the Arizona State Library instead.
635 652
636 653 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
637 654 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42
638 655 -7:00 US M%sT 1944 Jan 1 0:01
639 656 -7:00 - MST 1944 Apr 1 0:01
640 657 -7:00 US M%sT 1944 Oct 1 0:01
641 658 -7:00 - MST 1967
642 659 -7:00 US M%sT 1968 Mar 21
643 660 -7:00 - MST
644 661 # From Arthur David Olson (1988-02-13):
645 662 # A writer from the Inter Tribal Council of Arizona, Inc.,
646 663 # notes in private correspondence dated 1987-12-28 that "Presently, only the
647 664 # Navajo Nation participates in the Daylight Saving Time policy, due to its
648 665 # large size and location in three states." (The "only" means that other
649 666 # tribal nations don't use DST.)
650 667 #
651 668 # From Paul Eggert (2013-08-26):
652 669 # See America/Denver for a zone appropriate for the Navajo Nation.
653 670
654 671 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
655 672 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
656 673 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
657 674 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
658 675 # Teton, Twin Falls, Valley, Washington counties, and the southern
659 676 # quarter of Idaho county) and eastern Oregon (most of Malheur County)
660 677 # switched four weeks late in 1974.
661 678 #
662 679 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
663 680 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11
664 681 -8:00 US P%sT 1923 May 13 2:00
665 682 -7:00 US M%sT 1974
666 683 -7:00 - MST 1974 Feb 3 2:00
667 684 -7:00 US M%sT
668 685
669 686 # Indiana
670 687 #
671 688 # For a map of Indiana's time zone regions, see:
672 689 # http://en.wikipedia.org/wiki/Time_in_Indiana
673 690 #
674 691 # From Paul Eggert (2007-08-17):
675 692 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
676 693 # with the following exceptions:
677 694 #
678 695 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
679 696 # Vanderburgh, and Warrick counties have been like America/Chicago.
680 697 #
681 698 # - Dearborn and Ohio counties have been like America/New_York.
682 699 #
683 700 # - Clark, Floyd, and Harrison counties have been like
684 701 # America/Kentucky/Louisville.
685 702 #
686 703 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
687 704 # and Switzerland counties have their own time zone histories as noted below.
688 705 #
689 706 # Shanks partitioned Indiana into 345 regions, each with its own time history,
690 707 # and wrote "Even newspaper reports present contradictory information."
691 708 # Those Hoosiers! Such a flighty and changeable people!
692 709 # Fortunately, most of the complexity occurred before our cutoff date of 1970.
693 710 #
694 711 # Other than Indianapolis, the Indiana place names are so nondescript
695 712 # that they would be ambiguous if we left them at the 'America' level.
696 713 # So we reluctantly put them all in a subdirectory 'America/Indiana'.
697 714
698 715 # From Paul Eggert (2014-06-26):
699 716 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
700 717 # says "DOT is relocating the time zone boundary in Indiana to move Starke,
701 718 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
702 719 # Eastern Time Zone to the Central Time Zone.... The effective date of
703 720 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the
704 721 # changeover date from standard time to Daylight Saving Time."
705 722 # Strictly speaking, this meant the affected counties changed their
706 723 # clocks twice that night, but this obviously was in error. The intent
707 724 # was that 01:59:59 EST be followed by 02:00:00 CDT.
708 725
709 726 # From Gwillim Law (2007-02-10):
710 727 # The Associated Press has been reporting that Pulaski County, Indiana is
711 728 # going to switch from Central to Eastern Time on March 11, 2007....
712 729 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
713 730
714 731 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
715 732 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
716 733 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
717 734 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
718 735 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
719 736 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
720 737 -6:00 US C%sT 1920
721 738 -6:00 Indianapolis C%sT 1942
722 739 -6:00 US C%sT 1946
723 740 -6:00 Indianapolis C%sT 1955 Apr 24 2:00
724 741 -5:00 - EST 1957 Sep 29 2:00
725 742 -6:00 - CST 1958 Apr 27 2:00
726 743 -5:00 - EST 1969
727 744 -5:00 US E%sT 1971
728 745 -5:00 - EST 2006
729 746 -5:00 US E%sT
730 747 #
731 748 # Eastern Crawford County, Indiana, left its clocks alone in 1974,
732 749 # as well as from 1976 through 2005.
733 750 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
734 751 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
735 752 Rule Marengo 1951 only - Sep lastSun 2:00 0 S
736 753 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
737 754 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
738 755 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
739 756 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37
740 757 -6:00 US C%sT 1951
741 758 -6:00 Marengo C%sT 1961 Apr 30 2:00
742 759 -5:00 - EST 1969
743 760 -5:00 US E%sT 1974 Jan 6 2:00
744 761 -6:00 1:00 CDT 1974 Oct 27 2:00
745 762 -5:00 US E%sT 1976
746 763 -5:00 - EST 2006
747 764 -5:00 US E%sT
748 765 #
749 766 # Daviess, Dubois, Knox, and Martin Counties, Indiana,
750 767 # switched from eastern to central time in April 2006, then switched back
751 768 # in November 2007.
752 769 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
753 770 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D
754 771 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S
755 772 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D
756 773 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S
757 774 Rule Vincennes 1955 only - May 1 0:00 1:00 D
758 775 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D
759 776 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S
760 777 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S
761 778 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S
762 779 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
763 780 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53
764 781 -6:00 US C%sT 1946
765 782 -6:00 Vincennes C%sT 1964 Apr 26 2:00
766 783 -5:00 - EST 1969
767 784 -5:00 US E%sT 1971
768 785 -5:00 - EST 2006 Apr 2 2:00
769 786 -6:00 US C%sT 2007 Nov 4 2:00
770 787 -5:00 US E%sT
771 788 #
772 789 # Perry County, Indiana, switched from eastern to central time in April 2006.
773 790 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
774 791 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D
775 792 Rule Perry 1946 only - Sep lastSun 2:00 0 S
776 793 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D
777 794 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S
778 795 Rule Perry 1955 only - May 1 0:00 1:00 D
779 796 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D
780 797 Rule Perry 1960 only - Oct lastSun 2:00 0 S
781 798 Rule Perry 1961 only - Sep lastSun 2:00 0 S
782 799 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S
783 800 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
784 801 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57
785 802 -6:00 US C%sT 1946
786 803 -6:00 Perry C%sT 1964 Apr 26 2:00
787 804 -5:00 - EST 1969
788 805 -5:00 US E%sT 1971
789 806 -5:00 - EST 2006 Apr 2 2:00
790 807 -6:00 US C%sT
791 808 #
792 809 # Pike County, Indiana moved from central to eastern time in 1977,
793 810 # then switched back in 2006, then switched back again in 2007.
794 811 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
795 812 Rule Pike 1955 only - May 1 0:00 1:00 D
796 813 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S
797 814 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D
798 815 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S
799 816 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
800 817 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53
801 818 -6:00 US C%sT 1955
802 819 -6:00 Pike C%sT 1965 Apr 25 2:00
803 820 -5:00 - EST 1966 Oct 30 2:00
804 821 -6:00 US C%sT 1977 Oct 30 2:00
805 822 -5:00 - EST 2006 Apr 2 2:00
806 823 -6:00 US C%sT 2007 Nov 4 2:00
807 824 -5:00 US E%sT
808 825 #
809 826 # Starke County, Indiana moved from central to eastern time in 1991,
810 827 # then switched back in 2006.
811 828 # From Arthur David Olson (1991-10-28):
812 829 # An article on page A3 of the Sunday, 1991-10-27 Washington Post
813 830 # notes that Starke County switched from Central time to Eastern time as of
814 831 # 1991-10-27.
815 832 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
816 833 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
817 834 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
818 835 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
819 836 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
820 837 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
821 838 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
822 839 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30
823 840 -6:00 US C%sT 1947
824 841 -6:00 Starke C%sT 1962 Apr 29 2:00
825 842 -5:00 - EST 1963 Oct 27 2:00
826 843 -6:00 US C%sT 1991 Oct 27 2:00
827 844 -5:00 - EST 2006 Apr 2 2:00
828 845 -6:00 US C%sT
829 846 #
830 847 # Pulaski County, Indiana, switched from eastern to central time in
831 848 # April 2006 and then switched back in March 2007.
832 849 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
833 850 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D
834 851 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S
835 852 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S
836 853 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S
837 854 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
838 855 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35
839 856 -6:00 US C%sT 1946
840 857 -6:00 Pulaski C%sT 1961 Apr 30 2:00
841 858 -5:00 - EST 1969
842 859 -5:00 US E%sT 1971
843 860 -5:00 - EST 2006 Apr 2 2:00
844 861 -6:00 US C%sT 2007 Mar 11 2:00
845 862 -5:00 US E%sT
846 863 #
847 864 # Switzerland County, Indiana, did not observe DST from 1973 through 2005.
848 865 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
849 866 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44
850 867 -6:00 US C%sT 1954 Apr 25 2:00
851 868 -5:00 - EST 1969
852 869 -5:00 US E%sT 1973
853 870 -5:00 - EST 2006
854 871 -5:00 US E%sT
855 872
856 873 # Part of Kentucky left its clocks alone in 1974.
857 874 # This also includes Clark, Floyd, and Harrison counties in Indiana.
858 875 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
859 876 Rule Louisville 1921 only - May 1 2:00 1:00 D
860 877 Rule Louisville 1921 only - Sep 1 2:00 0 S
861 878 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D
862 879 Rule Louisville 1941 only - Sep lastSun 2:00 0 S
863 880 Rule Louisville 1946 only - Jun 2 2:00 0 S
864 881 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
865 882 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S
866 883 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
867 884 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58
868 885 -6:00 US C%sT 1921
869 886 -6:00 Louisville C%sT 1942
870 887 -6:00 US C%sT 1946
871 888 -6:00 Louisville C%sT 1961 Jul 23 2:00
872 889 -5:00 - EST 1968
873 890 -5:00 US E%sT 1974 Jan 6 2:00
874 891 -6:00 1:00 CDT 1974 Oct 27 2:00
875 892 -5:00 US E%sT
876 893 #
877 894 # Wayne County, Kentucky
878 895 #
879 896 # From Lake Cumberland LIFE
880 897 # http://www.lake-cumberland.com/life/archive/news990129time.shtml
881 898 # (1999-01-29) via WKYM-101.7:
882 899 # Clinton County has joined Wayne County in asking the DoT to change from
883 900 # the Central to the Eastern time zone.... The Wayne County government made
884 901 # the same request in December. And while Russell County officials have not
885 902 # taken action, the majority of respondents to a poll conducted there in
886 903 # August indicated they would like to change to "fast time" also.
887 904 # The three Lake Cumberland counties are the farthest east of any U.S.
888 905 # location in the Central time zone.
889 906 #
890 907 # From Rich Wales (2000-08-29):
891 908 # After prolonged debate, and despite continuing deep differences of opinion,
892 909 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
893 910 # (-0500) time. They won't "fall back" this year. See Sara Shipley,
894 911 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
895 912 #
896 913 # From Paul Eggert (2001-07-16):
897 914 # The final rule was published in the
898 915 # Federal Register 65, 160 (2000-08-17), pp 50154-50158.
899 916 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22
900 917 #
901 918 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36
902 919 -6:00 US C%sT 1946
903 920 -6:00 - CST 1968
904 921 -6:00 US C%sT 2000 Oct 29 2:00
905 922 -5:00 US E%sT
906 923
907 924
908 925 # From Rives McDow (2000-08-30):
909 926 # Here ... are all the changes in the US since 1985.
910 927 # Kearny County, KS (put all of county on central;
911 928 # previously split between MST and CST) ... 1990-10
912 929 # Starke County, IN (from CST to EST) ... 1991-10
913 930 # Oliver County, ND (from MST to CST) ... 1992-10
914 931 # West Wendover, NV (from PST TO MST) ... 1999-10
915 932 # Wayne County, KY (from CST to EST) ... 2000-10
916 933 #
917 934 # From Paul Eggert (2001-07-17):
918 935 # We don't know where the line used to be within Kearny County, KS,
919 936 # so omit that change for now.
920 937 # See America/Indiana/Knox for the Starke County, IN change.
921 938 # See America/North_Dakota/Center for the Oliver County, ND change.
922 939 # West Wendover, NV officially switched from Pacific to mountain time on
923 940 # 1999-10-31. See the
924 941 # Federal Register 64, 203 (1999-10-21), pp 56705-56707.
925 942 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15
926 943 # However, the Federal Register says that West Wendover already operated
927 944 # on mountain time, and the rule merely made this official;
928 945 # hence a separate tz entry is not needed.
929 946
930 947 # Michigan
931 948 #
932 949 # From Bob Devine (1988-01-28):
933 950 # Michigan didn't observe DST from 1968 to 1973.
934 951 #
935 952 # From Paul Eggert (1999-03-31):
936 953 # Shanks writes that Michigan started using standard time on 1885-09-18,
937 954 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
938 955 # that Detroit kept
939 956 #
940 957 # local time until 1900 when the City Council decreed that clocks should
941 958 # be put back twenty-eight minutes to Central Standard Time. Half the
942 959 # city obeyed, half refused. After considerable debate, the decision
943 960 # was rescinded and the city reverted to Sun time. A derisive offer to
944 961 # erect a sundial in front of the city hall was referred to the
945 962 # Committee on Sewers. Then, in 1905, Central time was adopted
946 963 # by city vote.
947 964 #
948 965 # This story is too entertaining to be false, so go with Howse over Shanks.
949 966 #
950 967 # From Paul Eggert (2001-03-06):
951 968 # Garland (1927) writes "Cleveland and Detroit advanced their clocks
952 969 # one hour in 1914." This change is not in Shanks. We have no more
953 970 # info, so omit this for now.
954 971 #
955 972 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
956 973 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
957 974 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
958 975 Rule Detroit 1948 only - Sep lastSun 2:00 0 S
959 976 Rule Detroit 1967 only - Jun 14 2:00 1:00 D
960 977 Rule Detroit 1967 only - Oct lastSun 2:00 0 S
961 978 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
962 979 Zone America/Detroit -5:32:11 - LMT 1905
963 980 -6:00 - CST 1915 May 15 2:00
964 981 -5:00 - EST 1942
965 982 -5:00 US E%sT 1946
966 983 -5:00 Detroit E%sT 1973
967 984 -5:00 US E%sT 1975
968 985 -5:00 - EST 1975 Apr 27 2:00
969 986 -5:00 US E%sT
970 987 #
971 988 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
972 989 # switched from EST to CST/CDT in 1973.
973 990 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
974 991 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
975 992 Rule Menominee 1946 only - Sep lastSun 2:00 0 S
976 993 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
977 994 Rule Menominee 1966 only - Oct lastSun 2:00 0 S
978 995 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
979 996 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
980 997 -6:00 US C%sT 1946
981 998 -6:00 Menominee C%sT 1969 Apr 27 2:00
982 999 -5:00 - EST 1973 Apr 29 2:00
983 1000 -6:00 US C%sT
984 1001
985 1002 # Navassa
986 1003 # administered by the US Fish and Wildlife Service
987 1004 # claimed by US under the provisions of the 1856 Guano Islands Act
988 1005 # also claimed by Haiti
989 1006 # occupied 1857/1900 by the Navassa Phosphate Co
990 1007 # US lighthouse 1917/1996-09
991 1008 # currently uninhabited
992 1009 # see Mark Fineman, "An Isle Rich in Guano and Discord",
993 1010 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
994 1011 # Jimmy Skaggs, _The Great Guano Rush_ (1994).
995 1012
996 1013 ################################################################################
997 1014
998 1015
999 1016 # From Paul Eggert (2014-10-31):
1000 1017 #
1001 1018 # Unless otherwise specified, the source for data through 1990 is:
1002 1019 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
1003 1020 # San Diego: ACS Publications, Inc. (2003).
1004 1021 # Unfortunately this book contains many errors and cites no sources.
1005 1022 #
1006 1023 # Gwillim Law writes that a good source
1007 1024 # for recent time zone data is the International Air Transport
1008 1025 # Association's Standard Schedules Information Manual (IATA SSIM),
1009 1026 # published semiannually. Law sent in several helpful summaries
1010 1027 # of the IATA's data after 1990. Except where otherwise noted,
1011 1028 # IATA SSIM is the source for entries after 1990.
1012 1029 #
1013 1030 # Other sources occasionally used include:
1014 1031 #
1015 1032 # Edward W. Whitman, World Time Differences,
1016 1033 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
1017 1034 # which I found in the UCLA library.
1018 1035 #
1019 1036 # William Willett, The Waste of Daylight, 19th edition
1020 1037 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
1021 1038 # [PDF] (1914-03)
1022 1039 #
1023 1040 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1024 1041 # <http://www.jstor.org/stable/1774359>.
1025 1042 #
1026 1043 # See the 'europe' file for Greenland.
1027 1044
1028 1045 # Canada
1029 1046
1030 1047 # From Alain LaBonté (1994-11-14):
1031 1048 # I post here the time zone abbreviations standardized in Canada
1032 1049 # for both English and French in the CAN/CSA-Z234.4-89 standard....
1033 1050 #
1034 1051 # UTC Standard time Daylight saving time
1035 1052 # offset French English French English
1036 1053 # -2:30 - - HAT NDT
1037 1054 # -3 - - HAA ADT
1038 1055 # -3:30 HNT NST - -
1039 1056 # -4 HNA AST HAE EDT
1040 1057 # -5 HNE EST HAC CDT
1041 1058 # -6 HNC CST HAR MDT
1042 1059 # -7 HNR MST HAP PDT
1043 1060 # -8 HNP PST HAY YDT
1044 1061 # -9 HNY YST - -
1045 1062 #
1046 1063 # HN: Heure Normale ST: Standard Time
1047 1064 # HA: Heure Avancée DT: Daylight saving Time
1048 1065 #
1049 1066 # A: de l'Atlantique Atlantic
1050 1067 # C: du Centre Central
1051 1068 # E: de l'Est Eastern
1052 1069 # M: Mountain
1053 1070 # N: Newfoundland
1054 1071 # P: du Pacifique Pacific
1055 1072 # R: des Rocheuses
1056 1073 # T: de Terre-Neuve
1057 1074 # Y: du Yukon Yukon
1058 1075 #
1059 1076 # From Paul Eggert (1994-11-22):
1060 1077 # Alas, this sort of thing must be handled by localization software.
1061 1078
1062 1079 # Unless otherwise specified, the data entries for Canada are all from Shanks
1063 1080 # & Pottenger.
1064 1081
1065 1082 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1066 1083 # 2007-03-01):
1067 1084 # The British Columbia government announced yesterday that it will
1068 1085 # adjust daylight savings next year to align with changes in the
1069 1086 # U.S. and the rest of Canada....
1070 1087 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
1071 1088 # ...
1072 1089 # Nova Scotia
1073 1090 # Daylight saving time will be extended by four weeks starting in 2007....
1074 1091 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf
1075 1092 #
1076 1093 # [For New Brunswick] the new legislation dictates that the time change is to
1077 1094 # be done at 02:00 instead of 00:01.
1078 1095 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
1079 1096 # ...
1080 1097 # Manitoba has traditionally changed the clock every fall at 03:00.
1081 1098 # As of 2006, the transition is to take place one hour earlier at 02:00.
1082 1099 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
1083 1100 # ...
1084 1101 # [Alberta, Ontario, Quebec] will follow US rules.
1085 1102 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
1086 1103 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
1087 1104 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
1088 1105 # ...
1089 1106 # P.E.I. will follow US rules....
1090 1107 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1091 1108 # ...
1092 1109 # Province of Newfoundland and Labrador....
1093 1110 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
1094 1111 # ...
1095 1112 # Yukon
1096 1113 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
1097 1114 # ...
1098 1115 # N.W.T. will follow US rules. Whoever maintains the government web site
1099 1116 # does not seem to believe in bookmarks. To see the news release, click the
1100 1117 # following link and search for "Daylight Savings Time Change". Press the
1101 1118 # "Daylight Savings Time Change" link; it will fire off a popup using
1102 1119 # JavaScript.
1103 1120 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1104 1121 # ...
1105 1122 # Nunavut
1106 1123 # An amendment to the Interpretation Act was registered on February 19/2007....
1107 1124 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
1108 1125
1109 1126 # From Paul Eggert (2014-10-18):
1110 1127 # H. David Matthews and Mary Vincent's map
1111 1128 # "It's about TIME", _Canadian Geographic_ (September-October 1998)
1112 1129 # http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp
1113 1130 # contains detailed boundaries for regions observing nonstandard
1114 1131 # time and daylight saving time arrangements in Canada circa 1998.
1115 1132 #
1116 1133 # National Research Council Canada maintains info about time zones and DST.
1117 1134 # http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
1118 1135 # http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
1119 1136 # Its unofficial information is often taken from Matthews and Vincent.
1120 1137
1121 1138 # From Paul Eggert (2006-06-27):
1122 1139 # For now, assume all of DST-observing Canada will fall into line with the
1123 1140 # new US DST rules,
1124 1141
1125 1142 # From Chris Walton (2011-12-01)
1126 1143 # In the first of Tammy Hardwick's articles
1127 1144 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1128 1145 # she quotes the Friday November 1/1918 edition of the Creston Review.
1129 1146 # The quote includes these two statements:
1130 1147 # 'Sunday the CPR went back to the old system of time...'
1131 1148 # '... The daylight saving scheme was dropped all over Canada at the same time,'
1132 1149 # These statements refer to a transition from daylight time to standard time
1133 1150 # that occurred nationally on Sunday October 27/1918. This transition was
1134 1151 # also documented in the Saturday October 26/1918 edition of the Toronto Star.
1135 1152
1136 1153 # In light of that evidence, we alter the date from the earlier believed
1137 1154 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day
1138 1155 # than Thursday) in all Canadian rulesets.
1139 1156
1140 1157 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1141 1158 Rule Canada 1918 only - Apr 14 2:00 1:00 D
1142 1159 Rule Canada 1918 only - Oct 27 2:00 0 S
1143 1160 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War
1144 1161 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace
1145 1162 Rule Canada 1945 only - Sep 30 2:00 0 S
1146 1163 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
1147 1164 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S
1148 1165 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D
1149 1166 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D
1150 1167 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S
1151 1168
1152 1169
1153 1170 # Newfoundland and Labrador
1154 1171
1155 1172 # From Paul Eggert (2000-10-02):
1156 1173 # Matthews and Vincent (1998) write that Labrador should use NST/NDT,
1157 1174 # but the only part of Labrador that follows the rules is the
1158 1175 # southeast corner, including Port Hope Simpson and Mary's Harbour,
1159 1176 # but excluding, say, Black Tickle.
1160 1177
1161 1178 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1162 1179 Rule StJohns 1917 only - Apr 8 2:00 1:00 D
1163 1180 Rule StJohns 1917 only - Sep 17 2:00 0 S
1164 1181 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
1165 1182 Rule StJohns 1919 only - May 5 23:00 1:00 D
1166 1183 Rule StJohns 1919 only - Aug 12 23:00 0 S
1167 1184 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
1168 1185 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
1169 1186 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
1170 1187 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
1171 1188 # Pottenger.
1172 1189 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D
1173 1190 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S
1174 1191 # Whitman gives the following transitions:
1175 1192 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
1176 1193 # but go with Shanks & Pottenger and assume they used Canadian rules.
1177 1194 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
1178 1195 # Apr 30 - Sep 24; go with Shanks & Pottenger.
1179 1196 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
1180 1197 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
1181 1198 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
1182 1199 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
1183 1200 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S
1184 1201 # From Paul Eggert (2000-10-02):
1185 1202 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
1186 1203 # at 00:01 local time. For now, assume it started in 1987.
1187 1204
1188 1205 # From Michael Pelley (2011-09-12):
1189 1206 # We received today, Monday, September 12, 2011, notification that the
1190 1207 # changes to the Newfoundland Standard Time Act have been proclaimed.
1191 1208 # The change in the Act stipulates that the change from Daylight Savings
1192 1209 # Time to Standard Time and from Standard Time to Daylight Savings Time
1193 1210 # now occurs at 2:00AM.
1194 1211 # ...
1195 1212 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
1196 1213 # ...
1197 1214 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery
1198 1215 # Office of the Chief Information Officer
1199 1216 # Executive Council
1200 1217 # Government of Newfoundland & Labrador
1201 1218
1202 1219 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
1203 1220 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
1204 1221 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
1205 1222 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
1206 1223 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D
1207 1224 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S
1208 1225 #
1209 1226 # St John's has an apostrophe, but Posix file names can't have apostrophes.
1210 1227 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1211 1228 Zone America/St_Johns -3:30:52 - LMT 1884
1212 1229 -3:30:52 StJohns N%sT 1918
1213 1230 -3:30:52 Canada N%sT 1919
1214 1231 -3:30:52 StJohns N%sT 1935 Mar 30
1215 1232 -3:30 StJohns N%sT 1942 May 11
1216 1233 -3:30 Canada N%sT 1946
1217 1234 -3:30 StJohns N%sT 2011 Nov
1218 1235 -3:30 Canada N%sT
1219 1236
1220 1237 # most of east Labrador
1221 1238
1222 1239 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1223 1240 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1224 1241 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
1225 1242 -3:30:52 - NST 1918
1226 1243 -3:30:52 Canada N%sT 1919
1227 1244 -3:30:52 - NST 1935 Mar 30
1228 1245 -3:30 - NST 1936
1229 1246 -3:30 StJohns N%sT 1942 May 11
1230 1247 -3:30 Canada N%sT 1946
1231 1248 -3:30 StJohns N%sT 1966 Mar 15 2:00
1232 1249 -4:00 StJohns A%sT 2011 Nov
1233 1250 -4:00 Canada A%sT
1234 1251
1235 1252
1236 1253 # west Labrador, Nova Scotia, Prince Edward I
1237 1254
1238 1255 # From Brian Inglis (2015-07-20):
1239 1256 # From the historical weather station records available at:
1240 1257 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1241 1258 # Sydney shares the same time history as Glace Bay, so was
1242 1259 # likely to be the same across the island....
1243 1260 # Sydney, as the capital and most populous location, or Cape Breton, would
1244 1261 # have been better names for the zone had we known this in 1996.
1245 1262
1246 1263 # From Paul Eggert (2015-07-20):
1247 1264 # Shanks & Pottenger write that since 1970 most of this region has been like
1248 1265 # Halifax. Many locales did not observe peacetime DST until 1972;
1249 1266 # the Cape Breton area, represented by Glace Bay, is the largest we know of
1250 1267 # (Glace Bay was perhaps not the best name choice but no point changing now).
1251 1268 # Shanks & Pottenger also write that Liverpool, NS was the only town
1252 1269 # in Canada to observe DST in 1971 but not 1970; for now we'll assume
1253 1270 # this is a typo.
1254 1271
1255 1272 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1256 1273 Rule Halifax 1916 only - Apr 1 0:00 1:00 D
1257 1274 Rule Halifax 1916 only - Oct 1 0:00 0 S
1258 1275 Rule Halifax 1920 only - May 9 0:00 1:00 D
1259 1276 Rule Halifax 1920 only - Aug 29 0:00 0 S
1260 1277 Rule Halifax 1921 only - May 6 0:00 1:00 D
1261 1278 Rule Halifax 1921 1922 - Sep 5 0:00 0 S
1262 1279 Rule Halifax 1922 only - Apr 30 0:00 1:00 D
1263 1280 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
1264 1281 Rule Halifax 1923 only - Sep 4 0:00 0 S
1265 1282 Rule Halifax 1924 only - Sep 15 0:00 0 S
1266 1283 Rule Halifax 1925 only - Sep 28 0:00 0 S
1267 1284 Rule Halifax 1926 only - May 16 0:00 1:00 D
1268 1285 Rule Halifax 1926 only - Sep 13 0:00 0 S
1269 1286 Rule Halifax 1927 only - May 1 0:00 1:00 D
1270 1287 Rule Halifax 1927 only - Sep 26 0:00 0 S
1271 1288 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
1272 1289 Rule Halifax 1928 only - Sep 9 0:00 0 S
1273 1290 Rule Halifax 1929 only - Sep 3 0:00 0 S
1274 1291 Rule Halifax 1930 only - Sep 15 0:00 0 S
1275 1292 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
1276 1293 Rule Halifax 1932 only - May 1 0:00 1:00 D
1277 1294 Rule Halifax 1933 only - Apr 30 0:00 1:00 D
1278 1295 Rule Halifax 1933 only - Oct 2 0:00 0 S
1279 1296 Rule Halifax 1934 only - May 20 0:00 1:00 D
1280 1297 Rule Halifax 1934 only - Sep 16 0:00 0 S
1281 1298 Rule Halifax 1935 only - Jun 2 0:00 1:00 D
1282 1299 Rule Halifax 1935 only - Sep 30 0:00 0 S
1283 1300 Rule Halifax 1936 only - Jun 1 0:00 1:00 D
1284 1301 Rule Halifax 1936 only - Sep 14 0:00 0 S
1285 1302 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
1286 1303 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
1287 1304 Rule Halifax 1939 only - May 28 0:00 1:00 D
1288 1305 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
1289 1306 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
1290 1307 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
1291 1308 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
1292 1309 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
1293 1310 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
1294 1311 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
1295 1312 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
1296 1313 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
1297 1314 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1298 1315 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
1299 1316 -4:00 Halifax A%sT 1918
1300 1317 -4:00 Canada A%sT 1919
1301 1318 -4:00 Halifax A%sT 1942 Feb 9 2:00s
1302 1319 -4:00 Canada A%sT 1946
1303 1320 -4:00 Halifax A%sT 1974
1304 1321 -4:00 Canada A%sT
1305 1322 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
1306 1323 -4:00 Canada A%sT 1953
1307 1324 -4:00 Halifax A%sT 1954
1308 1325 -4:00 - AST 1972
1309 1326 -4:00 Halifax A%sT 1974
1310 1327 -4:00 Canada A%sT
1311 1328
1312 1329 # New Brunswick
1313 1330
1314 1331 # From Paul Eggert (2007-01-31):
1315 1332 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1316 1333 # says they changed at 00:01 through 2006, and
1317 1334 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1318 1335 # clear that this was the case since at least 1993.
1319 1336 # For now, assume it started in 1993.
1320 1337
1321 1338 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1322 1339 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D
1323 1340 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S
1324 1341 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D
1325 1342 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S
1326 1343 Rule Moncton 1939 only - May 27 1:00 1:00 D
1327 1344 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S
1328 1345 Rule Moncton 1940 only - May 19 1:00 1:00 D
1329 1346 Rule Moncton 1941 only - May 4 1:00 1:00 D
1330 1347 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
1331 1348 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
1332 1349 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
1333 1350 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
1334 1351 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
1335 1352 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1336 1353 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
1337 1354 -5:00 - EST 1902 Jun 15
1338 1355 -4:00 Canada A%sT 1933
1339 1356 -4:00 Moncton A%sT 1942
1340 1357 -4:00 Canada A%sT 1946
1341 1358 -4:00 Moncton A%sT 1973
1342 1359 -4:00 Canada A%sT 1993
1343 1360 -4:00 Moncton A%sT 2007
1344 1361 -4:00 Canada A%sT
1345 1362
1346 1363 # Quebec
1347 1364
1348 1365 # From Paul Eggert (2015-03-24):
1349 1366 # See America/Toronto for most of Quebec, including Montreal.
1350 1367 #
1351 1368 # Matthews and Vincent (1998) also write that Quebec east of the -63
1352 1369 # meridian is supposed to observe AST, but residents as far east as
1353 1370 # Natashquan use EST/EDT, and residents east of Natashquan use AST.
1354 1371 # The Quebec department of justice writes in
1355 1372 # "The situation in Minganie and Basse-Côte-Nord"
1356 1373 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1357 1374 # that the coastal strip from just east of Natashquan to Blanc-Sablon
1358 1375 # observes Atlantic standard time all year round.
1359 1376 # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1360 1377 # says this common practice was codified into law as of 2007.
1361 1378 # For lack of better info, guess this practice began around 1970, contra to
1362 1379 # Shanks & Pottenger who have this region observing AST/ADT.
1363 1380
1364 1381 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1365 1382 Zone America/Blanc-Sablon -3:48:28 - LMT 1884
1366 1383 -4:00 Canada A%sT 1970
1367 1384 -4:00 - AST
1368 1385
1369 1386 # Ontario
1370 1387
1371 1388 # From Paul Eggert (2006-07-09):
1372 1389 # Shanks & Pottenger write that since 1970 most of Ontario has been like
1373 1390 # Toronto.
1374 1391 # Thunder Bay skipped DST in 1973.
1375 1392 # Many smaller locales did not observe peacetime DST until 1974;
1376 1393 # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1377 1394 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1378 1395
1379 1396 # From Mark Brader (2003-07-26):
1380 1397 # [According to the Toronto Star] Orillia, Ontario, adopted DST
1381 1398 # effective Saturday, 1912-06-22, 22:00; the article mentions that
1382 1399 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1383 1400 # have already done so. In Orillia DST was to run until Saturday,
1384 1401 # 1912-08-31 (no time mentioned), but it was met with considerable
1385 1402 # hostility from certain segments of the public, and was revoked after
1386 1403 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1387 1404 # presumably that should be -07-06. (1912-06-19, -07-12; also letters
1388 1405 # earlier in June).
1389 1406 #
1390 1407 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1391 1408
1392 1409 # From Paul Eggert (1997-10-17):
1393 1410 # Mark Brader writes that an article in the 1997-10-14 Toronto Star
1394 1411 # says that Atikokan, Ontario currently does not observe DST,
1395 1412 # but will vote on 11-10 whether to use EST/EDT.
1396 1413 # He also writes that the Ontario Time Act (1990, Chapter T.9)
1397 1414 # http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html
1398 1415 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
1399 1416 # Officially Atikokan is therefore on CST/CDT, and most likely this report
1400 1417 # concerns a non-official time observed as a matter of local practice.
1401 1418 #
1402 1419 # From Paul Eggert (2000-10-02):
1403 1420 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
1404 1421 # New Osnaburgh observe CST all year, that Big Trout Lake observes
1405 1422 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
1406 1423 # violation of the official Ontario rules.
1407 1424 #
1408 1425 # From Paul Eggert (2006-07-09):
1409 1426 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
1410 1427 # 2005-07-21 Chronicle-Journal, which said:
1411 1428 #
1412 1429 # The clocks in Atikokan stay set on standard time year-round.
1413 1430 # This means they spend about half the time on central time and
1414 1431 # the other half on eastern time.
1415 1432 #
1416 1433 # For the most part, the system works, Mayor Dennis Brown said.
1417 1434 #
1418 1435 # "The majority of businesses in Atikokan deal more with Eastern
1419 1436 # Canada, but there are some that deal with Western Canada," he
1420 1437 # said. "I don't see any changes happening here."
1421 1438 #
1422 1439 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
1423 1440 # [New Osnaburgh] follow the same practice."
1424 1441
1425 1442 # From Garry McKinnon (2006-07-14) via Chris Walton:
1426 1443 # I chatted with a member of my board who has an outstanding memory
1427 1444 # and a long history in Atikokan (and in the telecom industry) and he
1428 1445 # can say for certain that Atikokan has been practicing the current
1429 1446 # time keeping since 1952, at least.
1430 1447
1431 1448 # From Paul Eggert (2006-07-17):
1432 1449 # Shanks & Pottenger say that Atikokan has agreed with Rainy River
1433 1450 # ever since standard time was introduced, but the information from
1434 1451 # McKinnon sounds more authoritative. For now, assume that Atikokan
1435 1452 # switched to EST immediately after WWII era daylight saving time
1436 1453 # ended. This matches the old (less-populous) America/Coral_Harbour
1437 1454 # entry since our cutoff date of 1970, so we can move
1438 1455 # America/Coral_Harbour to the 'backward' file.
1439 1456
1440 1457 # From Mark Brader (2010-03-06):
1441 1458 #
1442 1459 # Currently the database has:
1443 1460 #
1444 1461 # # Ontario
1445 1462 #
1446 1463 # # From Paul Eggert (2006-07-09):
1447 1464 # # Shanks & Pottenger write that since 1970 most of Ontario has been like
1448 1465 # # Toronto.
1449 1466 # # Thunder Bay skipped DST in 1973.
1450 1467 # # Many smaller locales did not observe peacetime DST until 1974;
1451 1468 # # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1452 1469 #
1453 1470 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
1454 1471 # right corner of page 1, it says that Toronto will return to standard
1455 1472 # time at 2 am Sunday morning (which agrees with the database), and that:
1456 1473 #
1457 1474 # The one-hour setback will go into effect throughout most of Ontario,
1458 1475 # except in areas like Windsor which remains on standard time all year.
1459 1476 #
1460 1477 # Windsor is, of course, a lot larger than Nipigon.
1461 1478 #
1462 1479 # I only came across this incidentally. I don't know if Windsor began
1463 1480 # observing DST when Detroit did, or in 1974, or on some other date.
1464 1481 #
1465 1482 # By the way, the article continues by noting that:
1466 1483 #
1467 1484 # Some cities in the United States have pushed the deadline back
1468 1485 # three weeks and will change over from daylight saving in October.
1469 1486
1470 1487 # From Arthur David Olson (2010-07-17):
1471 1488 #
1472 1489 # "Standard Time and Time Zones in Canada" appeared in
1473 1490 # The Journal of The Royal Astronomical Society of Canada,
1474 1491 # volume 26, number 2 (February 1932) and, as of 2010-07-17,
1475 1492 # was available at
1476 1493 # http://adsabs.harvard.edu/full/1932JRASC..26...49S
1477 1494 #
1478 1495 # It includes the text below (starting on page 57):
1479 1496 #
1480 1497 # A list of the places in Canada using daylight saving time would
1481 1498 # require yearly revision. From information kindly furnished by
1482 1499 # the provincial governments and by the postmasters in many cities
1483 1500 # and towns, it is found that the following places used daylight sav-
1484 1501 # ing in 1930. The information for the province of Quebec is definite,
1485 1502 # for the other provinces only approximate:
1486 1503 #
1487 1504 # Province Daylight saving time used
1488 1505 # Prince Edward Island Not used.
1489 1506 # Nova Scotia In Halifax only.
1490 1507 # New Brunswick In St. John only.
1491 1508 # Quebec In the following places:
1492 1509 # Montreal Lachine
1493 1510 # Quebec Mont-Royal
1494 1511 # Lévis Iberville
1495 1512 # St. Lambert Cap de la Madelèine
1496 1513 # Verdun Loretteville
1497 1514 # Westmount Richmond
1498 1515 # Outremont St. Jérôme
1499 1516 # Longueuil Greenfield Park
1500 1517 # Arvida Waterloo
1501 1518 # Chambly-Canton Beaulieu
1502 1519 # Melbourne La Tuque
1503 1520 # St. Théophile Buckingham
1504 1521 # Ontario Used generally in the cities and towns along
1505 1522 # the southerly part of the province. Not
1506 1523 # used in the northwesterly part.
1507 1524 # Manitoba Not used.
1508 1525 # Saskatchewan In Regina only.
1509 1526 # Alberta Not used.
1510 1527 # British Columbia Not used.
1511 1528 #
1512 1529 # With some exceptions, the use of daylight saving may be said to be limited
1513 1530 # to those cities and towns lying between Quebec city and Windsor, Ont.
1514 1531
1515 1532 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1516 1533 Rule Toronto 1919 only - Mar 30 23:30 1:00 D
1517 1534 Rule Toronto 1919 only - Oct 26 0:00 0 S
1518 1535 Rule Toronto 1920 only - May 2 2:00 1:00 D
1519 1536 Rule Toronto 1920 only - Sep 26 0:00 0 S
1520 1537 Rule Toronto 1921 only - May 15 2:00 1:00 D
1521 1538 Rule Toronto 1921 only - Sep 15 2:00 0 S
1522 1539 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D
1523 1540 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1524 1541 # was meant.
1525 1542 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S
1526 1543 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
1527 1544 # The 1927-to-1939 rules can be expressed more simply as
1528 1545 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S
1529 1546 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D
1530 1547 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D
1531 1548 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S
1532 1549 # The rules below avoid use of Sun>=25
1533 1550 # (which pre-2004 versions of zic cannot handle).
1534 1551 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S
1535 1552 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D
1536 1553 Rule Toronto 1932 only - May 1 2:00 1:00 D
1537 1554 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D
1538 1555 Rule Toronto 1933 only - Oct 1 2:00 0 S
1539 1556 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S
1540 1557 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S
1541 1558 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D
1542 1559 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D
1543 1560 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S
1544 1561 Rule Toronto 1949 only - Nov lastSun 0:00 0 S
1545 1562 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D
1546 1563 Rule Toronto 1950 only - Nov lastSun 2:00 0 S
1547 1564 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S
1548 1565 # Shanks & Pottenger say Toronto ended DST a week early in 1971,
1549 1566 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1550 1567 # is wrong, and that he had confirmed it by checking the 1971-10-30
1551 1568 # Toronto Star, which said that DST was ending 1971-10-31 as usual.
1552 1569 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S
1553 1570
1554 1571 # From Paul Eggert (2003-07-27):
1555 1572 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1556 1573 # Port Arthur, Ontario, the principle of the Bill has been in
1557 1574 # operation for the past three years, and in the City of Moose Jaw,
1558 1575 # Saskatchewan, for one year."
1559 1576
1560 1577 # From David Bryan via Tory Tronrud, Director/Curator,
1561 1578 # Thunder Bay Museum (2003-11-12):
1562 1579 # There is some suggestion, however, that, by-law or not, daylight
1563 1580 # savings time was being practiced in Fort William and Port Arthur
1564 1581 # before 1909.... [I]n 1910, the line between the Eastern and Central
1565 1582 # Time Zones was permanently moved about two hundred miles west to
1566 1583 # include the Thunder Bay area.... When Canada adopted daylight
1567 1584 # savings time in 1916, Fort William and Port Arthur, having done so
1568 1585 # already, did not change their clocks.... During the Second World
1569 1586 # War,... [t]he cities agreed to implement DST during the summer
1570 1587 # months for the remainder of the war years.
1571 1588
1572 1589 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1573 1590 Zone America/Toronto -5:17:32 - LMT 1895
1574 1591 -5:00 Canada E%sT 1919
1575 1592 -5:00 Toronto E%sT 1942 Feb 9 2:00s
1576 1593 -5:00 Canada E%sT 1946
1577 1594 -5:00 Toronto E%sT 1974
1578 1595 -5:00 Canada E%sT
1579 1596 Zone America/Thunder_Bay -5:57:00 - LMT 1895
1580 1597 -6:00 - CST 1910
1581 1598 -5:00 - EST 1942
1582 1599 -5:00 Canada E%sT 1970
1583 1600 -5:00 Toronto E%sT 1973
1584 1601 -5:00 - EST 1974
1585 1602 -5:00 Canada E%sT
1586 1603 Zone America/Nipigon -5:53:04 - LMT 1895
1587 1604 -5:00 Canada E%sT 1940 Sep 29
1588 1605 -5:00 1:00 EDT 1942 Feb 9 2:00s
1589 1606 -5:00 Canada E%sT
1590 1607 Zone America/Rainy_River -6:18:16 - LMT 1895
1591 1608 -6:00 Canada C%sT 1940 Sep 29
1592 1609 -6:00 1:00 CDT 1942 Feb 9 2:00s
1593 1610 -6:00 Canada C%sT
1594 1611 Zone America/Atikokan -6:06:28 - LMT 1895
1595 1612 -6:00 Canada C%sT 1940 Sep 29
1596 1613 -6:00 1:00 CDT 1942 Feb 9 2:00s
1597 1614 -6:00 Canada C%sT 1945 Sep 30 2:00
1598 1615 -5:00 - EST
1599 1616
1600 1617
1601 1618 # Manitoba
1602 1619
1603 1620 # From Rob Douglas (2006-04-06):
1604 1621 # the old Manitoba Time Act - as amended by Bill 2, assented to
1605 1622 # March 27, 1987 ... said ...
1606 1623 # "between two o'clock Central Standard Time in the morning of
1607 1624 # the first Sunday of April of each year and two o'clock Central
1608 1625 # Standard Time in the morning of the last Sunday of October next
1609 1626 # following, one hour in advance of Central Standard Time."...
1610 1627 # I believe that the English legislation [of the old time act] had
1611 1628 # been assented to (March 22, 1967)....
1612 1629 # Also, as far as I can tell, there was no order-in-council varying
1613 1630 # the time of Daylight Saving Time for 2005 and so the provisions of
1614 1631 # the 1987 version would apply - the changeover was at 2:00 Central
1615 1632 # Standard Time (i.e. not until 3:00 Central Daylight Time).
1616 1633
1617 1634 # From Paul Eggert (2006-04-10):
1618 1635 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
1619 1636 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume
1620 1637 # it was also 02:00s in 1966.
1621 1638
1622 1639 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1623 1640 Rule Winn 1916 only - Apr 23 0:00 1:00 D
1624 1641 Rule Winn 1916 only - Sep 17 0:00 0 S
1625 1642 Rule Winn 1918 only - Apr 14 2:00 1:00 D
1626 1643 Rule Winn 1918 only - Oct 27 2:00 0 S
1627 1644 Rule Winn 1937 only - May 16 2:00 1:00 D
1628 1645 Rule Winn 1937 only - Sep 26 2:00 0 S
1629 1646 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War
1630 1647 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace
1631 1648 Rule Winn 1945 only - Sep lastSun 2:00 0 S
1632 1649 Rule Winn 1946 only - May 12 2:00 1:00 D
1633 1650 Rule Winn 1946 only - Oct 13 2:00 0 S
1634 1651 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
1635 1652 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
1636 1653 Rule Winn 1950 only - May 1 2:00 1:00 D
1637 1654 Rule Winn 1950 only - Sep 30 2:00 0 S
1638 1655 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
1639 1656 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
1640 1657 Rule Winn 1959 only - Oct lastSun 2:00 0 S
1641 1658 Rule Winn 1960 only - Sep lastSun 2:00 0 S
1642 1659 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
1643 1660 Rule Winn 1963 only - Sep 22 2:00 0 S
1644 1661 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D
1645 1662 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S
1646 1663 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
1647 1664 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1648 1665 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
1649 1666 -6:00 Winn C%sT 2006
1650 1667 -6:00 Canada C%sT
1651 1668
1652 1669
1653 1670 # Saskatchewan
1654 1671
1655 1672 # From Mark Brader (2003-07-26):
1656 1673 # The first actual adoption of DST in Canada was at the municipal
1657 1674 # level. As the [Toronto] Star put it (1912-06-07), "While people
1658 1675 # elsewhere have long been talking of legislation to save daylight,
1659 1676 # the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1660 1677 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1661 1678 # presumably late evening, as below), and would run until "the end of
1662 1679 # the summer". The discrepancy between municipal time and railroad
1663 1680 # time was noted.
1664 1681
1665 1682 # From Paul Eggert (2003-07-27):
1666 1683 # Willett (1914-03) notes that DST "has been in operation ... in the
1667 1684 # City of Moose Jaw, Saskatchewan, for one year."
1668 1685
1669 1686 # From Paul Eggert (2006-03-22):
1670 1687 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1671 1688 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1672 1689 # Other western towns (e.g. Lloydminster) are like Edmonton.
1673 1690 # Matthews and Vincent (1998) write that Denare Beach and Creighton
1674 1691 # are like Winnipeg, in violation of Saskatchewan law.
1675 1692
1676 1693 # From W. Jones (1992-11-06):
1677 1694 # The. . .below is based on information I got from our law library, the
1678 1695 # provincial archives, and the provincial Community Services department.
1679 1696 # A precise history would require digging through newspaper archives, and
1680 1697 # since you didn't say what you wanted, I didn't bother.
1681 1698 #
1682 1699 # Saskatchewan is split by a time zone meridian (105W) and over the years
1683 1700 # the boundary became pretty ragged as communities near it reevaluated
1684 1701 # their affiliations in one direction or the other. In 1965 a provincial
1685 1702 # referendum favoured legislating common time practices.
1686 1703 #
1687 1704 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1688 1705 # Saskatchewan 1978) was proclaimed, and established that the eastern
1689 1706 # part of Saskatchewan would use CST year round, that districts in
1690 1707 # northwest Saskatchewan would by default follow CST but could opt to
1691 1708 # follow Mountain Time rules (thus 1 hour difference in the winter and
1692 1709 # zero in the summer), and that districts in southwest Saskatchewan would
1693 1710 # by default follow MT but could opt to follow CST.
1694 1711 #
1695 1712 # It took a few years for the dust to settle (I know one story of a town
1696 1713 # on one time zone having its school in another, such that a mom had to
1697 1714 # serve her family lunch in two shifts), but presently it seems that only
1698 1715 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT
1699 1716 # rules any more; all other districts appear to have used CST year round
1700 1717 # since sometime in the 1960s.
1701 1718
1702 1719 # From Chris Walton (2006-06-26):
1703 1720 # The Saskatchewan time act which was last updated in 1996 is about 30 pages
1704 1721 # long and rather painful to read.
1705 1722 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
1706 1723
1707 1724 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1708 1725 Rule Regina 1918 only - Apr 14 2:00 1:00 D
1709 1726 Rule Regina 1918 only - Oct 27 2:00 0 S
1710 1727 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
1711 1728 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
1712 1729 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
1713 1730 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
1714 1731 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
1715 1732 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
1716 1733 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War
1717 1734 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace
1718 1735 Rule Regina 1945 only - Sep lastSun 2:00 0 S
1719 1736 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
1720 1737 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
1721 1738 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D
1722 1739 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S
1723 1740 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D
1724 1741 Rule Regina 1959 only - Oct lastSun 2:00 0 S
1725 1742 #
1726 1743 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
1727 1744 Rule Swift 1957 only - Oct lastSun 2:00 0 S
1728 1745 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
1729 1746 Rule Swift 1959 only - Oct lastSun 2:00 0 S
1730 1747 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
1731 1748 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1732 1749 Zone America/Regina -6:58:36 - LMT 1905 Sep
1733 1750 -7:00 Regina M%sT 1960 Apr lastSun 2:00
1734 1751 -6:00 - CST
1735 1752 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
1736 1753 -7:00 Canada M%sT 1946 Apr lastSun 2:00
1737 1754 -7:00 Regina M%sT 1950
1738 1755 -7:00 Swift M%sT 1972 Apr lastSun 2:00
1739 1756 -6:00 - CST
1740 1757
1741 1758
1742 1759 # Alberta
1743 1760
1744 1761 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1745 1762 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
1746 1763 Rule Edm 1918 only - Oct 27 2:00 0 S
1747 1764 Rule Edm 1919 only - May 27 2:00 0 S
1748 1765 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
1749 1766 Rule Edm 1920 only - Oct lastSun 2:00 0 S
1750 1767 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
1751 1768 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War
1752 1769 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace
1753 1770 Rule Edm 1945 only - Sep lastSun 2:00 0 S
1754 1771 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
1755 1772 Rule Edm 1947 only - Sep lastSun 2:00 0 S
1756 1773 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
1757 1774 Rule Edm 1967 only - Oct lastSun 2:00 0 S
1758 1775 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
1759 1776 Rule Edm 1969 only - Oct lastSun 2:00 0 S
1760 1777 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
1761 1778 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S
1762 1779 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1763 1780 Zone America/Edmonton -7:33:52 - LMT 1906 Sep
1764 1781 -7:00 Edm M%sT 1987
1765 1782 -7:00 Canada M%sT
1766 1783
1767 1784
1768 1785 # British Columbia
1769 1786
1770 1787 # From Paul Eggert (2006-03-22):
1771 1788 # Shanks & Pottenger write that since 1970 most of this region has
1772 1789 # been like Vancouver.
1773 1790 # Dawson Creek uses MST. Much of east BC is like Edmonton.
1774 1791 # Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1775 1792
1776 1793 # It seems though that (re: Creston) is not entirely correct:
1777 1794
1778 1795 # From Chris Walton (2011-12-01):
1779 1796 # There are two areas within the Canadian province of British Columbia
1780 1797 # that do not currently observe daylight saving:
1781 1798 # a) The Creston Valley (includes the town of Creston and surrounding area)
1782 1799 # b) The eastern half of the Peace River Regional District
1783 1800 # (includes the cities of Dawson Creek and Fort St. John)
1784 1801
1785 1802 # Earlier this year I stumbled across a detailed article about the time
1786 1803 # keeping history of Creston; it was written by Tammy Hardwick who is the
1787 1804 # manager of the Creston & District Museum. The article was written in May 2009.
1788 1805 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1789 1806 # According to the article, Creston has not changed its clocks since June 1918.
1790 1807 # i.e. Creston has been stuck on UTC-7 for 93 years.
1791 1808 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972.
1792 1809
1793 1810 # Unfortunately the exact date for the time change in June 1918 remains
1794 1811 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months
1795 1812 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just
1796 1813 # as plausible as any other date (in June). She also said that after writing
1797 1814 # the article she had discovered another time change in 1916; this is the
1798 1815 # subject of another article which she wrote in October 2010.
1799 1816 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56
1800 1817
1801 1818 # Here is a summary of the three clock change events in Creston's history:
1802 1819 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7)
1803 1820 # Exact date unknown
1804 1821 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8)
1805 1822 # Exact date in October unknown; Sunday October 1 is a reasonable guess.
1806 1823 # 3. June 1918: switch to Pacific Daylight Time (GMT-7)
1807 1824 # Exact date in June unknown; Sunday June 2 is a reasonable guess.
1808 1825 # note 1:
1809 1826 # On Oct 27/1918 when daylight saving ended in the rest of Canada,
1810 1827 # Creston did not change its clocks.
1811 1828 # note 2:
1812 1829 # During WWII when the Federal Government legislated a mandatory clock change,
1813 1830 # Creston did not oblige.
1814 1831 # note 3:
1815 1832 # There is no guarantee that Creston will remain on Mountain Standard Time
1816 1833 # (UTC-7) forever.
1817 1834 # The subject was debated at least once this year by the town Council.
1818 1835 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html
1819 1836
1820 1837 # During a period WWII, summer time (Daylight saying) was mandatory in Canada.
1821 1838 # In Creston, that was handled by shifting the area to PST (-8:00) then applying
1822 1839 # summer time to cause the offset to be -7:00, the same as it had been before
1823 1840 # the change. It can be argued that the timezone abbreviation during this
1824 1841 # period should be PDT rather than MST, but that doesn't seem important enough
1825 1842 # (to anyone) to further complicate the rules.
1826 1843
1827 1844 # The transition dates (and times) are guesses.
1828 1845
1829 1846 # From Matt Johnson (2015-09-21):
1830 1847 # Fort Nelson, BC, Canada will cancel DST this year. So while previously they
1831 1848 # were aligned with America/Vancouver, they're now aligned with
1832 1849 # America/Dawson_Creek.
1833 1850 # http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html
1834 1851 #
1835 1852 # From Tim Parenti (2015-09-23):
1836 1853 # This requires a new zone for the Northern Rockies Regional Municipality,
1837 1854 # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a
1838 1855 # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has
1839 1856 # been on MST (-0700) like Dawson Creek since it advanced its clocks on
1840 1857 # 2015-03-08.
1841 1858 #
1842 1859 # From Paul Eggert (2015-09-23):
1843 1860 # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
1844 1861
1845 1862 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1846 1863 Rule Vanc 1918 only - Apr 14 2:00 1:00 D
1847 1864 Rule Vanc 1918 only - Oct 27 2:00 0 S
1848 1865 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
1849 1866 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
1850 1867 Rule Vanc 1945 only - Sep 30 2:00 0 S
1851 1868 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
1852 1869 Rule Vanc 1946 only - Oct 13 2:00 0 S
1853 1870 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
1854 1871 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
1855 1872 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1856 1873 Zone America/Vancouver -8:12:28 - LMT 1884
1857 1874 -8:00 Vanc P%sT 1987
1858 1875 -8:00 Canada P%sT
1859 1876 Zone America/Dawson_Creek -8:00:56 - LMT 1884
1860 1877 -8:00 Canada P%sT 1947
1861 1878 -8:00 Vanc P%sT 1972 Aug 30 2:00
1862 1879 -7:00 - MST
1863 1880 Zone America/Fort_Nelson -8:10:47 - LMT 1884
1864 1881 -8:00 Vanc P%sT 1946
1865 1882 -8:00 - PST 1947
1866 1883 -8:00 Vanc P%sT 1987
1867 1884 -8:00 Canada P%sT 2015 Mar 8 2:00
1868 1885 -7:00 - MST
1869 1886 Zone America/Creston -7:46:04 - LMT 1884
1870 1887 -7:00 - MST 1916 Oct 1
1871 1888 -8:00 - PST 1918 Jun 2
1872 1889 -7:00 - MST
1873 1890
1874 1891 # Northwest Territories, Nunavut, Yukon
1875 1892
1876 1893 # From Paul Eggert (2006-03-22):
1877 1894 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
1878 1895 # Mathew Englander (1996-10-07) gives the following refs:
1879 1896 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1880 1897 # c. 7 defines Yukon standard time as UTC-9....
1881 1898 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1882 1899 # [http://canlii.ca/t/7vhg]
1883 1900 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1884 1901 # * O.I.C. 1980/02 established DST.
1885 1902 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1886 1903
1887 1904 # From Brian Inglis (2015-04-14):
1888 1905 #
1889 1906 # I tried to trace the history of Yukon time and found the following
1890 1907 # regulations, giving the reference title and URL if found, regulation name,
1891 1908 # and relevant quote if available. Each regulation specifically revokes its
1892 1909 # predecessor. The final reference is to the current Interpretation Act
1893 1910 # authorizing and resulting from these regulatory changes.
1894 1911 #
1895 1912 # Only recent regulations were retrievable via Yukon government site search or
1896 1913 # index, and only some via Canadian legal sources. Other sources used include
1897 1914 # articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS
1898 1915 # Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and
1899 1916 # 1970 quoted below; each article includes current extracts from provincial
1900 1917 # and territorial ST and DST regulations at the end, summaries and details of
1901 1918 # standard times and daylight saving time at many locations across Canada,
1902 1919 # with time zone maps, tables and calculations for Canadian Sunrise, Sunset,
1903 1920 # and LMST; they also cover many countries and global locations, with a chart
1904 1921 # and table showing current Universal Time offsets, and may be useful as
1905 1922 # another source of information for 1970 and earlier.
1906 1923 #
1907 1924 # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
1908 1925 # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
1909 1926 # http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
1910 1927 # Yukon Interpretation Ordinance
1911 1928 # Yukon standard time is the local mean time at the one hundred and
1912 1929 # thirty-fifth meridian.
1913 1930 #
1914 1931 # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
1915 1932 # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
1916 1933 # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
1917 1934 # Yukon Interpretation Ordinance, 1955, Chap. 16.
1918 1935 #
1919 1936 # (1) Subject to this section, standard time shall be reckoned as nine
1920 1937 # hours behind Greenwich Time and called Yukon Standard Time.
1921 1938 #
1922 1939 # (2) Notwithstanding subsection (1), the Commissioner may make regulations
1923 1940 # varying the manner of reckoning standard time.
1924 1941 #
1925 1942 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
1926 1943 # http://? - no online source found
1927 1944 #
1928 1945 # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
1929 1946 # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
1930 1947 # http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
1931 1948 # Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
1932 1949 #
1933 1950 # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
1934 1951 # Territory on 27th January, 1966, is hereby revoked.
1935 1952 #
1936 1953 # 2. Yukon (East) Standard Time as defined by section 36 of the
1937 1954 # Interpretation Ordinance from and after mid-night on the 28th day of May,
1938 1955 # 1967 shall be reckoned in the same manner as Pacific Standard Time, that
1939 1956 # is to say, eight hours behind Greenwich Time in the area of the Yukon
1940 1957 # Territory lying east of the 138th degree longitude west.
1941 1958 #
1942 1959 # 3. In the remainder of the Territory, lying west of the 138th degree
1943 1960 # longitude west, Yukon (West) Standard Time shall be reckoned as nine
1944 1961 # hours behind Greenwich Time.
1945 1962 #
1946 1963 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
1947 1964 # http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
1948 1965 # C.O. 1973/214 INTERPRETATION ACT ...
1949 1966 #
1950 1967 # 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
1951 1968 # revoked.
1952 1969 #
1953 1970 # 2. Yukon Standard Time as defined by section 36 of the Interpretation
1954 1971 # Act from and after midnight on the twenty-eighth day of October, 1973
1955 1972 # shall be reckoned in the same manner as Pacific Standard Time, that is
1956 1973 # to say eight hours behind Greenwich Time.
1957 1974 #
1958 1975 # * O.I.C. 1980/02 INTERPRETATION ACT
1959 1976 # http://? - no online source found
1960 1977 #
1961 1978 # * Yukon Daylight Saving Time, YOIC 1987/56
1962 1979 # http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
1963 1980 # O.I.C. 1987/056 INTERPRETATION ACT ...
1964 1981 #
1965 1982 # In every year between
1966 1983 # (a) two o'clock in the morning in the first Sunday in April, and
1967 1984 # (b) two o'clock in the morning in the last Sunday in October,
1968 1985 # Standard Time shall be reckoned as seven hours behind Greenwich Time and
1969 1986 # called Yukon Daylight Saving Time.
1970 1987 # ...
1971 1988 # Dated ... 9th day of March, A.D., 1987.
1972 1989 #
1973 1990 # * Yukon Daylight Saving Time 2006, YOIC 2006/127
1974 1991 # http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
1975 1992 # O.I.C. 2006/127 INTERPRETATION ACT ...
1976 1993 #
1977 1994 # 1. In Yukon each year the time for general purposes shall be 7 hours
1978 1995 # behind Greenwich mean time during the period commencing at two o'clock
1979 1996 # in the forenoon on the second Sunday of March and ending at two o'clock
1980 1997 # in the forenoon on the first Sunday of November and shall be called
1981 1998 # Yukon Daylight Saving Time.
1982 1999 #
1983 2000 # 2. Order-in-Council 1987/56 is revoked.
1984 2001 #
1985 2002 # 3. This order comes into force January 1, 2007.
1986 2003 #
1987 2004 # * Interpretation Act, RSY 2002, c 125
1988 2005 # http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
1989 2006
1990 2007 # From Rives McDow (1999-09-04):
1991 2008 # Nunavut ... moved ... to incorporate the whole territory into one time zone.
1992 2009 # Nunavut moves to single time zone Oct. 31
1993 2010 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html
1994 2011 #
1995 2012 # From Antoine Leca (1999-09-06):
1996 2013 # We then need to create a new timezone for the Kitikmeot region of Nunavut
1997 2014 # to differentiate it from the Yellowknife region.
1998 2015
1999 2016 # From Paul Eggert (1999-09-20):
2000 2017 # Basic Facts: The New Territory
2001 2018 # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html
2002 2019 # (1999) reports that Pangnirtung operates on eastern time,
2003 2020 # and that Coral Harbour does not observe DST. We don't know when
2004 2021 # Pangnirtung switched to eastern time; we'll guess 1995.
2005 2022
2006 2023 # From Rives McDow (1999-11-08):
2007 2024 # On October 31, when the rest of Nunavut went to Central time,
2008 2025 # Pangnirtung wobbled. Here is the result of their wobble:
2009 2026 #
2010 2027 # The following businesses and organizations in Pangnirtung use Central Time:
2011 2028 #
2012 2029 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
2013 2030 # Eastern Arctic National Parks, A & D Specialist
2014 2031 #
2015 2032 # The following businesses and organizations in Pangnirtung use Eastern Time:
2016 2033 #
2017 2034 # Hamlet office, All other businesses, Both schools, Airport operator
2018 2035 #
2019 2036 # This has made for an interesting situation there, which warranted the news.
2020 2037 # No one there that I spoke with seems concerned, or has plans to
2021 2038 # change the local methods of keeping time, as it evidently does not
2022 2039 # really interfere with any activities or make things difficult locally.
2023 2040 # They plan to celebrate New Year's turn-over twice, one hour apart,
2024 2041 # so it appears that the situation will last at least that long.
2025 2042 # The Nunavut Intergovernmental Affairs hopes that they will "come to
2026 2043 # their senses", but the locals evidently don't see any problem with
2027 2044 # the current state of affairs.
2028 2045
2029 2046 # From Michaela Rodrigue, writing in the
2030 2047 # Nunatsiaq News (1999-11-19):
2031 2048 # http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html
2032 2049 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
2033 2050 # central - or Nunavut time - for government offices, and eastern time
2034 2051 # for municipal offices and schools.... Igloolik [was similar but then]
2035 2052 # made the switch to central time on Saturday, Nov. 6.
2036 2053
2037 2054 # From Paul Eggert (2000-10-02):
2038 2055 # Matthews and Vincent (1998) say the following, but we lack histories
2039 2056 # for these potential new Zones.
2040 2057 #
2041 2058 # The Canadian Forces station at Alert uses Eastern Time while the
2042 2059 # handful of residents at the Eureka weather station [in the Central
2043 2060 # zone] skip daylight savings. Baffin Island, which is crossed by the
2044 2061 # Central, Eastern and Atlantic Time zones only uses Eastern Time.
2045 2062 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
2046 2063 # Central Time and Southampton Island [in the Central zone] is not
2047 2064 # required to use daylight savings.
2048 2065
2049 2066 # From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html>
2050 2067 # Nunavut now has two time zones (2000-11-10):
2051 2068 # The Nunavut government would allow its employees in Kugluktuk and
2052 2069 # Cambridge Bay to operate on central time year-round, putting them
2053 2070 # one hour behind the rest of Nunavut for six months during the winter.
2054 2071 # At the end of October the two communities had rebelled against
2055 2072 # Nunavut's unified time zone, refusing to shift to eastern time with
2056 2073 # the rest of the territory for the winter. Cambridge Bay remained on
2057 2074 # central time, while Kugluktuk, even farther west, reverted to
2058 2075 # mountain time, which they had used before the advent of Nunavut's
2059 2076 # unified time zone in 1999.
2060 2077 #
2061 2078 # From Rives McDow (2001-01-20), quoting the Nunavut government:
2062 2079 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
2063 2080
2064 2081 # From Paul Eggert (2000-12-04):
2065 2082 # Let's just keep track of the official times for now.
2066 2083
2067 2084 # From Rives McDow (2001-03-07):
2068 2085 # The premier of Nunavut has issued a ministerial statement advising
2069 2086 # that effective 2001-04-01, the territory of Nunavut will revert
2070 2087 # back to three time zones (mountain, central, and eastern). Of the
2071 2088 # cities in Nunavut, Coral Harbor is the only one that I know of that
2072 2089 # has said it will not observe dst, staying on EST year round. I'm
2073 2090 # checking for more info, and will get back to you if I come up with
2074 2091 # more.
2075 2092 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
2076 2093
2077 2094 # From Gwillim Law (2005-05-21):
2078 2095 # According to ...
2079 2096 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
2080 2097 # (from a 1998 Canadian Geographic article), the de facto and de jure time
2081 2098 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
2082 2099 # round. Using Google, it's easy to find other websites that confirm this.
2083 2100 # I wasn't able to find how far back this time regimen goes, but since it
2084 2101 # predates the creation of Nunavut, it probably goes back many years....
2085 2102 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
2086 2103 #
2087 2104 # From Paul Eggert (2014-10-17):
2088 2105 # For lack of better information, assume that Southampton Island observed
2089 2106 # daylight saving only during wartime. Gwillim Law's email also
2090 2107 # mentioned maps now maintained by National Research Council Canada;
2091 2108 # see above for an up-to-date link.
2092 2109
2093 2110 # From Chris Walton (2007-03-01):
2094 2111 # ... the community of Resolute (located on Cornwallis Island in
2095 2112 # Nunavut) moved from Central Time to Eastern Time last November.
2096 2113 # Basically the community did not change its clocks at the end of
2097 2114 # daylight saving....
2098 2115 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
2099 2116
2100 2117 # From Chris Walton (2011-03-21):
2101 2118 # Back in 2007 I initiated the creation of a new "zone file" for Resolute
2102 2119 # Bay. Resolute Bay is a small community located about 900km north of
2103 2120 # the Arctic Circle. The zone file was required because Resolute Bay had
2104 2121 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2105 2122 #
2106 2123 # According to new information which I received last week, Resolute Bay
2107 2124 # went back to using UTC-6 in the winter of 2007-2008...
2108 2125 #
2109 2126 # On March 11/2007 most of Canada went onto daylight saving. On March
2110 2127 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
2111 2128 # talked to somebody that was both knowledgeable and helpful. I was able
2112 2129 # to confirm that Resolute Bay was still operating on UTC-5. It was
2113 2130 # explained to me that Resolute Bay had been on the Eastern Time zone
2114 2131 # (EST) in the winter, and was now back on the Central Time zone (CDT).
2115 2132 # i.e. the time zone had changed twice in the last year but the clocks
2116 2133 # had not moved. The residents had to know which time zone they were in
2117 2134 # so they could follow the correct TV schedule...
2118 2135 #
2119 2136 # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I
2120 2137 # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature
2121 2138 # of the phone call, I decided to seek out an alternate source of
2122 2139 # information. I found an e-mail address for somebody by the name of
2123 2140 # Stephanie Adams whose job was listed as "Inns North Support Officer for
2124 2141 # Arctic Co-operatives." I was under the impression that Stephanie lived
2125 2142 # and worked in Resolute Bay...
2126 2143 #
2127 2144 # On March 14/2011 I phoned the hamlet office again. I was told that
2128 2145 # Resolute Bay had been using Central Standard Time over the winter of
2129 2146 # 2010-2011 and that the clocks had therefore been moved one hour ahead
2130 2147 # on March 13/2011. The person I talked to was aware that Resolute Bay
2131 2148 # had previously experimented with Eastern Standard Time but he could not
2132 2149 # tell me when the practice had stopped.
2133 2150 #
2134 2151 # On March 17/2011 I searched the Web to find an e-mail address of
2135 2152 # somebody that might be able to tell me exactly when Resolute Bay went
2136 2153 # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz
2137 2154 # used to be the mayor of Resolute Bay and he apparently owns half the
2138 2155 # businesses including "South Camp Inn." This website has some info on
2139 2156 # Aziz:
2140 2157 # http://www.uphere.ca/node/493
2141 2158 #
2142 2159 # I sent Aziz an e-mail asking when Resolute Bay had stopped using
2143 2160 # Eastern Standard Time.
2144 2161 #
2145 2162 # Aziz responded quickly with this: "hi, The time was not changed for the
2146 2163 # 1 year only, the following year, the community went back to the old way
2147 2164 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in
2148 2165 # the winter Zulu plus 6 hrs"
2149 2166 #
2150 2167 # This of course conflicted with everything I had ascertained in November 2008.
2151 2168 #
2152 2169 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz
2153 2170 # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You
2154 2171 # may want to check with the weather office in Resolute Bay or do a
2155 2172 # search on the weather through Env. Canada. web site"
2156 2173 #
2157 2174 # If I had realized the Stephanie did not live in Resolute Bay I would
2158 2175 # never have contacted her. I now believe that all the information I
2159 2176 # obtained in November 2008 should be ignored...
2160 2177 # I apologize for reporting incorrect information in 2008.
2161 2178
2162 2179 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2163 2180 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
2164 2181 Rule NT_YK 1918 only - Oct 27 2:00 0 S
2165 2182 Rule NT_YK 1919 only - May 25 2:00 1:00 D
2166 2183 Rule NT_YK 1919 only - Nov 1 0:00 0 S
2167 2184 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
2168 2185 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
2169 2186 Rule NT_YK 1945 only - Sep 30 2:00 0 S
2170 2187 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
2171 2188 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
2172 2189 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
2173 2190 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S
2174 2191 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
2175 2192 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2176 2193 # aka Panniqtuuq
2177 2194 Zone America/Pangnirtung 0 - zzz 1921 # trading post est.
2178 2195 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
2179 2196 -5:00 Canada E%sT 1999 Oct 31 2:00
2180 2197 -6:00 Canada C%sT 2000 Oct 29 2:00
2181 2198 -5:00 Canada E%sT
2182 2199 # formerly Frobisher Bay
2183 2200 Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est.
2184 2201 -5:00 NT_YK E%sT 1999 Oct 31 2:00
2185 2202 -6:00 Canada C%sT 2000 Oct 29 2:00
2186 2203 -5:00 Canada E%sT
2187 2204 # aka Qausuittuq
2188 2205 Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded
2189 2206 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2190 2207 -5:00 - EST 2001 Apr 1 3:00
2191 2208 -6:00 Canada C%sT 2006 Oct 29 2:00
2192 2209 -5:00 - EST 2007 Mar 11 3:00
2193 2210 -6:00 Canada C%sT
2194 2211 # aka Kangiqiniq
2195 2212 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded
2196 2213 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2197 2214 -5:00 - EST 2001 Apr 1 3:00
2198 2215 -6:00 Canada C%sT
2199 2216 # aka Iqaluktuuttiaq
2200 2217 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.?
2201 2218 -7:00 NT_YK M%sT 1999 Oct 31 2:00
2202 2219 -6:00 Canada C%sT 2000 Oct 29 2:00
2203 2220 -5:00 - EST 2000 Nov 5 0:00
2204 2221 -6:00 - CST 2001 Apr 1 3:00
2205 2222 -7:00 Canada M%sT
2206 2223 Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded?
2207 2224 -7:00 NT_YK M%sT 1980
2208 2225 -7:00 Canada M%sT
2209 2226 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded
2210 2227 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
2211 2228 -7:00 NT_YK M%sT 1980
2212 2229 -7:00 Canada M%sT
2213 2230 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
2214 2231 -9:00 NT_YK Y%sT 1967 May 28 0:00
2215 2232 -8:00 NT_YK P%sT 1980
2216 2233 -8:00 Canada P%sT
2217 2234 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
2218 2235 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
2219 2236 -8:00 NT_YK P%sT 1980
2220 2237 -8:00 Canada P%sT
2221 2238
2222 2239
2223 2240 ###############################################################################
2224 2241
2225 2242 # Mexico
2226 2243
2227 2244 # From Paul Eggert (2014-12-07):
2228 2245 # The Investigation and Analysis Service of the
2229 2246 # Mexican Library of Congress (MLoC) has published a
2230 2247 # history of Mexican local time (in Spanish)
2231 2248 # http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm
2232 2249 #
2233 2250 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
2234 2251 # (In all cases we go with the MLoC.)
2235 2252 # S&P report that Baja was at -8:00 in 1922/1923.
2236 2253 # S&P say the 1930 transition in Baja was 1930-11-16.
2237 2254 # S&P report no DST during summer 1931.
2238 2255 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
2239 2256
2240 2257 # From Gwillim Law (2001-02-20):
2241 2258 # There are some other discrepancies between the Decrees page and the
2242 2259 # tz database. I think they can best be explained by supposing that
2243 2260 # the researchers who prepared the Decrees page failed to find some of
2244 2261 # the relevant documents.
2245 2262
2246 2263 # From Alan Perry (1996-02-15):
2247 2264 # A guy from our Mexico subsidiary finally found the Presidential Decree
2248 2265 # outlining the timezone changes in Mexico.
2249 2266 #
2250 2267 # ------------- Begin Forwarded Message -------------
2251 2268 #
2252 2269 # I finally got my hands on the Official Presidential Decree that sets up the
2253 2270 # rules for the DST changes. The rules are:
2254 2271 #
2255 2272 # 1. The country is divided in 3 timezones:
2256 2273 # - Baja California Norte (the Mexico/BajaNorte TZ)
2257 2274 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
2258 2275 # - The rest of the country (the Mexico/General TZ)
2259 2276 #
2260 2277 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
2261 2278 # at 2:00 AM, the times in each zone are as follows:
2262 2279 # BajaNorte: GMT+7
2263 2280 # BajaSur: GMT+6
2264 2281 # General: GMT+5
2265 2282 #
2266 2283 # 3. The rest of the year, the times are as follows:
2267 2284 # BajaNorte: GMT+8
2268 2285 # BajaSur: GMT+7
2269 2286 # General: GMT+6
2270 2287 #
2271 2288 # The Decree was published in Mexico's Official Newspaper on January 4th.
2272 2289 #
2273 2290 # -------------- End Forwarded Message --------------
2274 2291 # From Paul Eggert (1996-06-12):
2275 2292 # For an English translation of the decree, see
2276 2293 # "Diario Oficial: Time Zone Changeover" (1996-01-04).
2277 2294 # http://mexico-travel.com/extra/timezone_eng.html
2278 2295
2279 2296 # From Rives McDow (1998-10-08):
2280 2297 # The State of Quintana Roo has reverted back to central STD and DST times
2281 2298 # (i.e. UTC -0600 and -0500 as of 1998-08-02).
2282 2299
2283 2300 # From Rives McDow (2000-01-10):
2284 2301 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
2285 2302 # zone 5 hours from the International Date Line, and will not observe daylight
2286 2303 # savings time so as to stay on the same time zone as the southern part of
2287 2304 # Arizona year round.
2288 2305
2289 2306 # From Jesper Nørgaard, translating
2290 2307 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
2291 2308 # In Oaxaca, the 55.000 teachers from the Section 22 of the National
2292 2309 # Syndicate of Education Workers, refuse to apply daylight saving each
2293 2310 # year, so that the more than 10,000 schools work at normal hour the
2294 2311 # whole year.
2295 2312
2296 2313 # From Gwillim Law (2001-01-19):
2297 2314 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
2298 2315 # (translated):...
2299 2316 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
2300 2317 # that Summer Time will be reduced from seven to five months, starting
2301 2318 # this year....
2302 2319 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
2303 2320 # [translated], says "summer time will ... take effect on the first Sunday
2304 2321 # in May, and end on the last Sunday of September.
2305 2322
2306 2323 # From Arthur David Olson (2001-01-25):
2307 2324 # The 2001-01-24 traditional Washington Post contained the page one
2308 2325 # story "Timely Issue Divides Mexicans."...
2309 2326 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2310 2327 # ... Mexico City Mayor López Obrador "...is threatening to keep
2311 2328 # Mexico City and its 20 million residents on a different time than
2312 2329 # the rest of the country..." In particular, López Obrador would abolish
2313 2330 # observation of Daylight Saving Time.
2314 2331
2315 2332 # Official statute published by the Energy Department
2316 2333 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
2317 2334 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2318 2335 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03).
2319 2336
2320 2337 # From Paul Eggert (2001-03-03):
2321 2338 #
2322 2339 # http://www.latimes.com/news/nation/20010303/t000018766.html
2323 2340 # James F. Smith writes in today's LA Times
2324 2341 # * Sonora will continue to observe standard time.
2325 2342 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that
2326 2343 # the Federal District will not adopt DST.
2327 2344 # * 4 of 16 district leaders announced they'll ignore the decree.
2328 2345 # * The decree does not affect federal-controlled facilities including
2329 2346 # the airport, banks, hospitals, and schools.
2330 2347 #
2331 2348 # For now we'll assume that the Federal District will bow to federal rules.
2332 2349
2333 2350 # From Jesper Nørgaard (2001-04-01):
2334 2351 # I found some references to the Mexican application of daylight
2335 2352 # saving, which modifies what I had already sent you, stating earlier
2336 2353 # that a number of northern Mexican states would go on daylight
2337 2354 # saving. The modification reverts this to only cover Baja California
2338 2355 # (Norte), while all other states (except Sonora, who has no daylight
2339 2356 # saving all year) will follow the original decree of president
2340 2357 # Vicente Fox, starting daylight saving May 6, 2001 and ending
2341 2358 # September 30, 2001.
2342 2359 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>
2343 2360 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
2344 2361
2345 2362 # From Reuters (2001-09-04):
2346 2363 # Mexico's Supreme Court on Tuesday declared that daylight savings was
2347 2364 # unconstitutional in Mexico City, creating the possibility the
2348 2365 # capital will be in a different time zone from the rest of the nation
2349 2366 # next year.... The Supreme Court's ruling takes effect at 2:00
2350 2367 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
2351 2368 # standard time. "This is so residents of the Federal District are not
2352 2369 # subject to unexpected time changes," a statement from the court said.
2353 2370
2354 2371 # From Jesper Nørgaard Welen (2002-03-12):
2355 2372 # ... consulting my local grocery store(!) and my coworkers, they all insisted
2356 2373 # that a new decision had been made to reinstate US style DST in Mexico....
2357 2374 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
2358 2375 # confirms this. Sonora as usual is the only state where DST is not applied.
2359 2376
2360 2377 # From Steffen Thorsen (2009-12-28):
2361 2378 #
2362 2379 # Steffen Thorsen wrote:
2363 2380 # > Mexico's House of Representatives has approved a proposal for northern
2364 2381 # > Mexico's border cities to share the same daylight saving schedule as
2365 2382 # > the United States.
2366 2383 # Now this has passed both the Congress and the Senate, so starting from
2367 2384 # 2010, some border regions will be the same:
2368 2385 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
2369 2386 # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939
2370 2387 # (Spanish)
2371 2388 #
2372 2389 # Could not find the new law text, but the proposed law text changes are here:
2373 2390 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2374 2391 # (Gaceta Parlamentaria)
2375 2392 #
2376 2393 # There is also a list of the votes here:
2377 2394 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2378 2395 #
2379 2396 # Our page:
2380 2397 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html
2381 2398
2382 2399 # From Arthur David Olson (2010-01-20):
2383 2400 # The page
2384 2401 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2385 2402 # includes this text:
2386 2403 # En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2387 2404 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila;
2388 2405 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en
2389 2406 # Tamaulipas, la aplicación de este horario estacional surtirá efecto
2390 2407 # desde las dos horas del segundo domingo de marzo y concluirá a las dos
2391 2408 # horas del primer domingo de noviembre.
2392 2409 # En los municipios fronterizos que se encuentren ubicados en la franja
2393 2410 # fronteriza norte en el territorio comprendido entre la línea
2394 2411 # internacional y la línea paralela ubicada a una distancia de veinte
2395 2412 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el
2396 2413 # interior del país, la aplicación de este horario estacional surtirá
2397 2414 # efecto desde las dos horas del segundo domingo de marzo y concluirá a
2398 2415 # las dos horas del primer domingo de noviembre.
2399 2416
2400 2417 # From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
2401 2418 # The Mexican state of Quintana Roo will likely change to EST in 2015.
2402 2419 #
2403 2420 # http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
2404 2421 # "With this change, the time conflict that has existed between the municipios
2405 2422 # of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an
2406 2423 # end. The latter declared itself in rebellion 15 years ago when a time change
2407 2424 # was initiated in Mexico, and since then it has refused to change its time
2408 2425 # zone along with the rest of the country."
2409 2426 #
2410 2427 # From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
2411 2428 # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html
2412 2429 # "...the new time zone will come into effect at two o'clock on the first Sunday
2413 2430 # of February, when we will have to advance the clock one hour from its current
2414 2431 # time..."
2415 2432 # Also, the new zone will not use DST.
2416 2433 #
2417 2434 # From Carlos Raúl Perasso (2015-02-02):
2418 2435 # The decree that modifies the Mexican Hour System Law has finally
2419 2436 # been published at the Diario Oficial de la Federación
2420 2437 # http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015
2421 2438 # It establishes 5 zones for Mexico:
2422 2439 # 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
2423 2440 # includes most of Mexico, excluding what's mentioned below.
2424 2441 # 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the
2425 2442 # states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía
2426 2443 # de Banderas which lies in Central Zone); Sinaloa and Sonora.
2427 2444 # 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
2428 2445 # state of Baja California.
2429 2446 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2430 2447 # of Quintana Roo.
2431 2448 # 5- The islands, reefs and keys shall take their timezone from the
2432 2449 # longitude they are located at.
2433 2450
2434 2451 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2435 2452 Rule Mexico 1939 only - Feb 5 0:00 1:00 D
2436 2453 Rule Mexico 1939 only - Jun 25 0:00 0 S
2437 2454 Rule Mexico 1940 only - Dec 9 0:00 1:00 D
2438 2455 Rule Mexico 1941 only - Apr 1 0:00 0 S
2439 2456 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
2440 2457 Rule Mexico 1944 only - May 1 0:00 0 S
2441 2458 Rule Mexico 1950 only - Feb 12 0:00 1:00 D
2442 2459 Rule Mexico 1950 only - Jul 30 0:00 0 S
2443 2460 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2444 2461 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2445 2462 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2446 2463 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2447 2464 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
2448 2465 Rule Mexico 2002 max - Oct lastSun 2:00 0 S
2449 2466 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2450 2467 # Quintana Roo; represented by Cancún
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2451 2468 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
2452 2469 -6:00 - CST 1981 Dec 23
2453 2470 -5:00 Mexico E%sT 1998 Aug 2 2:00
2454 2471 -6:00 Mexico C%sT 2015 Feb 1 2:00
2455 2472 -5:00 - EST
2456 2473 # Campeche, Yucatán; represented by Mérida
2457 2474 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
2458 2475 -6:00 - CST 1981 Dec 23
2459 2476 -5:00 - EST 1982 Dec 2
2460 2477 -6:00 Mexico C%sT
2461 -# Coahuila, Durango, Nuevo León, Tamaulipas (near US border)
2478 +# Coahuila, Nuevo León, Tamaulipas (near US border)
2462 2479 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00
2463 2480 -6:00 - CST 1988
2464 2481 -6:00 US C%sT 1989
2465 2482 -6:00 Mexico C%sT 2010
2466 2483 -6:00 US C%sT
2467 -# Coahuila, Durango, Nuevo León, Tamaulipas (away from US border)
2484 +# Durango; Coahuila, Nuevo León, Tamaulipas (away from US border)
2468 2485 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
2469 2486 -6:00 - CST 1988
2470 2487 -6:00 US C%sT 1989
2471 2488 -6:00 Mexico C%sT
2472 2489 # Central Mexico
2473 2490 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
2474 2491 -7:00 - MST 1927 Jun 10 23:00
2475 2492 -6:00 - CST 1930 Nov 15
2476 2493 -7:00 - MST 1931 May 1 23:00
2477 2494 -6:00 - CST 1931 Oct
2478 2495 -7:00 - MST 1932 Apr 1
2479 2496 -6:00 Mexico C%sT 2001 Sep 30 2:00
2480 2497 -6:00 - CST 2002 Feb 20
2481 2498 -6:00 Mexico C%sT
2482 2499 # Chihuahua (near US border)
2483 2500 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20
2484 2501 -7:00 - MST 1927 Jun 10 23:00
2485 2502 -6:00 - CST 1930 Nov 15
2486 2503 -7:00 - MST 1931 May 1 23:00
2487 2504 -6:00 - CST 1931 Oct
2488 2505 -7:00 - MST 1932 Apr 1
2489 2506 -6:00 - CST 1996
2490 2507 -6:00 Mexico C%sT 1998
2491 2508 -6:00 - CST 1998 Apr Sun>=1 3:00
2492 2509 -7:00 Mexico M%sT 2010
2493 2510 -7:00 US M%sT
2494 2511 # Chihuahua (away from US border)
2495 2512 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
2496 2513 -7:00 - MST 1927 Jun 10 23:00
2497 2514 -6:00 - CST 1930 Nov 15
2498 2515 -7:00 - MST 1931 May 1 23:00
2499 2516 -6:00 - CST 1931 Oct
2500 2517 -7:00 - MST 1932 Apr 1
2501 2518 -6:00 - CST 1996
2502 2519 -6:00 Mexico C%sT 1998
2503 2520 -6:00 - CST 1998 Apr Sun>=1 3:00
2504 2521 -7:00 Mexico M%sT
2505 2522 # Sonora
2506 2523 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08
2507 2524 -7:00 - MST 1927 Jun 10 23:00
2508 2525 -6:00 - CST 1930 Nov 15
2509 2526 -7:00 - MST 1931 May 1 23:00
2510 2527 -6:00 - CST 1931 Oct
2511 2528 -7:00 - MST 1932 Apr 1
2512 2529 -6:00 - CST 1942 Apr 24
2513 2530 -7:00 - MST 1949 Jan 14
2514 2531 -8:00 - PST 1970
2515 2532 -7:00 Mexico M%sT 1999
2516 2533 -7:00 - MST
2517 2534
2518 2535 # From Alexander Krivenyshev (2010-04-21):
2519 2536 # According to news, Bahía de Banderas (Mexican state of Nayarit)
2520 2537 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
2521 2538 # share the same time zone as nearby city Puerto Vallarta, Jalisco).
2522 2539 #
2523 2540 # (Spanish)
2524 2541 # Bahía de Banderas homologa su horario al del centro del
2525 2542 # país, a partir de este domingo
2526 2543 # http://www.nayarit.gob.mx/notes.asp?id=20748
2527 2544 #
2528 2545 # Bahía de Banderas homologa su horario con el del Centro del
2529 2546 # País
2530 2547 # 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
2531 2548 #
2532 2549 # (English)
2533 2550 # Puerto Vallarta and Bahía de Banderas: One Time Zone
2534 2551 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml
2535 2552 # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html
2536 2553 #
2537 2554 # "Mexico's Senate approved the amendments to the Mexican Schedule System that
2538 2555 # will allow Bahía de Banderas and Puerto Vallarta to share the same time
2539 2556 # zone ..."
2540 2557 # Baja California Sur, Nayarit, Sinaloa
2541 2558
2542 2559 # From Arthur David Olson (2010-05-01):
2543 2560 # Use "Bahia_Banderas" to keep the name to fourteen characters.
2544 2561
2545 2562 # Mazatlán
2546 2563 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
2547 2564 -7:00 - MST 1927 Jun 10 23:00
2548 2565 -6:00 - CST 1930 Nov 15
2549 2566 -7:00 - MST 1931 May 1 23:00
2550 2567 -6:00 - CST 1931 Oct
2551 2568 -7:00 - MST 1932 Apr 1
2552 2569 -6:00 - CST 1942 Apr 24
2553 2570 -7:00 - MST 1949 Jan 14
2554 2571 -8:00 - PST 1970
2555 2572 -7:00 Mexico M%sT
2556 2573
2557 2574 # Bahía de Banderas
2558 2575 Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00
2559 2576 -7:00 - MST 1927 Jun 10 23:00
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2560 2577 -6:00 - CST 1930 Nov 15
2561 2578 -7:00 - MST 1931 May 1 23:00
2562 2579 -6:00 - CST 1931 Oct
2563 2580 -7:00 - MST 1932 Apr 1
2564 2581 -6:00 - CST 1942 Apr 24
2565 2582 -7:00 - MST 1949 Jan 14
2566 2583 -8:00 - PST 1970
2567 2584 -7:00 Mexico M%sT 2010 Apr 4 2:00
2568 2585 -6:00 Mexico C%sT
2569 2586
2570 -# Baja California (near US border)
2587 +# Baja California
2571 2588 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
2572 2589 -7:00 - MST 1924
2573 2590 -8:00 - PST 1927 Jun 10 23:00
2574 2591 -7:00 - MST 1930 Nov 15
2575 2592 -8:00 - PST 1931 Apr 1
2576 2593 -8:00 1:00 PDT 1931 Sep 30
2577 2594 -8:00 - PST 1942 Apr 24
2578 2595 -8:00 1:00 PWT 1945 Aug 14 23:00u
2579 2596 -8:00 1:00 PPT 1945 Nov 12 # Peace
2580 2597 -8:00 - PST 1948 Apr 5
2581 2598 -8:00 1:00 PDT 1949 Jan 14
2582 2599 -8:00 - PST 1954
2583 2600 -8:00 CA P%sT 1961
2584 2601 -8:00 - PST 1976
2585 2602 -8:00 US P%sT 1996
2586 2603 -8:00 Mexico P%sT 2001
2587 2604 -8:00 US P%sT 2002 Feb 20
2588 2605 -8:00 Mexico P%sT 2010
2589 2606 -8:00 US P%sT
2590 -# Baja California (away from US border)
2591 -Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32
2592 - -7:00 - MST 1924
2593 - -8:00 - PST 1927 Jun 10 23:00
2594 - -7:00 - MST 1930 Nov 15
2595 - -8:00 - PST 1931 Apr 1
2596 - -8:00 1:00 PDT 1931 Sep 30
2597 - -8:00 - PST 1942 Apr 24
2598 - -8:00 1:00 PWT 1945 Aug 14 23:00u
2599 - -8:00 1:00 PPT 1945 Nov 12 # Peace
2600 - -8:00 - PST 1948 Apr 5
2601 - -8:00 1:00 PDT 1949 Jan 14
2602 - -8:00 - PST 1954
2603 - -8:00 CA P%sT 1961
2604 - -8:00 - PST 1976
2605 - -8:00 US P%sT 1996
2606 - -8:00 Mexico P%sT 2001
2607 - -8:00 US P%sT 2002 Feb 20
2608 - -8:00 Mexico P%sT
2609 2607 # From Paul Eggert (2006-03-22):
2610 2608 # Formerly there was an America/Ensenada zone, which differed from
2611 2609 # America/Tijuana only in that it did not observe DST from 1976
2612 2610 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say
2613 2611 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports
2614 2612 # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and
2615 2613 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
2616 2614 # DST-observance was a town-by-town matter back then. This concerns
2617 2615 # data after 1970 so most likely there should be at least one Zone
2618 2616 # other than America/Tijuana for Baja, but it's not clear yet what its
2619 2617 # name or contents should be.
2620 2618 #
2619 +# From Paul Eggert (2015-10-08):
2620 +# Formerly there was an America/Santa_Isabel zone, but this appears to
2621 +# have come from a misreading of
2622 +# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2623 +# It has been moved to the 'backward' file.
2624 +#
2625 +#
2621 2626 # Revillagigedo Is
2622 2627 # no information
2623 2628
2624 2629 ###############################################################################
2625 2630
2626 2631 # Anguilla
2627 2632 # Antigua and Barbuda
2628 2633 # See America/Port_of_Spain.
2629 2634
2630 2635 # Bahamas
2631 2636 #
2632 2637 # For 1899 Milne gives -5:09:29.5; round that.
2633 2638 #
2634 2639 # From Sue Williams (2006-12-07):
2635 2640 # The Bahamas announced about a month ago that they plan to change their DST
2636 2641 # rules to sync with the U.S. starting in 2007....
2637 2642 # http://www.jonesbahamas.com/?c=45&a=10412
2638 2643
2639 2644 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2640 2645 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S
2641 2646 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D
2642 2647 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2643 2648 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2
2644 2649 -5:00 Bahamas E%sT 1976
2645 2650 -5:00 US E%sT
2646 2651
2647 2652 # Barbados
2648 2653
2649 2654 # For 1899 Milne gives -3:58:29.2; round that.
2650 2655
2651 2656 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2652 2657 Rule Barb 1977 only - Jun 12 2:00 1:00 D
2653 2658 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
2654 2659 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
2655 2660 Rule Barb 1979 only - Sep 30 2:00 0 S
2656 2661 Rule Barb 1980 only - Sep 25 2:00 0 S
2657 2662 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2658 2663 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown
2659 2664 -3:58:29 - BMT 1932 # Bridgetown Mean Time
2660 2665 -4:00 Barb A%sT
2661 2666
2662 2667 # Belize
2663 2668 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2664 2669 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2665 2670 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
2666 2671 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
2667 2672 Rule Belize 1973 only - Dec 5 0:00 1:00 D
2668 2673 Rule Belize 1974 only - Feb 9 0:00 0 S
2669 2674 Rule Belize 1982 only - Dec 18 0:00 1:00 D
2670 2675 Rule Belize 1983 only - Feb 12 0:00 0 S
2671 2676 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2672 2677 Zone America/Belize -5:52:48 - LMT 1912 Apr
2673 2678 -6:00 Belize C%sT
2674 2679
2675 2680 # Bermuda
2676 2681
2677 2682 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2678 2683 # Bermuda dockyard, Ireland I; round that.
2679 2684
2680 2685 # From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2681 2686
2682 2687 # Next year, however, clocks in the US will go forward on the second Sunday
2683 2688 # in March, until the first Sunday in November. And, after the Time Zone
2684 2689 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
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2685 2690 # Friday, the same thing will happen in Bermuda.
2686 2691 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2687 2692
2688 2693 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2689 2694 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton
2690 2695 -4:00 - AST 1974 Apr 28 2:00
2691 2696 -4:00 Canada A%sT 1976
2692 2697 -4:00 US A%sT
2693 2698
2694 2699 # Cayman Is
2700 +# See America/Panama.
2695 2701
2696 -# From Paul Eggert (2015-05-15):
2697 -# The Cayman government has decided to introduce DST in 2016, the idea being
2698 -# to keep in sync with New York. The legislation hasn't passed but the change
2699 -# seems quite likely. See: Meade B. Cayman 27.
2700 -# http://www.cayman27.com.ky/2015/05/15/clock-ticks-toward-daylight-saving-time-in-cayman
2701 -
2702 -Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
2703 - -5:07:11 - KMT 1912 Feb # Kingston Mean Time
2704 - -5:00 - EST 2016
2705 - -5:00 US E%sT
2706 -
2707 2702 # Costa Rica
2708 2703
2709 2704 # Milne gives -5:36:13.3 as San José mean time; round to nearest.
2710 2705
2711 2706 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2712 2707 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
2713 2708 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
2714 2709 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
2715 2710 # IATA SSIM (1991-09) says the following was at 1:00;
2716 2711 # go with Shanks & Pottenger.
2717 2712 Rule CR 1991 only - Jul 1 0:00 0 S
2718 2713 Rule CR 1992 only - Mar 15 0:00 0 S
2719 2714 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
2720 2715 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2721 2716 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José
2722 2717 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time
2723 2718 -6:00 CR C%sT
2724 2719 # Coco
2725 2720 # no information; probably like America/Costa_Rica
2726 2721
2727 2722 # Cuba
2728 2723
2729 2724 # From Paul Eggert (2013-02-21):
2730 2725 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
2731 2726 # for the port, and -5:30 for meteorological observations.
2732 2727 # For now, stick with Shanks & Pottenger.
2733 2728
2734 2729 # From Arthur David Olson (1999-03-29):
2735 2730 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2736 2731 # the Cuban National Team and the Baltimore Orioles was carried live on
2737 2732 # the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2738 2733 # During the game, play-by-play announcer Jim Hunter noted that
2739 2734 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2740 2735 # Time today." (The "two hour" remark referred to losing one hour of
2741 2736 # sleep on 1999-03-28 - when the announcers were in Cuba as it switched
2742 2737 # to DST - and one more hour on 1999-04-04 - when the announcers will have
2743 2738 # returned to Baltimore, which switches on that date.)
2744 2739
2745 2740 # From Steffen Thorsen (2013-11-11):
2746 2741 # DST start in Cuba in 2004 ... does not follow the same rules as the
2747 2742 # years before. The correct date should be Sunday 2004-03-28 00:00 ...
2748 2743 # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html
2749 2744
2750 2745 # From Evert van der Veer via Steffen Thorsen (2004-10-28):
2751 2746 # Cuba is not going back to standard time this year.
2752 2747 # From Paul Eggert (2006-03-22):
2753 2748 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
2754 2749 # says that it's due to a problem at the Antonio Guiteras
2755 2750 # thermoelectric plant, and says "This October there will be no return
2756 2751 # to normal hours (after daylight saving time)".
2757 2752 # For now, let's assume that it's a temporary measure.
2758 2753
2759 2754 # From Carlos A. Carnero Delgado (2005-11-12):
2760 2755 # This year (just like in 2004-2005) there's no change in time zone
2761 2756 # adjustment in Cuba. We will stay in daylight saving time:
2762 2757 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
2763 2758
2764 2759 # From Jesper Nørgaard Welen (2006-10-21):
2765 2760 # An article in GRANMA INTERNACIONAL claims that Cuba will end
2766 2761 # the 3 years of permanent DST next weekend, see
2767 2762 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
2768 2763 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
2769 2764 # watches should be set back one hour - going back to 00:00 hours - returning
2770 2765 # to the normal schedule....
2771 2766
2772 2767 # From Paul Eggert (2007-03-02):
2773 2768 # <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday,
2774 2769 # says Cuban clocks will advance at midnight on March 10.
2775 2770 # For lack of better information, assume Cuba will use US rules,
2776 2771 # except that it switches at midnight standard time as usual.
2777 2772 #
2778 2773 # From Steffen Thorsen (2007-10-25):
2779 2774 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
2780 2775 # earlier - on the last Sunday of October, just like in 2006.
2781 2776 #
2782 2777 # He supplied these references:
2783 2778 #
2784 2779 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES
2785 2780 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
2786 2781 #
2787 2782 # From Alex Krivenyshev (2007-10-25):
2788 2783 # Here is also article from Granma (Cuba):
2789 2784 #
2790 2785 # Regirá el Horario Normal desde el próximo domingo 28 de octubre
2791 2786 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
2792 2787 #
2793 2788 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html
2794 2789
2795 2790 # From Arthur David Olson (2008-03-09):
2796 2791 # I'm in Maryland which is now observing United States Eastern Daylight
2797 2792 # Time. At 9:44 local time I used RealPlayer to listen to
2798 2793 # http://media.enet.cu/radioreloj
2799 2794 # a Cuban information station, and heard
2800 2795 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
2801 2796 # indicating that Cuba is still on standard time.
2802 2797
2803 2798 # From Steffen Thorsen (2008-03-12):
2804 2799 # It seems that Cuba will start DST on Sunday, 2007-03-16...
2805 2800 # It was announced yesterday, according to this source (in Spanish):
2806 2801 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2807 2802 #
2808 2803 # Some more background information is posted here:
2809 2804 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2810 2805 #
2811 2806 # The article also says that Cuba has been observing DST since 1963,
2812 2807 # while Shanks (and tzdata) has 1965 as the first date (except in the
2813 2808 # 1940's). Many other web pages in Cuba also claim that it has been
2814 2809 # observed since 1963, but with the exception of 1970 - an exception
2815 2810 # which is not present in tzdata/Shanks. So there is a chance we need to
2816 2811 # change some historic records as well.
2817 2812 #
2818 2813 # One example:
2819 2814 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm
2820 2815
2821 2816 # From Jesper Nørgaard Welen (2008-03-13):
2822 2817 # The Cuban time change has just been confirmed on the most authoritative
2823 2818 # web site, the Granma. Please check out
2824 2819 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
2825 2820 #
2826 2821 # Basically as expected after Steffen Thorsen's information, the change
2827 2822 # will take place midnight between Saturday and Sunday.
2828 2823
2829 2824 # From Arthur David Olson (2008-03-12):
2830 2825 # Assume Sun>=15 (third Sunday) going forward.
2831 2826
2832 2827 # From Alexander Krivenyshev (2009-03-04)
2833 2828 # According to the Radio Reloj - Cuba will start Daylight Saving Time on
2834 2829 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
2835 2830 # not on midnight March 14 / March 15 as previously thought.
2836 2831 #
2837 2832 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
2838 2833 # (in Spanish)
2839 2834
2840 2835 # From Arthur David Olson (2009-03-09)
2841 2836 # I listened over the Internet to
2842 2837 # http://media.enet.cu/readioreloj
2843 2838 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
2844 2839 # the time was announced as "diez cinco" - the same time as here, indicating
2845 2840 # that has indeed switched to DST. Assume second Sunday from 2009 forward.
2846 2841
2847 2842 # From Steffen Thorsen (2011-03-08):
2848 2843 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
2849 2844 # this year. Nothing about the end date known so far (if that has
2850 2845 # changed at all).
2851 2846 #
2852 2847 # Source:
2853 2848 # http://granma.co.cu/2011/03/08/nacional/artic01.html
2854 2849 #
2855 2850 # Our info:
2856 2851 # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
2857 2852 #
2858 2853 # From Steffen Thorsen (2011-10-30)
2859 2854 # Cuba will end DST two weeks later this year. Instead of going back
2860 2855 # tonight, it has been delayed to 2011-11-13 at 01:00.
2861 2856 #
2862 2857 # One source (Spanish)
2863 2858 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
2864 2859 #
2865 2860 # Our page:
2866 2861 # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html
2867 2862 #
2868 2863 # From Steffen Thorsen (2012-03-01)
2869 2864 # According to Radio Reloj, Cuba will start DST on Midnight between March
2870 2865 # 31 and April 1.
2871 2866 #
2872 2867 # Radio Reloj has the following info (Spanish):
2873 2868 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
2874 2869 #
2875 2870 # Our info on it:
2876 2871 # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
2877 2872
2878 2873 # From Steffen Thorsen (2012-11-03):
2879 2874 # Radio Reloj and many other sources report that Cuba is changing back
2880 2875 # to standard time on 2012-11-04:
2881 2876 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
2882 2877 # From Paul Eggert (2012-11-03):
2883 2878 # For now, assume the future rule is first Sunday in November.
2884 2879
2885 2880 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2886 2881 Rule Cuba 1928 only - Jun 10 0:00 1:00 D
2887 2882 Rule Cuba 1928 only - Oct 10 0:00 0 S
2888 2883 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
2889 2884 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
2890 2885 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
2891 2886 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
2892 2887 Rule Cuba 1965 only - Jun 1 0:00 1:00 D
2893 2888 Rule Cuba 1965 only - Sep 30 0:00 0 S
2894 2889 Rule Cuba 1966 only - May 29 0:00 1:00 D
2895 2890 Rule Cuba 1966 only - Oct 2 0:00 0 S
2896 2891 Rule Cuba 1967 only - Apr 8 0:00 1:00 D
2897 2892 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
2898 2893 Rule Cuba 1968 only - Apr 14 0:00 1:00 D
2899 2894 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
2900 2895 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
2901 2896 Rule Cuba 1972 1974 - Oct 8 0:00 0 S
2902 2897 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
2903 2898 Rule Cuba 1978 only - May 7 0:00 1:00 D
2904 2899 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S
2905 2900 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
2906 2901 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
2907 2902 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
2908 2903 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
2909 2904 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
2910 2905 Rule Cuba 1996 only - Oct 6 0:00s 0 S
2911 2906 Rule Cuba 1997 only - Oct 12 0:00s 0 S
2912 2907 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
2913 2908 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S
2914 2909 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D
2915 2910 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D
2916 2911 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S
2917 2912 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D
2918 2913 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D
2919 2914 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D
2920 2915 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D
2921 2916 Rule Cuba 2011 only - Nov 13 0:00s 0 S
2922 2917 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D
2923 2918 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S
2924 2919 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D
2925 2920
2926 2921 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2927 2922 Zone America/Havana -5:29:28 - LMT 1890
2928 2923 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
2929 2924 -5:00 Cuba C%sT
2930 2925
2931 2926 # Dominica
2932 2927 # See America/Port_of_Spain.
2933 2928
2934 2929 # Dominican Republic
2935 2930
2936 2931 # From Steffen Thorsen (2000-10-30):
2937 2932 # Enrique Morales reported to me that the Dominican Republic has changed the
2938 2933 # time zone to Eastern Standard Time as of Sunday 29 at 2 am....
2939 2934 # http://www.listin.com.do/antes/261000/republica/princi.html
2940 2935
2941 2936 # From Paul Eggert (2000-12-04):
2942 2937 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
2943 2938
2944 2939 # From Rives McDow (2000-12-01):
2945 2940 # Dominican Republic changed its mind and presidential decree on Tuesday,
2946 2941 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the
2947 2942 # Dominican Republic will be reverting to 8 hours from the International Date
2948 2943 # Line, and will not be using DST in the foreseeable future. The reason they
2949 2944 # decided to use DST was to be in synch with Puerto Rico, who was also going
2950 2945 # to implement DST. When Puerto Rico didn't implement DST, the president
2951 2946 # decided to revert.
2952 2947
2953 2948
2954 2949 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2955 2950 Rule DR 1966 only - Oct 30 0:00 1:00 D
2956 2951 Rule DR 1967 only - Feb 28 0:00 0 S
2957 2952 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD
2958 2953 Rule DR 1970 only - Feb 21 0:00 0 S
2959 2954 Rule DR 1971 only - Jan 20 0:00 0 S
2960 2955 Rule DR 1972 1974 - Jan 21 0:00 0 S
2961 2956 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2962 2957 Zone America/Santo_Domingo -4:39:36 - LMT 1890
2963 2958 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
2964 2959 -5:00 DR E%sT 1974 Oct 27
2965 2960 -4:00 - AST 2000 Oct 29 2:00
2966 2961 -5:00 US E%sT 2000 Dec 3 1:00
2967 2962 -4:00 - AST
2968 2963
2969 2964 # El Salvador
2970 2965
2971 2966 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2972 2967 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
2973 2968 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
2974 2969 # There are too many San Salvadors elsewhere, so use America/El_Salvador
2975 2970 # instead of America/San_Salvador.
2976 2971 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2977 2972 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
2978 2973 -6:00 Salv C%sT
2979 2974
2980 2975 # Grenada
2981 2976 # Guadeloupe
2982 2977 # St Barthélemy
2983 2978 # St Martin (French part)
2984 2979 # See America/Port_of_Spain.
2985 2980
2986 2981 # Guatemala
2987 2982 #
2988 2983 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
2989 2984 # Diario Co Latino, at
2990 2985 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
2991 2986 # says in an article dated 2006-04-19 that the Guatemalan government had
2992 2987 # decided on that date to advance official time by 60 minutes, to lessen the
2993 2988 # impact of the elevated cost of oil.... Daylight saving time will last from
2994 2989 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
2995 2990 # From Paul Eggert (2006-06-22):
2996 2991 # The Ministry of Energy and Mines, press release CP-15/2006
2997 2992 # (2006-04-19), says DST ends at 24:00. See
2998 2993 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf
2999 2994
3000 2995 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3001 2996 Rule Guat 1973 only - Nov 25 0:00 1:00 D
3002 2997 Rule Guat 1974 only - Feb 24 0:00 0 S
3003 2998 Rule Guat 1983 only - May 21 0:00 1:00 D
3004 2999 Rule Guat 1983 only - Sep 22 0:00 0 S
3005 3000 Rule Guat 1991 only - Mar 23 0:00 1:00 D
3006 3001 Rule Guat 1991 only - Sep 7 0:00 0 S
3007 3002 Rule Guat 2006 only - Apr 30 0:00 1:00 D
3008 3003 Rule Guat 2006 only - Oct 1 0:00 0 S
3009 3004 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3010 3005 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
3011 3006 -6:00 Guat C%sT
3012 3007
3013 3008 # Haiti
3014 3009 # From Gwillim Law (2005-04-15):
3015 3010 # Risto O. Nykänen wrote me that Haiti is now on DST.
3016 3011 # I searched for confirmation, and I found a press release
3017 3012 # on the Web page of the Haitian Consulate in Chicago (2005-03-31),
3018 3013 # <http://www.haitianconsulate.org/time.doc>. Translated from French, it says:
3019 3014 #
3020 3015 # "The Prime Minister's Communication Office notifies the public in general
3021 3016 # and the press in particular that, following a decision of the Interior
3022 3017 # Ministry and the Territorial Collectivities [I suppose that means the
3023 3018 # provinces], Haiti will move to Eastern Daylight Time in the night from next
3024 3019 # Saturday the 2nd to Sunday the 3rd.
3025 3020 #
3026 3021 # "Consequently, the Prime Minister's Communication Office wishes to inform
3027 3022 # the population that the country's clocks will be set forward one hour
3028 3023 # starting at midnight. This provision will hold until the last Saturday in
3029 3024 # October 2005.
3030 3025 #
3031 3026 # "Port-au-Prince, March 31, 2005"
3032 3027 #
3033 3028 # From Steffen Thorsen (2006-04-04):
3034 3029 # I have been informed by users that Haiti observes DST this year like
3035 3030 # last year, so the current "only" rule for 2005 might be changed to a
3036 3031 # "max" rule or to last until 2006. (Who knows if they will observe DST
3037 3032 # next year or if they will extend their DST like US/Canada next year).
3038 3033 #
3039 3034 # I have found this article about it (in French):
3040 3035 # http://www.haitipressnetwork.com/news.cfm?articleID=7612
3041 3036 #
3042 3037 # The reason seems to be an energy crisis.
3043 3038
3044 3039 # From Stephen Colebourne (2007-02-22):
3045 3040 # Some IATA info: Haiti won't be having DST in 2007.
3046 3041
3047 3042 # From Steffen Thorsen (2012-03-11):
3048 3043 # According to several news sources, Haiti will observe DST this year,
3049 3044 # apparently using the same start and end date as USA/Canada.
3050 3045 # So this means they have already changed their time.
3051 3046 #
3052 3047 # http://www.alterpresse.org/spip.php?article12510
3053 3048 # http://radiovision2000haiti.net/home/?p=13253
3054 3049 #
3055 3050 # From Arthur David Olson (2012-03-11):
3056 3051 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to
3057 3052 # 3:00 a.m. rather than the traditional Haitian jump at midnight.
|
↓ open down ↓ |
341 lines elided |
↑ open up ↑ |
3058 3053 # Assume a US-style fall back as well.
3059 3054
3060 3055 # From Steffen Thorsen (2013-03-10):
3061 3056 # It appears that Haiti is observing DST this year as well, same rules
3062 3057 # as US/Canada. They did it last year as well, and it looks like they
3063 3058 # are going to observe DST every year now...
3064 3059 #
3065 3060 # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
3066 3061 # http://www.canalplushaiti.net/?p=6714
3067 3062
3063 +# From Steffen Thorsen (2016-03-12):
3064 +# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti
3065 +# are not going on DST this year. Several other resources confirm this: ...
3066 +# http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html
3067 +# http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/
3068 +# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/
3069 +
3068 3070 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3069 3071 Rule Haiti 1983 only - May 8 0:00 1:00 D
3070 3072 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
3071 3073 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
3072 3074 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3073 3075 # Go with IATA.
3074 3076 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
3075 3077 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
3076 3078 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
3077 3079 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
3078 -Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D
3079 -Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S
3080 +Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D
3081 +Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S
3080 3082 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3081 3083 Zone America/Port-au-Prince -4:49:20 - LMT 1890
3082 3084 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
3083 3085 -5:00 Haiti E%sT
3084 3086
3085 3087 # Honduras
3086 3088 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3087 3089
3088 3090 # From Paul Eggert (2006-05-05):
3089 3091 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3090 3092 # saying Honduras will start using DST midnight Saturday, effective 4
3091 3093 # months until September. La Tribuna reported today
3092 3094 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
3093 3095 # of Honduras, refused to back down on this.
3094 3096
3095 3097 # From Jesper Nørgaard Welen (2006-08-08):
3096 3098 # It seems that Honduras has returned from DST to standard time this Monday at
3097 3099 # 00:00 hours (prolonging Sunday to 25 hours duration).
3098 3100 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
3099 3101
3100 3102 # From Paul Eggert (2006-08-08):
3101 3103 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3102 3104 # http://www.elheraldo.hn/nota.php?nid=54941&sec=12
3103 3105 # It mentions executive decree 18-2006.
3104 3106
3105 3107 # From Steffen Thorsen (2006-08-17):
3106 3108 # Honduras will observe DST from 2007 to 2009, exact dates are not
3107 3109 # published, I have located this authoritative source:
3108 3110 # http://www.presidencia.gob.hn/noticia.aspx?nId=47
3109 3111
3110 3112 # From Steffen Thorsen (2007-03-30):
3111 3113 # http://www.laprensahn.com/pais_nota.php?id04962=7386
3112 3114 # So it seems that Honduras will not enter DST this year....
3113 3115
3114 3116 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3115 3117 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
3116 3118 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
3117 3119 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
3118 3120 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
3119 3121 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3120 3122 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
3121 3123 -6:00 Hond C%sT
3122 3124 #
3123 3125 # Great Swan I ceded by US to Honduras in 1972
3124 3126
3125 3127 # Jamaica
3126 3128 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3127 3129 # unspecified official document, and says "This time is used throughout the
3128 3130 # island". Go with Milne. Round to the nearest second as required by zic.
3129 3131 #
3130 3132 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3131 3133 # Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
3132 3134 # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that
3133 3135 # Manley's supporters associated this act with Manley's nickname "Joshua"
3134 3136 # (recall that in the Bible the sun stood still at Joshua's request),
3135 3137 # and with the Rod of Correction which Manley said he had received from
3136 3138 # Haile Selassie, Emperor of Ethiopia. See:
3137 3139 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3138 3140 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3139 3141 #
3140 3142 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3141 3143 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston
3142 3144 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3143 3145 -5:00 - EST 1974
3144 3146 -5:00 US E%sT 1984
3145 3147 -5:00 - EST
3146 3148
3147 3149 # Martinique
3148 3150 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3149 3151 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
3150 3152 -4:04:20 - FFMT 1911 May # Fort-de-France MT
3151 3153 -4:00 - AST 1980 Apr 6
3152 3154 -4:00 1:00 ADT 1980 Sep 28
3153 3155 -4:00 - AST
3154 3156
3155 3157 # Montserrat
3156 3158 # See America/Port_of_Spain.
3157 3159
3158 3160 # Nicaragua
3159 3161 #
3160 3162 # This uses Shanks & Pottenger for times before 2005.
3161 3163 #
3162 3164 # From Steffen Thorsen (2005-04-12):
3163 3165 # I've got reports from 8 different people that Nicaragua just started
3164 3166 # DST on Sunday 2005-04-10, in order to save energy because of
3165 3167 # expensive petroleum. The exact end date for DST is not yet
3166 3168 # announced, only "September" but some sites also say "mid-September".
3167 3169 # Some background information is available on the President's official site:
3168 3170 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
3169 3171 # The Decree, no 23-2005 is available here:
3170 3172 # 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
3171 3173 #
3172 3174 # From Paul Eggert (2005-05-01):
3173 3175 # The decree doesn't say anything about daylight saving, but for now let's
3174 3176 # assume that it is daylight saving....
3175 3177 #
3176 3178 # From Gwillim Law (2005-04-21):
3177 3179 # The Associated Press story on the time change, which can be found at
3178 3180 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
3179 3181 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last
3180 3182 # time that a change of clocks was applied to save energy was in the year 2000
3181 3183 # during the Arnoldo Alemán administration."...
3182 3184 # The northamerica file says that Nicaragua has been on UTC-6 continuously
3183 3185 # since December 1998. I wasn't able to find any details of Nicaraguan time
3184 3186 # changes in 2000. Perhaps a note could be added to the northamerica file, to
3185 3187 # the effect that we have indirect evidence that DST was observed in 2000.
3186 3188 #
3187 3189 # From Jesper Nørgaard Welen (2005-11-02):
3188 3190 # Nicaragua left DST the 2005-10-02 at 00:00 (local time).
3189 3191 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
3190 3192 # (2005-09-26)
3191 3193 #
3192 3194 # From Jesper Nørgaard Welen (2006-05-05):
3193 3195 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
3194 3196 # (my informal translation)
3195 3197 # By order of the president of the republic, Enrique Bolaños, Nicaragua
3196 3198 # advanced by sixty minutes their official time, yesterday at 2 in the
3197 3199 # morning, and will stay that way until 30th of September.
3198 3200 #
3199 3201 # From Jesper Nørgaard Welen (2006-09-30):
3200 3202 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3201 3203 # My informal translation runs:
3202 3204 # The natural sun time is restored in all the national territory, in that the
3203 3205 # time is returned one hour at 01:00 am of October 1 of 2006.
3204 3206 #
3205 3207 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3206 3208 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
3207 3209 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
3208 3210 Rule Nic 2005 only - Apr 10 0:00 1:00 D
3209 3211 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S
3210 3212 Rule Nic 2006 only - Apr 30 2:00 1:00 D
3211 3213 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S
3212 3214 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3213 3215 Zone America/Managua -5:45:08 - LMT 1890
3214 3216 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
3215 3217 -6:00 - CST 1973 May
3216 3218 -5:00 - EST 1975 Feb 16
3217 3219 -6:00 Nic C%sT 1992 Jan 1 4:00
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3218 3220 -5:00 - EST 1992 Sep 24
3219 3221 -6:00 - CST 1993
3220 3222 -5:00 - EST 1997
3221 3223 -6:00 Nic C%sT
3222 3224
3223 3225 # Panama
3224 3226 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3225 3227 Zone America/Panama -5:18:08 - LMT 1890
3226 3228 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time
3227 3229 -5:00 - EST
3230 +Link America/Panama America/Cayman
3228 3231
3229 3232 # Puerto Rico
3230 3233 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3231 3234 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3232 3235 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
3233 3236 -4:00 - AST 1942 May 3
3234 3237 -4:00 US A%sT 1946
3235 3238 -4:00 - AST
3236 3239
3237 3240 # St Kitts-Nevis
3238 3241 # St Lucia
3239 3242 # See America/Port_of_Spain.
3240 3243
3241 3244 # St Pierre and Miquelon
3242 3245 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3243 3246 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3244 3247 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
3245 3248 -4:00 - AST 1980 May
3246 3249 -3:00 - PMST 1987 # Pierre & Miquelon Time
3247 3250 -3:00 Canada PM%sT
3248 3251
3249 3252 # St Vincent and the Grenadines
3250 3253 # See America/Port_of_Spain.
3251 3254
3252 3255 # Turks and Caicos
3253 3256 #
3254 3257 # From Chris Dunn in
3255 3258 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007
3256 3259 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3257 3260 # daylight saving dates for time changes have been adjusted to match
3258 3261 # the recent U.S. change of dates.
3259 3262 #
3260 3263 # From Brian Inglis (2007-04-28):
3261 3264 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3262 3265 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3263 3266 # rows before that there is an out of date entry for Oct:
3264 3267 # "Eastern Standard Times Begins 2007
3265 3268 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3266 3269 # indicating that the normal ET rules are followed.
3267 3270 #
3268 3271 # From Paul Eggert (2014-08-19):
3269 3272 # The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See:
3270 3273 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3271 3274 # Model this as a switch from EST/EDT to AST ...
3272 3275 # From Chris Walton (2014-11-04):
3273 3276 # ... the TCI government appears to have delayed the switch to
3274 3277 # "permanent daylight saving time" by one year....
3275 3278 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3276 3279 #
3277 3280 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3278 3281 Zone America/Grand_Turk -4:44:32 - LMT 1890
3279 3282 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3280 3283 -5:00 - EST 1979
3281 3284 -5:00 US E%sT 2015 Nov Sun>=1 2:00
3282 3285 -4:00 - AST
3283 3286
3284 3287 # British Virgin Is
3285 3288 # Virgin Is
3286 3289 # See America/Port_of_Spain.
3287 3290
3288 3291
3289 3292 # Local Variables:
3290 3293 # coding: utf-8
3291 3294 # End:
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