7 # go ahead and edit the file (and please send any changes to
8 # tz@iana.org for general use in the future). For more, please see
9 # the file CONTRIBUTING in the tz distribution.
10
11 # From Paul Eggert (1999-03-22):
12 # A reliable and entertaining source about time zones is
13 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
14
15 ###############################################################################
16
17 # United States
18
19 # From Paul Eggert (1999-03-31):
20 # Howse writes (pp 121-125) that time zones were invented by
21 # Professor Charles Ferdinand Dowd (1825-1904),
22 # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
23 # His pamphlet "A System of National Time for Railroads" (1870)
24 # was the result of his proposals at the Convention of Railroad Trunk Lines
25 # in New York City (1869-10). His 1870 proposal was based on Washington, DC,
26 # but in 1872-05 he moved the proposed origin to Greenwich.
27 # His proposal was adopted by the railroads on 1883-11-18 at 12:00,
28 # and the most of the country soon followed suit.
29
30 # From Paul Eggert (2005-04-16):
31 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
32 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
33
34 # From Paul Eggert (2006-03-22):
35 # A good source for time zone historical data in the US is
36 # Thomas G. Shanks, The American Atlas (5th edition),
37 # San Diego: ACS Publications, Inc. (1991).
38 # Make sure you have the errata sheet; the book is somewhat useless without it.
39 # It is the source for most of the pre-1991 US entries below.
40
41 # From Paul Eggert (2001-03-06):
42 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin
43 # in his whimsical essay "An Economical Project for Diminishing the Cost
44 # of Light" published in the Journal de Paris (1784-04-26).
45 # Not everyone is happy with the results:
46 #
47 # I don't really care how time is reckoned so long as there is some
48 # agreement about it, but I object to being told that I am saving
49 # daylight when my reason tells me that I am doing nothing of the kind.
396 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
397 Rule Denver 1920 only - Oct lastSun 2:00 0 S
398 Rule Denver 1921 only - May 22 2:00 0 S
399 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
400 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
401 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
402 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04
403 -7:00 US M%sT 1920
404 -7:00 Denver M%sT 1942
405 -7:00 US M%sT 1946
406 -7:00 Denver M%sT 1967
407 -7:00 US M%sT
408
409 # US Pacific time, represented by Los Angeles
410 #
411 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
412 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
413 # north of the Salmon River, and the towns of Burgdorf and Warren),
414 # Nevada (except West Wendover), Oregon (except the northern 3/4 of
415 # Malheur county), and Washington
416 #
417 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
418 Rule CA 1948 only - Mar 14 2:00 1:00 D
419 Rule CA 1949 only - Jan 1 2:00 0 S
420 Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D
421 Rule CA 1950 1961 - Sep lastSun 2:00 0 S
422 Rule CA 1962 1966 - Oct lastSun 2:00 0 S
423 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
424 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
425 -8:00 US P%sT 1946
426 -8:00 CA P%sT 1967
427 -8:00 US P%sT
428
429 # Alaska
430 # AK%sT is the modern abbreviation for -9:00 per USNO.
431 #
432 # From Paul Eggert (2001-05-30):
433 # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
434 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
435 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
436 # also a Friday. Include only the time zone part of this transition,
437 # ignoring the switch from Julian to Gregorian, since we can't represent
438 # the Julian calendar.
439 #
440 # As far as we know, none of the exact locations mentioned below were
2174 # If I had realized the Stephanie did not live in Resolute Bay I would
2175 # never have contacted her. I now believe that all the information I
2176 # obtained in November 2008 should be ignored...
2177 # I apologize for reporting incorrect information in 2008.
2178
2179 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2180 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
2181 Rule NT_YK 1918 only - Oct 27 2:00 0 S
2182 Rule NT_YK 1919 only - May 25 2:00 1:00 D
2183 Rule NT_YK 1919 only - Nov 1 0:00 0 S
2184 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
2185 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
2186 Rule NT_YK 1945 only - Sep 30 2:00 0 S
2187 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
2188 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
2189 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
2190 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S
2191 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
2192 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2193 # aka Panniqtuuq
2194 Zone America/Pangnirtung 0 - zzz 1921 # trading post est.
2195 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
2196 -5:00 Canada E%sT 1999 Oct 31 2:00
2197 -6:00 Canada C%sT 2000 Oct 29 2:00
2198 -5:00 Canada E%sT
2199 # formerly Frobisher Bay
2200 Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est.
2201 -5:00 NT_YK E%sT 1999 Oct 31 2:00
2202 -6:00 Canada C%sT 2000 Oct 29 2:00
2203 -5:00 Canada E%sT
2204 # aka Qausuittuq
2205 Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded
2206 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2207 -5:00 - EST 2001 Apr 1 3:00
2208 -6:00 Canada C%sT 2006 Oct 29 2:00
2209 -5:00 - EST 2007 Mar 11 3:00
2210 -6:00 Canada C%sT
2211 # aka Kangiqiniq
2212 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded
2213 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2214 -5:00 - EST 2001 Apr 1 3:00
2215 -6:00 Canada C%sT
2216 # aka Iqaluktuuttiaq
2217 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.?
2218 -7:00 NT_YK M%sT 1999 Oct 31 2:00
2219 -6:00 Canada C%sT 2000 Oct 29 2:00
2220 -5:00 - EST 2000 Nov 5 0:00
2221 -6:00 - CST 2001 Apr 1 3:00
2222 -7:00 Canada M%sT
2223 Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded?
2224 -7:00 NT_YK M%sT 1980
2225 -7:00 Canada M%sT
2226 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded
2227 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
2228 -7:00 NT_YK M%sT 1980
2229 -7:00 Canada M%sT
2230 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
2231 -9:00 NT_YK Y%sT 1967 May 28 0:00
2232 -8:00 NT_YK P%sT 1980
2233 -8:00 Canada P%sT
2234 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
2235 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
2236 -8:00 NT_YK P%sT 1980
2237 -8:00 Canada P%sT
2238
2239
2240 ###############################################################################
2241
2242 # Mexico
2243
2244 # From Paul Eggert (2014-12-07):
2245 # The Investigation and Analysis Service of the
2246 # Mexican Library of Congress (MLoC) has published a
2459 Rule Mexico 1950 only - Jul 30 0:00 0 S
2460 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2461 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2462 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2463 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2464 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
2465 Rule Mexico 2002 max - Oct lastSun 2:00 0 S
2466 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2467 # Quintana Roo; represented by Cancún
2468 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
2469 -6:00 - CST 1981 Dec 23
2470 -5:00 Mexico E%sT 1998 Aug 2 2:00
2471 -6:00 Mexico C%sT 2015 Feb 1 2:00
2472 -5:00 - EST
2473 # Campeche, Yucatán; represented by Mérida
2474 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
2475 -6:00 - CST 1981 Dec 23
2476 -5:00 - EST 1982 Dec 2
2477 -6:00 Mexico C%sT
2478 # Coahuila, Nuevo León, Tamaulipas (near US border)
2479 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00
2480 -6:00 - CST 1988
2481 -6:00 US C%sT 1989
2482 -6:00 Mexico C%sT 2010
2483 -6:00 US C%sT
2484 # Durango; Coahuila, Nuevo León, Tamaulipas (away from US border)
2485 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
2486 -6:00 - CST 1988
2487 -6:00 US C%sT 1989
2488 -6:00 Mexico C%sT
2489 # Central Mexico
2490 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
2491 -7:00 - MST 1927 Jun 10 23:00
2492 -6:00 - CST 1930 Nov 15
2493 -7:00 - MST 1931 May 1 23:00
2494 -6:00 - CST 1931 Oct
2495 -7:00 - MST 1932 Apr 1
2496 -6:00 Mexico C%sT 2001 Sep 30 2:00
2497 -6:00 - CST 2002 Feb 20
2498 -6:00 Mexico C%sT
2499 # Chihuahua (near US border)
2500 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20
2501 -7:00 - MST 1927 Jun 10 23:00
2502 -6:00 - CST 1930 Nov 15
2503 -7:00 - MST 1931 May 1 23:00
2504 -6:00 - CST 1931 Oct
2505 -7:00 - MST 1932 Apr 1
2506 -6:00 - CST 1996
2507 -6:00 Mexico C%sT 1998
2508 -6:00 - CST 1998 Apr Sun>=1 3:00
2509 -7:00 Mexico M%sT 2010
2510 -7:00 US M%sT
2511 # Chihuahua (away from US border)
2512 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
2513 -7:00 - MST 1927 Jun 10 23:00
2514 -6:00 - CST 1930 Nov 15
2515 -7:00 - MST 1931 May 1 23:00
2516 -6:00 - CST 1931 Oct
2517 -7:00 - MST 1932 Apr 1
2518 -6:00 - CST 1996
2519 -6:00 Mexico C%sT 1998
3252 # St Vincent and the Grenadines
3253 # See America/Port_of_Spain.
3254
3255 # Turks and Caicos
3256 #
3257 # From Chris Dunn in
3258 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007
3259 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3260 # daylight saving dates for time changes have been adjusted to match
3261 # the recent U.S. change of dates.
3262 #
3263 # From Brian Inglis (2007-04-28):
3264 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3265 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3266 # rows before that there is an out of date entry for Oct:
3267 # "Eastern Standard Times Begins 2007
3268 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3269 # indicating that the normal ET rules are followed.
3270 #
3271 # From Paul Eggert (2014-08-19):
3272 # The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See:
3273 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3274 # Model this as a switch from EST/EDT to AST ...
3275 # From Chris Walton (2014-11-04):
3276 # ... the TCI government appears to have delayed the switch to
3277 # "permanent daylight saving time" by one year....
3278 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3279 #
3280 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3281 Zone America/Grand_Turk -4:44:32 - LMT 1890
3282 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3283 -5:00 - EST 1979
3284 -5:00 US E%sT 2015 Nov Sun>=1 2:00
3285 -4:00 - AST
3286
3287 # British Virgin Is
3288 # Virgin Is
3289 # See America/Port_of_Spain.
3290
3291
3292 # Local Variables:
|
7 # go ahead and edit the file (and please send any changes to
8 # tz@iana.org for general use in the future). For more, please see
9 # the file CONTRIBUTING in the tz distribution.
10
11 # From Paul Eggert (1999-03-22):
12 # A reliable and entertaining source about time zones is
13 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
14
15 ###############################################################################
16
17 # United States
18
19 # From Paul Eggert (1999-03-31):
20 # Howse writes (pp 121-125) that time zones were invented by
21 # Professor Charles Ferdinand Dowd (1825-1904),
22 # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
23 # His pamphlet "A System of National Time for Railroads" (1870)
24 # was the result of his proposals at the Convention of Railroad Trunk Lines
25 # in New York City (1869-10). His 1870 proposal was based on Washington, DC,
26 # but in 1872-05 he moved the proposed origin to Greenwich.
27
28 # From Paul Eggert (2016-09-21):
29 # Dowd's proposal left many details unresolved, such as where to draw
30 # lines between time zones. The key individual who made time zones
31 # work in the US was William Frederick Allen - railway engineer,
32 # managing editor of the Travelers' Guide, and secretary of the
33 # General Time Convention, a railway standardization group. Allen
34 # spent months in dialogs with scientific and railway leaders,
35 # developed a workable plan to institute time zones, and presented it
36 # to the General Time Convention on 1883-04-11, saying that his plan
37 # meant "local time would be practically abolished" - a plus for
38 # railway scheduling. By the next convention on 1883-10-11 nearly all
39 # railroads had agreed and it took effect on 1883-11-18 at 12:00.
40 # That Sunday was called the "day of two noons", as the eastern parts
41 # of the new zones observed noon twice. Allen witnessed the
42 # transition in New York City, writing:
43 #
44 # I heard the bells of St. Paul's strike on the old time. Four
45 # minutes later, obedient to the electrical signal from the Naval
46 # Observatory ... the time-ball made its rapid descent, the chimes
47 # of old Trinity rang twelve measured strokes, and local time was
48 # abandoned, probably forever.
49 #
50 # Most of the US soon followed suit. See:
51 # Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56.
52 # http://dx.doi.org/10.2307/3105430
53
54 # From Paul Eggert (2005-04-16):
55 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
56 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
57
58 # From Paul Eggert (2006-03-22):
59 # A good source for time zone historical data in the US is
60 # Thomas G. Shanks, The American Atlas (5th edition),
61 # San Diego: ACS Publications, Inc. (1991).
62 # Make sure you have the errata sheet; the book is somewhat useless without it.
63 # It is the source for most of the pre-1991 US entries below.
64
65 # From Paul Eggert (2001-03-06):
66 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin
67 # in his whimsical essay "An Economical Project for Diminishing the Cost
68 # of Light" published in the Journal de Paris (1784-04-26).
69 # Not everyone is happy with the results:
70 #
71 # I don't really care how time is reckoned so long as there is some
72 # agreement about it, but I object to being told that I am saving
73 # daylight when my reason tells me that I am doing nothing of the kind.
420 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
421 Rule Denver 1920 only - Oct lastSun 2:00 0 S
422 Rule Denver 1921 only - May 22 2:00 0 S
423 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
424 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
425 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
426 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04
427 -7:00 US M%sT 1920
428 -7:00 Denver M%sT 1942
429 -7:00 US M%sT 1946
430 -7:00 Denver M%sT 1967
431 -7:00 US M%sT
432
433 # US Pacific time, represented by Los Angeles
434 #
435 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
436 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
437 # north of the Salmon River, and the towns of Burgdorf and Warren),
438 # Nevada (except West Wendover), Oregon (except the northern 3/4 of
439 # Malheur county), and Washington
440
441 # From Paul Eggert (2016-08-20):
442 # In early February 1948, in response to California's electricity shortage,
443 # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours,
444 # causing electric clocks to lose six minutes per day. (This did not change
445 # legal time, and is not part of the data here.) See:
446 # Ross SA. An energy crisis from the past: Northern California in 1948.
447 # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley,
448 # 1973-11. http://escholarship.org/uc/item/8x22k30c
449 #
450 # In another measure to save electricity, DST was instituted from 1948-03-14
451 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move
452 # the fallback transition earlier. See pages 3-4 of:
453 # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf
454 #
455 # In response:
456 #
457 # Governor Warren received a torrent of objecting mail, and it is not too much
458 # to speculate that the objections to Daylight Saving Time were one important
459 # factor in the defeat of the Dewey-Warren Presidential ticket in California.
460 # -- Ross, p 25
461 #
462 # On December 8 the governor exercised the option, setting the date to January 1
463 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01).
464 #
465 # Despite the controversy, in 1949 California voters approved Proposition 12,
466 # which established DST from April's last Sunday at 01:00 until September's
467 # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
468 # the fall-back date to October's last Sunday. See:
469 # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
470 # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
471 #
472 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
473 Rule CA 1948 only - Mar 14 2:01 1:00 D
474 Rule CA 1949 only - Jan 1 2:00 0 S
475 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D
476 Rule CA 1950 1961 - Sep lastSun 2:00 0 S
477 Rule CA 1962 1966 - Oct lastSun 2:00 0 S
478 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
479 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
480 -8:00 US P%sT 1946
481 -8:00 CA P%sT 1967
482 -8:00 US P%sT
483
484 # Alaska
485 # AK%sT is the modern abbreviation for -9:00 per USNO.
486 #
487 # From Paul Eggert (2001-05-30):
488 # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
489 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
490 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
491 # also a Friday. Include only the time zone part of this transition,
492 # ignoring the switch from Julian to Gregorian, since we can't represent
493 # the Julian calendar.
494 #
495 # As far as we know, none of the exact locations mentioned below were
2229 # If I had realized the Stephanie did not live in Resolute Bay I would
2230 # never have contacted her. I now believe that all the information I
2231 # obtained in November 2008 should be ignored...
2232 # I apologize for reporting incorrect information in 2008.
2233
2234 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2235 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
2236 Rule NT_YK 1918 only - Oct 27 2:00 0 S
2237 Rule NT_YK 1919 only - May 25 2:00 1:00 D
2238 Rule NT_YK 1919 only - Nov 1 0:00 0 S
2239 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
2240 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
2241 Rule NT_YK 1945 only - Sep 30 2:00 0 S
2242 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
2243 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
2244 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
2245 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S
2246 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
2247 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2248 # aka Panniqtuuq
2249 Zone America/Pangnirtung 0 - -00 1921 # trading post est.
2250 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
2251 -5:00 Canada E%sT 1999 Oct 31 2:00
2252 -6:00 Canada C%sT 2000 Oct 29 2:00
2253 -5:00 Canada E%sT
2254 # formerly Frobisher Bay
2255 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est.
2256 -5:00 NT_YK E%sT 1999 Oct 31 2:00
2257 -6:00 Canada C%sT 2000 Oct 29 2:00
2258 -5:00 Canada E%sT
2259 # aka Qausuittuq
2260 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded
2261 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2262 -5:00 - EST 2001 Apr 1 3:00
2263 -6:00 Canada C%sT 2006 Oct 29 2:00
2264 -5:00 - EST 2007 Mar 11 3:00
2265 -6:00 Canada C%sT
2266 # aka Kangiqiniq
2267 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded
2268 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2269 -5:00 - EST 2001 Apr 1 3:00
2270 -6:00 Canada C%sT
2271 # aka Iqaluktuuttiaq
2272 Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.?
2273 -7:00 NT_YK M%sT 1999 Oct 31 2:00
2274 -6:00 Canada C%sT 2000 Oct 29 2:00
2275 -5:00 - EST 2000 Nov 5 0:00
2276 -6:00 - CST 2001 Apr 1 3:00
2277 -7:00 Canada M%sT
2278 Zone America/Yellowknife 0 - -00 1935 # Yellowknife founded?
2279 -7:00 NT_YK M%sT 1980
2280 -7:00 Canada M%sT
2281 Zone America/Inuvik 0 - -00 1953 # Inuvik founded
2282 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
2283 -7:00 NT_YK M%sT 1980
2284 -7:00 Canada M%sT
2285 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
2286 -9:00 NT_YK Y%sT 1967 May 28 0:00
2287 -8:00 NT_YK P%sT 1980
2288 -8:00 Canada P%sT
2289 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
2290 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
2291 -8:00 NT_YK P%sT 1980
2292 -8:00 Canada P%sT
2293
2294
2295 ###############################################################################
2296
2297 # Mexico
2298
2299 # From Paul Eggert (2014-12-07):
2300 # The Investigation and Analysis Service of the
2301 # Mexican Library of Congress (MLoC) has published a
2514 Rule Mexico 1950 only - Jul 30 0:00 0 S
2515 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2516 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2517 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2518 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2519 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
2520 Rule Mexico 2002 max - Oct lastSun 2:00 0 S
2521 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2522 # Quintana Roo; represented by Cancún
2523 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
2524 -6:00 - CST 1981 Dec 23
2525 -5:00 Mexico E%sT 1998 Aug 2 2:00
2526 -6:00 Mexico C%sT 2015 Feb 1 2:00
2527 -5:00 - EST
2528 # Campeche, Yucatán; represented by Mérida
2529 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
2530 -6:00 - CST 1981 Dec 23
2531 -5:00 - EST 1982 Dec 2
2532 -6:00 Mexico C%sT
2533 # Coahuila, Nuevo León, Tamaulipas (near US border)
2534 # This includes the following municipalities:
2535 # in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava,
2536 # Guerrero, Hidalgo.
2537 # in Nuevo León: Anáhuac, Los Aldama.
2538 # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo,
2539 # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros.
2540 # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal,
2541 # 2016-03-12
2542 # http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza
2543 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00
2544 -6:00 - CST 1988
2545 -6:00 US C%sT 1989
2546 -6:00 Mexico C%sT 2010
2547 -6:00 US C%sT
2548 # Durango; Coahuila, Nuevo León, Tamaulipas (away from US border)
2549 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
2550 -6:00 - CST 1988
2551 -6:00 US C%sT 1989
2552 -6:00 Mexico C%sT
2553 # Central Mexico
2554 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
2555 -7:00 - MST 1927 Jun 10 23:00
2556 -6:00 - CST 1930 Nov 15
2557 -7:00 - MST 1931 May 1 23:00
2558 -6:00 - CST 1931 Oct
2559 -7:00 - MST 1932 Apr 1
2560 -6:00 Mexico C%sT 2001 Sep 30 2:00
2561 -6:00 - CST 2002 Feb 20
2562 -6:00 Mexico C%sT
2563 # Chihuahua (near US border)
2564 # This includes the municipalities of Janos, Ascensión, Juárez, Guadalupe,
2565 # Práxedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides.
2566 # (See the 2016-03-12 El Universal source mentioned above.)
2567 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20
2568 -7:00 - MST 1927 Jun 10 23:00
2569 -6:00 - CST 1930 Nov 15
2570 -7:00 - MST 1931 May 1 23:00
2571 -6:00 - CST 1931 Oct
2572 -7:00 - MST 1932 Apr 1
2573 -6:00 - CST 1996
2574 -6:00 Mexico C%sT 1998
2575 -6:00 - CST 1998 Apr Sun>=1 3:00
2576 -7:00 Mexico M%sT 2010
2577 -7:00 US M%sT
2578 # Chihuahua (away from US border)
2579 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
2580 -7:00 - MST 1927 Jun 10 23:00
2581 -6:00 - CST 1930 Nov 15
2582 -7:00 - MST 1931 May 1 23:00
2583 -6:00 - CST 1931 Oct
2584 -7:00 - MST 1932 Apr 1
2585 -6:00 - CST 1996
2586 -6:00 Mexico C%sT 1998
3319 # St Vincent and the Grenadines
3320 # See America/Port_of_Spain.
3321
3322 # Turks and Caicos
3323 #
3324 # From Chris Dunn in
3325 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007
3326 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3327 # daylight saving dates for time changes have been adjusted to match
3328 # the recent U.S. change of dates.
3329 #
3330 # From Brian Inglis (2007-04-28):
3331 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3332 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3333 # rows before that there is an out of date entry for Oct:
3334 # "Eastern Standard Times Begins 2007
3335 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3336 # indicating that the normal ET rules are followed.
3337 #
3338 # From Paul Eggert (2014-08-19):
3339 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See:
3340 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3341 # Model this as a switch from EST/EDT to AST ...
3342 # From Chris Walton (2014-11-04):
3343 # ... the TCI government appears to have delayed the switch to
3344 # "permanent daylight saving time" by one year....
3345 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3346 #
3347 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3348 Zone America/Grand_Turk -4:44:32 - LMT 1890
3349 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3350 -5:00 - EST 1979
3351 -5:00 US E%sT 2015 Nov Sun>=1 2:00
3352 -4:00 - AST
3353
3354 # British Virgin Is
3355 # Virgin Is
3356 # See America/Port_of_Spain.
3357
3358
3359 # Local Variables:
|