Lines Matching +full:acquisition +full:- +full:time +full:- +full:ns
4 # 2009-05-17 by Arthur David Olson.
13 # From Paul Eggert (1999-03-22):
14 # A reliable and entertaining source about time zones is
15 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
21 # From Paul Eggert (1999-03-31):
22 # Howse writes (pp 121-125) that time zones were invented by
23 # Professor Charles Ferdinand Dowd (1825-1904),
25 # His pamphlet "A System of National Time for Railroads" (1870)
27 # in New York City (1869-10). His 1870 proposal was based on Washington, DC,
28 # but in 1872-05 he moved the proposed origin to Greenwich.
30 # From Paul Eggert (2024-11-18):
32 # lines between time zones. Sandford Fleming of the Canadian Pacific Railway
34 # Meteorology Society published a report in 1879 recommending four US time
35 # zones based on GMT. However, the key individual who made time zones
36 # work in the US was William Frederick Allen - railway engineer,
38 # General Time Convention, a railway standardization group. Allen
40 # developed a workable plan to institute time zones, and presented it
41 # to the General Time Convention on 1883-04-11, saying that his plan
42 # meant "local time would be practically abolished" - a plus for
43 # railway scheduling. By the next convention on 1883-10-11 nearly all
44 # railroads had agreed and it took effect on 1883-11-18. That Sunday
48 # I heard the bells of St. Paul's strike on the old time. Four
50 # Observatory ... the time-ball made its rapid descent, the chimes
51 # of old Trinity rang twelve measured strokes, and local time was
55 # Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56.
58 # From Paul Eggert (2005-04-16):
59 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
62 # From Paul Eggert (2006-03-22):
63 # A good source for time zone historical data in the US is
67 # It is the source for most of the pre-1991 US entries below.
69 # From Paul Eggert (2001-03-06):
70 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin
72 # of Light" published in the Journal de Paris (1784-04-26).
75 # I don't really care how time is reckoned so long as there is some
81 # reduce my time for enjoying it. At the back of the Daylight Saving
82 # scheme I detect the bony, blue-fingered hand of Puritanism, eager
86 # -- Robertson Davies, The diary of Samuel Marchbanks,
94 # Shanks says that DST was called "War Time" in the US in 1918 and 1919.
95 # However, DST was imposed by the Standard Time Act of 1918, which
96 # was the first nationwide legal time standard, and apparently
97 # time was just called "Standard Time" or "Daylight Saving Time".
99 # From Paul Eggert (2019-06-04):
101 # * Public Law 65-106 (1918-03-19) implemented standard and daylight saving
102 # time for the first time across the US, springing forward on March's last
104 # https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf
105 # * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday.
106 # https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf
107 # * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09.
108 # https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf
109 # * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30.
110 # https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf
111 # * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST,
113 # https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf
114 # * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06.
115 # https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf
116 # * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to
118 # https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf
119 # * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first
121 # https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf
122 # * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward
123 # to March's second Sunday and the fall-back to November's first Sunday.
124 # https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf
125 # All transitions are at 02:00 local time.
128 # Before the Uniform Time Act of 1966 took effect in 1967, observance of
129 # Daylight Saving Time in the US was by local option, except during wartime.
131 # From Arthur David Olson (2000-09-25):
133 # In the introduction, Oboler spoke of "Eastern Peace Time."
136 # "When the time is announced over the radio now, it is 'Eastern Peace
137 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
140 # From Paul Eggert (2017-09-23):
141 # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter.
145 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
153 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From
156 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
168 # He had scored a 20-second scoop on other broadcasters.
170 # From Arthur David Olson (2005-08-22):
176 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
177 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
178 Rule US 1918 1919 - Oct lastSun 2:00 0 S
179 Rule US 1942 only - Feb 9 2:00 1:00 W # War
180 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
181 Rule US 1945 only - Sep 30 2:00 0 S
182 Rule US 1967 2006 - Oct lastSun 2:00 0 S
183 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
184 Rule US 1974 only - Jan 6 2:00 1:00 D
185 Rule US 1975 only - Feb lastSun 2:00 1:00 D
186 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
187 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
188 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
189 Rule US 2007 max - Nov Sun>=1 2:00 0 S
191 # From U. S. Naval Observatory (1989-01-19):
193 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
195 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
197 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
199 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
201 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
203 # USA " 9 H BEHIND UTC APR 3 - OCT 30
207 # From Arthur David Olson (1989-01-21):
213 # From Arthur David Olson (1988-02-13):
214 # Legal standard time zone names, from United States Code (1982 Edition and
216 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
219 # United States standard eastern time
220 # United States standard mountain time
221 # United States standard central time
222 # United States standard Pacific time
224 # United States standard Alaska time
226 # Next, names from 1967-04-01 until 1983-11-30 (the date for
227 # public law 98-181):
228 # Atlantic standard time
229 # eastern standard time
230 # central standard time
231 # mountain standard time
232 # Pacific standard time
233 # Yukon standard time
234 # Alaska-Hawaii standard time
235 # Bering standard time
236 # And after 1983-11-30:
237 # Atlantic standard time
238 # eastern standard time
239 # central standard time
240 # mountain standard time
241 # Pacific standard time
242 # Alaska standard time
243 # Hawaii-Aleutian standard time
244 # Samoa standard time
247 # From Paul Eggert (2016-12-19):
252 # Eastern Time" and similarly for "Central", "Mountain", "Pacific",
253 # and "Alaska", in practice "Standard" was placed just before "Time",
254 # as codified in 1966. In practice, Alaska time was abbreviated "AST"
257 # -08 Standard Pacific Time (PST) Pacific standard time (PST)
258 # -09 (unofficial) Yukon (YST) Yukon standard time (YST)
259 # -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST)
260 # -11 (unofficial) Nome (NST) Bering standard time (BST)
262 # From Paul Eggert (2023-01-23), from a 2001-01-08 heads-up from Rives McDow:
263 # Public law 106-564 (2000-12-23) introduced "Chamorro standard time"
264 # for time in Guam and the Northern Marianas. See the file "australasia".
267 # From Paul Eggert (2015-04-17):
268 # HST and HDT are standardized abbreviations for Hawaii-Aleutian
271 # https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
273 # From Arthur David Olson, 2005-08-09
274 # The following was signed into law on 2005-08-08.
277 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
278 # U.S.C. 260a(a)) is amended--
283 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the
285 # (c) Report to Congress.--Not later than 9 months after the effective
289 # (d) Right to Revert.--Congress retains the right to revert the
290 # Daylight Saving Time back to the 2005 time schedules once the
293 # US eastern time, represented by New York
302 # From Dave Cantor (2004-11-02):
305 # One of the staff members said that the station was on Eastern Standard Time
309 # From Paul Eggert (2005-08-26):
314 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
316 # time zone, but we do go by the Eastern time zone because so many people work
319 # From Paul Eggert (2017-02-22):
324 # time even after the mills closed. See: Kazek K. Did you know which
325 # Alabama towns are in a different time zone? al.com 2017-02-06.
328 # From Paul Eggert (2014-09-06):
329 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
330 # says that New York City Hall time was 3 minutes 58.4 seconds fast of
331 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch.
333 # Rule NAME FROM TO - IN ON AT SAVE LETTER
334 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
335 Rule NYC 1920 only - Oct lastSun 2:00 0 S
336 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
337 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
338 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
340 #STDOFF -4:56:01.6
341 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 17:00u
342 -5:00 US E%sT 1920
343 -5:00 NYC E%sT 1942
344 -5:00 US E%sT 1946
345 -5:00 NYC E%sT 1967
346 -5:00 US E%sT
348 # US central time, represented by Chicago
359 # From Paul Eggert (2018-01-07):
361 # time. Though delayed by the Great Fire, by 1880 a wire ran from the
364 # their time signals from the Allegheny Observatory, the Madison Observatory,
366 # other or with the city's official time. The confusion took some years to
368 # Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04.
369 # http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/
371 # From Larry M. Smith (2006-04-26) re Wisconsin:
373 # is currently enforced at the 01:00 time of change. Because the local
374 # "bar time" in the state corresponds to 02:00, a number of citations
378 # From Douglas R. Bomberg (2007-03-12):
379 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
383 # From an email administrator of the City of Fort Pierre, SD (2015-12-21):
384 # Fort Pierre is technically located in the Mountain time zone as is
386 # uses the Central time zone due to doing most of their business in
390 # From Paul Eggert (2015-12-25):
393 # From Paul Eggert (2015-04-06):
395 # and the other for liberals; the two sides didn't agree about the time of day.
396 # I haven't found a photo of this clock, nor have I tracked down the TIME
404 # the question of whether to approve daylight saving time for the entire state,
405 # TIME magazine reported:
408 # but the time of day - and last week they couldn't agree on that.'
410 # "It was all too true. The clock on the front of the building had two faces -
412 # was high noon Banner time, it was 11 a.m. Tennessean time."
415 # The Tennessean 2007-05-11, republished 2015-04-06.
416 # https://www.tennessean.com/story/insider/extras/2015/04/06/archives-seigenthaler-for-100-years-the-tennessean-had-it-covered/25348545/
418 # Rule NAME FROM TO - IN ON AT SAVE LETTER
419 Rule Chicago 1920 only - Jun 13 2:00 1:00 D
420 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
421 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
422 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
423 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
424 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
426 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 18:00u
427 -6:00 US C%sT 1920
428 -6:00 Chicago C%sT 1936 Mar 1 2:00
429 -5:00 - EST 1936 Nov 15 2:00
430 -6:00 Chicago C%sT 1942
431 -6:00 US C%sT 1946
432 -6:00 Chicago C%sT 1967
433 -6:00 US C%sT
434 # Oliver County, ND switched from mountain to central time on 1992-10-25.
435 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 19:00u
436 -7:00 US M%sT 1992 Oct 25 2:00
437 -6:00 US C%sT
438 # Morton County, ND, switched from mountain to central time on
439 # 2003-10-26, except for the area around Mandan which was already central time.
443 # but in practice these other counties were already observing central time.
444 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
445 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 19:00u
446 -7:00 US M%sT 2003 Oct 26 2:00
447 -6:00 US C%sT
449 # From Josh Findley (2011-01-21):
451 # mountain time zone to the central time zone at the last transition from
452 # daylight-saving to standard time (on Nov. 7, 2010):
453 # https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
454 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
456 # From Andy Lipscomb (2011-01-24):
458 # it's commonly referred to as Beulah-Hazen, with Hazen being the next
462 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 19:00u
463 -7:00 US M%sT 2010 Nov 7 2:00
464 -6:00 US C%sT
466 # US mountain time, represented by Denver
474 # From Paul Eggert (2018-10-25):
475 # On 1921-03-04 federal law placed all of Texas into the central time zone.
477 # mountain time, on the grounds that that's what they had always done
480 # 1970-04-10 to match what El Paso was actually doing. Although
483 # Long T. El Pasoans were time rebels, fought to stay in Mountain zone.
484 # El Paso Times. 2018-10-24 06:40 -06.
485 # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/
487 # Rule NAME FROM TO - IN ON AT SAVE LETTER
488 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
489 Rule Denver 1920 only - Oct lastSun 2:00 0 S
490 Rule Denver 1921 only - May 22 2:00 0 S
491 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
492 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
494 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 19:00u
495 -7:00 US M%sT 1920
496 -7:00 Denver M%sT 1942
497 -7:00 US M%sT 1946
498 -7:00 Denver M%sT 1967
499 -7:00 US M%sT
501 # US Pacific time, represented by Los Angeles
509 # From Paul Eggert (2016-08-20):
513 # legal time, and is not part of the data here.) See:
516 # 1973-11. https://escholarship.org/uc/item/8x22k30c
518 # In another measure to save electricity, DST was instituted from 1948-03-14
519 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move
520 # the fallback transition earlier. See pages 3-4 of:
526 # to speculate that the objections to Daylight Saving Time were one important
527 # factor in the defeat of the Dewey-Warren Presidential ticket in California.
528 # -- Ross, p 25
531 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01).
536 # the fall-back date to October's last Sunday. See:
540 # Rule NAME FROM TO - IN ON AT SAVE LETTER
541 Rule CA 1948 only - Mar 14 2:01 1:00 D
542 Rule CA 1949 only - Jan 1 2:00 0 S
543 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D
544 Rule CA 1950 1961 - Sep lastSun 2:00 0 S
545 Rule CA 1962 1966 - Oct lastSun 2:00 0 S
547 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 20:00u
548 -8:00 US P%sT 1946
549 -8:00 CA P%sT 1967
550 -8:00 US P%sT
553 # AK%sT is the modern abbreviation for -09 per USNO.
555 # From Paul Eggert (2017-06-15):
557 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
558 # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the
560 # formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2.
561 # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1
562 # Sitka workers did not change their calendars until Sunday, 1867-10-20,
564 # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25.
565 # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf
566 # Include only the time zone part of this transition, ignoring the switch
572 # destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants
573 # were unaware of the US acquisition of Alaska, much less of any calendar or
574 # time change. However, the Russian-influenced part of Alaska did observe
575 # Russian time, and it is more accurate to model this than to ignore it.
576 # The database format requires an exact transition time; use the Russian
577 # salute as a somewhat-arbitrary time for the formal transfer of control for
578 # all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the
581 # From Paul Eggert (2014-07-18):
582 # One opinion of the early 1980s turmoil in Alaska over time zones and
583 # daylight saving time appeared as graffiti on a Juneau airport wall:
585 # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01.
586 # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html
588 # Steve Ferguson (2011-01-31) referred to the following source:
589 # Norris F. Keeping time in Alaska: national directives, local response.
590 # Alaska History 2001;16(1-2).
591 # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/
593 # From Arthur David Olson (2011-02-01):
594 # Here's database-relevant material from the 2001 "Alaska History" article:
597 # 1980, Juneau and other nearby communities would move to Yukon Time.
599 # Pacific Time.
603 # northern Southeast reverted to Pacific Time on October 26.
606 # unanimously to keep the reservation on Pacific Time.
609 # bound to follow time zones imposed by neighboring jurisdictions.
614 # From Arthur David Olson (2011-02-09):
620 # that meant they were on Pacific time, they said no - they were on their
621 # own time. I asked about daylight saving; they said it wasn't used. I
624 # From Arthur David Olson (2011-08-17):
628 # From Steffen Thorsen (2015-11-09):
630 # their time to AKST and are going to follow Alaska's DST, switching
632 # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
634 # From Ryan Stanley (2018-11-06):
637 # They will be gmtoff=-28800 year-round.
638 # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/
640 # From Paul Eggert (2018-12-16):
641 # In a 2018-12-11 special election, Metlakatla voted to go back to
642 # Alaska time (including daylight saving time) starting next year.
643 # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/
645 # From Ryan Stanley (2019-01-11):
647 # From Tim Parenti (2019-01-11):
649 # "fall back" will be on Sunday 2019-01-20 at 02:00:
651 # So they won't be waiting for Alaska to join them on 2019-03-10, but will
654 # From Paul Eggert (2023-01-23):
659 Zone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32
660 -8:57:41 - LMT 1900 Aug 20 12:00
661 -8:00 - PST 1942
662 -8:00 US P%sT 1946
663 -8:00 - PST 1969
664 -8:00 US P%sT 1980 Apr 27 2:00
665 -9:00 US Y%sT 1980 Oct 26 2:00
666 -8:00 US P%sT 1983 Oct 30 2:00
667 -9:00 US Y%sT 1983 Nov 30
668 -9:00 US AK%sT
669 Zone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30
670 -9:01:13 - LMT 1900 Aug 20 12:00
671 -8:00 - PST 1942
672 -8:00 US P%sT 1946
673 -8:00 - PST 1969
674 -8:00 US P%sT 1983 Oct 30 2:00
675 -9:00 US Y%sT 1983 Nov 30
676 -9:00 US AK%sT
677 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55
678 -8:46:18 - LMT 1900 Aug 20 12:00
679 -8:00 - PST 1942
680 -8:00 US P%sT 1946
681 -8:00 - PST 1969
682 -8:00 US P%sT 1983 Oct 30 2:00
683 -8:00 - PST 2015 Nov 1 2:00
684 -9:00 US AK%sT 2018 Nov 4 2:00
685 -8:00 - PST 2019 Jan 20 2:00
686 -9:00 US AK%sT
687 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18
688 -9:18:55 - LMT 1900 Aug 20 12:00
689 -9:00 - YST 1942
690 -9:00 US Y%sT 1946
691 -9:00 - YST 1969
692 -9:00 US Y%sT 1983 Nov 30
693 -9:00 US AK%sT
694 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37
695 -9:59:36 - LMT 1900 Aug 20 12:00
696 -10:00 - AST 1942
697 -10:00 US A%sT 1967 Apr
698 -10:00 - AHST 1969
699 -10:00 US AH%sT 1983 Oct 30 2:00
700 -9:00 US Y%sT 1983 Nov 30
701 -9:00 US AK%sT
702 Zone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35
703 -11:01:38 - LMT 1900 Aug 20 12:00
704 -11:00 - NST 1942
705 -11:00 US N%sT 1946
706 -11:00 - NST 1967 Apr
707 -11:00 - BST 1969
708 -11:00 US B%sT 1983 Oct 30 2:00
709 -9:00 US Y%sT 1983 Nov 30
710 -9:00 US AK%sT
711 Zone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35
712 -11:46:38 - LMT 1900 Aug 20 12:00
713 -11:00 - NST 1942
714 -11:00 US N%sT 1946
715 -11:00 - NST 1967 Apr
716 -11:00 - BST 1969
717 -11:00 US B%sT 1983 Oct 30 2:00
718 -10:00 US AH%sT 1983 Nov 30
719 -10:00 US H%sT
722 # Kiska observed Tokyo date and time during Japanese occupation from
723 # 1942-06-06 to 1943-07-29, and similarly for Attu from 1942-06-07 to
724 # 1943-05-29 (all dates American). Both islands are now uninhabited.
727 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
730 # From David Flater (2004-11-09):
731 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
733 # suggests that Unalaska deviated from statutory time from early 1967
738 # location not on Alaska Standard Time. The following resolution was
741 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
742 # January 14, Alaska Standard Time.) This resolution was passed with
747 # From Arthur David Olson (2010-12-09):
748 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
749 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
752 # and indicates that standard time was adopted effective noon, January
756 # act," (page 220), that year-round daylight saving time was in effect
757 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
759 # effective the second Sunday of June, 1947 (page 219, with no time of
764 # From Arthur David Olson (2011-01-19):
767 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act
769 # year, the standard time of this Territory shall be advanced one
774 # which date the standard time of this Territory shall be restored to
779 # Note that 1933-05-21 was a Sunday.
780 # We're left to guess the time of day when Act 163 was approved; guess noon.
783 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00
784 -10:30 - HST 1933 Apr 30 2:00
785 -10:30 1:00 HDT 1933 May 21 12:00
786 -10:30 US H%sT 1947 Jun 8 2:00
787 -10:00 - HST
793 # From Paul Eggert (2002-10-20):
796 # Daylight Saving Time web page
797 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
799 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
800 # time, but by federal law railroads, airlines, bus lines, military
802 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix
803 # Gazette says that was the date the law changed, and that 04-01 was
805 # Arizona used standard time all year, again with exceptions only as
807 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
809 # Shanks says the 1944 experiment came to an end on 1944-03-17.
813 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 19:00u
814 -7:00 US M%sT 1944 Jan 1 0:01
815 -7:00 - MST 1944 Apr 1 0:01
816 -7:00 US M%sT 1944 Oct 1 0:01
817 -7:00 - MST 1967
818 -7:00 US M%sT 1968 Mar 21
819 -7:00 - MST
821 # From Arthur David Olson (1988-02-13):
823 # notes in private correspondence dated 1987-12-28 that "Presently, only the
824 # Navajo Nation participates in the Daylight Saving Time policy, due to its
828 # From Paul Eggert (2013-08-26):
840 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 20:00u
841 -8:00 US P%sT 1923 May 13 2:00
842 -7:00 US M%sT 1974
843 -7:00 - MST 1974 Feb 3 2:00
844 -7:00 US M%sT
848 # For a map of Indiana's time zone regions, see:
851 # From Paul Eggert (2018-11-30):
852 # A brief but entertaining history of time in Indiana describes a 1949 debate
853 # in the Indiana House where city legislators (who favored "fast time")
855 # "Lacking enough votes, the city faction tries to filibuster until time runs
857 # R-Madison, leans over the gallery railing and forces the official clock
862 # is simply ignored by fast-time communities."
863 # How Indiana went from 'God's time' to split zones and daylight-saving.
864 # Indianapolis Star. 2018-11-27 14:58 -05.
865 # https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/
867 # From Paul Eggert (2007-08-17):
871 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
874 # - Dearborn and Ohio counties have been like America/New_York.
876 # - Clark, Floyd, and Harrison counties have been like
879 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
880 # and Switzerland counties have their own time zone histories as noted below.
882 # Shanks partitioned Indiana into 345 regions, each with its own time history,
891 # From Paul Eggert (2014-06-26):
892 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
893 # says "DOT is relocating the time zone boundary in Indiana to move Starke,
895 # Eastern Time Zone to the Central Time Zone.... The effective date of
897 # changeover date from standard time to Daylight Saving Time."
902 # From Gwillim Law (2007-02-10):
904 # going to switch from Central to Eastern Time on March 11, 2007....
907 # Rule NAME FROM TO - IN ON AT SAVE LETTER
908 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
909 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
910 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
912 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 18:00u
913 -6:00 US C%sT 1920
914 -6:00 Indianapolis C%sT 1942
915 -6:00 US C%sT 1946
916 -6:00 Indianapolis C%sT 1955 Apr 24 2:00
917 -5:00 - EST 1957 Sep 29 2:00
918 -6:00 - CST 1958 Apr 27 2:00
919 -5:00 - EST 1969
920 -5:00 US E%sT 1971
921 -5:00 - EST 2006
922 -5:00 US E%sT
926 # Rule NAME FROM TO - IN ON AT SAVE LETTER
927 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
928 Rule Marengo 1951 only - Sep lastSun 2:00 0 S
929 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
930 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
932 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 18:00u
933 -6:00 US C%sT 1951
934 -6:00 Marengo C%sT 1961 Apr 30 2:00
935 -5:00 - EST 1969
936 -5:00 US E%sT 1974 Jan 6 2:00
937 -6:00 1:00 CDT 1974 Oct 27 2:00
938 -5:00 US E%sT 1976
939 -5:00 - EST 2006
940 -5:00 US E%sT
943 # switched from eastern to central time in April 2006, then switched back
945 # Rule NAME FROM TO - IN ON AT SAVE LETTER
946 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D
947 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S
948 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D
949 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S
950 Rule Vincennes 1955 only - May 1 0:00 1:00 D
951 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D
952 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S
953 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S
954 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S
956 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 18:00u
957 -6:00 US C%sT 1946
958 -6:00 Vincennes C%sT 1964 Apr 26 2:00
959 -5:00 - EST 1969
960 -5:00 US E%sT 1971
961 -5:00 - EST 2006 Apr 2 2:00
962 -6:00 US C%sT 2007 Nov 4 2:00
963 -5:00 US E%sT
965 # Perry County, Indiana, switched from eastern to central time in April 2006.
966 # From Alois Treindl (2019-07-09):
970 # Rule NAME FROM TO - IN ON AT SAVE LETTER
971 Rule Perry 1955 only - May 1 0:00 1:00 D
972 Rule Perry 1955 1960 - Sep lastSun 2:00 0 S
973 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D
974 Rule Perry 1961 1963 - Oct lastSun 2:00 0 S
976 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 18:00u
977 -6:00 US C%sT 1946
978 -6:00 Perry C%sT 1964 Apr 26 2:00
979 -5:00 - EST 1967 Oct 29 2:00
980 -6:00 US C%sT 1969 Apr 27 2:00
981 -5:00 US E%sT 1971
982 -5:00 - EST 2006 Apr 2 2:00
983 -6:00 US C%sT
985 # Pike County, Indiana moved from central to eastern time in 1977,
987 # Rule NAME FROM TO - IN ON AT SAVE LETTER
988 Rule Pike 1955 only - May 1 0:00 1:00 D
989 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S
990 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D
991 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S
993 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 18:00u
994 -6:00 US C%sT 1955
995 -6:00 Pike C%sT 1965 Apr 25 2:00
996 -5:00 - EST 1966 Oct 30 2:00
997 -6:00 US C%sT 1977 Oct 30 2:00
998 -5:00 - EST 2006 Apr 2 2:00
999 -6:00 US C%sT 2007 Nov 4 2:00
1000 -5:00 US E%sT
1002 # Starke County, Indiana moved from central to eastern time in 1991,
1004 # From Arthur David Olson (1991-10-28):
1005 # An article on page A3 of the Sunday, 1991-10-27 Washington Post
1006 # notes that Starke County switched from Central time to Eastern time as of
1007 # 1991-10-27.
1008 # Rule NAME FROM TO - IN ON AT SAVE LETTER
1009 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
1010 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
1011 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
1012 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
1013 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
1015 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 18:00u
1016 -6:00 US C%sT 1947
1017 -6:00 Starke C%sT 1962 Apr 29 2:00
1018 -5:00 - EST 1963 Oct 27 2:00
1019 -6:00 US C%sT 1991 Oct 27 2:00
1020 -5:00 - EST 2006 Apr 2 2:00
1021 -6:00 US C%sT
1023 # Pulaski County, Indiana, switched from eastern to central time in
1025 # Rule NAME FROM TO - IN ON AT SAVE LETTER
1026 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D
1027 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S
1028 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S
1029 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S
1031 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 18:00u
1032 -6:00 US C%sT 1946
1033 -6:00 Pulaski C%sT 1961 Apr 30 2:00
1034 -5:00 - EST 1969
1035 -5:00 US E%sT 1971
1036 -5:00 - EST 2006 Apr 2 2:00
1037 -6:00 US C%sT 2007 Mar 11 2:00
1038 -5:00 US E%sT
1042 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 18:00u
1043 -6:00 US C%sT 1954 Apr 25 2:00
1044 -5:00 - EST 1969
1045 -5:00 US E%sT 1973
1046 -5:00 - EST 2006
1047 -5:00 US E%sT
1049 # From Paul Eggert (2018-03-20):
1050 # The Louisville & Nashville Railroad's 1883-11-18 change occurred at
1051 # 10:00 old local time; train were supposed to come to a standstill
1053 # clear how this matched civil time in Louisville, so for now continue
1054 # to assume Louisville switched at noon new local time, like New York.
1056 # From Michael Deckers (2019-08-06):
1058 # the switch in Louisville on 1946-04-28 was on 00:01
1059 # From Paul Eggert (2019-08-26):
1060 # That source was the Louisville Courier-Journal, 1946-04-27, p 4.
1061 # Shanks gives 02:00 for all 20th-century transition times in Louisville.
1067 # Rule NAME FROM TO - IN ON AT SAVE LETTER
1068 Rule Louisville 1921 only - May 1 2:00 1:00 D
1069 Rule Louisville 1921 only - Sep 1 2:00 0 S
1070 Rule Louisville 1941 only - Apr lastSun 2:00 1:00 D
1071 Rule Louisville 1941 only - Sep lastSun 2:00 0 S
1072 Rule Louisville 1946 only - Apr lastSun 0:01 1:00 D
1073 Rule Louisville 1946 only - Jun 2 2:00 0 S
1074 Rule Louisville 1950 1961 - Apr lastSun 2:00 1:00 D
1075 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
1076 Rule Louisville 1956 1961 - Oct lastSun 2:00 0 S
1078 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 18:00u
1079 -6:00 US C%sT 1921
1080 -6:00 Louisville C%sT 1942
1081 -6:00 US C%sT 1946
1082 -6:00 Louisville C%sT 1961 Jul 23 2:00
1083 -5:00 - EST 1968
1084 -5:00 US E%sT 1974 Jan 6 2:00
1085 -6:00 1:00 CDT 1974 Oct 27 2:00
1086 -5:00 US E%sT
1091 # http://www.lake-cumberland.com/life/archive/news990129time.shtml
1092 # (1999-01-29) via WKYM-101.7:
1094 # the Central to the Eastern time zone.... The Wayne County government made
1097 # August indicated they would like to change to "fast time" also.
1099 # location in the Central time zone.
1101 # From Rich Wales (2000-08-29):
1103 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
1104 # (-0500) time. They won't "fall back" this year. See Sara Shipley,
1105 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
1107 # From Paul Eggert (2001-07-16):
1109 # Federal Register 65, 160 (2000-08-17), pp 50154-50158.
1110 # https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm
1112 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 18:00u
1113 -6:00 US C%sT 1946
1114 -6:00 - CST 1968
1115 -6:00 US C%sT 2000 Oct 29 2:00
1116 -5:00 US E%sT
1119 # From Rives McDow (2000-08-30):
1122 # previously split between MST and CST) ... 1990-10
1123 # Starke County, IN (from CST to EST) ... 1991-10
1124 # Oliver County, ND (from MST to CST) ... 1992-10
1125 # West Wendover, NV (from PST TO MST) ... 1999-10
1126 # Wayne County, KY (from CST to EST) ... 2000-10
1128 # From Paul Eggert (2001-07-17):
1133 # West Wendover, NV officially switched from Pacific to mountain time on
1134 # 1999-10-31. See the
1135 # Federal Register 64, 203 (1999-10-21), pp 56705-56707.
1136 # https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm
1138 # on mountain time, and the rule merely made this official;
1143 # From Bob Devine (1988-01-28):
1146 # From Paul Eggert (1999-03-31):
1147 # Shanks writes that Michigan started using standard time on 1885-09-18,
1148 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
1151 # local time until 1900 when the City Council decreed that clocks should
1152 # be put back twenty-eight minutes to Central Standard Time. Half the
1154 # was rescinded and the city reverted to Sun time. A derisive offer to
1156 # Committee on Sewers. Then, in 1905, Central time was adopted
1161 # From Paul Eggert (2001-03-06):
1166 # From Paul Eggert (2019-07-06):
1168 # not start daylight saving time when the rest of the US did.
1171 # 1967-06-14, in an article "State Adjusting to Switch to Fast Time"
1174 # observed DST until 1967-10-29 00:01, that time of day seems to be
1176 # same time as the rest of the US. Also, although Shanks reports no DST in
1181 # Rule NAME FROM TO - IN ON AT SAVE LETTER
1182 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
1183 Rule Detroit 1948 only - Sep lastSun 2:00 0 S
1185 Zone America/Detroit -5:32:11 - LMT 1905
1186 -6:00 - CST 1915 May 15 2:00
1187 -5:00 - EST 1942
1188 -5:00 US E%sT 1946
1189 -5:00 Detroit E%sT 1967 Jun 14 0:01
1190 -5:00 US E%sT 1969
1191 -5:00 - EST 1973
1192 -5:00 US E%sT 1975
1193 -5:00 - EST 1975 Apr 27 2:00
1194 -5:00 US E%sT
1198 # Rule NAME FROM TO - IN ON AT SAVE LETTER
1199 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
1200 Rule Menominee 1946 only - Sep lastSun 2:00 0 S
1201 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
1202 Rule Menominee 1966 only - Oct lastSun 2:00 0 S
1204 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
1205 -6:00 US C%sT 1946
1206 -6:00 Menominee C%sT 1969 Apr 27 2:00
1207 -5:00 - EST 1973 Apr 29 2:00
1208 -6:00 US C%sT
1215 # US lighthouse 1917/1996-09
1218 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1224 # From Paul Eggert (2017-02-10):
1232 # for time zone data was the International Air Transport
1240 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1243 # Pearce C. The Great Daylight Saving Time Controversy.
1244 # Australian Ebook Publisher. 2017. ISBN 978-1-925516-96-8.
1246 # Edward W. Whitman, World Time Differences,
1251 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
1252 # [PDF] (1914-03)
1254 # For the 1911/1912 establishment of standard time in French possessions, see:
1262 # From Alain LaBonté (1994-11-14):
1263 # I post here the time zone abbreviations standardized in Canada
1264 # for both English and French in the CAN/CSA-Z234.4-89 standard....
1266 # UTC Standard time Daylight saving time
1268 # -2:30 - - HAT NDT
1269 # -3 - - HAA ADT
1270 # -3:30 HNT NST - -
1271 # -4 HNA AST HAE EDT
1272 # -5 HNE EST HAC CDT
1273 # -6 HNC CST HAR MDT
1274 # -7 HNR MST HAP PDT
1275 # -8 HNP PST HAY YDT
1276 # -9 HNY YST - -
1278 # HN: Heure Normale ST: Standard Time
1279 # HA: Heure Avancée DT: Daylight saving Time
1288 # T: de Terre-Neuve
1291 # From Paul Eggert (1994-11-22):
1297 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1298 # 2007-03-01):
1302 # https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm
1305 # Daylight saving time will be extended by four weeks starting in 2007....
1308 # [For New Brunswick] the new legislation dictates that the time change is to
1310 # https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
1318 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
1322 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1332 # following link and search for "Daylight Savings Time Change". Press the
1333 # "Daylight Savings Time Change" link; it will fire off a popup using
1339 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
1341 # From Paul Eggert (2014-10-18):
1343 # "It's about TIME", _Canadian Geographic_ (September-October 1998)
1346 # time and daylight saving time arrangements in Canada circa 1998.
1348 # National Research Council Canada maintains info about time zones and DST.
1349 # https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
1350 # https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
1353 # From Paul Eggert (2006-06-27):
1354 # For now, assume all of DST-observing Canada will fall into line with the
1357 # From Chris Walton (2011-12-01)
1362 # 'Sunday the CPR went back to the old system of time...'
1363 # '... The daylight saving scheme was dropped all over Canada at the same time,'
1364 # These statements refer to a transition from daylight time to standard time
1372 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1373 Rule Canada 1918 only - Apr 14 2:00 1:00 D
1374 Rule Canada 1918 only - Oct 27 2:00 0 S
1375 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War
1376 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace
1377 Rule Canada 1945 only - Sep 30 2:00 0 S
1378 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
1379 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S
1380 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D
1381 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D
1382 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S
1387 # From Paul Eggert (2017-10-14):
1388 # Legally Labrador should observe Newfoundland time; see:
1389 # McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07
1390 # http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/
1395 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1396 Rule StJohns 1917 only - Apr 8 2:00 1:00 D
1397 Rule StJohns 1917 only - Sep 17 2:00 0 S
1399 Rule StJohns 1919 only - May 5 23:00 1:00 D
1400 Rule StJohns 1919 only - Aug 12 23:00 0 S
1401 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
1402 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
1403 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
1404 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
1406 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D
1407 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S
1409 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
1411 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
1412 # Apr 30 - Sep 24; go with Shanks & Pottenger.
1413 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
1414 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
1415 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
1416 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
1417 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S
1418 # From Paul Eggert (2000-10-02):
1419 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
1420 # at 00:01 local time. For now, assume it started in 1987.
1422 # From Michael Pelley (2011-09-12):
1424 # changes to the Newfoundland Standard Time Act have been proclaimed.
1426 # Time to Standard Time and from Standard Time to Daylight Savings Time
1431 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery
1436 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
1437 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
1438 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
1439 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
1440 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D
1441 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S
1445 Zone America/St_Johns -3:30:52 - LMT 1884
1446 -3:30:52 StJohns N%sT 1918
1447 -3:30:52 Canada N%sT 1919
1448 -3:30:52 StJohns N%sT 1935 Mar 30
1449 -3:30 StJohns N%sT 1942 May 11
1450 -3:30 Canada N%sT 1946
1451 -3:30 StJohns N%sT 2011 Nov
1452 -3:30 Canada N%sT
1456 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1458 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
1459 -3:30:52 - NST 1918
1460 -3:30:52 Canada N%sT 1919
1461 -3:30:52 - NST 1935 Mar 30
1462 -3:30 - NST 1936
1463 -3:30 StJohns N%sT 1942 May 11
1464 -3:30 Canada N%sT 1946
1465 -3:30 StJohns N%sT 1966 Mar 15 2:00
1466 -4:00 StJohns A%sT 2011 Nov
1467 -4:00 Canada A%sT
1471 # Îles-de-la-Madeleine, Listuguj reserve
1473 # From Brian Inglis (2015-07-20):
1475 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1476 # Sydney shares the same time history as Glace Bay, so was
1481 # From Paul Eggert (2015-07-20):
1486 # Shanks & Pottenger also write that Liverpool, NS was the only town
1490 # From Jeffery Nichols (2020-01-09):
1491 # America/Halifax ... also applies to Îles-de-la-Madeleine and the Listuguj
1493 # (Legal Time Act, CQLR c T-5.1), but the legislative debates surrounding that
1495 # regions, which suggests that they have always been in-line with Halifax.
1497 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1498 Rule Halifax 1916 only - Apr 1 0:00 1:00 D
1499 Rule Halifax 1916 only - Oct 1 0:00 0 S
1500 Rule Halifax 1920 only - May 9 0:00 1:00 D
1501 Rule Halifax 1920 only - Aug 29 0:00 0 S
1502 Rule Halifax 1921 only - May 6 0:00 1:00 D
1503 Rule Halifax 1921 1922 - Sep 5 0:00 0 S
1504 Rule Halifax 1922 only - Apr 30 0:00 1:00 D
1505 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
1506 Rule Halifax 1923 only - Sep 4 0:00 0 S
1507 Rule Halifax 1924 only - Sep 15 0:00 0 S
1508 Rule Halifax 1925 only - Sep 28 0:00 0 S
1509 Rule Halifax 1926 only - May 16 0:00 1:00 D
1510 Rule Halifax 1926 only - Sep 13 0:00 0 S
1511 Rule Halifax 1927 only - May 1 0:00 1:00 D
1512 Rule Halifax 1927 only - Sep 26 0:00 0 S
1513 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
1514 Rule Halifax 1928 only - Sep 9 0:00 0 S
1515 Rule Halifax 1929 only - Sep 3 0:00 0 S
1516 Rule Halifax 1930 only - Sep 15 0:00 0 S
1517 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
1518 Rule Halifax 1932 only - May 1 0:00 1:00 D
1519 Rule Halifax 1933 only - Apr 30 0:00 1:00 D
1520 Rule Halifax 1933 only - Oct 2 0:00 0 S
1521 Rule Halifax 1934 only - May 20 0:00 1:00 D
1522 Rule Halifax 1934 only - Sep 16 0:00 0 S
1523 Rule Halifax 1935 only - Jun 2 0:00 1:00 D
1524 Rule Halifax 1935 only - Sep 30 0:00 0 S
1525 Rule Halifax 1936 only - Jun 1 0:00 1:00 D
1526 Rule Halifax 1936 only - Sep 14 0:00 0 S
1527 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
1528 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
1529 Rule Halifax 1939 only - May 28 0:00 1:00 D
1530 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
1531 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
1532 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
1533 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
1534 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
1535 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
1536 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
1537 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
1538 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
1540 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
1541 -4:00 Halifax A%sT 1918
1542 -4:00 Canada A%sT 1919
1543 -4:00 Halifax A%sT 1942 Feb 9 2:00s
1544 -4:00 Canada A%sT 1946
1545 -4:00 Halifax A%sT 1974
1546 -4:00 Canada A%sT
1547 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
1548 -4:00 Canada A%sT 1953
1549 -4:00 Halifax A%sT 1954
1550 -4:00 - AST 1972
1551 -4:00 Halifax A%sT 1974
1552 -4:00 Canada A%sT
1556 # From Paul Eggert (2007-01-31):
1557 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1559 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1563 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1564 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D
1565 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S
1566 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D
1567 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S
1568 Rule Moncton 1939 only - May 27 1:00 1:00 D
1569 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S
1570 Rule Moncton 1940 only - May 19 1:00 1:00 D
1571 Rule Moncton 1941 only - May 4 1:00 1:00 D
1572 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
1573 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
1574 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
1575 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
1576 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
1578 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
1579 -5:00 - EST 1902 Jun 15
1580 -4:00 Canada A%sT 1933
1581 -4:00 Moncton A%sT 1942
1582 -4:00 Canada A%sT 1946
1583 -4:00 Moncton A%sT 1973
1584 -4:00 Canada A%sT 1993
1585 -4:00 Moncton A%sT 2007
1586 -4:00 Canada A%sT
1590 # From Paul Eggert (2020-01-10):
1597 # From Mark Brader (2003-07-26):
1599 # effective Saturday, 1912-06-22, 22:00; the article mentions that
1602 # 1912-08-31 (no time mentioned), but it was met with considerable
1604 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1605 # presumably that should be -07-06. (1912-06-19, -07-12; also letters
1608 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1610 # From Paul Eggert (2017-07-08):
1612 # time became a comic failure in Orillia. Toronto Star 2017-07-08.
1613 # https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html
1615 # From Mark Brader (2010-03-06):
1617 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
1619 # time at 2 am Sunday morning (which agrees with the database), and that:
1621 # The one-hour setback will go into effect throughout most of Ontario,
1622 # except in areas like Windsor which remains on standard time all year.
1632 # From Chris Walton (2024-01-09):
1634 # time instead of midnight.... Toronto Daily Star - ...
1635 # April 2, 1947 - Page 39 ... April 7, 1948 - Page 13 ...
1636 # April 2, 1949 - Page 1 ... April 7, 1949 - Page 24 ...
1637 # November 25, 1949 - Page 52 ... April 21, 1950 - Page 14 ...
1638 # September 19, 1950 - Page 46 ... September 20, 1950 - Page 3 ...
1639 # November 24, 1950 - Page 21
1641 # From Arthur David Olson (2010-07-17):
1643 # "Standard Time and Time Zones in Canada" appeared in
1645 # volume 26, number 2 (February 1932) and, as of 2010-07-17,
1651 # A list of the places in Canada using daylight saving time would
1654 # and towns, it is found that the following places used daylight sav-
1658 # Province Daylight saving time used
1664 # Quebec Mont-Royal
1672 # Chambly-Canton Beaulieu
1686 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1687 Rule Toronto 1919 only - Mar 30 23:30 1:00 D
1688 Rule Toronto 1919 only - Oct 26 0:00 0 S
1689 Rule Toronto 1920 only - May 2 2:00 1:00 D
1690 Rule Toronto 1920 only - Sep 26 0:00 0 S
1691 Rule Toronto 1921 only - May 15 2:00 1:00 D
1692 Rule Toronto 1921 only - Sep 15 2:00 0 S
1693 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D
1694 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1696 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S
1697 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
1698 Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S
1699 Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D
1700 Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D
1701 Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S
1702 Rule Toronto 1945 1948 - Sep lastSun 2:00 0 S
1703 Rule Toronto 1946 1973 - Apr lastSun 2:00 1:00 D
1704 Rule Toronto 1949 1950 - Nov lastSun 2:00 0 S
1705 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S
1707 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1708 # is wrong, and that he had confirmed it by checking the 1971-10-30
1709 # Toronto Star, which said that DST was ending 1971-10-31 as usual.
1710 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S
1715 Zone America/Toronto -5:17:32 - LMT 1895
1716 -5:00 Canada E%sT 1919
1717 -5:00 Toronto E%sT 1942 Feb 9 2:00s
1718 -5:00 Canada E%sT 1946
1719 -5:00 Toronto E%sT 1974
1720 -5:00 Canada E%sT
1726 # From Rob Douglas (2006-04-06):
1727 # the old Manitoba Time Act - as amended by Bill 2, assented to
1729 # "between two o'clock Central Standard Time in the morning of
1731 # Standard Time in the morning of the last Sunday of October next
1732 # following, one hour in advance of Central Standard Time."...
1733 # I believe that the English legislation [of the old time act] had
1735 # Also, as far as I can tell, there was no order-in-council varying
1736 # the time of Daylight Saving Time for 2005 and so the provisions of
1737 # the 1987 version would apply - the changeover was at 2:00 Central
1738 # Standard Time (i.e. not until 3:00 Central Daylight Time).
1740 # From Paul Eggert (2006-04-10):
1745 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1746 Rule Winn 1916 only - Apr 23 0:00 1:00 D
1747 Rule Winn 1916 only - Sep 17 0:00 0 S
1748 Rule Winn 1918 only - Apr 14 2:00 1:00 D
1749 Rule Winn 1918 only - Oct 27 2:00 0 S
1750 Rule Winn 1937 only - May 16 2:00 1:00 D
1751 Rule Winn 1937 only - Sep 26 2:00 0 S
1752 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War
1753 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace
1754 Rule Winn 1945 only - Sep lastSun 2:00 0 S
1755 Rule Winn 1946 only - May 12 2:00 1:00 D
1756 Rule Winn 1946 only - Oct 13 2:00 0 S
1757 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
1758 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
1759 Rule Winn 1950 only - May 1 2:00 1:00 D
1760 Rule Winn 1950 only - Sep 30 2:00 0 S
1761 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
1762 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
1763 Rule Winn 1959 only - Oct lastSun 2:00 0 S
1764 Rule Winn 1960 only - Sep lastSun 2:00 0 S
1765 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
1766 Rule Winn 1963 only - Sep 22 2:00 0 S
1767 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D
1768 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S
1769 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
1771 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
1772 -6:00 Winn C%sT 2006
1773 -6:00 Canada C%sT
1778 # From Mark Brader (2003-07-26):
1780 # level. As the [Toronto] Star put it (1912-06-07), "While people
1783 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1785 # the summer". The discrepancy between municipal time and railroad
1786 # time was noted.
1788 # From Paul Eggert (2003-07-27):
1789 # Willett (1914-03) notes that DST "has been in operation ... in the
1792 # From Paul Eggert (2019-07-25):
1793 # Pearce's book says Regina observed DST in 1914-1917. No dates and times,
1798 # From Paul Eggert (2006-03-22):
1805 # From W. Jones (1992-11-06):
1811 # Saskatchewan is split by a time zone meridian (105W) and over the years
1814 # referendum favoured legislating common time practices.
1816 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1820 # follow Mountain Time rules (thus 1 hour difference in the winter and
1825 # on one time zone having its school in another, such that a mom had to
1831 # From Chris Walton (2006-06-26):
1832 # The Saskatchewan time act which was last updated in 1996 is about 30 pages
1836 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1837 Rule Regina 1918 only - Apr 14 2:00 1:00 D
1838 Rule Regina 1918 only - Oct 27 2:00 0 S
1839 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
1840 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
1841 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
1842 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
1843 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
1844 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
1845 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War
1846 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace
1847 Rule Regina 1945 only - Sep lastSun 2:00 0 S
1848 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
1849 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
1850 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D
1851 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S
1852 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D
1853 Rule Regina 1959 only - Oct lastSun 2:00 0 S
1855 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
1856 Rule Swift 1957 only - Oct lastSun 2:00 0 S
1857 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
1858 Rule Swift 1959 only - Oct lastSun 2:00 0 S
1859 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
1861 Zone America/Regina -6:58:36 - LMT 1905 Sep
1862 -7:00 Regina M%sT 1960 Apr lastSun 2:00
1863 -6:00 - CST
1864 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
1865 -7:00 Canada M%sT 1946 Apr lastSun 2:00
1866 -7:00 Regina M%sT 1950
1867 -7:00 Swift M%sT 1972 Apr lastSun 2:00
1868 -6:00 - CST
1873 # From Alois Treindl (2019-07-19):
1877 # From Paul Eggert (2019-07-25):
1879 # Mountain Standard Time without DST, and that "anyone who broke that law
1884 # ISBN 978-1459739123.
1886 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1887 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
1888 Rule Edm 1918 only - Oct 27 2:00 0 S
1889 Rule Edm 1919 only - May 27 2:00 0 S
1890 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
1891 Rule Edm 1920 only - Oct lastSun 2:00 0 S
1892 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
1893 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War
1894 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace
1895 Rule Edm 1945 only - Sep lastSun 2:00 0 S
1896 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
1897 Rule Edm 1947 only - Sep lastSun 2:00 0 S
1898 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
1899 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S
1901 Zone America/Edmonton -7:33:52 - LMT 1906 Sep
1902 -7:00 Edm M%sT 1987
1903 -7:00 Canada M%sT
1908 # From Paul Eggert (2006-03-22):
1913 # From Matt Johnson (2015-09-21):
1917 # http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html
1919 # From Tim Parenti (2015-09-23):
1921 # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a
1922 # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has
1923 # been on MST (-0700) like Dawson Creek since it advanced its clocks on
1924 # 2015-03-08.
1926 # From Paul Eggert (2019-07-25):
1928 # Alois Treindl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily
1929 # Province. He also cited the 1946-09-28 Victoria Daily Times, which said
1937 # observed DST in 1941 from 07-07 through 09-27; see
1938 # https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941
1941 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1942 Rule Vanc 1918 only - Apr 14 2:00 1:00 D
1943 Rule Vanc 1918 only - Oct 27 2:00 0 S
1944 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
1945 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
1946 Rule Vanc 1945 only - Sep 30 2:00 0 S
1947 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
1948 Rule Vanc 1946 only - Sep 29 2:00 0 S
1949 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
1950 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
1952 Zone America/Vancouver -8:12:28 - LMT 1884
1953 -8:00 Vanc P%sT 1987
1954 -8:00 Canada P%sT
1955 Zone America/Dawson_Creek -8:00:56 - LMT 1884
1956 -8:00 Canada P%sT 1947
1957 -8:00 Vanc P%sT 1972 Aug 30 2:00
1958 -7:00 - MST
1959 Zone America/Fort_Nelson -8:10:47 - LMT 1884
1960 -8:00 Vanc P%sT 1946
1961 -8:00 - PST 1947
1962 -8:00 Vanc P%sT 1987
1963 -8:00 Canada P%sT 2015 Mar 8 2:00
1964 -7:00 - MST
1969 # From Chris Walton (2022-11-06):
1970 # Whitehorse Star - Thursday April 22, 1965 - page 1
1974 # Also, the start time shown in the article is vague; it simply says "after
1977 # Whitehorse Star - Monday October 25, 1965 - page 15 ...
1983 # Whitehorse Star - Thursday Feb 24,1966 - page 2
1984 # title: It's Time for YDT ...
1986 # America/Whitehorse as a permanent change from UTC-9(YST) to
1987 # UTC-8(PST) at 00:00 on Sunday February 27, 1966....
1989 # Whitehorse Star - Friday April 28,1972 - page 6
1990 # title: Daylight Saving Time for N.W.T....
1996 # From Paul Eggert (2022-11-06):
1997 # For now, assume Yukon's 1965-04-22 spring forward was 00:00 -> 02:00, as this
1998 # seems likely than 02:00 -> 04:00 and matches "after midnight".
2000 # From Paul Eggert (2006-03-22):
2002 # Mathew Englander (1996-10-07) gives the following refs:
2003 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
2004 # c. 7 defines Yukon standard time as UTC-9....
2005 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
2006 # [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html]
2007 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
2011 # From Brian Inglis (2015-04-14):
2013 # I tried to trace the history of Yukon time and found the following
2021 # articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS
2025 # standard times and daylight saving time at many locations across Canada,
2026 # with time zone maps, tables and calculations for Canadian Sunrise, Sunset,
2028 # and table showing current Universal Time offsets, and may be useful as
2031 # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
2032 # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
2035 # Yukon standard time is the local mean time at the one hundred and
2036 # thirty-fifth meridian.
2038 # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
2039 # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
2040 # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
2043 # (1) Subject to this section, standard time shall be reckoned as nine
2044 # hours behind Greenwich Time and called Yukon Standard Time.
2047 # varying the manner of reckoning standard time.
2049 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
2052 # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
2053 # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
2055 # Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
2057 # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
2060 # 2. Yukon (East) Standard Time as defined by section 36 of the
2061 # Interpretation Ordinance from and after mid-night on the 28th day of May,
2062 # 1967 shall be reckoned in the same manner as Pacific Standard Time, that
2063 # is to say, eight hours behind Greenwich Time in the area of the Yukon
2067 # longitude west, Yukon (West) Standard Time shall be reckoned as nine
2068 # hours behind Greenwich Time.
2070 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
2071 # https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
2077 # 2. Yukon Standard Time as defined by section 36 of the Interpretation
2078 # Act from and after midnight on the twenty-eighth day of October, 1973
2079 # shall be reckoned in the same manner as Pacific Standard Time, that is
2080 # to say eight hours behind Greenwich Time.
2083 # https://mm.icann.org/pipermail/tz/attachments/20201125/d5adc93b/CAYTOIC1980-02DST1980-01-04-0001.pdf
2085 # * Yukon Daylight Saving Time, YOIC 1987/56
2086 # https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
2092 # Standard Time shall be reckoned as seven hours behind Greenwich Time and
2093 # called Yukon Daylight Saving Time.
2097 # * Yukon Daylight Saving Time 2006, YOIC 2006/127
2098 # https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
2101 # 1. In Yukon each year the time for general purposes shall be 7 hours
2102 # behind Greenwich mean time during the period commencing at two o'clock
2105 # Yukon Daylight Saving Time.
2107 # 2. Order-in-Council 1987/56 is revoked.
2112 # https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
2114 # From Chris Walton (2022-11-06):
2115 # The 5th edition of the Atlas of Canada contains a time zone map that
2116 # shows both legislated and observed time zone boundaries.
2117 # All communities on Baffin Island are shown to be observing Eastern time.
2121 # From Rives McDow (1999-09-04):
2122 # Nunavut ... moved ... to incorporate the whole territory into one time zone.
2123 # Nunavut moves to single time zone Oct. 31
2126 # From Paul Eggert (1999-09-20):
2131 # From Paul Eggert (2000-10-02):
2135 # The Canadian Forces station at Alert uses Eastern Time while the
2138 # Central, Eastern and Atlantic Time zones only uses Eastern Time.
2140 # Central Time and Southampton Island [in the Central zone] is not
2144 # Nunavut now has two time zones (2000-11-10):
2146 # Cambridge Bay to operate on central time year-round, putting them
2149 # Nunavut's unified time zone, refusing to shift to eastern time with
2151 # central time, while Kugluktuk, even farther west, reverted to
2152 # mountain time, which they had used before the advent of Nunavut's
2153 # unified time zone in 1999.
2155 # From Rives McDow (2001-01-20), quoting the Nunavut government:
2158 # From Paul Eggert (2000-12-04):
2161 # From Rives McDow (2001-03-07):
2163 # that effective 2001-04-01, the territory of Nunavut will revert
2164 # back to three time zones (mountain, central, and eastern). Of the
2169 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
2171 # From Gwillim Law (2005-05-21):
2174 # (from a 1998 Canadian Geographic article), the de facto and de jure time
2175 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
2177 # I wasn't able to find how far back this time regimen goes, but since it
2181 # From Paul Eggert (2014-10-17):
2185 # see above for an up-to-date link.
2187 # From Chris Walton (2007-03-01):
2189 # Nunavut) moved from Central Time to Eastern Time last November.
2192 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
2194 # From Chris Walton (2011-03-21):
2198 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2201 # went back to using UTC-6 in the winter of 2007-2008...
2204 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
2206 # to confirm that Resolute Bay was still operating on UTC-5. It was
2207 # explained to me that Resolute Bay had been on the Eastern Time zone
2208 # (EST) in the winter, and was now back on the Central Time zone (CDT).
2209 # i.e. the time zone had changed twice in the last year but the clocks
2210 # had not moved. The residents had to know which time zone they were in
2213 # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I
2216 # information. I found an e-mail address for somebody by the name of
2218 # Arctic Co-operatives." I was under the impression that Stephanie lived
2222 # Resolute Bay had been using Central Standard Time over the winter of
2223 # 2010-2011 and that the clocks had therefore been moved one hour ahead
2225 # had previously experimented with Eastern Standard Time but he could not
2228 # On March 17/2011 I searched the Web to find an e-mail address of
2230 # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz
2236 # I sent Aziz an e-mail asking when Resolute Bay had stopped using
2237 # Eastern Standard Time.
2239 # Aziz responded quickly with this: "hi, The time was not changed for the
2241 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in
2246 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz
2256 # From Tim Parenti (2020-03-05):
2257 # The government of Yukon announced [yesterday] the cessation of seasonal time
2259 # will remain on [UTC-07]. ... [The government] found 93 per cent of
2260 # respondents wanted to end seasonal time changes and, of that group, 70 per
2261 # cent wanted 'permanent Pacific Daylight Saving Time.'"
2262 # https://www.cbc.ca/news/canada/north/yukon-end-daylight-saving-time-1.5486358
2266 # https://yukon.ca/en/news/yukon-end-seasonal-time-change
2268 # From Andrew G. Smith (2020-09-24):
2269 # Yukon has completed its regulatory change to be on UTC -7 year-round....
2271 # What we have done is re-defined Yukon Standard Time, as we are
2275 # From Paul Eggert (2020-09-24):
2276 # tzdb uses the obsolete YST abbreviation for standard time in Yukon through
2277 # about 1970, and uses PST for standard time in Yukon since then. Consistent
2278 # with that, use MST for -07, the new standard time in Yukon effective Nov. 1.
2280 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
2281 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
2282 Rule NT_YK 1918 only - Oct 27 2:00 0 S
2283 Rule NT_YK 1919 only - May 25 2:00 1:00 D
2284 Rule NT_YK 1919 only - Nov 1 0:00 0 S
2285 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
2286 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
2287 Rule NT_YK 1945 only - Sep 30 2:00 0 S
2288 Rule NT_YK 1972 1986 - Apr lastSun 2:00 1:00 D
2289 Rule NT_YK 1972 2006 - Oct lastSun 2:00 0 S
2290 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
2291 Rule Yukon 1965 only - Apr lastSun 0:00 2:00 DD
2292 Rule Yukon 1965 only - Oct lastSun 2:00 0 S
2295 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est.
2296 -5:00 NT_YK E%sT 1999 Oct 31 2:00
2297 -6:00 Canada C%sT 2000 Oct 29 2:00
2298 -5:00 Canada E%sT
2300 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded
2301 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2302 -5:00 - EST 2001 Apr 1 3:00
2303 -6:00 Canada C%sT 2006 Oct 29 2:00
2304 -5:00 - EST 2007 Mar 11 3:00
2305 -6:00 Canada C%sT
2307 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded
2308 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2309 -5:00 - EST 2001 Apr 1 3:00
2310 -6:00 Canada C%sT
2312 Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.?
2313 -7:00 NT_YK M%sT 1999 Oct 31 2:00
2314 -6:00 Canada C%sT 2000 Oct 29 2:00
2315 -5:00 - EST 2000 Nov 5 0:00
2316 -6:00 - CST 2001 Apr 1 3:00
2317 -7:00 Canada M%sT
2318 Zone America/Inuvik 0 - -00 1953 # Inuvik founded
2319 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
2320 -7:00 NT_YK M%sT 1980
2321 -7:00 Canada M%sT
2322 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
2323 -9:00 NT_YK Y%sT 1965
2324 -9:00 Yukon Y%sT 1966 Feb 27 0:00
2325 -8:00 - PST 1980
2326 -8:00 Canada P%sT 2020 Nov 1
2327 -7:00 - MST
2328 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
2329 -9:00 NT_YK Y%sT 1965
2330 -9:00 Yukon Y%sT 1973 Oct 28 0:00
2331 -8:00 - PST 1980
2332 -8:00 Canada P%sT 2020 Nov 1
2333 -7:00 - MST
2340 # From Paul Eggert (2014-12-07):
2343 # history of Mexican local time (in Spanish)
2348 # S&P report that Baja was at -8:00 in 1922/1923.
2349 # S&P say the 1930 transition in Baja was 1930-11-16.
2351 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
2353 # From Gwillim Law (2001-02-20):
2359 # From Heitor David Pinto (2024-08-04):
2364 # In 1981, the decree changing Campeche, Yucatán and Quintana Roo to UTC-5
2368 # In 1982, the decree returning Campeche and Yucatán to UTC-6 specified that
2372 # Quintana Roo changed to UTC-6 on 4 January 1983 at 0:00, and again
2373 # to UTC-5 on 26 October 1997 at 2:00....
2377 # Durango, Coahuila, Nuevo León and Tamaulipas were set to UTC-7 on 1 January
2378 # 1922, and changed to UTC-6 on 10 June 1927. Then Durango, Coahuila and
2379 # Nuevo León (but not Tamaulipas) returned to UTC-7 on 15 November 1930,
2380 # observed DST in 1931, and changed again to UTC-6 on 1 April 1932....
2387 # specifying a time, so I suppose that it should be considered at 0:00.
2391 # Sinaloa and Nayarit to UTC-7 was published on 24 April, but it said that it
2396 # Baja California Sur, Sonora, Sinaloa and Nayarit never used UTC-8. The ...
2397 # 14 January 1949 ... change [to UTC-8] only occurred in Baja California.
2400 # In 1945, the decree changing Baja California to UTC-8 specified that it
2405 # In 1948, the decree changing Baja California to UTC-7 specified that it
2411 # In 1949, the decree changing Baja California to UTC-8 was published on 13
2416 # Baja California also observed UTC-7 from 1 May to 24 September 1950,
2429 # From Paul Eggert (2024-08-18):
2430 # For now, maintain the slightly-different history for Baja California,
2434 # From Alan Perry (1996-02-15):
2438 # ------------- Begin Forwarded Message -------------
2444 # - Baja California Norte (the Mexico/BajaNorte TZ)
2445 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
2446 # - The rest of the country (the Mexico/General TZ)
2461 # -------------- End Forwarded Message --------------
2462 # From Paul Eggert (1996-06-12):
2464 # "Diario Oficial: Time Zone Changeover" (1996-01-04).
2465 # http://mexico-travel.com/extra/timezone_eng.html
2467 # From Rives McDow (1998-10-08):
2469 # (i.e. UTC -0600 and -0500 as of 1998-08-02).
2471 # From Rives McDow (2000-01-10):
2472 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
2474 # savings time so as to stay on the same time zone as the southern part of
2478 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
2484 # From Gwillim Law (2001-01-19):
2487 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
2488 # that Summer Time will be reduced from seven to five months, starting
2491 # [translated], says "summer time will ... take effect on the first Sunday
2494 # From Arthur David Olson (2001-01-25):
2495 # The 2001-01-24 traditional Washington Post contained the page one
2497 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2499 # Mexico City and its 20 million residents on a different time than
2501 # observation of Daylight Saving Time.
2505 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2506 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03).
2508 # From Paul Eggert (2001-03-03):
2510 # https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html
2512 # * Sonora will continue to observe standard time.
2516 # * The decree does not affect federal-controlled facilities including
2521 # From Jesper Nørgaard (2001-04-01):
2531 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
2533 # From Reuters (2001-09-04):
2536 # capital will be in a different time zone from the rest of the nation
2539 # standard time. "This is so residents of the Federal District are not
2540 # subject to unexpected time changes," a statement from the court said.
2542 # From Jesper Nørgaard Welen (2002-03-12):
2545 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
2548 # From Steffen Thorsen (2009-12-28):
2556 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
2561 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2565 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2568 # https://www.timeanddate.com/news/time/north-mexico-dst-change.html
2570 # From Arthur David Olson (2010-01-20):
2588 # From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
2591 # http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
2592 # "With this change, the time conflict that has existed between the municipios
2594 # end. The latter declared itself in rebellion 15 years ago when a time change
2595 # was initiated in Mexico, and since then it has refused to change its time
2598 # From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
2599 # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html
2600 # "...the new time zone will come into effect at two o'clock on the first Sunday
2602 # time..."
2605 # From Carlos Raúl Perasso (2015-02-02):
2610 # 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
2612 # 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the
2615 # 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
2617 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2619 # 5- The islands, reefs and keys shall take their timezone from the
2622 # From Paul Eggert (2022-10-28):
2626 # and in addition changes all of Chihuahua to -06 with no DST.
2628 # From Heitor David Pinto (2022-11-28):
2629 # Now the northern [municipios] want to have the same time zone as the
2630 # respective neighboring cities in the US, for example Juárez in UTC-7 with
2631 # DST, matching El Paso, and Ojinaga in UTC-6 with DST, matching Presidio....
2633 # so the time change would occur on November 30 at 0:00.
2636 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
2637 Rule Mexico 1931 only - Apr 30 0:00 1:00 D
2638 Rule Mexico 1931 only - Oct 1 0:00 0 S
2639 Rule Mexico 1939 only - Feb 5 0:00 1:00 D
2640 Rule Mexico 1939 only - Jun 25 0:00 0 S
2641 Rule Mexico 1940 only - Dec 9 0:00 1:00 D
2642 Rule Mexico 1941 only - Apr 1 0:00 0 S
2643 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
2644 Rule Mexico 1944 only - May 1 0:00 0 S
2645 Rule Mexico 1950 only - Feb 12 0:00 1:00 D
2646 Rule Mexico 1950 only - Jul 30 0:00 0 S
2647 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2648 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2649 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2650 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2651 Rule Mexico 2002 2022 - Apr Sun>=1 2:00 1:00 D
2652 Rule Mexico 2002 2022 - Oct lastSun 2:00 0 S
2655 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 6:00u
2656 -6:00 - CST 1981 Dec 26 2:00
2657 -5:00 - EST 1983 Jan 4 0:00
2658 -6:00 Mexico C%sT 1997 Oct 26 2:00
2659 -5:00 Mexico E%sT 1998 Aug 2 2:00
2660 -6:00 Mexico C%sT 2015 Feb 1 2:00
2661 -5:00 - EST
2663 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 6:00u
2664 -6:00 - CST 1981 Dec 26 2:00
2665 -5:00 - EST 1982 Nov 2 2:00
2666 -6:00 Mexico C%sT
2675 Zone America/Matamoros -6:30:00 - LMT 1922 Jan 1 6:00u
2676 -6:00 - CST 1988
2677 -6:00 US C%sT 1989
2678 -6:00 Mexico C%sT 2010
2679 -6:00 US C%sT
2681 Zone America/Monterrey -6:41:16 - LMT 1922 Jan 1 6:00u
2682 -7:00 - MST 1927 Jun 10
2683 -6:00 - CST 1930 Nov 15
2684 -7:00 Mexico M%sT 1932 Apr 1
2685 -6:00 - CST 1988
2686 -6:00 US C%sT 1989
2687 -6:00 Mexico C%sT
2689 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u
2690 -7:00 - MST 1927 Jun 10
2691 -6:00 - CST 1930 Nov 15
2692 -7:00 Mexico M%sT 1932 Apr 1
2693 -6:00 Mexico C%sT 2001 Sep 30 2:00
2694 -6:00 - CST 2002 Feb 20
2695 -6:00 Mexico C%sT
2696 # Chihuahua (near US border - western side)
2699 # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf
2700 Zone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u
2701 -7:00 - MST 1927 Jun 10
2702 -6:00 - CST 1930 Nov 15
2703 -7:00 Mexico M%sT 1932 Apr 1
2704 -6:00 - CST 1996
2705 -6:00 Mexico C%sT 1998
2706 -6:00 - CST 1998 Apr Sun>=1 3:00
2707 -7:00 Mexico M%sT 2010
2708 -7:00 US M%sT 2022 Oct 30 2:00
2709 -6:00 - CST 2022 Nov 30 0:00
2710 -7:00 US M%sT
2711 # Chihuahua (near US border - eastern side)
2714 # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf
2715 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u
2716 -7:00 - MST 1927 Jun 10
2717 -6:00 - CST 1930 Nov 15
2718 -7:00 Mexico M%sT 1932 Apr 1
2719 -6:00 - CST 1996
2720 -6:00 Mexico C%sT 1998
2721 -6:00 - CST 1998 Apr Sun>=1 3:00
2722 -7:00 Mexico M%sT 2010
2723 -7:00 US M%sT 2022 Oct 30 2:00
2724 -6:00 - CST 2022 Nov 30 0:00
2725 -6:00 US C%sT
2727 Zone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u
2728 -7:00 - MST 1927 Jun 10
2729 -6:00 - CST 1930 Nov 15
2730 -7:00 Mexico M%sT 1932 Apr 1
2731 -6:00 - CST 1996
2732 -6:00 Mexico C%sT 1998
2733 -6:00 - CST 1998 Apr Sun>=1 3:00
2734 -7:00 Mexico M%sT 2022 Oct 30 2:00
2735 -6:00 - CST
2737 Zone America/Hermosillo -7:23:52 - LMT 1922 Jan 1 7:00u
2738 -7:00 - MST 1927 Jun 10
2739 -6:00 - CST 1930 Nov 15
2740 -7:00 Mexico M%sT 1932 Apr 1
2741 -6:00 - CST 1942 Apr 24
2742 -7:00 - MST 1996
2743 -7:00 Mexico M%sT 1999
2744 -7:00 - MST
2747 Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u
2748 -7:00 - MST 1927 Jun 10
2749 -6:00 - CST 1930 Nov 15
2750 -7:00 Mexico M%sT 1932 Apr 1
2751 -6:00 - CST 1942 Apr 24
2752 -7:00 - MST 1970
2753 -7:00 Mexico M%sT
2757 # From Alexander Krivenyshev (2010-04-21):
2759 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
2760 # share the same time zone as nearby city Puerto Vallarta, Jalisco).
2769 # 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
2772 # Puerto Vallarta and Bahía de Banderas: One Time Zone
2773 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml
2777 # will allow Bahía de Banderas and Puerto Vallarta to share the same time
2781 # From Arthur David Olson (2010-05-01):
2784 Zone America/Bahia_Banderas -7:01:00 - LMT 1922 Jan 1 7:00u
2785 -7:00 - MST 1927 Jun 10
2786 -6:00 - CST 1930 Nov 15
2787 -7:00 Mexico M%sT 1932 Apr 1
2788 -6:00 - CST 1942 Apr 24
2789 -7:00 - MST 1970
2790 -7:00 Mexico M%sT 2010 Apr 4 2:00
2791 -6:00 Mexico C%sT
2794 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 7:00u
2795 -7:00 - MST 1924
2796 -8:00 - PST 1927 Jun 10
2797 -7:00 - MST 1930 Nov 15
2798 -8:00 - PST 1931 Apr 1
2799 -8:00 1:00 PDT 1931 Sep 30
2800 -8:00 - PST 1942 Apr 24
2801 -8:00 1:00 PWT 1945 Aug 14 23:00u
2802 -8:00 1:00 PPT 1945 Nov 15 # Peace
2803 -8:00 - PST 1948 Apr 5
2804 -8:00 1:00 PDT 1949 Jan 14
2805 -8:00 - PST 1950 May 1
2806 -8:00 1:00 PDT 1950 Sep 24
2807 -8:00 - PST 1951 Apr 29 2:00
2808 -8:00 1:00 PDT 1951 Sep 30 2:00
2809 -8:00 - PST 1952 Apr 27 2:00
2810 -8:00 1:00 PDT 1952 Sep 28 2:00
2811 -8:00 - PST 1954
2812 -8:00 CA P%sT 1961
2813 -8:00 - PST 1976
2814 -8:00 US P%sT 1996
2815 -8:00 Mexico P%sT 2001
2816 -8:00 US P%sT 2002 Feb 20
2817 -8:00 Mexico P%sT 2010
2818 -8:00 US P%sT
2819 # From Paul Eggert (2006-03-22):
2826 # DST-observance was a town-by-town matter back then. This concerns
2831 # From Paul Eggert (2015-10-08):
2837 # From Paul Eggert (2022-10-28):
2849 # For 1899 Milne gives -3:58:29.2.
2851 # From P Chan (2020-12-09 and 2020-12-11):
2852 # Standard time of GMT-4 was adopted in 1911.
2853 # Definition of Time Act, 1911 (1911-7) [1911-08-28]
2858 # DST was observed in 1942-44.
2859 # Defence (Daylight Saving) Regulations, 1942, 1942-04-13
2860 # Defence (Daylight Saving) (Repeal) Regulations, 1942, 1942-08-22
2861 # Defence (Daylight Saving) Regulations, 1943, 1943-04-16
2862 # Defence (Daylight Saving) (Repeal) Regulations, 1943, 1943-09-01
2863 # Defence (Daylight Saving) Regulations, 1944, 1944-03-21
2864 # [Defence (Daylight Saving) (Amendment) Regulations 1944, 1944-03-28]
2865 # Defence (Daylight Saving) (Repeal) Regulations, 1944, 1944-08-30
2867 # 1914-, Subsidiary Legis., Annual Vols. OCLC Number: 226290591
2868 # 1942: Image Nos. 527-528, 555-556
2869 # 1943: Image Nos. 178-179, 198
2870 # 1944: Image Nos. 113-115, 129
2873 # From Tim Parenti (2021-02-20):
2877 # time to "exactly three and a half hours later than Greenwich mean time", as
2880 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
2881 Rule Barb 1942 only - Apr 19 5:00u 1:00 D
2882 Rule Barb 1942 only - Aug 31 6:00u 0 S
2883 Rule Barb 1943 only - May 2 5:00u 1:00 D
2884 Rule Barb 1943 only - Sep 5 6:00u 0 S
2885 Rule Barb 1944 only - Apr 10 5:00u 0:30 -
2886 Rule Barb 1944 only - Sep 10 6:00u 0 S
2887 Rule Barb 1977 only - Jun 12 2:00 1:00 D
2888 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
2889 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
2890 Rule Barb 1979 only - Sep 30 2:00 0 S
2891 Rule Barb 1980 only - Sep 25 2:00 0 S
2893 #STDOFF -3:58:29.2
2894 Zone America/Barbados -3:58:29 - LMT 1911 Aug 28 # Bridgetown
2895 -4:00 Barb A%sT 1944
2896 -4:00 Barb AST/-0330 1945
2897 -4:00 Barb A%sT
2901 # From P Chan (2020-11-03):
2902 # Below are some laws related to the time in British Honduras/Belize:
2904 # Definition of Time Ordinance, 1927 (No.4 of 1927) [1927-04-01]
2905 # Ordinances of British Honduras Passed in the Year 1927, p 19-20
2906 # https://books.google.com/books?id=LqEpAQAAMAAJ&pg=RA3-PA19
2908 # Definition of Time (Amendment) Ordinance, 1942 (No. 5 of 1942) [1942-06-27]
2909 # Ordinances of British Honduras Passed in the Year 1942, p 31-32
2910 # https://books.google.com/books?id=h6MpAQAAMAAJ&pg=RA6-PA95-IA44
2912 # Definition of Time Ordinance, 1945 (No. 19 of 1945) [1945-12-15]
2913 # Ordinances of British Honduras Passed in the Year 1945, p 49-50
2914 # https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA2-PP1
2916 # Definition of Time Ordinance, 1947 (No. 1 of 1947) [1947-03-11]
2917 # Ordinances of British Honduras Passed in the Year 1947, p 1-2
2918 # https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA3-PA1
2920 # Time (Definition of) Ordinance (Chapter 180)
2924 # Time (Definition of) (Amendment) Ordinance, 1968 (No. 13 of 1968) [1968-08-03]
2925 # https://books.google.com/books?id=xij7KEB_58wC&pg=RA1-PA428-IA9
2927 # Definition of Time Act (Chapter 339)
2931 # From Paul Eggert (2020-11-03):
2936 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
2937 Rule Belize 1918 1941 - Oct Sat>=1 24:00 0:30 -0530
2938 Rule Belize 1919 1942 - Feb Sat>=8 24:00 0 CST
2939 Rule Belize 1942 only - Jun 27 24:00 1:00 CWT
2940 Rule Belize 1945 only - Aug 14 23:00u 1:00 CPT
2941 Rule Belize 1945 only - Dec 15 24:00 0 CST
2942 Rule Belize 1947 1967 - Oct Sat>=1 24:00 0:30 -0530
2943 Rule Belize 1948 1968 - Feb Sat>=8 24:00 0 CST
2944 Rule Belize 1973 only - Dec 5 0:00 1:00 CDT
2945 Rule Belize 1974 only - Feb 9 0:00 0 CST
2946 Rule Belize 1982 only - Dec 18 0:00 1:00 CDT
2947 Rule Belize 1983 only - Feb 12 0:00 0 CST
2949 Zone America/Belize -5:52:48 - LMT 1912 Apr 1
2950 -6:00 Belize %s
2954 # From Paul Eggert (2022-07-27):
2955 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2958 # It is not known when this time became standard for Bermuda; guess 1890.
2959 # The transition to -04 was specified by:
2960 # 1930: The Time Zone Act, 1929 (1929: No. 39) [1929-11-08]
2961 # https://books.google.com/books?id=7tdMAQAAIAAJ&pg=RA54-PP1
2963 # From P Chan (2020-11-20):
2965 # Library - Digital Collection which includes The Royal Gazette (RG) until 1957
2971 # Daylight Saving Act, 1917 (1917 No. 13) [1917-04-02]
2972 # Bermuda Acts and Resolves 1917, p 37-38
2973 # https://books.google.com/books?id=M-lCAQAAMAAJ&pg=PA36-IA2
2974 # RG, 1917-04-04, p 6 [42340] gives the spring forward date.
2977 # Daylight Saving Act, 1918 (1918 No. 9) [1918-04-06]
2979 # https://books.google.com/books?id=K-lCAQAAMAAJ&pg=RA1-PA7
2981 # Note that local mean time was still used before 1930.
2988 # RG, 1942-01-08, p 2, 1942-10-12, p 2 , 1943-03-06, p 2, 1943-09-03, p 1,
2989 # 1944-02-29, p 6, 1944-09-20, p 2, 1945-02-13, p 2, 1945-11-03, p 1
2992 # RG, 1946-03-16 p 1,1946-04-13 p 1
2997 # RG, 1947-02-27, p 1, 1947-05-15, p 1, 1947-09-13, p 1, 1947-12-30, p 1
2999 # 1948-1952: fourth Sunday in May 02:00 to first Sunday in September 02:00
3005 # RG, 1948-04-13, p 1, 1948-05-22, p 1, 1948-09-04, p 1, 1949-05-21, p1,
3006 # 1949-09-03, p 1, 1950-05-27 p 1, 1950-09-02, p 1, 1951-05-27, p 1,
3007 # 1951-09-01, p 1, 1952-05-23, p 1, 1952-09-26, p 1, 1952-12-21, p 8
3009 # In 1953-1955, the House of Assembly rejected DST each year. [158996],
3010 # [162620], [166720] RG, 1953-05-02, p 1, 1954-04-01 p 1, 1955-03-12, p 1
3013 # Time Zone (Seasonal Variation) Act, 1956 (1956: No.44) [1956-05-25]
3014 # Bermuda Public Acts 1956, p 331-332
3018 # RG, 1956-12-13, p 1
3022 # https://books.google.com/books?id=r9hMAQAAIAAJ&pg=RA23-PA1
3026 # From Dan Jones, reporting in The Royal Gazette (2006-06-26):
3028 # in March, until the first Sunday in November. And, after the Time Zone
3033 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3034 Rule Bermuda 1917 only - Apr 5 24:00 1:00 -
3035 Rule Bermuda 1917 only - Sep 30 24:00 0 -
3036 Rule Bermuda 1918 only - Apr 13 24:00 1:00 -
3037 Rule Bermuda 1918 only - Sep 15 24:00 0 S
3038 Rule Bermuda 1942 only - Jan 11 2:00 1:00 D
3039 Rule Bermuda 1942 only - Oct 18 2:00 0 S
3040 Rule Bermuda 1943 only - Mar 21 2:00 1:00 D
3041 Rule Bermuda 1943 only - Oct 31 2:00 0 S
3042 Rule Bermuda 1944 1945 - Mar Sun>=8 2:00 1:00 D
3043 Rule Bermuda 1944 1945 - Nov Sun>=1 2:00 0 S
3044 Rule Bermuda 1947 only - May Sun>=15 2:00 1:00 D
3045 Rule Bermuda 1947 only - Sep Sun>=8 2:00 0 S
3046 Rule Bermuda 1948 1952 - May Sun>=22 2:00 1:00 D
3047 Rule Bermuda 1948 1952 - Sep Sun>=1 2:00 0 S
3048 Rule Bermuda 1956 only - May Sun>=22 2:00 1:00 D
3049 Rule Bermuda 1956 only - Oct lastSun 2:00 0 S
3052 #STDOFF -4:19:18.3
3053 Zone Atlantic/Bermuda -4:19:18 - LMT 1890 # Hamilton
3054 -4:19:18 Bermuda BMT/BST 1930 Jan 1 2:00
3055 -4:00 Bermuda A%sT 1974 Apr 28 2:00
3056 -4:00 Canada A%sT 1976
3057 -4:00 US A%sT
3061 # Milne gives -5:36:13.3 as San José mean time.
3063 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3064 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
3065 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
3066 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
3067 # IATA SSIM (1991-09) says the following was at 1:00;
3069 Rule CR 1991 only - Jul 1 0:00 0 S
3070 Rule CR 1992 only - Mar 15 0:00 0 S
3073 #STDOFF -5:36:13.3
3074 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José
3075 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time
3076 -6:00 CR C%sT
3082 # From Paul Eggert (2013-02-21):
3083 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
3084 # for the port, and -5:30 for meteorological observations.
3087 # From Arthur David Olson (1999-03-29):
3088 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
3091 # During the game, play-by-play announcer Jim Hunter noted that
3093 # Time today." (The "two hour" remark referred to losing one hour of
3094 # sleep on 1999-03-28 - when the announcers were in Cuba as it switched
3095 # to DST - and one more hour on 1999-04-04 - when the announcers will have
3098 # From Steffen Thorsen (2013-11-11):
3100 # years before. The correct date should be Sunday 2004-03-28 00:00 ...
3103 # From Evert van der Veer via Steffen Thorsen (2004-10-28):
3104 # Cuba is not going back to standard time this year.
3105 # From Paul Eggert (2006-03-22):
3106 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
3109 # to normal hours (after daylight saving time)".
3112 # From Carlos A. Carnero Delgado (2005-11-12):
3113 # This year (just like in 2004-2005) there's no change in time zone
3114 # adjustment in Cuba. We will stay in daylight saving time:
3117 # From Jesper Nørgaard Welen (2006-10-21):
3122 # watches should be set back one hour - going back to 00:00 hours - returning
3125 # From Paul Eggert (2007-03-02):
3129 # except that it switches at midnight standard time as usual.
3131 # From Steffen Thorsen (2007-10-25):
3133 # earlier - on the last Sunday of October, just like in 2006.
3137 # http://www.prensalatina.com.mx/article.asp?ID={4CC32C1B-A9F7-42FB-8A07-8631AFC923AF}&language=ES
3140 # From Alex Krivenyshev (2007-10-25):
3148 # From Arthur David Olson (2008-03-09):
3150 # Time. At 9:44 local time I used RealPlayer to listen to
3153 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
3154 # indicating that Cuba is still on standard time.
3156 # From Steffen Thorsen (2008-03-12):
3157 # It seems that Cuba will start DST on Sunday, 2007-03-16...
3159 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
3162 # https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
3167 # observed since 1963, but with the exception of 1970 - an exception
3174 # From Jesper Nørgaard Welen (2008-03-13):
3175 # The Cuban time change has just been confirmed on the most authoritative
3182 # From Arthur David Olson (2008-03-12):
3185 # From Alexander Krivenyshev (2009-03-04)
3186 # According to the Radio Reloj - Cuba will start Daylight Saving Time on
3187 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
3193 # From Arthur David Olson (2009-03-09)
3197 # the time was announced as "diez cinco" - the same time as here, indicating
3200 # From Steffen Thorsen (2011-03-08):
3201 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
3209 # https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
3211 # From Steffen Thorsen (2011-10-30)
3213 # tonight, it has been delayed to 2011-11-13 at 01:00.
3216 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
3219 # https://www.timeanddate.com/news/time/cuba-time-changes-2011.html
3221 # From Steffen Thorsen (2012-03-01)
3226 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
3229 # https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
3231 # From Steffen Thorsen (2012-11-03):
3233 # to standard time on 2012-11-04:
3234 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
3235 # From Paul Eggert (2012-11-03):
3238 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3239 Rule Cuba 1928 only - Jun 10 0:00 1:00 D
3240 Rule Cuba 1928 only - Oct 10 0:00 0 S
3241 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
3242 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
3243 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
3244 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
3245 Rule Cuba 1965 only - Jun 1 0:00 1:00 D
3246 Rule Cuba 1965 only - Sep 30 0:00 0 S
3247 Rule Cuba 1966 only - May 29 0:00 1:00 D
3248 Rule Cuba 1966 only - Oct 2 0:00 0 S
3249 Rule Cuba 1967 only - Apr 8 0:00 1:00 D
3250 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
3251 Rule Cuba 1968 only - Apr 14 0:00 1:00 D
3252 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
3253 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
3254 Rule Cuba 1972 1974 - Oct 8 0:00 0 S
3255 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
3256 Rule Cuba 1978 only - May 7 0:00 1:00 D
3257 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S
3258 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
3259 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
3260 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
3261 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
3262 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
3263 Rule Cuba 1996 only - Oct 6 0:00s 0 S
3264 Rule Cuba 1997 only - Oct 12 0:00s 0 S
3265 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
3266 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S
3267 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D
3268 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D
3269 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S
3270 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D
3271 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D
3272 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D
3273 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D
3274 Rule Cuba 2011 only - Nov 13 0:00s 0 S
3275 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D
3276 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S
3277 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D
3280 Zone America/Havana -5:29:28 - LMT 1890
3281 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
3282 -5:00 Cuba C%sT
3286 # From Steffen Thorsen (2000-10-30):
3288 # time zone to Eastern Standard Time as of Sunday 29 at 2 am....
3291 # From Paul Eggert (2000-12-04):
3292 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
3294 # From Rives McDow (2000-12-01):
3304 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3305 Rule DR 1966 only - Oct 30 0:00 1:00 EDT
3306 Rule DR 1967 only - Feb 28 0:00 0 EST
3307 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430
3308 Rule DR 1970 only - Feb 21 0:00 0 EST
3309 Rule DR 1971 only - Jan 20 0:00 0 EST
3310 Rule DR 1972 1974 - Jan 21 0:00 0 EST
3312 Zone America/Santo_Domingo -4:39:36 - LMT 1890
3313 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
3314 -5:00 DR %s 1974 Oct 27
3315 -4:00 - AST 2000 Oct 29 2:00
3316 -5:00 US E%sT 2000 Dec 3 1:00
3317 -4:00 - AST
3321 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3322 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
3323 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
3327 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
3328 -6:00 Salv C%sT
3332 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
3335 # says in an article dated 2006-04-19 that the Guatemalan government had
3336 # decided on that date to advance official time by 60 minutes, to lessen the
3337 # impact of the elevated cost of oil.... Daylight saving time will last from
3338 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
3339 # From Paul Eggert (2006-06-22):
3340 # The Ministry of Energy and Mines, press release CP-15/2006
3341 # (2006-04-19), says DST ends at 24:00. See
3344 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3345 Rule Guat 1973 only - Nov 25 0:00 1:00 D
3346 Rule Guat 1974 only - Feb 24 0:00 0 S
3347 Rule Guat 1983 only - May 21 0:00 1:00 D
3348 Rule Guat 1983 only - Sep 22 0:00 0 S
3349 Rule Guat 1991 only - Mar 23 0:00 1:00 D
3350 Rule Guat 1991 only - Sep 7 0:00 0 S
3351 Rule Guat 2006 only - Apr 30 0:00 1:00 D
3352 Rule Guat 2006 only - Oct 1 0:00 0 S
3354 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
3355 -6:00 Guat C%sT
3358 # From Gwillim Law (2005-04-15):
3361 # on the Web page of the Haitian Consulate in Chicago (2005-03-31),
3362 # <http://www.haitianconsulate.org/time.doc>. Translated from French, it says:
3367 # provinces], Haiti will move to Eastern Daylight Time in the night from next
3375 # "Port-au-Prince, March 31, 2005"
3377 # From Steffen Thorsen (2006-04-04):
3388 # From Stephen Colebourne (2007-02-22):
3391 # From Steffen Thorsen (2012-03-11):
3394 # So this means they have already changed their time.
3399 # From Arthur David Olson (2012-03-11):
3400 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to
3402 # Assume a US-style fall back as well.
3404 # From Steffen Thorsen (2013-03-10):
3409 # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
3412 # From Steffen Thorsen (2016-03-12):
3413 # Jean Antoine, editor of www.haiti-reference.com informed us that Haiti
3416 # https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/
3417 # http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/
3419 # From Steffen Thorsen (2017-03-12):
3423 # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html
3425 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3426 Rule Haiti 1983 only - May 8 0:00 1:00 D
3427 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
3428 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
3431 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
3432 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
3433 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
3434 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
3435 Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D
3436 Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S
3437 Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D
3438 Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S
3440 Zone America/Port-au-Prince -4:49:20 - LMT 1890
3441 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
3442 -5:00 Haiti E%sT
3447 # From Paul Eggert (2006-05-05):
3448 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3454 # From Jesper Nørgaard Welen (2006-08-08):
3455 # It seems that Honduras has returned from DST to standard time this Monday at
3459 # From Paul Eggert (2006-08-08):
3460 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3462 # It mentions executive decree 18-2006.
3464 # From Steffen Thorsen (2006-08-17):
3469 # From Steffen Thorsen (2007-03-30):
3473 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3474 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
3475 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
3476 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
3477 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
3479 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
3480 -6:00 Hond C%sT
3485 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3486 # unspecified official document, and says "This time is used throughout the
3489 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3496 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3497 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3500 #STDOFF -5:07:10.41
3501 Zone America/Jamaica -5:07:10 - LMT 1890 # Kingston
3502 -5:07:10 - KMT 1912 Feb # Kingston Mean Time
3503 -5:00 - EST 1974
3504 -5:00 US E%sT 1984
3505 -5:00 - EST
3509 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
3510 -4:04:20 - FFMT 1911 May 1 # Fort-de-France MT
3511 -4:00 - AST 1980 Apr 6
3512 -4:00 1:00 ADT 1980 Sep 28
3513 -4:00 - AST
3519 # From Steffen Thorsen (2005-04-12):
3521 # DST on Sunday 2005-04-10, in order to save energy because of
3523 # announced, only "September" but some sites also say "mid-September".
3525 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
3526 # The Decree, no 23-2005 is available here:
3527 # 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
3529 # From Paul Eggert (2005-05-01):
3533 # From Gwillim Law (2005-04-21):
3534 # The Associated Press story on the time change, which can be found at
3537 # time that a change of clocks was applied to save energy was in the year 2000
3539 # The northamerica file says that Nicaragua has been on UTC-6 continuously
3540 # since December 1998. I wasn't able to find any details of Nicaraguan time
3544 # From Jesper Nørgaard Welen (2005-11-02):
3545 # Nicaragua left DST the 2005-10-02 at 00:00 (local time).
3546 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
3547 # (2005-09-26)
3549 # From Jesper Nørgaard Welen (2006-05-05):
3553 # advanced by sixty minutes their official time, yesterday at 2 in the
3556 # From Jesper Nørgaard Welen (2006-09-30):
3557 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3559 # The natural sun time is restored in all the national territory, in that the
3560 # time is returned one hour at 01:00 am of October 1 of 2006.
3562 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3563 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
3564 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
3565 Rule Nic 2005 only - Apr 10 0:00 1:00 D
3566 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S
3567 Rule Nic 2006 only - Apr 30 2:00 1:00 D
3568 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S
3570 Zone America/Managua -5:45:08 - LMT 1890
3571 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
3572 -6:00 - CST 1973 May
3573 -5:00 - EST 1975 Feb 16
3574 -6:00 Nic C%sT 1992 Jan 1 4:00
3575 -5:00 - EST 1992 Sep 24
3576 -6:00 - CST 1993
3577 -5:00 - EST 1997
3578 -6:00 Nic C%sT
3585 Zone America/Panama -5:18:08 - LMT 1890
3586 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time
3587 -5:00 - EST
3600 # St Kitts-Nevis
3609 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
3610 -4:00 - AST 1942 May 3
3611 -4:00 US A%sT 1946
3612 -4:00 - AST
3617 Zone America/Miquelon -3:44:40 - LMT 1911 Jun 15 # St Pierre
3618 -4:00 - AST 1980 May
3619 -3:00 - %z 1987
3620 -3:00 Canada %z
3626 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3627 # daylight saving dates for time changes have been adjusted to match
3630 # From Brian Inglis (2007-04-28):
3631 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3632 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3635 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3638 # From Paul Eggert (2014-08-19):
3639 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See:
3640 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3642 # From Chris Walton (2014-11-04):
3644 # "permanent daylight saving time" by one year....
3645 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3647 # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen:
3648 # ... agreed to the reintroduction in TCI of Daylight Saving Time (DST)
3649 # during the summer months and Standard Time, also known as Local
3650 # Time, during the winter months with effect from April 2018 ...
3651 # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3
3652 # From Paul Eggert (2017-08-26):
3654 # which makes more sense. See: Hamilton D. Time change back
3655 # by March 2018 for TCI. Magnetic Media. 2017-08-25.
3656 # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/
3658 # From P Chan (2020-11-27):
3659 # Standard Time Declaration Order 2015 (L.N. 15/2015)
3662 # Standard Time Declaration Order 2017 (L.N. 31/2017)
3665 # From Tim Parenti (2020-12-05):
3668 # order states that "the standard time to be observed throughout the Turks and
3669 # Caicos Islands shall be the same time zone as the Eastern United States of
3671 # "applies to the Eastern Standard Time as well as any changes thereto for
3672 # Daylight Saving Time." However, as clocks in Turks and Caicos approached
3673 # 02:00 -04, and thus the declared implementation time, it was still 01:00 EST
3674 # (-05), as DST in the Eastern US would not start until an hour later.
3678 # effect once clocks in the Eastern US had sprung forward, from 03:00 -04.
3679 # This discrepancy only affects the time zone abbreviation and DST flag for the
3680 # intervening hour, not wall clock times, as -04 was maintained throughout.
3683 Zone America/Grand_Turk -4:44:32 - LMT 1890
3684 #STDOFF -5:07:10.41
3685 -5:07:10 - KMT 1912 Feb # Kingston Mean Time
3686 -5:00 - EST 1979
3687 -5:00 US E%sT 2015 Mar 8 2:00
3688 -4:00 - AST 2018 Mar 11 3:00
3689 -5:00 US E%sT
3692 # coding: utf-8