Deleted Added
full compact
northamerica (309583) northamerica (325324)
1# This file is in the public domain, so clarified as of
2# 2009-05-17 by Arthur David Olson.
3
4# also includes Central America and the Caribbean
5
6# This file is by no means authoritative; if you think you know better,
7# go ahead and edit the file (and please send any changes to
8# tz@iana.org for general use in the future). For more, please see

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100# From Arthur David Olson:
101# Before the Uniform Time Act of 1966 took effect in 1967, observance of
102# Daylight Saving Time in the US was by local option, except during wartime.
103
104# From Arthur David Olson (2000-09-25):
105# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
106# In the introduction, Oboler spoke of "Eastern Peace Time."
107# An AltaVista search turned up:
1# This file is in the public domain, so clarified as of
2# 2009-05-17 by Arthur David Olson.
3
4# also includes Central America and the Caribbean
5
6# This file is by no means authoritative; if you think you know better,
7# go ahead and edit the file (and please send any changes to
8# tz@iana.org for general use in the future). For more, please see

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100# From Arthur David Olson:
101# Before the Uniform Time Act of 1966 took effect in 1967, observance of
102# Daylight Saving Time in the US was by local option, except during wartime.
103
104# From Arthur David Olson (2000-09-25):
105# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
106# In the introduction, Oboler spoke of "Eastern Peace Time."
107# An AltaVista search turned up:
108# http://rowayton.org/rhs/hstaug45.html
108# https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html
109# "When the time is announced over the radio now, it is 'Eastern Peace
110# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
111# (August 1945) by way of confirmation.
109# "When the time is announced over the radio now, it is 'Eastern Peace
110# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
111# (August 1945) by way of confirmation.
112#
113# From Paul Eggert (2017-09-23):
114# This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter.
112
113# From Joseph Gallant citing
114# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
115# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
116# to switch to London for Attlee's address, but the American people
117# never got to hear his speech live. According to one press account,
118# CBS' Bob Trout was first to announce the word of Japan's surrender,
119# but a few seconds later, NBC, ABC and Mutual also flashed the word

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173Zone EST -5:00 - EST
174Zone MST -7:00 - MST
175Zone HST -10:00 - HST
176Zone EST5EDT -5:00 US E%sT
177Zone CST6CDT -6:00 US C%sT
178Zone MST7MDT -7:00 US M%sT
179Zone PST8PDT -8:00 US P%sT
180
115
116# From Joseph Gallant citing
117# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
118# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
119# to switch to London for Attlee's address, but the American people
120# never got to hear his speech live. According to one press account,
121# CBS' Bob Trout was first to announce the word of Japan's surrender,
122# but a few seconds later, NBC, ABC and Mutual also flashed the word

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176Zone EST -5:00 - EST
177Zone MST -7:00 - MST
178Zone HST -10:00 - HST
179Zone EST5EDT -5:00 US E%sT
180Zone CST6CDT -6:00 US C%sT
181Zone MST7MDT -7:00 US M%sT
182Zone PST8PDT -8:00 US P%sT
183
181# From Bob Devine (1988-01-28):
182# ...Alaska (and Hawaii) had the timezone names changed in 1967.
183# old new
184# Pacific Standard Time(PST) -same-
185# Yukon Standard Time(YST) -same-
186# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
187# Nome Standard Time (NT) Bering Standard Time (BST)
188#
189# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
190# The YST zone now covers nearly all of the state, AHST just part
191# of the Aleutian islands. No DST.
192
193# From Paul Eggert (1995-12-19):
194# The tables below use 'NST', not 'NT', for Nome Standard Time.
195# I invented 'CAWT' for Central Alaska War Time.
196
197# From U. S. Naval Observatory (1989-01-19):
198# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
199# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
200# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
201# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
202# USA MOUNTAIN 7 H BEHIND UTC DENVER
203# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
204# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO

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245# central standard time
246# mountain standard time
247# Pacific standard time
248# Alaska standard time
249# Hawaii-Aleutian standard time
250# Samoa standard time
251# The law doesn't give abbreviations.
252#
184# From U. S. Naval Observatory (1989-01-19):
185# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
186# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
187# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
188# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
189# USA MOUNTAIN 7 H BEHIND UTC DENVER
190# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
191# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO

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232# central standard time
233# mountain standard time
234# Pacific standard time
235# Alaska standard time
236# Hawaii-Aleutian standard time
237# Samoa standard time
238# The law doesn't give abbreviations.
239#
240# From Paul Eggert (2016-12-19):
241# Here are URLs for the 1918 and 1966 legislation:
242# http://uscode.house.gov/statviewer.htm?volume=40&page=451
243# http://uscode.house.gov/statviewer.htm?volume=80&page=108
244# Although the 1918 names were officially "United States Standard
245# Eastern Time" and similarly for "Central", "Mountain", "Pacific",
246# and "Alaska", in practice "Standard" was placed just before "Time",
247# as codified in 1966. In practice, Alaska time was abbreviated "AST"
248# before 1968. Summarizing the 1967 name changes:
249# 1918 names 1967 names
250# -08 Standard Pacific Time (PST) Pacific standard time (PST)
251# -09 (unofficial) Yukon (YST) Yukon standard time (YST)
252# -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST)
253# -11 (unofficial) Nome (NST) Bering standard time (BST)
254#
253# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
254# Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time"
255# for time in Guam and the Northern Marianas. See the file "australasia".
256#
257# From Paul Eggert (2015-04-17):
258# HST and HDT are standardized abbreviations for Hawaii-Aleutian
259# standard and daylight times. See section 9.47 (p 234) of the
260# U.S. Government Printing Office Style Manual (2008)
255# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
256# Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time"
257# for time in Guam and the Northern Marianas. See the file "australasia".
258#
259# From Paul Eggert (2015-04-17):
260# HST and HDT are standardized abbreviations for Hawaii-Aleutian
261# standard and daylight times. See section 9.47 (p 234) of the
262# U.S. Government Printing Office Style Manual (2008)
261# http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
263# https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
262
263# From Arthur David Olson, 2005-08-09
264# The following was signed into law on 2005-08-08.
265#
266# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
267# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
268# U.S.C. 260a(a)) is amended--
269# (1) by striking "first Sunday of April" and inserting "second

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300# According to today's Huntsville Times
301# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1
302# a few towns on Alabama's "eastern border with Georgia, such as Phenix City
303# in Russell County, Lanett in Chambers County and some towns in Lee County,
304# set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
305# Roberts, city administrator in Phenix City. as saying "We are in the Central
306# time zone, but we do go by the Eastern time zone because so many people work
307# in Columbus."
264
265# From Arthur David Olson, 2005-08-09
266# The following was signed into law on 2005-08-08.
267#
268# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
269# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
270# U.S.C. 260a(a)) is amended--
271# (1) by striking "first Sunday of April" and inserting "second

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302# According to today's Huntsville Times
303# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1
304# a few towns on Alabama's "eastern border with Georgia, such as Phenix City
305# in Russell County, Lanett in Chambers County and some towns in Lee County,
306# set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
307# Roberts, city administrator in Phenix City. as saying "We are in the Central
308# time zone, but we do go by the Eastern time zone because so many people work
309# in Columbus."
310#
311# From Paul Eggert (2017-02-22):
312# Four cities are involved. The two not mentioned above are Smiths Station
313# and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started
314# because West Point Pepperell textile mills were in Alabama while the
315# corporate office was in Georgia, and residents voted to keep Eastern
316# time even after the mills closed. See: Kazek K. Did you know which
317# Alabama towns are in a different time zone? al.com 2017-02-06.
318# http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html
308
309# From Paul Eggert (2014-09-06):
310# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
311# says that New York City Hall time was 3 minutes 58.4 seconds fast of
312# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the
313# nearest second.
314
315# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER

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333# Washington counties), Illinois, western Indiana
334# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
335# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
336# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
337# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
338# western Tennessee, most of Texas, Wisconsin
339
340# From Larry M. Smith (2006-04-26) re Wisconsin:
319
320# From Paul Eggert (2014-09-06):
321# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
322# says that New York City Hall time was 3 minutes 58.4 seconds fast of
323# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the
324# nearest second.
325
326# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER

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344# Washington counties), Illinois, western Indiana
345# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
346# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
347# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
348# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
349# western Tennessee, most of Texas, Wisconsin
350
351# From Larry M. Smith (2006-04-26) re Wisconsin:
341# http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
352# https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf
342# is currently enforced at the 01:00 time of change. Because the local
343# "bar time" in the state corresponds to 02:00, a number of citations
344# are issued for the "sale of class 'B' alcohol after prohibited
345# hours" within the deviated hour of this change every year....
346#
347# From Douglas R. Bomberg (2007-03-12):
348# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
349# Statue 175 closer in synch with the US Congress' intent....
353# is currently enforced at the 01:00 time of change. Because the local
354# "bar time" in the state corresponds to 02:00, a number of citations
355# are issued for the "sale of class 'B' alcohol after prohibited
356# hours" within the deviated hour of this change every year....
357#
358# From Douglas R. Bomberg (2007-03-12):
359# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
360# Statue 175 closer in synch with the US Congress' intent....
350# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf
361# https://docs.legis.wisconsin.gov/2007/related/acts/3
351
352# From an email administrator of the City of Fort Pierre, SD (2015-12-21):
353# Fort Pierre is technically located in the Mountain time zone as is
354# the rest of Stanley County. Most of Stanley County and Fort Pierre
355# uses the Central time zone due to doing most of their business in
356# Pierre so it simplifies schedules. I have lived in Stanley County
357# all my life and it has been that way since I can remember. (43 years!)
358#

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389Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
390 -7:00 US M%sT 2003 Oct 26 2:00
391 -6:00 US C%sT
392
393# From Josh Findley (2011-01-21):
394# ...it appears that Mercer County, North Dakota, changed from the
395# mountain time zone to the central time zone at the last transition from
396# daylight-saving to standard time (on Nov. 7, 2010):
362
363# From an email administrator of the City of Fort Pierre, SD (2015-12-21):
364# Fort Pierre is technically located in the Mountain time zone as is
365# the rest of Stanley County. Most of Stanley County and Fort Pierre
366# uses the Central time zone due to doing most of their business in
367# Pierre so it simplifies schedules. I have lived in Stanley County
368# all my life and it has been that way since I can remember. (43 years!)
369#

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400Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
401 -7:00 US M%sT 2003 Oct 26 2:00
402 -6:00 US C%sT
403
404# From Josh Findley (2011-01-21):
405# ...it appears that Mercer County, North Dakota, changed from the
406# mountain time zone to the central time zone at the last transition from
407# daylight-saving to standard time (on Nov. 7, 2010):
397# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
408# https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
398# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
399
400# From Andy Lipscomb (2011-01-24):
401# ...according to the Census Bureau, the largest city is Beulah (although
402# it's commonly referred to as Beulah-Hazen, with Hazen being the next
403# largest city in Mercer County). Google Maps places Beulah's city hall
404# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset
405# of 6h47'07".

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440
441# From Paul Eggert (2016-08-20):
442# In early February 1948, in response to California's electricity shortage,
443# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours,
444# causing electric clocks to lose six minutes per day. (This did not change
445# legal time, and is not part of the data here.) See:
446# Ross SA. An energy crisis from the past: Northern California in 1948.
447# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley,
409# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
410
411# From Andy Lipscomb (2011-01-24):
412# ...according to the Census Bureau, the largest city is Beulah (although
413# it's commonly referred to as Beulah-Hazen, with Hazen being the next
414# largest city in Mercer County). Google Maps places Beulah's city hall
415# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset
416# of 6h47'07".

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451
452# From Paul Eggert (2016-08-20):
453# In early February 1948, in response to California's electricity shortage,
454# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours,
455# causing electric clocks to lose six minutes per day. (This did not change
456# legal time, and is not part of the data here.) See:
457# Ross SA. An energy crisis from the past: Northern California in 1948.
458# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley,
448# 1973-11. http://escholarship.org/uc/item/8x22k30c
459# 1973-11. https://escholarship.org/uc/item/8x22k30c
449#
450# In another measure to save electricity, DST was instituted from 1948-03-14
451# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move
452# the fallback transition earlier. See pages 3-4 of:
453# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf
454#
455# In response:
456#

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461#
462# On December 8 the governor exercised the option, setting the date to January 1
463# (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01).
464#
465# Despite the controversy, in 1949 California voters approved Proposition 12,
466# which established DST from April's last Sunday at 01:00 until September's
467# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
468# the fall-back date to October's last Sunday. See:
460#
461# In another measure to save electricity, DST was instituted from 1948-03-14
462# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move
463# the fallback transition earlier. See pages 3-4 of:
464# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf
465#
466# In response:
467#

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472#
473# On December 8 the governor exercised the option, setting the date to January 1
474# (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01).
475#
476# Despite the controversy, in 1949 California voters approved Proposition 12,
477# which established DST from April's last Sunday at 01:00 until September's
478# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
479# the fall-back date to October's last Sunday. See:
469# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
470# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
480# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
481# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
471#
472# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
473Rule CA 1948 only - Mar 14 2:01 1:00 D
474Rule CA 1949 only - Jan 1 2:00 0 S
475Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D
476Rule CA 1950 1961 - Sep lastSun 2:00 0 S
477Rule CA 1962 1966 - Oct lastSun 2:00 0 S
478# Zone NAME GMTOFF RULES FORMAT [UNTIL]
479Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
480 -8:00 US P%sT 1946
481 -8:00 CA P%sT 1967
482 -8:00 US P%sT
483
484# Alaska
482#
483# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
484Rule CA 1948 only - Mar 14 2:01 1:00 D
485Rule CA 1949 only - Jan 1 2:00 0 S
486Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D
487Rule CA 1950 1961 - Sep lastSun 2:00 0 S
488Rule CA 1962 1966 - Oct lastSun 2:00 0 S
489# Zone NAME GMTOFF RULES FORMAT [UNTIL]
490Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
491 -8:00 US P%sT 1946
492 -8:00 CA P%sT 1967
493 -8:00 US P%sT
494
495# Alaska
485# AK%sT is the modern abbreviation for -9:00 per USNO.
496# AK%sT is the modern abbreviation for -09 per USNO.
486#
497#
487# From Paul Eggert (2001-05-30):
498# From Paul Eggert (2017-06-15):
488# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
489# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
499# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
500# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
490# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
491# also a Friday. Include only the time zone part of this transition,
492# ignoring the switch from Julian to Gregorian, since we can't represent
493# the Julian calendar.
501# On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the
502# Russian forts and fleet at Sitka fired salutes to mark the ceremony of
503# formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2.
504# https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1
505# Sitka workers did not change their calendars until Sunday, 1867-10-20,
506# and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P).
507# From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25.
508# http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf
509# Include only the time zone part of this transition, ignoring the switch
510# from Julian to Gregorian, since we can't represent the Julian calendar.
494#
511#
495# As far as we know, none of the exact locations mentioned below were
512# As far as we know, of the locations mentioned below only Sitka was
496# permanently inhabited in 1867 by anyone using either calendar.
513# permanently inhabited in 1867 by anyone using either calendar.
497# (Yakutat was colonized by the Russians in 1799, but the settlement
498# was destroyed in 1805 by a Yakutat-kon war party.) However, there
499# were nearby inhabitants in some cases and for our purposes perhaps
500# it's best to simply use the official transition.
514# (Yakutat was colonized by the Russians in 1799, but the settlement was
515# destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants
516# were unaware of the US acquisition of Alaska, much less of any calendar or
517# time change. However, the Russian-influenced part of Alaska did observe
518# Russian time, and it is more accurate to model this than to ignore it.
519# The database format requires an exact transition time; use the Russian
520# salute as a somewhat-arbitrary time for the formal transfer of control for
521# all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the
522# local times of other Alaskan locations so that they change simultaneously.
501
502# From Paul Eggert (2014-07-18):
503# One opinion of the early-1980s turmoil in Alaska over time zones and
504# daylight saving time appeared as graffiti on a Juneau airport wall:
505# "Welcome to Juneau. Please turn your watch back to the 19th century."
506# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01.
507# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html
508#

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545# From Arthur David Olson (2011-08-17):
546# For lack of better information, assume that Metlakatla's
547# abandonment of use of daylight saving resulted from the 1983 vote.
548
549# From Steffen Thorsen (2015-11-09):
550# It seems Metlakatla did go off PST on Sunday, November 1, changing
551# their time to AKST and are going to follow Alaska's DST, switching
552# between AKST and AKDT from now on....
523
524# From Paul Eggert (2014-07-18):
525# One opinion of the early-1980s turmoil in Alaska over time zones and
526# daylight saving time appeared as graffiti on a Juneau airport wall:
527# "Welcome to Juneau. Please turn your watch back to the 19th century."
528# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01.
529# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html
530#

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567# From Arthur David Olson (2011-08-17):
568# For lack of better information, assume that Metlakatla's
569# abandonment of use of daylight saving resulted from the 1983 vote.
570
571# From Steffen Thorsen (2015-11-09):
572# It seems Metlakatla did go off PST on Sunday, November 1, changing
573# their time to AKST and are going to follow Alaska's DST, switching
574# between AKST and AKDT from now on....
553# http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
575# https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
554
555# Zone NAME GMTOFF RULES FORMAT [UNTIL]
576
577# Zone NAME GMTOFF RULES FORMAT [UNTIL]
556Zone America/Juneau 15:02:19 - LMT 1867 Oct 18
578Zone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32
557 -8:57:41 - LMT 1900 Aug 20 12:00
558 -8:00 - PST 1942
559 -8:00 US P%sT 1946
560 -8:00 - PST 1969
561 -8:00 US P%sT 1980 Apr 27 2:00
562 -9:00 US Y%sT 1980 Oct 26 2:00
563 -8:00 US P%sT 1983 Oct 30 2:00
564 -9:00 US Y%sT 1983 Nov 30
565 -9:00 US AK%sT
579 -8:57:41 - LMT 1900 Aug 20 12:00
580 -8:00 - PST 1942
581 -8:00 US P%sT 1946
582 -8:00 - PST 1969
583 -8:00 US P%sT 1980 Apr 27 2:00
584 -9:00 US Y%sT 1980 Oct 26 2:00
585 -8:00 US P%sT 1983 Oct 30 2:00
586 -9:00 US Y%sT 1983 Nov 30
587 -9:00 US AK%sT
566Zone America/Sitka 14:58:47 - LMT 1867 Oct 18
588Zone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30
567 -9:01:13 - LMT 1900 Aug 20 12:00
568 -8:00 - PST 1942
569 -8:00 US P%sT 1946
570 -8:00 - PST 1969
571 -8:00 US P%sT 1983 Oct 30 2:00
572 -9:00 US Y%sT 1983 Nov 30
573 -9:00 US AK%sT
589 -9:01:13 - LMT 1900 Aug 20 12:00
590 -8:00 - PST 1942
591 -8:00 US P%sT 1946
592 -8:00 - PST 1969
593 -8:00 US P%sT 1983 Oct 30 2:00
594 -9:00 US Y%sT 1983 Nov 30
595 -9:00 US AK%sT
574Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18
596Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55
575 -8:46:18 - LMT 1900 Aug 20 12:00
576 -8:00 - PST 1942
577 -8:00 US P%sT 1946
578 -8:00 - PST 1969
579 -8:00 US P%sT 1983 Oct 30 2:00
580 -8:00 - PST 2015 Nov 1 2:00
581 -9:00 US AK%sT
597 -8:46:18 - LMT 1900 Aug 20 12:00
598 -8:00 - PST 1942
599 -8:00 US P%sT 1946
600 -8:00 - PST 1969
601 -8:00 US P%sT 1983 Oct 30 2:00
602 -8:00 - PST 2015 Nov 1 2:00
603 -9:00 US AK%sT
582Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18
604Zone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18
583 -9:18:55 - LMT 1900 Aug 20 12:00
584 -9:00 - YST 1942
585 -9:00 US Y%sT 1946
586 -9:00 - YST 1969
587 -9:00 US Y%sT 1983 Nov 30
588 -9:00 US AK%sT
605 -9:18:55 - LMT 1900 Aug 20 12:00
606 -9:00 - YST 1942
607 -9:00 US Y%sT 1946
608 -9:00 - YST 1969
609 -9:00 US Y%sT 1983 Nov 30
610 -9:00 US AK%sT
589Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18
611Zone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37
590 -9:59:36 - LMT 1900 Aug 20 12:00
612 -9:59:36 - LMT 1900 Aug 20 12:00
591 -10:00 - CAT 1942
592 -10:00 US CAT/CAWT 1945 Aug 14 23:00u
593 -10:00 US CAT/CAPT 1946 # Peace
594 -10:00 - CAT 1967 Apr
613 -10:00 - AST 1942
614 -10:00 US A%sT 1967 Apr
595 -10:00 - AHST 1969
596 -10:00 US AH%sT 1983 Oct 30 2:00
597 -9:00 US Y%sT 1983 Nov 30
598 -9:00 US AK%sT
615 -10:00 - AHST 1969
616 -10:00 US AH%sT 1983 Oct 30 2:00
617 -9:00 US Y%sT 1983 Nov 30
618 -9:00 US AK%sT
599Zone America/Nome 12:58:21 - LMT 1867 Oct 18
619Zone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35
600 -11:01:38 - LMT 1900 Aug 20 12:00
601 -11:00 - NST 1942
602 -11:00 US N%sT 1946
603 -11:00 - NST 1967 Apr
604 -11:00 - BST 1969
605 -11:00 US B%sT 1983 Oct 30 2:00
606 -9:00 US Y%sT 1983 Nov 30
607 -9:00 US AK%sT
620 -11:01:38 - LMT 1900 Aug 20 12:00
621 -11:00 - NST 1942
622 -11:00 US N%sT 1946
623 -11:00 - NST 1967 Apr
624 -11:00 - BST 1969
625 -11:00 US B%sT 1983 Oct 30 2:00
626 -9:00 US Y%sT 1983 Nov 30
627 -9:00 US AK%sT
608Zone America/Adak 12:13:21 - LMT 1867 Oct 18
628Zone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35
609 -11:46:38 - LMT 1900 Aug 20 12:00
610 -11:00 - NST 1942
611 -11:00 US N%sT 1946
612 -11:00 - NST 1967 Apr
613 -11:00 - BST 1969
614 -11:00 US B%sT 1983 Oct 30 2:00
615 -10:00 US AH%sT 1983 Nov 30
616 -10:00 US H%sT

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636# three votes for and one against."
637
638# Hawaii
639
640# From Arthur David Olson (2010-12-09):
641# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
642# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
643# the article is available at
629 -11:46:38 - LMT 1900 Aug 20 12:00
630 -11:00 - NST 1942
631 -11:00 US N%sT 1946
632 -11:00 - NST 1967 Apr
633 -11:00 - BST 1969
634 -11:00 US B%sT 1983 Oct 30 2:00
635 -10:00 US AH%sT 1983 Nov 30
636 -10:00 US H%sT

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656# three votes for and one against."
657
658# Hawaii
659
660# From Arthur David Olson (2010-12-09):
661# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
662# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
663# the article is available at
644# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
664# https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
645# and indicates that standard time was adopted effective noon, January
646# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
647# saving for the period between the last Sunday of each April and the
648# last Sunday of each September, but less than a month later repealed the
649# act," (page 220), that year-round daylight saving time was in effect
650# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
651# when clocks changed) and that clocks were changed by 30 minutes
652# effective the second Sunday of June, 1947 (page 219, with no time of

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675# Zone NAME GMTOFF RULES FORMAT [UNTIL]
676Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00
677 -10:30 - HST 1933 Apr 30 2:00
678 -10:30 1:00 HDT 1933 May 21 12:00
679 -10:30 - HST 1942 Feb 9 2:00
680 -10:30 1:00 HDT 1945 Sep 30 2:00
681 -10:30 - HST 1947 Jun 8 2:00
682 -10:00 - HST
665# and indicates that standard time was adopted effective noon, January
666# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
667# saving for the period between the last Sunday of each April and the
668# last Sunday of each September, but less than a month later repealed the
669# act," (page 220), that year-round daylight saving time was in effect
670# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
671# when clocks changed) and that clocks were changed by 30 minutes
672# effective the second Sunday of June, 1947 (page 219, with no time of

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695# Zone NAME GMTOFF RULES FORMAT [UNTIL]
696Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00
697 -10:30 - HST 1933 Apr 30 2:00
698 -10:30 1:00 HDT 1933 May 21 12:00
699 -10:30 - HST 1942 Feb 9 2:00
700 -10:30 1:00 HDT 1945 Sep 30 2:00
701 -10:30 - HST 1947 Jun 8 2:00
702 -10:00 - HST
683Link Pacific/Honolulu Pacific/Johnston
684
685# Now we turn to US areas that have diverged from the consensus since 1970.
686
687# Arizona mostly uses MST.
688
689# From Paul Eggert (2002-10-20):
690#
691# The information in the rest of this paragraph is derived from the

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736 -8:00 US P%sT 1923 May 13 2:00
737 -7:00 US M%sT 1974
738 -7:00 - MST 1974 Feb 3 2:00
739 -7:00 US M%sT
740
741# Indiana
742#
743# For a map of Indiana's time zone regions, see:
703
704# Now we turn to US areas that have diverged from the consensus since 1970.
705
706# Arizona mostly uses MST.
707
708# From Paul Eggert (2002-10-20):
709#
710# The information in the rest of this paragraph is derived from the

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755 -8:00 US P%sT 1923 May 13 2:00
756 -7:00 US M%sT 1974
757 -7:00 - MST 1974 Feb 3 2:00
758 -7:00 US M%sT
759
760# Indiana
761#
762# For a map of Indiana's time zone regions, see:
744# http://en.wikipedia.org/wiki/Time_in_Indiana
763# https://en.wikipedia.org/wiki/Time_in_Indiana
745#
746# From Paul Eggert (2007-08-17):
747# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
748# with the following exceptions:
749#
750# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
751# Vanderburgh, and Warrick counties have been like America/Chicago.
752#

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963# After prolonged debate, and despite continuing deep differences of opinion,
964# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
965# (-0500) time. They won't "fall back" this year. See Sara Shipley,
966# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
967#
968# From Paul Eggert (2001-07-16):
969# The final rule was published in the
970# Federal Register 65, 160 (2000-08-17), pp 50154-50158.
764#
765# From Paul Eggert (2007-08-17):
766# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
767# with the following exceptions:
768#
769# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
770# Vanderburgh, and Warrick counties have been like America/Chicago.
771#

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982# After prolonged debate, and despite continuing deep differences of opinion,
983# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
984# (-0500) time. They won't "fall back" this year. See Sara Shipley,
985# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
986#
987# From Paul Eggert (2001-07-16):
988# The final rule was published in the
989# Federal Register 65, 160 (2000-08-17), pp 50154-50158.
971# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22
990# https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm
972#
973Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36
974 -6:00 US C%sT 1946
975 -6:00 - CST 1968
976 -6:00 US C%sT 2000 Oct 29 2:00
977 -5:00 US E%sT
978
979

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989# From Paul Eggert (2001-07-17):
990# We don't know where the line used to be within Kearny County, KS,
991# so omit that change for now.
992# See America/Indiana/Knox for the Starke County, IN change.
993# See America/North_Dakota/Center for the Oliver County, ND change.
994# West Wendover, NV officially switched from Pacific to mountain time on
995# 1999-10-31. See the
996# Federal Register 64, 203 (1999-10-21), pp 56705-56707.
991#
992Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36
993 -6:00 US C%sT 1946
994 -6:00 - CST 1968
995 -6:00 US C%sT 2000 Oct 29 2:00
996 -5:00 US E%sT
997
998

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1008# From Paul Eggert (2001-07-17):
1009# We don't know where the line used to be within Kearny County, KS,
1010# so omit that change for now.
1011# See America/Indiana/Knox for the Starke County, IN change.
1012# See America/North_Dakota/Center for the Oliver County, ND change.
1013# West Wendover, NV officially switched from Pacific to mountain time on
1014# 1999-10-31. See the
1015# Federal Register 64, 203 (1999-10-21), pp 56705-56707.
997# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15
1016# https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm
998# However, the Federal Register says that West Wendover already operated
999# on mountain time, and the rule merely made this official;
1000# hence a separate tz entry is not needed.
1001
1002# Michigan
1003#
1004# From Bob Devine (1988-01-28):
1005# Michigan didn't observe DST from 1968 to 1973.

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1019#
1020# This story is too entertaining to be false, so go with Howse over Shanks.
1021#
1022# From Paul Eggert (2001-03-06):
1023# Garland (1927) writes "Cleveland and Detroit advanced their clocks
1024# one hour in 1914." This change is not in Shanks. We have no more
1025# info, so omit this for now.
1026#
1017# However, the Federal Register says that West Wendover already operated
1018# on mountain time, and the rule merely made this official;
1019# hence a separate tz entry is not needed.
1020
1021# Michigan
1022#
1023# From Bob Devine (1988-01-28):
1024# Michigan didn't observe DST from 1968 to 1973.

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1038#
1039# This story is too entertaining to be false, so go with Howse over Shanks.
1040#
1041# From Paul Eggert (2001-03-06):
1042# Garland (1927) writes "Cleveland and Detroit advanced their clocks
1043# one hour in 1914." This change is not in Shanks. We have no more
1044# info, so omit this for now.
1045#
1046# From Paul Eggert (2017-07-26):
1047# Although Shanks says Detroit observed DST in 1967 from 06-14 00:01
1048# until 10-29 00:01, I now see multiple reports that this is incorrect.
1049# For example, according to a 50-year anniversary report about the 1967
1050# Detroit riots and a major-league doubleheader on 1967-07-23, "By the time
1051# the last fly ball of the doubleheader settled into the glove of leftfielder
1052# Lenny Green, it was after 7 p.m. Detroit did not observe daylight saving
1053# time, so light was already starting to fail. Twilight was made even deeper
1054# by billowing columns of smoke that ascended in an unbroken wall north of the
1055# ballpark." See: Dow B. Detroit '67: As violence unfolded, Tigers played two
1056# at home vs. Yankees. Detroit Free Press 2017-07-23.
1057# https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/
1058#
1027# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
1028# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1029Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
1030Rule Detroit 1948 only - Sep lastSun 2:00 0 S
1059# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
1060# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
1061Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
1062Rule Detroit 1948 only - Sep lastSun 2:00 0 S
1031Rule Detroit 1967 only - Jun 14 2:00 1:00 D
1032Rule Detroit 1967 only - Oct lastSun 2:00 0 S
1033# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1034Zone America/Detroit -5:32:11 - LMT 1905
1035 -6:00 - CST 1915 May 15 2:00
1036 -5:00 - EST 1942
1037 -5:00 US E%sT 1946
1038 -5:00 Detroit E%sT 1973
1039 -5:00 US E%sT 1975
1040 -5:00 - EST 1975 Apr 27 2:00

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1063# currently uninhabited
1064# see Mark Fineman, "An Isle Rich in Guano and Discord",
1065# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1066# Jimmy Skaggs, _The Great Guano Rush_ (1994).
1067
1068################################################################################
1069
1070
1063# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1064Zone America/Detroit -5:32:11 - LMT 1905
1065 -6:00 - CST 1915 May 15 2:00
1066 -5:00 - EST 1942
1067 -5:00 US E%sT 1946
1068 -5:00 Detroit E%sT 1973
1069 -5:00 US E%sT 1975
1070 -5:00 - EST 1975 Apr 27 2:00

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1093# currently uninhabited
1094# see Mark Fineman, "An Isle Rich in Guano and Discord",
1095# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1096# Jimmy Skaggs, _The Great Guano Rush_ (1994).
1097
1098################################################################################
1099
1100
1071# From Paul Eggert (2014-10-31):
1101# From Paul Eggert (2017-02-10):
1072#
1073# Unless otherwise specified, the source for data through 1990 is:
1074# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
1075# San Diego: ACS Publications, Inc. (2003).
1076# Unfortunately this book contains many errors and cites no sources.
1077#
1102#
1103# Unless otherwise specified, the source for data through 1990 is:
1104# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
1105# San Diego: ACS Publications, Inc. (2003).
1106# Unfortunately this book contains many errors and cites no sources.
1107#
1078# Gwillim Law writes that a good source
1079# for recent time zone data is the International Air Transport
1108# Many years ago Gwillim Law wrote that a good source
1109# for time zone data was the International Air Transport
1080# Association's Standard Schedules Information Manual (IATA SSIM),
1081# published semiannually. Law sent in several helpful summaries
1082# of the IATA's data after 1990. Except where otherwise noted,
1083# IATA SSIM is the source for entries after 1990.
1084#
1085# Other sources occasionally used include:
1086#
1087# Edward W. Whitman, World Time Differences,
1088# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
1089# which I found in the UCLA library.
1090#
1091# William Willett, The Waste of Daylight, 19th edition
1092# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
1093# [PDF] (1914-03)
1094#
1095# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1110# Association's Standard Schedules Information Manual (IATA SSIM),
1111# published semiannually. Law sent in several helpful summaries
1112# of the IATA's data after 1990. Except where otherwise noted,
1113# IATA SSIM is the source for entries after 1990.
1114#
1115# Other sources occasionally used include:
1116#
1117# Edward W. Whitman, World Time Differences,
1118# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
1119# which I found in the UCLA library.
1120#
1121# William Willett, The Waste of Daylight, 19th edition
1122# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
1123# [PDF] (1914-03)
1124#
1125# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1096# .
1126# <https://www.jstor.org/stable/1774359>.
1097#
1098# See the 'europe' file for Greenland.
1099
1100# Canada
1101
1102# From Alain LaBont�� (1994-11-14):
1103# I post here the time zone abbreviations standardized in Canada
1104# for both English and French in the CAN/CSA-Z234.4-89 standard....

--- 29 unchanged lines hidden (view full) ---

1134# Unless otherwise specified, the data entries for Canada are all from Shanks
1135# & Pottenger.
1136
1137# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1138# 2007-03-01):
1139# The British Columbia government announced yesterday that it will
1140# adjust daylight savings next year to align with changes in the
1141# U.S. and the rest of Canada....
1127#
1128# See the 'europe' file for Greenland.
1129
1130# Canada
1131
1132# From Alain LaBont�� (1994-11-14):
1133# I post here the time zone abbreviations standardized in Canada
1134# for both English and French in the CAN/CSA-Z234.4-89 standard....

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1164# Unless otherwise specified, the data entries for Canada are all from Shanks
1165# & Pottenger.
1166
1167# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1168# 2007-03-01):
1169# The British Columbia government announced yesterday that it will
1170# adjust daylight savings next year to align with changes in the
1171# U.S. and the rest of Canada....
1142# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
1172# https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm
1143# ...
1144# Nova Scotia
1145# Daylight saving time will be extended by four weeks starting in 2007....
1173# ...
1174# Nova Scotia
1175# Daylight saving time will be extended by four weeks starting in 2007....
1146# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf
1176# https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf
1147#
1148# [For New Brunswick] the new legislation dictates that the time change is to
1149# be done at 02:00 instead of 00:01.
1177#
1178# [For New Brunswick] the new legislation dictates that the time change is to
1179# be done at 02:00 instead of 00:01.
1150# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
1180# https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
1151# ...
1152# Manitoba has traditionally changed the clock every fall at 03:00.
1153# As of 2006, the transition is to take place one hour earlier at 02:00.
1181# ...
1182# Manitoba has traditionally changed the clock every fall at 03:00.
1183# As of 2006, the transition is to take place one hour earlier at 02:00.
1154# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
1184# https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
1155# ...
1156# [Alberta, Ontario, Quebec] will follow US rules.
1157# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
1158# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
1159# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
1160# ...
1161# P.E.I. will follow US rules....
1162# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1163# ...
1164# Province of Newfoundland and Labrador....
1165# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
1166# ...
1167# Yukon
1185# ...
1186# [Alberta, Ontario, Quebec] will follow US rules.
1187# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
1188# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
1189# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
1190# ...
1191# P.E.I. will follow US rules....
1192# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1193# ...
1194# Province of Newfoundland and Labrador....
1195# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
1196# ...
1197# Yukon
1168# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
1198# https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
1169# ...
1170# N.W.T. will follow US rules. Whoever maintains the government web site
1171# does not seem to believe in bookmarks. To see the news release, click the
1172# following link and search for "Daylight Savings Time Change". Press the
1173# "Daylight Savings Time Change" link; it will fire off a popup using
1174# JavaScript.
1175# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1176# ...

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1181# From Paul Eggert (2014-10-18):
1182# H. David Matthews and Mary Vincent's map
1183# "It's about TIME", _Canadian Geographic_ (September-October 1998)
1184# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp
1185# contains detailed boundaries for regions observing nonstandard
1186# time and daylight saving time arrangements in Canada circa 1998.
1187#
1188# National Research Council Canada maintains info about time zones and DST.
1199# ...
1200# N.W.T. will follow US rules. Whoever maintains the government web site
1201# does not seem to believe in bookmarks. To see the news release, click the
1202# following link and search for "Daylight Savings Time Change". Press the
1203# "Daylight Savings Time Change" link; it will fire off a popup using
1204# JavaScript.
1205# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1206# ...

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1211# From Paul Eggert (2014-10-18):
1212# H. David Matthews and Mary Vincent's map
1213# "It's about TIME", _Canadian Geographic_ (September-October 1998)
1214# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp
1215# contains detailed boundaries for regions observing nonstandard
1216# time and daylight saving time arrangements in Canada circa 1998.
1217#
1218# National Research Council Canada maintains info about time zones and DST.
1189# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
1190# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
1219# https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
1220# https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
1191# Its unofficial information is often taken from Matthews and Vincent.
1192
1193# From Paul Eggert (2006-06-27):
1194# For now, assume all of DST-observing Canada will fall into line with the
1195# new US DST rules,
1196
1197# From Chris Walton (2011-12-01)
1198# In the first of Tammy Hardwick's articles

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1219Rule Canada 1974 2006 - Oct lastSun 2:00 0 S
1220Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D
1221Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D
1222Rule Canada 2007 max - Nov Sun>=1 2:00 0 S
1223
1224
1225# Newfoundland and Labrador
1226
1221# Its unofficial information is often taken from Matthews and Vincent.
1222
1223# From Paul Eggert (2006-06-27):
1224# For now, assume all of DST-observing Canada will fall into line with the
1225# new US DST rules,
1226
1227# From Chris Walton (2011-12-01)
1228# In the first of Tammy Hardwick's articles

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1249Rule Canada 1974 2006 - Oct lastSun 2:00 0 S
1250Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D
1251Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D
1252Rule Canada 2007 max - Nov Sun>=1 2:00 0 S
1253
1254
1255# Newfoundland and Labrador
1256
1227# From Paul Eggert (2000-10-02):
1228# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
1229# but the only part of Labrador that follows the rules is the
1230# southeast corner, including Port Hope Simpson and Mary's Harbour,
1231# but excluding, say, Black Tickle.
1257# From Paul Eggert (2017-10-14):
1258# Legally Labrador should observe Newfoundland time; see:
1259# McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07
1260# http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/
1261# Matthews and Vincent (1998) write that the only part of Labrador
1262# that follows the rules is the southeast corner, including Port Hope
1263# Simpson and Mary's Harbour, but excluding, say, Black Tickle.
1232
1233# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1234Rule StJohns 1917 only - Apr 8 2:00 1:00 D
1235Rule StJohns 1917 only - Sep 17 2:00 0 S
1236# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
1237Rule StJohns 1919 only - May 5 23:00 1:00 D
1238Rule StJohns 1919 only - Aug 12 23:00 0 S
1239# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.

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1423# Matthews and Vincent (1998) also write that Quebec east of the -63
1424# meridian is supposed to observe AST, but residents as far east as
1425# Natashquan use EST/EDT, and residents east of Natashquan use AST.
1426# The Quebec department of justice writes in
1427# "The situation in Minganie and Basse-C��te-Nord"
1428# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1429# that the coastal strip from just east of Natashquan to Blanc-Sablon
1430# observes Atlantic standard time all year round.
1264
1265# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1266Rule StJohns 1917 only - Apr 8 2:00 1:00 D
1267Rule StJohns 1917 only - Sep 17 2:00 0 S
1268# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
1269Rule StJohns 1919 only - May 5 23:00 1:00 D
1270Rule StJohns 1919 only - Aug 12 23:00 0 S
1271# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.

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1455# Matthews and Vincent (1998) also write that Quebec east of the -63
1456# meridian is supposed to observe AST, but residents as far east as
1457# Natashquan use EST/EDT, and residents east of Natashquan use AST.
1458# The Quebec department of justice writes in
1459# "The situation in Minganie and Basse-C��te-Nord"
1460# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1461# that the coastal strip from just east of Natashquan to Blanc-Sablon
1462# observes Atlantic standard time all year round.
1431# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1463# https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1432# says this common practice was codified into law as of 2007.
1433# For lack of better info, guess this practice began around 1970, contra to
1434# Shanks & Pottenger who have this region observing AST/ADT.
1435
1436# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1437Zone America/Blanc-Sablon -3:48:28 - LMT 1884
1438 -4:00 Canada A%sT 1970
1439 -4:00 - AST

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1455# have already done so. In Orillia DST was to run until Saturday,
1456# 1912-08-31 (no time mentioned), but it was met with considerable
1457# hostility from certain segments of the public, and was revoked after
1458# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1459# presumably that should be -07-06. (1912-06-19, -07-12; also letters
1460# earlier in June).
1461#
1462# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1464# says this common practice was codified into law as of 2007.
1465# For lack of better info, guess this practice began around 1970, contra to
1466# Shanks & Pottenger who have this region observing AST/ADT.
1467
1468# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1469Zone America/Blanc-Sablon -3:48:28 - LMT 1884
1470 -4:00 Canada A%sT 1970
1471 -4:00 - AST

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1487# have already done so. In Orillia DST was to run until Saturday,
1488# 1912-08-31 (no time mentioned), but it was met with considerable
1489# hostility from certain segments of the public, and was revoked after
1490# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1491# presumably that should be -07-06. (1912-06-19, -07-12; also letters
1492# earlier in June).
1493#
1494# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1495#
1496# From Paul Eggert (2017-07-08):
1497# For more on Orillia, see: Daubs K. Bold attempt at daylight saving
1498# time became a comic failure in Orillia. Toronto Star 2017-07-08.
1499# https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html
1463
1464# From Paul Eggert (1997-10-17):
1465# Mark Brader writes that an article in the 1997-10-14 Toronto Star
1466# says that Atikokan, Ontario currently does not observe DST,
1467# but will vote on 11-10 whether to use EST/EDT.
1468# He also writes that the Ontario Time Act (1990, Chapter T.9)
1469# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html
1470# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.

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1946# Northwest Territories, Nunavut, Yukon
1947
1948# From Paul Eggert (2006-03-22):
1949# Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
1950# Mathew Englander (1996-10-07) gives the following refs:
1951# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1952# c. 7 defines Yukon standard time as UTC-9....
1953# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1500
1501# From Paul Eggert (1997-10-17):
1502# Mark Brader writes that an article in the 1997-10-14 Toronto Star
1503# says that Atikokan, Ontario currently does not observe DST,
1504# but will vote on 11-10 whether to use EST/EDT.
1505# He also writes that the Ontario Time Act (1990, Chapter T.9)
1506# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html
1507# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.

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1983# Northwest Territories, Nunavut, Yukon
1984
1985# From Paul Eggert (2006-03-22):
1986# Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
1987# Mathew Englander (1996-10-07) gives the following refs:
1988# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1989# c. 7 defines Yukon standard time as UTC-9....
1990# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1954# [http://canlii.ca/t/7vhg]
1991# [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html]
1955# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1956# * O.I.C. 1980/02 established DST.
1957# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1958
1959# From Brian Inglis (2015-04-14):
1960#
1961# I tried to trace the history of Yukon time and found the following
1962# regulations, giving the reference title and URL if found, regulation name,

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2011# is to say, eight hours behind Greenwich Time in the area of the Yukon
2012# Territory lying east of the 138th degree longitude west.
2013#
2014# 3. In the remainder of the Territory, lying west of the 138th degree
2015# longitude west, Yukon (West) Standard Time shall be reckoned as nine
2016# hours behind Greenwich Time.
2017#
2018# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
1992# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1993# * O.I.C. 1980/02 established DST.
1994# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1995
1996# From Brian Inglis (2015-04-14):
1997#
1998# I tried to trace the history of Yukon time and found the following
1999# regulations, giving the reference title and URL if found, regulation name,

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2048# is to say, eight hours behind Greenwich Time in the area of the Yukon
2049# Territory lying east of the 138th degree longitude west.
2050#
2051# 3. In the remainder of the Territory, lying west of the 138th degree
2052# longitude west, Yukon (West) Standard Time shall be reckoned as nine
2053# hours behind Greenwich Time.
2054#
2055# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
2019# http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
2056# https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
2020# C.O. 1973/214 INTERPRETATION ACT ...
2021#
2022# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
2023# revoked.
2024#
2025# 2. Yukon Standard Time as defined by section 36 of the Interpretation
2026# Act from and after midnight on the twenty-eighth day of October, 1973
2027# shall be reckoned in the same manner as Pacific Standard Time, that is
2028# to say eight hours behind Greenwich Time.
2029#
2030# * O.I.C. 1980/02 INTERPRETATION ACT
2031# http://? - no online source found
2032#
2033# * Yukon Daylight Saving Time, YOIC 1987/56
2057# C.O. 1973/214 INTERPRETATION ACT ...
2058#
2059# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
2060# revoked.
2061#
2062# 2. Yukon Standard Time as defined by section 36 of the Interpretation
2063# Act from and after midnight on the twenty-eighth day of October, 1973
2064# shall be reckoned in the same manner as Pacific Standard Time, that is
2065# to say eight hours behind Greenwich Time.
2066#
2067# * O.I.C. 1980/02 INTERPRETATION ACT
2068# http://? - no online source found
2069#
2070# * Yukon Daylight Saving Time, YOIC 1987/56
2034# http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
2071# https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
2035# O.I.C. 1987/056 INTERPRETATION ACT ...
2036#
2037# In every year between
2038# (a) two o'clock in the morning in the first Sunday in April, and
2039# (b) two o'clock in the morning in the last Sunday in October,
2040# Standard Time shall be reckoned as seven hours behind Greenwich Time and
2041# called Yukon Daylight Saving Time.
2042# ...
2043# Dated ... 9th day of March, A.D., 1987.
2044#
2045# * Yukon Daylight Saving Time 2006, YOIC 2006/127
2072# O.I.C. 1987/056 INTERPRETATION ACT ...
2073#
2074# In every year between
2075# (a) two o'clock in the morning in the first Sunday in April, and
2076# (b) two o'clock in the morning in the last Sunday in October,
2077# Standard Time shall be reckoned as seven hours behind Greenwich Time and
2078# called Yukon Daylight Saving Time.
2079# ...
2080# Dated ... 9th day of March, A.D., 1987.
2081#
2082# * Yukon Daylight Saving Time 2006, YOIC 2006/127
2046# http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
2083# https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
2047# O.I.C. 2006/127 INTERPRETATION ACT ...
2048#
2049# 1. In Yukon each year the time for general purposes shall be 7 hours
2050# behind Greenwich mean time during the period commencing at two o'clock
2051# in the forenoon on the second Sunday of March and ending at two o'clock
2052# in the forenoon on the first Sunday of November and shall be called
2053# Yukon Daylight Saving Time.
2054#
2055# 2. Order-in-Council 1987/56 is revoked.
2056#
2057# 3. This order comes into force January 1, 2007.
2058#
2059# * Interpretation Act, RSY 2002, c 125
2084# O.I.C. 2006/127 INTERPRETATION ACT ...
2085#
2086# 1. In Yukon each year the time for general purposes shall be 7 hours
2087# behind Greenwich mean time during the period commencing at two o'clock
2088# in the forenoon on the second Sunday of March and ending at two o'clock
2089# in the forenoon on the first Sunday of November and shall be called
2090# Yukon Daylight Saving Time.
2091#
2092# 2. Order-in-Council 1987/56 is revoked.
2093#
2094# 3. This order comes into force January 1, 2007.
2095#
2096# * Interpretation Act, RSY 2002, c 125
2060# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
2097# https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
2061
2062# From Rives McDow (1999-09-04):
2063# Nunavut ... moved ... to incorporate the whole territory into one time zone.
2064# Nunavut moves to single time zone Oct. 31
2065# http://www.nunatsiaq.com/nunavut/nvt90903_13.html
2066#
2067# From Antoine Leca (1999-09-06):
2068# We then need to create a new timezone for the Kitikmeot region of Nunavut

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2095# They plan to celebrate New Year's turn-over twice, one hour apart,
2096# so it appears that the situation will last at least that long.
2097# The Nunavut Intergovernmental Affairs hopes that they will "come to
2098# their senses", but the locals evidently don't see any problem with
2099# the current state of affairs.
2100
2101# From Michaela Rodrigue, writing in the
2102# Nunatsiaq News (1999-11-19):
2098
2099# From Rives McDow (1999-09-04):
2100# Nunavut ... moved ... to incorporate the whole territory into one time zone.
2101# Nunavut moves to single time zone Oct. 31
2102# http://www.nunatsiaq.com/nunavut/nvt90903_13.html
2103#
2104# From Antoine Leca (1999-09-06):
2105# We then need to create a new timezone for the Kitikmeot region of Nunavut

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2132# They plan to celebrate New Year's turn-over twice, one hour apart,
2133# so it appears that the situation will last at least that long.
2134# The Nunavut Intergovernmental Affairs hopes that they will "come to
2135# their senses", but the locals evidently don't see any problem with
2136# the current state of affairs.
2137
2138# From Michaela Rodrigue, writing in the
2139# Nunatsiaq News (1999-11-19):
2103# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html
2140# http://www.nunatsiaqonline.ca/archives/nunavut991130/nvt91119_17.html
2104# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
2105# central - or Nunavut time - for government offices, and eastern time
2106# for municipal offices and schools.... Igloolik [was similar but then]
2107# made the switch to central time on Saturday, Nov. 6.
2108
2109# From Paul Eggert (2000-10-02):
2110# Matthews and Vincent (1998) say the following, but we lack histories
2111# for these potential new Zones.
2112#
2113# The Canadian Forces station at Alert uses Eastern Time while the
2114# handful of residents at the Eureka weather station [in the Central
2115# zone] skip daylight savings. Baffin Island, which is crossed by the
2116# Central, Eastern and Atlantic Time zones only uses Eastern Time.
2117# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
2118# Central Time and Southampton Island [in the Central zone] is not
2119# required to use daylight savings.
2120
2141# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
2142# central - or Nunavut time - for government offices, and eastern time
2143# for municipal offices and schools.... Igloolik [was similar but then]
2144# made the switch to central time on Saturday, Nov. 6.
2145
2146# From Paul Eggert (2000-10-02):
2147# Matthews and Vincent (1998) say the following, but we lack histories
2148# for these potential new Zones.
2149#
2150# The Canadian Forces station at Alert uses Eastern Time while the
2151# handful of residents at the Eureka weather station [in the Central
2152# zone] skip daylight savings. Baffin Island, which is crossed by the
2153# Central, Eastern and Atlantic Time zones only uses Eastern Time.
2154# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
2155# Central Time and Southampton Island [in the Central zone] is not
2156# required to use daylight savings.
2157
2121# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html>
2158# From <http://www.nunatsiaqonline.ca/archives/nunavut001130/nvt21110_02.html>
2122# Nunavut now has two time zones (2000-11-10):
2123# The Nunavut government would allow its employees in Kugluktuk and
2124# Cambridge Bay to operate on central time year-round, putting them
2125# one hour behind the rest of Nunavut for six months during the winter.
2126# At the end of October the two communities had rebelled against
2127# Nunavut's unified time zone, refusing to shift to eastern time with
2128# the rest of the territory for the winter. Cambridge Bay remained on
2129# central time, while Kugluktuk, even farther west, reverted to

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2444# Could not find the new law text, but the proposed law text changes are here:
2445# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2446# (Gaceta Parlamentaria)
2447#
2448# There is also a list of the votes here:
2449# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2450#
2451# Our page:
2159# Nunavut now has two time zones (2000-11-10):
2160# The Nunavut government would allow its employees in Kugluktuk and
2161# Cambridge Bay to operate on central time year-round, putting them
2162# one hour behind the rest of Nunavut for six months during the winter.
2163# At the end of October the two communities had rebelled against
2164# Nunavut's unified time zone, refusing to shift to eastern time with
2165# the rest of the territory for the winter. Cambridge Bay remained on
2166# central time, while Kugluktuk, even farther west, reverted to

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2481# Could not find the new law text, but the proposed law text changes are here:
2482# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2483# (Gaceta Parlamentaria)
2484#
2485# There is also a list of the votes here:
2486# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2487#
2488# Our page:
2452# http://www.timeanddate.com/news/time/north-mexico-dst-change.html
2489# https://www.timeanddate.com/news/time/north-mexico-dst-change.html
2453
2454# From Arthur David Olson (2010-01-20):
2455# The page
2456# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2457# includes this text:
2458# En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2459# Ju��rez y Ojinaga en Chihuahua; Acu��a y Piedras Negras en Coahuila;
2460# An��huac en Nuevo Le��n; y Nuevo Laredo, Reynosa y Matamoros en

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2729# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2730Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown
2731 -3:58:29 - BMT 1932 # Bridgetown Mean Time
2732 -4:00 Barb A%sT
2733
2734# Belize
2735# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2736# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2490
2491# From Arthur David Olson (2010-01-20):
2492# The page
2493# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2494# includes this text:
2495# En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2496# Ju��rez y Ojinaga en Chihuahua; Acu��a y Piedras Negras en Coahuila;
2497# An��huac en Nuevo Le��n; y Nuevo Laredo, Reynosa y Matamoros en

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2766# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2767Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown
2768 -3:58:29 - BMT 1932 # Bridgetown Mean Time
2769 -4:00 Barb A%sT
2770
2771# Belize
2772# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2773# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2737Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
2738Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
2739Rule Belize 1973 only - Dec 5 0:00 1:00 D
2740Rule Belize 1974 only - Feb 9 0:00 0 S
2741Rule Belize 1982 only - Dec 18 0:00 1:00 D
2742Rule Belize 1983 only - Feb 12 0:00 0 S
2774Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530
2775Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST
2776Rule Belize 1973 only - Dec 5 0:00 1:00 CDT
2777Rule Belize 1974 only - Feb 9 0:00 0 CST
2778Rule Belize 1982 only - Dec 18 0:00 1:00 CDT
2779Rule Belize 1983 only - Feb 12 0:00 0 CST
2743# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2744Zone America/Belize -5:52:48 - LMT 1912 Apr
2780# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2781Zone America/Belize -5:52:48 - LMT 1912 Apr
2745 -6:00 Belize C%sT
2782 -6:00 Belize %s
2746
2747# Bermuda
2748
2749# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2750# Bermuda dockyard, Ireland I; round that.
2751
2752# From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2753

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2863# indicating that Cuba is still on standard time.
2864
2865# From Steffen Thorsen (2008-03-12):
2866# It seems that Cuba will start DST on Sunday, 2007-03-16...
2867# It was announced yesterday, according to this source (in Spanish):
2868# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2869#
2870# Some more background information is posted here:
2783
2784# Bermuda
2785
2786# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2787# Bermuda dockyard, Ireland I; round that.
2788
2789# From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2790

--- 109 unchanged lines hidden (view full) ---

2900# indicating that Cuba is still on standard time.
2901
2902# From Steffen Thorsen (2008-03-12):
2903# It seems that Cuba will start DST on Sunday, 2007-03-16...
2904# It was announced yesterday, according to this source (in Spanish):
2905# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2906#
2907# Some more background information is posted here:
2871# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2908# https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2872#
2873# The article also says that Cuba has been observing DST since 1963,
2874# while Shanks (and tzdata) has 1965 as the first date (except in the
2875# 1940's). Many other web pages in Cuba also claim that it has been
2876# observed since 1963, but with the exception of 1970 - an exception
2877# which is not present in tzdata/Shanks. So there is a chance we need to
2878# change some historic records as well.
2879#

--- 30 unchanged lines hidden (view full) ---

2910# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
2911# this year. Nothing about the end date known so far (if that has
2912# changed at all).
2913#
2914# Source:
2915# http://granma.co.cu/2011/03/08/nacional/artic01.html
2916#
2917# Our info:
2909#
2910# The article also says that Cuba has been observing DST since 1963,
2911# while Shanks (and tzdata) has 1965 as the first date (except in the
2912# 1940's). Many other web pages in Cuba also claim that it has been
2913# observed since 1963, but with the exception of 1970 - an exception
2914# which is not present in tzdata/Shanks. So there is a chance we need to
2915# change some historic records as well.
2916#

--- 30 unchanged lines hidden (view full) ---

2947# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
2948# this year. Nothing about the end date known so far (if that has
2949# changed at all).
2950#
2951# Source:
2952# http://granma.co.cu/2011/03/08/nacional/artic01.html
2953#
2954# Our info:
2918# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
2955# https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
2919#
2920# From Steffen Thorsen (2011-10-30)
2921# Cuba will end DST two weeks later this year. Instead of going back
2922# tonight, it has been delayed to 2011-11-13 at 01:00.
2923#
2924# One source (Spanish)
2925# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
2926#
2927# Our page:
2956#
2957# From Steffen Thorsen (2011-10-30)
2958# Cuba will end DST two weeks later this year. Instead of going back
2959# tonight, it has been delayed to 2011-11-13 at 01:00.
2960#
2961# One source (Spanish)
2962# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
2963#
2964# Our page:
2928# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html
2965# https://www.timeanddate.com/news/time/cuba-time-changes-2011.html
2929#
2930# From Steffen Thorsen (2012-03-01)
2931# According to Radio Reloj, Cuba will start DST on Midnight between March
2932# 31 and April 1.
2933#
2934# Radio Reloj has the following info (Spanish):
2935# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
2936#
2937# Our info on it:
2966#
2967# From Steffen Thorsen (2012-03-01)
2968# According to Radio Reloj, Cuba will start DST on Midnight between March
2969# 31 and April 1.
2970#
2971# Radio Reloj has the following info (Spanish):
2972# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
2973#
2974# Our info on it:
2938# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
2975# https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
2939
2940# From Steffen Thorsen (2012-11-03):
2941# Radio Reloj and many other sources report that Cuba is changing back
2942# to standard time on 2012-11-04:
2943# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
2944# From Paul Eggert (2012-11-03):
2945# For now, assume the future rule is first Sunday in November.
2946

--- 62 unchanged lines hidden (view full) ---

3009# Dominican Republic will be reverting to 8 hours from the International Date
3010# Line, and will not be using DST in the foreseeable future. The reason they
3011# decided to use DST was to be in synch with Puerto Rico, who was also going
3012# to implement DST. When Puerto Rico didn't implement DST, the president
3013# decided to revert.
3014
3015
3016# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2976
2977# From Steffen Thorsen (2012-11-03):
2978# Radio Reloj and many other sources report that Cuba is changing back
2979# to standard time on 2012-11-04:
2980# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
2981# From Paul Eggert (2012-11-03):
2982# For now, assume the future rule is first Sunday in November.
2983

--- 62 unchanged lines hidden (view full) ---

3046# Dominican Republic will be reverting to 8 hours from the International Date
3047# Line, and will not be using DST in the foreseeable future. The reason they
3048# decided to use DST was to be in synch with Puerto Rico, who was also going
3049# to implement DST. When Puerto Rico didn't implement DST, the president
3050# decided to revert.
3051
3052
3053# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3017Rule DR 1966 only - Oct 30 0:00 1:00 D
3018Rule DR 1967 only - Feb 28 0:00 0 S
3019Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD
3020Rule DR 1970 only - Feb 21 0:00 0 S
3021Rule DR 1971 only - Jan 20 0:00 0 S
3022Rule DR 1972 1974 - Jan 21 0:00 0 S
3054Rule DR 1966 only - Oct 30 0:00 1:00 EDT
3055Rule DR 1967 only - Feb 28 0:00 0 EST
3056Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430
3057Rule DR 1970 only - Feb 21 0:00 0 EST
3058Rule DR 1971 only - Jan 20 0:00 0 EST
3059Rule DR 1972 1974 - Jan 21 0:00 0 EST
3023# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3024Zone America/Santo_Domingo -4:39:36 - LMT 1890
3025 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
3060# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3061Zone America/Santo_Domingo -4:39:36 - LMT 1890
3062 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
3026 -5:00 DR E%sT 1974 Oct 27
3063 -5:00 DR %s 1974 Oct 27
3027 -4:00 - AST 2000 Oct 29 2:00
3028 -5:00 US E%sT 2000 Dec 3 1:00
3029 -4:00 - AST
3030
3031# El Salvador
3032
3033# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3034Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D

--- 90 unchanged lines hidden (view full) ---

3125# are going to observe DST every year now...
3126#
3127# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
3128# http://www.canalplushaiti.net/?p=6714
3129
3130# From Steffen Thorsen (2016-03-12):
3131# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti
3132# are not going on DST this year. Several other resources confirm this: ...
3064 -4:00 - AST 2000 Oct 29 2:00
3065 -5:00 US E%sT 2000 Dec 3 1:00
3066 -4:00 - AST
3067
3068# El Salvador
3069
3070# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3071Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D

--- 90 unchanged lines hidden (view full) ---

3162# are going to observe DST every year now...
3163#
3164# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
3165# http://www.canalplushaiti.net/?p=6714
3166
3167# From Steffen Thorsen (2016-03-12):
3168# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti
3169# are not going on DST this year. Several other resources confirm this: ...
3133# http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html
3134# http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/
3170# https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html
3171# https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/
3135# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/
3136
3172# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/
3173
3174# From Steffen Thorsen (2017-03-12):
3175# We have received 4 mails from different people telling that Haiti
3176# has started DST again today, and this source seems to confirm that,
3177# I have not been able to find a more authoritative source:
3178# https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html
3179
3137# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3138Rule Haiti 1983 only - May 8 0:00 1:00 D
3139Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
3140Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
3141# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3142# Go with IATA.
3143Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
3144Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
3145Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
3146Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
3147Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D
3148Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S
3180# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
3181Rule Haiti 1983 only - May 8 0:00 1:00 D
3182Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
3183Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
3184# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3185# Go with IATA.
3186Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
3187Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
3188Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
3189Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
3190Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D
3191Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S
3192Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D
3193Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S
3149# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3150Zone America/Port-au-Prince -4:49:20 - LMT 1890
3151 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
3152 -5:00 Haiti E%sT
3153
3154# Honduras
3155# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3156

--- 151 unchanged lines hidden (view full) ---

3308# St Lucia
3309# See America/Port_of_Spain.
3310
3311# St Pierre and Miquelon
3312# There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3313# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3314Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
3315 -4:00 - AST 1980 May
3194# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3195Zone America/Port-au-Prince -4:49:20 - LMT 1890
3196 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
3197 -5:00 Haiti E%sT
3198
3199# Honduras
3200# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3201

--- 151 unchanged lines hidden (view full) ---

3353# St Lucia
3354# See America/Port_of_Spain.
3355
3356# St Pierre and Miquelon
3357# There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3358# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3359Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
3360 -4:00 - AST 1980 May
3316 -3:00 - PMST 1987 # Pierre & Miquelon Time
3317 -3:00 Canada PM%sT
3361 -3:00 - -03 1987
3362 -3:00 Canada -03/-02
3318
3319# St Vincent and the Grenadines
3320# See America/Port_of_Spain.
3321
3322# Turks and Caicos
3323#
3324# From Chris Dunn in
3363
3364# St Vincent and the Grenadines
3365# See America/Port_of_Spain.
3366
3367# Turks and Caicos
3368#
3369# From Chris Dunn in
3325# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007
3370# https://bugs.debian.org/415007
3326# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3327# daylight saving dates for time changes have been adjusted to match
3328# the recent U.S. change of dates.
3329#
3330# From Brian Inglis (2007-04-28):
3331# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3332# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3333# rows before that there is an out of date entry for Oct:

--- 5 unchanged lines hidden (view full) ---

3339# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See:
3340# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3341# Model this as a switch from EST/EDT to AST ...
3342# From Chris Walton (2014-11-04):
3343# ... the TCI government appears to have delayed the switch to
3344# "permanent daylight saving time" by one year....
3345# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3346#
3371# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3372# daylight saving dates for time changes have been adjusted to match
3373# the recent U.S. change of dates.
3374#
3375# From Brian Inglis (2007-04-28):
3376# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3377# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3378# rows before that there is an out of date entry for Oct:

--- 5 unchanged lines hidden (view full) ---

3384# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See:
3385# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3386# Model this as a switch from EST/EDT to AST ...
3387# From Chris Walton (2014-11-04):
3388# ... the TCI government appears to have delayed the switch to
3389# "permanent daylight saving time" by one year....
3390# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3391#
3392# From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen:
3393# ... agreed to the reintroduction in TCI of Daylight Saving Time (DST)
3394# during the summer months and Standard Time, also known as Local
3395# Time, during the winter months with effect from April 2018 ...
3396# https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3
3397#
3398# From Paul Eggert (2017-08-26):
3399# The date of effect of the spring 2018 change appears to be March 11,
3400# which makes more sense. See: Hamilton D. Time change back
3401# by March 2018 for TCI. Magnetic Media. 2017-08-25.
3402# http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/
3403#
3347# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3348Zone America/Grand_Turk -4:44:32 - LMT 1890
3349 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3350 -5:00 - EST 1979
3351 -5:00 US E%sT 2015 Nov Sun>=1 2:00
3404# Zone NAME GMTOFF RULES FORMAT [UNTIL]
3405Zone America/Grand_Turk -4:44:32 - LMT 1890
3406 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3407 -5:00 - EST 1979
3408 -5:00 US E%sT 2015 Nov Sun>=1 2:00
3352 -4:00 - AST
3409 -4:00 - AST 2018 Mar 11 3:00
3410 -5:00 US E%sT
3353
3354# British Virgin Is
3355# Virgin Is
3356# See America/Port_of_Spain.
3357
3358
3359# Local Variables:
3360# coding: utf-8
3361# End:
3411
3412# British Virgin Is
3413# Virgin Is
3414# See America/Port_of_Spain.
3415
3416
3417# Local Variables:
3418# coding: utf-8
3419# End: