northamerica revision 11828:3a60fce622dd
1# 2# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3# 4# This code is free software; you can redistribute it and/or modify it 5# under the terms of the GNU General Public License version 2 only, as 6# published by the Free Software Foundation. Oracle designates this 7# particular file as subject to the "Classpath" exception as provided 8# by Oracle in the LICENSE file that accompanied this code. 9# 10# This code is distributed in the hope that it will be useful, but WITHOUT 11# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13# version 2 for more details (a copy is included in the LICENSE file that 14# accompanied this code). 15# 16# You should have received a copy of the GNU General Public License version 17# 2 along with this work; if not, write to the Free Software Foundation, 18# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19# 20# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21# or visit www.oracle.com if you need additional information or have any 22# questions. 23# 24# This file is in the public domain, so clarified as of 25# 2009-05-17 by Arthur David Olson. 26 27# also includes Central America and the Caribbean 28 29# This file is by no means authoritative; if you think you know better, 30# go ahead and edit the file (and please send any changes to 31# tz@iana.org for general use in the future). For more, please see 32# the file CONTRIBUTING in the tz distribution. 33 34# From Paul Eggert (1999-03-22): 35# A reliable and entertaining source about time zones is 36# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 37 38############################################################################### 39 40# United States 41 42# From Paul Eggert (1999-03-31): 43# Howse writes (pp 121-125) that time zones were invented by 44# Professor Charles Ferdinand Dowd (1825-1904), 45# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 46# His pamphlet "A System of National Time for Railroads" (1870) 47# was the result of his proposals at the Convention of Railroad Trunk Lines 48# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 49# but in 1872-05 he moved the proposed origin to Greenwich. 50# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 51# and the most of the country soon followed suit. 52 53# From Paul Eggert (2005-04-16): 54# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 55# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 56 57# From Paul Eggert (2006-03-22): 58# A good source for time zone historical data in the US is 59# Thomas G. Shanks, The American Atlas (5th edition), 60# San Diego: ACS Publications, Inc. (1991). 61# Make sure you have the errata sheet; the book is somewhat useless without it. 62# It is the source for most of the pre-1991 US entries below. 63 64# From Paul Eggert (2001-03-06): 65# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 66# in his whimsical essay "An Economical Project for Diminishing the Cost 67# of Light" published in the Journal de Paris (1784-04-26). 68# Not everyone is happy with the results: 69# 70# I don't really care how time is reckoned so long as there is some 71# agreement about it, but I object to being told that I am saving 72# daylight when my reason tells me that I am doing nothing of the kind. 73# I even object to the implication that I am wasting something 74# valuable if I stay in bed after the sun has risen. As an admirer 75# of moonlight I resent the bossy insistence of those who want to 76# reduce my time for enjoying it. At the back of the Daylight Saving 77# scheme I detect the bony, blue-fingered hand of Puritanism, eager 78# to push people into bed earlier, and get them up earlier, to make 79# them healthy, wealthy and wise in spite of themselves. 80# 81# -- Robertson Davies, The diary of Samuel Marchbanks, 82# Clarke, Irwin (1947), XIX, Sunday 83# 84# For more about the first ten years of DST in the United States, see 85# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 86# (Carnegie Library of Pittsburgh, 1927). 87# http://www.clpgh.org/exhibit/dst.html 88# 89# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 90# However, DST was imposed by the Standard Time Act of 1918, which 91# was the first nationwide legal time standard, and apparently 92# time was just called "Standard Time" or "Daylight Saving Time". 93 94# From Arthur David Olson: 95# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 96# See, for example, the front page of the Saturday, 1974-10-26 97# and Sunday, 1974-10-27 editions of the Washington Post. 98 99# From Arthur David Olson: 100# Before the Uniform Time Act of 1966 took effect in 1967, observance of 101# Daylight Saving Time in the US was by local option, except during wartime. 102 103# From Arthur David Olson (2000-09-25): 104# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 105# In the introduction, Oboler spoke of "Eastern Peace Time." 106# An AltaVista search turned up: 107# http://rowayton.org/rhs/hstaug45.html 108# "When the time is announced over the radio now, it is 'Eastern Peace 109# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 110# (August 1945) by way of confirmation. 111 112# From Joseph Gallant citing 113# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 114# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 115# to switch to London for Attlee's address, but the American people 116# never got to hear his speech live. According to one press account, 117# CBS' Bob Trout was first to announce the word of Japan's surrender, 118# but a few seconds later, NBC, ABC and Mutual also flashed the word 119# of surrender, all of whom interrupting the bells of Big Ben in 120# London which were to precede Mr. Attlee's speech. 121 122# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 123# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 124# 125# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 126# Any announcement from Asia would reach St. John's New York newsroom on a 127# wire service teletype machine, which had prescribed signals for major news. 128# Associated Press, for example, would ring five bells before spewing out 129# typed copy of an important story, and 10 bells for news "of transcendental 130# importance." 131# 132# On Aug. 14, stalling while talking steadily into the NBC networks' open 133# microphone, St. John heard five bells and waited only to hear a sixth bell, 134# before announcing confidently: "Ladies and gentlemen, World War II is over. 135# The Japanese have agreed to our surrender terms." 136# 137# He had scored a 20-second scoop on other broadcasters. 138 139# From Arthur David Olson (2005-08-22): 140# Paul has been careful to use the "US" rules only in those locations 141# that are part of the United States; this reflects the real scope of 142# U.S. government action. So even though the "US" rules have changed 143# in the latest release, other countries won't be affected. 144 145# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 146Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 147Rule US 1918 1919 - Oct lastSun 2:00 0 S 148Rule US 1942 only - Feb 9 2:00 1:00 W # War 149Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 150Rule US 1945 only - Sep lastSun 2:00 0 S 151Rule US 1967 2006 - Oct lastSun 2:00 0 S 152Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 153Rule US 1974 only - Jan 6 2:00 1:00 D 154Rule US 1975 only - Feb 23 2:00 1:00 D 155Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 156Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 157Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 158Rule US 2007 max - Nov Sun>=1 2:00 0 S 159 160# From Arthur David Olson, 2005-12-19 161# We generate the files specified below to guard against old files with 162# obsolete information being left in the time zone binary directory. 163# We limit the list to names that have appeared in previous versions of 164# this time zone package. 165# We do these as separate Zones rather than as Links to avoid problems if 166# a particular place changes whether it observes DST. 167# We put these specifications here in the northamerica file both to 168# increase the chances that they'll actually get compiled and to 169# avoid the need to duplicate the US rules in another file. 170 171# Zone NAME GMTOFF RULES FORMAT [UNTIL] 172Zone EST -5:00 - EST 173Zone MST -7:00 - MST 174Zone HST -10:00 - HST 175Zone EST5EDT -5:00 US E%sT 176Zone CST6CDT -6:00 US C%sT 177Zone MST7MDT -7:00 US M%sT 178Zone PST8PDT -8:00 US P%sT 179 180# From Bob Devine (1988-01-28): 181# ...Alaska (and Hawaii) had the timezone names changed in 1967. 182# old new 183# Pacific Standard Time(PST) -same- 184# Yukon Standard Time(YST) -same- 185# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 186# Nome Standard Time (NT) Bering Standard Time (BST) 187# 188# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 189# The YST zone now covers nearly all of the state, AHST just part 190# of the Aleutian islands. No DST. 191 192# From Paul Eggert (1995-12-19): 193# The tables below use 'NST', not 'NT', for Nome Standard Time. 194# I invented 'CAWT' for Central Alaska War Time. 195 196# From U. S. Naval Observatory (1989-01-19): 197# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 198# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 199# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 200# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 201# USA MOUNTAIN 7 H BEHIND UTC DENVER 202# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 203# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 204# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 205# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 206# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 207# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 208# USA " 9 H BEHIND UTC APR 3 - OCT 30 209# USA HAWAII 10 H BEHIND UTC 210# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 211 212# From Arthur David Olson (1989-01-21): 213# The above dates are for 1988. 214# Note the "AKST" and "AKDT" abbreviations, the claim that there's 215# no DST in Samoa, and the claim that there is DST in Alaska and the 216# Aleutians. 217 218# From Arthur David Olson (1988-02-13): 219# Legal standard time zone names, from United States Code (1982 Edition and 220# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 221# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 222# took effect), as explained in sections 263 and 261: 223# (none) 224# United States standard eastern time 225# United States standard mountain time 226# United States standard central time 227# United States standard Pacific time 228# (none) 229# United States standard Alaska time 230# (none) 231# Next, names from 1967-04-01 until 1983-11-30 (the date for 232# public law 98-181): 233# Atlantic standard time 234# eastern standard time 235# central standard time 236# mountain standard time 237# Pacific standard time 238# Yukon standard time 239# Alaska-Hawaii standard time 240# Bering standard time 241# And after 1983-11-30: 242# Atlantic standard time 243# eastern standard time 244# central standard time 245# mountain standard time 246# Pacific standard time 247# Alaska standard time 248# Hawaii-Aleutian standard time 249# Samoa standard time 250# The law doesn't give abbreviations. 251# 252# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 253# Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time" 254# for time in Guam and the Northern Marianas. See the file "australasia". 255# 256# From Paul Eggert (2015-04-17): 257# HST and HDT are standardized abbreviations for Hawaii-Aleutian 258# standard and daylight times. See section 9.47 (p 234) of the 259# U.S. Government Printing Office Style Manual (2008) 260# http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf 261 262# From Arthur David Olson, 2005-08-09 263# The following was signed into law on 2005-08-08. 264# 265# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 266# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 267# U.S.C. 260a(a)) is amended-- 268# (1) by striking "first Sunday of April" and inserting "second 269# Sunday of March"; and 270# (2) by striking "last Sunday of October" and inserting "first 271# Sunday of November'. 272# (b) Effective Date.--Subsection (a) shall take effect 1 year after the 273# date of enactment of this Act or March 1, 2007, whichever is later. 274# (c) Report to Congress.--Not later than 9 months after the effective 275# date stated in subsection (b), the Secretary shall report to Congress 276# on the impact of this section on energy consumption in the United 277# States. 278# (d) Right to Revert.--Congress retains the right to revert the 279# Daylight Saving Time back to the 2005 time schedules once the 280# Department study is complete. 281 282# US eastern time, represented by New York 283 284# Connecticut, Delaware, District of Columbia, most of Florida, 285# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 286# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 287# New Hampshire, New Jersey, New York, North Carolina, Ohio, 288# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 289# Vermont, Virginia, West Virginia 290 291# From Dave Cantor (2004-11-02): 292# Early this summer I had the occasion to visit the Mount Washington 293# Observatory weather station atop (of course!) Mount Washington [, NH].... 294# One of the staff members said that the station was on Eastern Standard Time 295# and didn't change their clocks for Daylight Saving ... so that their 296# reports will always have times which are 5 hours behind UTC. 297 298# From Paul Eggert (2005-08-26): 299# According to today's Huntsville Times 300# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 301# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 302# in Russell County, Lanett in Chambers County and some towns in Lee County, 303# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 304# Roberts, city administrator in Phenix City. as saying "We are in the Central 305# time zone, but we do go by the Eastern time zone because so many people work 306# in Columbus." 307 308# From Paul Eggert (2014-09-06): 309# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 310# says that New York City Hall time was 3 minutes 58.4 seconds fast of 311# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the 312# nearest second. 313 314# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 315Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 316Rule NYC 1920 only - Oct lastSun 2:00 0 S 317Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 318Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 319Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 320# Zone NAME GMTOFF RULES FORMAT [UNTIL] 321Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 322 -5:00 US E%sT 1920 323 -5:00 NYC E%sT 1942 324 -5:00 US E%sT 1946 325 -5:00 NYC E%sT 1967 326 -5:00 US E%sT 327 328# US central time, represented by Chicago 329 330# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 331# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 332# Washington counties), Illinois, western Indiana 333# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 334# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 335# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 336# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 337# western Tennessee, most of Texas, Wisconsin 338 339# From Larry M. Smith (2006-04-26) re Wisconsin: 340# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 341# is currently enforced at the 01:00 time of change. Because the local 342# "bar time" in the state corresponds to 02:00, a number of citations 343# are issued for the "sale of class 'B' alcohol after prohibited 344# hours" within the deviated hour of this change every year.... 345# 346# From Douglas R. Bomberg (2007-03-12): 347# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 348# Statue 175 closer in synch with the US Congress' intent.... 349# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 350 351# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 352Rule Chicago 1920 only - Jun 13 2:00 1:00 D 353Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 354Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 355Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 356Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 357Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 358# Zone NAME GMTOFF RULES FORMAT [UNTIL] 359Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 360 -6:00 US C%sT 1920 361 -6:00 Chicago C%sT 1936 Mar 1 2:00 362 -5:00 - EST 1936 Nov 15 2:00 363 -6:00 Chicago C%sT 1942 364 -6:00 US C%sT 1946 365 -6:00 Chicago C%sT 1967 366 -6:00 US C%sT 367# Oliver County, ND switched from mountain to central time on 1992-10-25. 368Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 369 -7:00 US M%sT 1992 Oct 25 2:00 370 -6:00 US C%sT 371# Morton County, ND, switched from mountain to central time on 372# 2003-10-26, except for the area around Mandan which was already central time. 373# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 374# Officially this switch also included part of Sioux County, and 375# Jones, Mellette, and Todd Counties in South Dakota; 376# but in practice these other counties were already observing central time. 377# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 378Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 379 -7:00 US M%sT 2003 Oct 26 2:00 380 -6:00 US C%sT 381 382# From Josh Findley (2011-01-21): 383# ...it appears that Mercer County, North Dakota, changed from the 384# mountain time zone to the central time zone at the last transition from 385# daylight-saving to standard time (on Nov. 7, 2010): 386# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 387# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 388 389# From Andy Lipscomb (2011-01-24): 390# ...according to the Census Bureau, the largest city is Beulah (although 391# it's commonly referred to as Beulah-Hazen, with Hazen being the next 392# largest city in Mercer County). Google Maps places Beulah's city hall 393# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 394# of 6h47'07". 395 396Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 397 -7:00 US M%sT 2010 Nov 7 2:00 398 -6:00 US C%sT 399 400# US mountain time, represented by Denver 401# 402# Colorado, far western Kansas, Montana, western 403# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 404# New Mexico, southwestern North Dakota, 405# western South Dakota, far western Texas (El Paso County, Hudspeth County, 406# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 407# 408# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 409Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 410Rule Denver 1920 only - Oct lastSun 2:00 0 S 411Rule Denver 1921 only - May 22 2:00 0 S 412Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 413Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 414# Zone NAME GMTOFF RULES FORMAT [UNTIL] 415Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 416 -7:00 US M%sT 1920 417 -7:00 Denver M%sT 1942 418 -7:00 US M%sT 1946 419 -7:00 Denver M%sT 1967 420 -7:00 US M%sT 421 422# US Pacific time, represented by Los Angeles 423# 424# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 425# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 426# north of the Salmon River, and the towns of Burgdorf and Warren), 427# Nevada (except West Wendover), Oregon (except the northern 3/4 of 428# Malheur county), and Washington 429# 430# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 431Rule CA 1948 only - Mar 14 2:00 1:00 D 432Rule CA 1949 only - Jan 1 2:00 0 S 433Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 434Rule CA 1950 1961 - Sep lastSun 2:00 0 S 435Rule CA 1962 1966 - Oct lastSun 2:00 0 S 436# Zone NAME GMTOFF RULES FORMAT [UNTIL] 437Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 438 -8:00 US P%sT 1946 439 -8:00 CA P%sT 1967 440 -8:00 US P%sT 441 442# Alaska 443# AK%sT is the modern abbreviation for -9:00 per USNO. 444# 445# From Paul Eggert (2001-05-30): 446# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 447# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 448# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 449# also a Friday. Include only the time zone part of this transition, 450# ignoring the switch from Julian to Gregorian, since we can't represent 451# the Julian calendar. 452# 453# As far as we know, none of the exact locations mentioned below were 454# permanently inhabited in 1867 by anyone using either calendar. 455# (Yakutat was colonized by the Russians in 1799, but the settlement 456# was destroyed in 1805 by a Yakutat-kon war party.) However, there 457# were nearby inhabitants in some cases and for our purposes perhaps 458# it's best to simply use the official transition. 459 460# From Paul Eggert (2014-07-18): 461# One opinion of the early-1980s turmoil in Alaska over time zones and 462# daylight saving time appeared as graffiti on a Juneau airport wall: 463# "Welcome to Juneau. Please turn your watch back to the 19th century." 464# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 465# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 466# 467# Steve Ferguson (2011-01-31) referred to the following source: 468# Norris F. Keeping time in Alaska: national directives, local response. 469# Alaska History 2001;16(1-2). 470# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 471 472# From Arthur David Olson (2011-02-01): 473# Here's database-relevant material from the 2001 "Alaska History" article: 474# 475# On September 20 [1979]...DOT...officials decreed that on April 27, 476# 1980, Juneau and other nearby communities would move to Yukon Time. 477# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 478# Pacific Time. 479# 480# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 481# Department's September 1979 decision. Juneau and other communities in 482# northern Southeast reverted to Pacific Time on October 26. 483# 484# On October 28 [1983]...the Metlakatla Indian Community Council voted 485# unanimously to keep the reservation on Pacific Time. 486# 487# According to DOT official Joanne Petrie, Indian reservations are not 488# bound to follow time zones imposed by neighboring jurisdictions. 489# 490# (The last is consistent with how the database now handles the Navajo 491# Nation.) 492 493# From Arthur David Olson (2011-02-09): 494# I just spoke by phone with a staff member at the Metlakatla Indian 495# Community office (using contact information available at 496# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 497# It's shortly after 1:00 here on the east coast of the United States; 498# the staffer said it was shortly after 10:00 there. When I asked whether 499# that meant they were on Pacific time, they said no - they were on their 500# own time. I asked about daylight saving; they said it wasn't used. I 501# did not inquire about practices in the past. 502 503# From Arthur David Olson (2011-08-17): 504# For lack of better information, assume that Metlakatla's 505# abandonment of use of daylight saving resulted from the 1983 vote. 506 507# Zone NAME GMTOFF RULES FORMAT [UNTIL] 508Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 509 -8:57:41 - LMT 1900 Aug 20 12:00 510 -8:00 - PST 1942 511 -8:00 US P%sT 1946 512 -8:00 - PST 1969 513 -8:00 US P%sT 1980 Apr 27 2:00 514 -9:00 US Y%sT 1980 Oct 26 2:00 515 -8:00 US P%sT 1983 Oct 30 2:00 516 -9:00 US Y%sT 1983 Nov 30 517 -9:00 US AK%sT 518Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 519 -9:01:13 - LMT 1900 Aug 20 12:00 520 -8:00 - PST 1942 521 -8:00 US P%sT 1946 522 -8:00 - PST 1969 523 -8:00 US P%sT 1983 Oct 30 2:00 524 -9:00 US Y%sT 1983 Nov 30 525 -9:00 US AK%sT 526Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 527 -8:46:18 - LMT 1900 Aug 20 12:00 528 -8:00 - PST 1942 529 -8:00 US P%sT 1946 530 -8:00 - PST 1969 531 -8:00 US P%sT 1983 Oct 30 2:00 532 -8:00 - PST 533Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 534 -9:18:55 - LMT 1900 Aug 20 12:00 535 -9:00 - YST 1942 536 -9:00 US Y%sT 1946 537 -9:00 - YST 1969 538 -9:00 US Y%sT 1983 Nov 30 539 -9:00 US AK%sT 540Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 541 -9:59:36 - LMT 1900 Aug 20 12:00 542 -10:00 - CAT 1942 543 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 544 -10:00 US CAT/CAPT 1946 # Peace 545 -10:00 - CAT 1967 Apr 546 -10:00 - AHST 1969 547 -10:00 US AH%sT 1983 Oct 30 2:00 548 -9:00 US Y%sT 1983 Nov 30 549 -9:00 US AK%sT 550Zone America/Nome 12:58:21 - LMT 1867 Oct 18 551 -11:01:38 - LMT 1900 Aug 20 12:00 552 -11:00 - NST 1942 553 -11:00 US N%sT 1946 554 -11:00 - NST 1967 Apr 555 -11:00 - BST 1969 556 -11:00 US B%sT 1983 Oct 30 2:00 557 -9:00 US Y%sT 1983 Nov 30 558 -9:00 US AK%sT 559Zone America/Adak 12:13:21 - LMT 1867 Oct 18 560 -11:46:38 - LMT 1900 Aug 20 12:00 561 -11:00 - NST 1942 562 -11:00 US N%sT 1946 563 -11:00 - NST 1967 Apr 564 -11:00 - BST 1969 565 -11:00 US B%sT 1983 Oct 30 2:00 566 -10:00 US AH%sT 1983 Nov 30 567 -10:00 US H%sT 568# The following switches don't quite make our 1970 cutoff. 569# 570# Shanks writes that part of southwest Alaska (e.g. Aniak) 571# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 572# and another part (e.g. Akiak) made the same switch five weeks later. 573# 574# From David Flater (2004-11-09): 575# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 576# Historic Preservation Commission, provided this information, which 577# suggests that Unalaska deviated from statutory time from early 1967 578# possibly until 1983: 579# 580# Minutes of the Unalaska City Council Meeting, January 10, 1967: 581# "Except for St. Paul and Akutan, Unalaska is the only important 582# location not on Alaska Standard Time. The following resolution was 583# made by William Robinson and seconded by Henry Swanson: Be it 584# resolved that the City of Unalaska hereby goes to Alaska Standard 585# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 586# January 14, Alaska Standard Time.) This resolution was passed with 587# three votes for and one against." 588 589# Hawaii 590 591# From Arthur David Olson (2010-12-09): 592# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 593# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 594# the article is available at 595# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 596# and indicates that standard time was adopted effective noon, January 597# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 598# saving for the period between the last Sunday of each April and the 599# last Sunday of each September, but less than a month later repealed the 600# act," (page 220), that year-round daylight saving time was in effect 601# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 602# when clocks changed) and that clocks were changed by 30 minutes 603# effective the second Sunday of June, 1947 (page 219, with no time of 604# day given for when clocks changed). A footnote for the 1933 changes 605# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 606# and Act 163 (approved 21 May 1933)." 607 608# From Arthur David Olson (2011-01-19): 609# The following is from "Laws of the Territory of Hawaii Passed by the 610# Seventeenth Legislature: Regular Session 1933," available (as of 611# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 612# 90...At 2 o'clock ante meridian of the last Sunday in April of each 613# year, the standard time of this Territory shall be advanced one 614# hour...This Act shall take effect upon its approval. Approved this 26th 615# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 616# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 617# hereby repealed...This Act shall take effect upon its approval, upon 618# which date the standard time of this Territory shall be restored to 619# that existing immediately prior to the taking effect of said Act 90. 620# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 621# of the Territory of Hawaii." 622# 623# Note that 1933-05-21 was a Sunday. 624# We're left to guess the time of day when Act 163 was approved; guess noon. 625 626# Zone NAME GMTOFF RULES FORMAT [UNTIL] 627Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 628 -10:30 - HST 1933 Apr 30 2:00 629 -10:30 1:00 HDT 1933 May 21 12:00 630 -10:30 - HST 1942 Feb 9 2:00 631 -10:30 1:00 HDT 1945 Sep 30 2:00 632 -10:30 - HST 1947 Jun 8 2:00 633 -10:00 - HST 634Link Pacific/Honolulu Pacific/Johnston 635 636# Now we turn to US areas that have diverged from the consensus since 1970. 637 638# Arizona mostly uses MST. 639 640# From Paul Eggert (2002-10-20): 641# 642# The information in the rest of this paragraph is derived from the 643# Daylight Saving Time web page 644# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 645# maintained by the Arizona State Library, Archives and Public Records. 646# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 647# time, but by federal law railroads, airlines, bus lines, military 648# personnel, and some engaged in interstate commerce continued to 649# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 650# Gazette says that was the date the law changed, and that 04-01 was 651# the date the state's clocks would change. In 1945 the State of 652# Arizona used standard time all year, again with exceptions only as 653# mandated by federal law. Arizona observed DST in 1967, but Arizona 654# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 655# 656# Shanks says the 1944 experiment came to an end on 1944-03-17. 657# Go with the Arizona State Library instead. 658 659# Zone NAME GMTOFF RULES FORMAT [UNTIL] 660Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 661 -7:00 US M%sT 1944 Jan 1 0:01 662 -7:00 - MST 1944 Apr 1 0:01 663 -7:00 US M%sT 1944 Oct 1 0:01 664 -7:00 - MST 1967 665 -7:00 US M%sT 1968 Mar 21 666 -7:00 - MST 667# From Arthur David Olson (1988-02-13): 668# A writer from the Inter Tribal Council of Arizona, Inc., 669# notes in private correspondence dated 1987-12-28 that "Presently, only the 670# Navajo Nation participates in the Daylight Saving Time policy, due to its 671# large size and location in three states." (The "only" means that other 672# tribal nations don't use DST.) 673# 674# From Paul Eggert (2013-08-26): 675# See America/Denver for a zone appropriate for the Navajo Nation. 676 677# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 678# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 679# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 680# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 681# Teton, Twin Falls, Valley, Washington counties, and the southern 682# quarter of Idaho county) and eastern Oregon (most of Malheur County) 683# switched four weeks late in 1974. 684# 685# Zone NAME GMTOFF RULES FORMAT [UNTIL] 686Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 687 -8:00 US P%sT 1923 May 13 2:00 688 -7:00 US M%sT 1974 689 -7:00 - MST 1974 Feb 3 2:00 690 -7:00 US M%sT 691 692# Indiana 693# 694# For a map of Indiana's time zone regions, see: 695# http://en.wikipedia.org/wiki/Time_in_Indiana 696# 697# From Paul Eggert (2007-08-17): 698# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 699# with the following exceptions: 700# 701# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 702# Vanderburgh, and Warrick counties have been like America/Chicago. 703# 704# - Dearborn and Ohio counties have been like America/New_York. 705# 706# - Clark, Floyd, and Harrison counties have been like 707# America/Kentucky/Louisville. 708# 709# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 710# and Switzerland counties have their own time zone histories as noted below. 711# 712# Shanks partitioned Indiana into 345 regions, each with its own time history, 713# and wrote "Even newspaper reports present contradictory information." 714# Those Hoosiers! Such a flighty and changeable people! 715# Fortunately, most of the complexity occurred before our cutoff date of 1970. 716# 717# Other than Indianapolis, the Indiana place names are so nondescript 718# that they would be ambiguous if we left them at the 'America' level. 719# So we reluctantly put them all in a subdirectory 'America/Indiana'. 720 721# From Paul Eggert (2014-06-26): 722# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 723# says "DOT is relocating the time zone boundary in Indiana to move Starke, 724# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 725# Eastern Time Zone to the Central Time Zone.... The effective date of 726# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 727# changeover date from standard time to Daylight Saving Time." 728# Strictly speaking, this meant the affected counties changed their 729# clocks twice that night, but this obviously was in error. The intent 730# was that 01:59:59 EST be followed by 02:00:00 CDT. 731 732# From Gwillim Law (2007-02-10): 733# The Associated Press has been reporting that Pulaski County, Indiana is 734# going to switch from Central to Eastern Time on March 11, 2007.... 735# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 736 737# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 738Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 739Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 740Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 741# Zone NAME GMTOFF RULES FORMAT [UNTIL] 742Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 743 -6:00 US C%sT 1920 744 -6:00 Indianapolis C%sT 1942 745 -6:00 US C%sT 1946 746 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 747 -5:00 - EST 1957 Sep 29 2:00 748 -6:00 - CST 1958 Apr 27 2:00 749 -5:00 - EST 1969 750 -5:00 US E%sT 1971 751 -5:00 - EST 2006 752 -5:00 US E%sT 753# 754# Eastern Crawford County, Indiana, left its clocks alone in 1974, 755# as well as from 1976 through 2005. 756# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 757Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 758Rule Marengo 1951 only - Sep lastSun 2:00 0 S 759Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 760Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 761# Zone NAME GMTOFF RULES FORMAT [UNTIL] 762Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 763 -6:00 US C%sT 1951 764 -6:00 Marengo C%sT 1961 Apr 30 2:00 765 -5:00 - EST 1969 766 -5:00 US E%sT 1974 Jan 6 2:00 767 -6:00 1:00 CDT 1974 Oct 27 2:00 768 -5:00 US E%sT 1976 769 -5:00 - EST 2006 770 -5:00 US E%sT 771# 772# Daviess, Dubois, Knox, and Martin Counties, Indiana, 773# switched from eastern to central time in April 2006, then switched back 774# in November 2007. 775# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 776Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 777Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 778Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 779Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 780Rule Vincennes 1955 only - May 1 0:00 1:00 D 781Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 782Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 783Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 784Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 785# Zone NAME GMTOFF RULES FORMAT [UNTIL] 786Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 787 -6:00 US C%sT 1946 788 -6:00 Vincennes C%sT 1964 Apr 26 2:00 789 -5:00 - EST 1969 790 -5:00 US E%sT 1971 791 -5:00 - EST 2006 Apr 2 2:00 792 -6:00 US C%sT 2007 Nov 4 2:00 793 -5:00 US E%sT 794# 795# Perry County, Indiana, switched from eastern to central time in April 2006. 796# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 797Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 798Rule Perry 1946 only - Sep lastSun 2:00 0 S 799Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 800Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 801Rule Perry 1955 only - May 1 0:00 1:00 D 802Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 803Rule Perry 1960 only - Oct lastSun 2:00 0 S 804Rule Perry 1961 only - Sep lastSun 2:00 0 S 805Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 806# Zone NAME GMTOFF RULES FORMAT [UNTIL] 807Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 808 -6:00 US C%sT 1946 809 -6:00 Perry C%sT 1964 Apr 26 2:00 810 -5:00 - EST 1969 811 -5:00 US E%sT 1971 812 -5:00 - EST 2006 Apr 2 2:00 813 -6:00 US C%sT 814# 815# Pike County, Indiana moved from central to eastern time in 1977, 816# then switched back in 2006, then switched back again in 2007. 817# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 818Rule Pike 1955 only - May 1 0:00 1:00 D 819Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 820Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 821Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 822# Zone NAME GMTOFF RULES FORMAT [UNTIL] 823Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 824 -6:00 US C%sT 1955 825 -6:00 Pike C%sT 1965 Apr 25 2:00 826 -5:00 - EST 1966 Oct 30 2:00 827 -6:00 US C%sT 1977 Oct 30 2:00 828 -5:00 - EST 2006 Apr 2 2:00 829 -6:00 US C%sT 2007 Nov 4 2:00 830 -5:00 US E%sT 831# 832# Starke County, Indiana moved from central to eastern time in 1991, 833# then switched back in 2006. 834# From Arthur David Olson (1991-10-28): 835# An article on page A3 of the Sunday, 1991-10-27 Washington Post 836# notes that Starke County switched from Central time to Eastern time as of 837# 1991-10-27. 838# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 839Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 840Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 841Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 842Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 843Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 844# Zone NAME GMTOFF RULES FORMAT [UNTIL] 845Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 846 -6:00 US C%sT 1947 847 -6:00 Starke C%sT 1962 Apr 29 2:00 848 -5:00 - EST 1963 Oct 27 2:00 849 -6:00 US C%sT 1991 Oct 27 2:00 850 -5:00 - EST 2006 Apr 2 2:00 851 -6:00 US C%sT 852# 853# Pulaski County, Indiana, switched from eastern to central time in 854# April 2006 and then switched back in March 2007. 855# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 856Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 857Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 858Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 859Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 860# Zone NAME GMTOFF RULES FORMAT [UNTIL] 861Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 862 -6:00 US C%sT 1946 863 -6:00 Pulaski C%sT 1961 Apr 30 2:00 864 -5:00 - EST 1969 865 -5:00 US E%sT 1971 866 -5:00 - EST 2006 Apr 2 2:00 867 -6:00 US C%sT 2007 Mar 11 2:00 868 -5:00 US E%sT 869# 870# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 871# Zone NAME GMTOFF RULES FORMAT [UNTIL] 872Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 873 -6:00 US C%sT 1954 Apr 25 2:00 874 -5:00 - EST 1969 875 -5:00 US E%sT 1973 876 -5:00 - EST 2006 877 -5:00 US E%sT 878 879# Part of Kentucky left its clocks alone in 1974. 880# This also includes Clark, Floyd, and Harrison counties in Indiana. 881# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 882Rule Louisville 1921 only - May 1 2:00 1:00 D 883Rule Louisville 1921 only - Sep 1 2:00 0 S 884Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 885Rule Louisville 1941 only - Sep lastSun 2:00 0 S 886Rule Louisville 1946 only - Jun 2 2:00 0 S 887Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 888Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 889# Zone NAME GMTOFF RULES FORMAT [UNTIL] 890Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 891 -6:00 US C%sT 1921 892 -6:00 Louisville C%sT 1942 893 -6:00 US C%sT 1946 894 -6:00 Louisville C%sT 1961 Jul 23 2:00 895 -5:00 - EST 1968 896 -5:00 US E%sT 1974 Jan 6 2:00 897 -6:00 1:00 CDT 1974 Oct 27 2:00 898 -5:00 US E%sT 899# 900# Wayne County, Kentucky 901# 902# From Lake Cumberland LIFE 903# http://www.lake-cumberland.com/life/archive/news990129time.shtml 904# (1999-01-29) via WKYM-101.7: 905# Clinton County has joined Wayne County in asking the DoT to change from 906# the Central to the Eastern time zone.... The Wayne County government made 907# the same request in December. And while Russell County officials have not 908# taken action, the majority of respondents to a poll conducted there in 909# August indicated they would like to change to "fast time" also. 910# The three Lake Cumberland counties are the farthest east of any U.S. 911# location in the Central time zone. 912# 913# From Rich Wales (2000-08-29): 914# After prolonged debate, and despite continuing deep differences of opinion, 915# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 916# (-0500) time. They won't "fall back" this year. See Sara Shipley, 917# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 918# 919# From Paul Eggert (2001-07-16): 920# The final rule was published in the 921# Federal Register 65, 160 (2000-08-17), pp 50154-50158. 922# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 923# 924Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 925 -6:00 US C%sT 1946 926 -6:00 - CST 1968 927 -6:00 US C%sT 2000 Oct 29 2:00 928 -5:00 US E%sT 929 930 931# From Rives McDow (2000-08-30): 932# Here ... are all the changes in the US since 1985. 933# Kearny County, KS (put all of county on central; 934# previously split between MST and CST) ... 1990-10 935# Starke County, IN (from CST to EST) ... 1991-10 936# Oliver County, ND (from MST to CST) ... 1992-10 937# West Wendover, NV (from PST TO MST) ... 1999-10 938# Wayne County, KY (from CST to EST) ... 2000-10 939# 940# From Paul Eggert (2001-07-17): 941# We don't know where the line used to be within Kearny County, KS, 942# so omit that change for now. 943# See America/Indiana/Knox for the Starke County, IN change. 944# See America/North_Dakota/Center for the Oliver County, ND change. 945# West Wendover, NV officially switched from Pacific to mountain time on 946# 1999-10-31. See the 947# Federal Register 64, 203 (1999-10-21), pp 56705-56707. 948# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 949# However, the Federal Register says that West Wendover already operated 950# on mountain time, and the rule merely made this official; 951# hence a separate tz entry is not needed. 952 953# Michigan 954# 955# From Bob Devine (1988-01-28): 956# Michigan didn't observe DST from 1968 to 1973. 957# 958# From Paul Eggert (1999-03-31): 959# Shanks writes that Michigan started using standard time on 1885-09-18, 960# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 961# that Detroit kept 962# 963# local time until 1900 when the City Council decreed that clocks should 964# be put back twenty-eight minutes to Central Standard Time. Half the 965# city obeyed, half refused. After considerable debate, the decision 966# was rescinded and the city reverted to Sun time. A derisive offer to 967# erect a sundial in front of the city hall was referred to the 968# Committee on Sewers. Then, in 1905, Central time was adopted 969# by city vote. 970# 971# This story is too entertaining to be false, so go with Howse over Shanks. 972# 973# From Paul Eggert (2001-03-06): 974# Garland (1927) writes "Cleveland and Detroit advanced their clocks 975# one hour in 1914." This change is not in Shanks. We have no more 976# info, so omit this for now. 977# 978# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 979# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 980Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 981Rule Detroit 1948 only - Sep lastSun 2:00 0 S 982Rule Detroit 1967 only - Jun 14 2:00 1:00 D 983Rule Detroit 1967 only - Oct lastSun 2:00 0 S 984# Zone NAME GMTOFF RULES FORMAT [UNTIL] 985Zone America/Detroit -5:32:11 - LMT 1905 986 -6:00 - CST 1915 May 15 2:00 987 -5:00 - EST 1942 988 -5:00 US E%sT 1946 989 -5:00 Detroit E%sT 1973 990 -5:00 US E%sT 1975 991 -5:00 - EST 1975 Apr 27 2:00 992 -5:00 US E%sT 993# 994# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 995# switched from EST to CST/CDT in 1973. 996# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 997Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 998Rule Menominee 1946 only - Sep lastSun 2:00 0 S 999Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 1000Rule Menominee 1966 only - Oct lastSun 2:00 0 S 1001# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1002Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 1003 -6:00 US C%sT 1946 1004 -6:00 Menominee C%sT 1969 Apr 27 2:00 1005 -5:00 - EST 1973 Apr 29 2:00 1006 -6:00 US C%sT 1007 1008# Navassa 1009# administered by the US Fish and Wildlife Service 1010# claimed by US under the provisions of the 1856 Guano Islands Act 1011# also claimed by Haiti 1012# occupied 1857/1900 by the Navassa Phosphate Co 1013# US lighthouse 1917/1996-09 1014# currently uninhabited 1015# see Mark Fineman, "An Isle Rich in Guano and Discord", 1016# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1017# Jimmy Skaggs, _The Great Guano Rush_ (1994). 1018 1019################################################################################ 1020 1021 1022# From Paul Eggert (2014-10-31): 1023# 1024# Unless otherwise specified, the source for data through 1990 is: 1025# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1026# San Diego: ACS Publications, Inc. (2003). 1027# Unfortunately this book contains many errors and cites no sources. 1028# 1029# Gwillim Law writes that a good source 1030# for recent time zone data is the International Air Transport 1031# Association's Standard Schedules Information Manual (IATA SSIM), 1032# published semiannually. Law sent in several helpful summaries 1033# of the IATA's data after 1990. Except where otherwise noted, 1034# IATA SSIM is the source for entries after 1990. 1035# 1036# Other sources occasionally used include: 1037# 1038# Edward W. Whitman, World Time Differences, 1039# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1040# which I found in the UCLA library. 1041# 1042# William Willett, The Waste of Daylight, 19th edition 1043# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1044# [PDF] (1914-03) 1045# 1046# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1047# <http://www.jstor.org/stable/1774359>. 1048# 1049# See the 'europe' file for Greenland. 1050 1051# Canada 1052 1053# From Alain LaBont�� (1994-11-14): 1054# I post here the time zone abbreviations standardized in Canada 1055# for both English and French in the CAN/CSA-Z234.4-89 standard.... 1056# 1057# UTC Standard time Daylight saving time 1058# offset French English French English 1059# -2:30 - - HAT NDT 1060# -3 - - HAA ADT 1061# -3:30 HNT NST - - 1062# -4 HNA AST HAE EDT 1063# -5 HNE EST HAC CDT 1064# -6 HNC CST HAR MDT 1065# -7 HNR MST HAP PDT 1066# -8 HNP PST HAY YDT 1067# -9 HNY YST - - 1068# 1069# HN: Heure Normale ST: Standard Time 1070# HA: Heure Avanc��e DT: Daylight saving Time 1071# 1072# A: de l'Atlantique Atlantic 1073# C: du Centre Central 1074# E: de l'Est Eastern 1075# M: Mountain 1076# N: Newfoundland 1077# P: du Pacifique Pacific 1078# R: des Rocheuses 1079# T: de Terre-Neuve 1080# Y: du Yukon Yukon 1081# 1082# From Paul Eggert (1994-11-22): 1083# Alas, this sort of thing must be handled by localization software. 1084 1085# Unless otherwise specified, the data entries for Canada are all from Shanks 1086# & Pottenger. 1087 1088# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1089# 2007-03-01): 1090# The British Columbia government announced yesterday that it will 1091# adjust daylight savings next year to align with changes in the 1092# U.S. and the rest of Canada.... 1093# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1094# ... 1095# Nova Scotia 1096# Daylight saving time will be extended by four weeks starting in 2007.... 1097# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1098# 1099# [For New Brunswick] the new legislation dictates that the time change is to 1100# be done at 02:00 instead of 00:01. 1101# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1102# ... 1103# Manitoba has traditionally changed the clock every fall at 03:00. 1104# As of 2006, the transition is to take place one hour earlier at 02:00. 1105# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1106# ... 1107# [Alberta, Ontario, Quebec] will follow US rules. 1108# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1109# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1110# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1111# ... 1112# P.E.I. will follow US rules.... 1113# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1114# ... 1115# Province of Newfoundland and Labrador.... 1116# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1117# ... 1118# Yukon 1119# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1120# ... 1121# N.W.T. will follow US rules. Whoever maintains the government web site 1122# does not seem to believe in bookmarks. To see the news release, click the 1123# following link and search for "Daylight Savings Time Change". Press the 1124# "Daylight Savings Time Change" link; it will fire off a popup using 1125# JavaScript. 1126# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1127# ... 1128# Nunavut 1129# An amendment to the Interpretation Act was registered on February 19/2007.... 1130# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1131 1132# From Paul Eggert (2014-10-18): 1133# H. David Matthews and Mary Vincent's map 1134# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1135# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp 1136# contains detailed boundaries for regions observing nonstandard 1137# time and daylight saving time arrangements in Canada circa 1998. 1138# 1139# National Research Council Canada maintains info about time zones and DST. 1140# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1141# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 1142# Its unofficial information is often taken from Matthews and Vincent. 1143 1144# From Paul Eggert (2006-06-27): 1145# For now, assume all of DST-observing Canada will fall into line with the 1146# new US DST rules, 1147 1148# From Chris Walton (2011-12-01) 1149# In the first of Tammy Hardwick's articles 1150# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1151# she quotes the Friday November 1/1918 edition of the Creston Review. 1152# The quote includes these two statements: 1153# 'Sunday the CPR went back to the old system of time...' 1154# '... The daylight saving scheme was dropped all over Canada at the same time,' 1155# These statements refer to a transition from daylight time to standard time 1156# that occurred nationally on Sunday October 27/1918. This transition was 1157# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1158 1159# In light of that evidence, we alter the date from the earlier believed 1160# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1161# than Thursday) in all Canadian rulesets. 1162 1163# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1164Rule Canada 1918 only - Apr 14 2:00 1:00 D 1165Rule Canada 1918 only - Oct 27 2:00 0 S 1166Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1167Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1168Rule Canada 1945 only - Sep 30 2:00 0 S 1169Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1170Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1171Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1172Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1173Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1174 1175 1176# Newfoundland and Labrador 1177 1178# From Paul Eggert (2000-10-02): 1179# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1180# but the only part of Labrador that follows the rules is the 1181# southeast corner, including Port Hope Simpson and Mary's Harbour, 1182# but excluding, say, Black Tickle. 1183 1184# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1185Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1186Rule StJohns 1917 only - Sep 17 2:00 0 S 1187# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1188Rule StJohns 1919 only - May 5 23:00 1:00 D 1189Rule StJohns 1919 only - Aug 12 23:00 0 S 1190# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1191Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1192Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1193# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1194# Pottenger. 1195Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1196Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1197# Whitman gives the following transitions: 1198# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1199# but go with Shanks & Pottenger and assume they used Canadian rules. 1200# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1201# Apr 30 - Sep 24; go with Shanks & Pottenger. 1202Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1203Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1204Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1205Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1206Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1207# From Paul Eggert (2000-10-02): 1208# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1209# at 00:01 local time. For now, assume it started in 1987. 1210 1211# From Michael Pelley (2011-09-12): 1212# We received today, Monday, September 12, 2011, notification that the 1213# changes to the Newfoundland Standard Time Act have been proclaimed. 1214# The change in the Act stipulates that the change from Daylight Savings 1215# Time to Standard Time and from Standard Time to Daylight Savings Time 1216# now occurs at 2:00AM. 1217# ... 1218# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1219# ... 1220# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1221# Office of the Chief Information Officer 1222# Executive Council 1223# Government of Newfoundland & Labrador 1224 1225Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1226Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1227Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1228Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1229Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1230Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1231# 1232# St John's has an apostrophe, but Posix file names can't have apostrophes. 1233# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1234Zone America/St_Johns -3:30:52 - LMT 1884 1235 -3:30:52 StJohns N%sT 1918 1236 -3:30:52 Canada N%sT 1919 1237 -3:30:52 StJohns N%sT 1935 Mar 30 1238 -3:30 StJohns N%sT 1942 May 11 1239 -3:30 Canada N%sT 1946 1240 -3:30 StJohns N%sT 2011 Nov 1241 -3:30 Canada N%sT 1242 1243# most of east Labrador 1244 1245# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1246# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1247Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1248 -3:30:52 - NST 1918 1249 -3:30:52 Canada N%sT 1919 1250 -3:30:52 - NST 1935 Mar 30 1251 -3:30 - NST 1936 1252 -3:30 StJohns N%sT 1942 May 11 1253 -3:30 Canada N%sT 1946 1254 -3:30 StJohns N%sT 1966 Mar 15 2:00 1255 -4:00 StJohns A%sT 2011 Nov 1256 -4:00 Canada A%sT 1257 1258 1259# west Labrador, Nova Scotia, Prince Edward I 1260 1261# From Paul Eggert (2006-03-22): 1262# Shanks & Pottenger write that since 1970 most of this region has been like 1263# Halifax. Many locales did not observe peacetime DST until 1972; 1264# Glace Bay, NS is the largest that we know of. 1265# Shanks & Pottenger also write that Liverpool, NS was the only town 1266# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1267# this is a typo. 1268 1269# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1270Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1271Rule Halifax 1916 only - Oct 1 0:00 0 S 1272Rule Halifax 1920 only - May 9 0:00 1:00 D 1273Rule Halifax 1920 only - Aug 29 0:00 0 S 1274Rule Halifax 1921 only - May 6 0:00 1:00 D 1275Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1276Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1277Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1278Rule Halifax 1923 only - Sep 4 0:00 0 S 1279Rule Halifax 1924 only - Sep 15 0:00 0 S 1280Rule Halifax 1925 only - Sep 28 0:00 0 S 1281Rule Halifax 1926 only - May 16 0:00 1:00 D 1282Rule Halifax 1926 only - Sep 13 0:00 0 S 1283Rule Halifax 1927 only - May 1 0:00 1:00 D 1284Rule Halifax 1927 only - Sep 26 0:00 0 S 1285Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1286Rule Halifax 1928 only - Sep 9 0:00 0 S 1287Rule Halifax 1929 only - Sep 3 0:00 0 S 1288Rule Halifax 1930 only - Sep 15 0:00 0 S 1289Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1290Rule Halifax 1932 only - May 1 0:00 1:00 D 1291Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1292Rule Halifax 1933 only - Oct 2 0:00 0 S 1293Rule Halifax 1934 only - May 20 0:00 1:00 D 1294Rule Halifax 1934 only - Sep 16 0:00 0 S 1295Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1296Rule Halifax 1935 only - Sep 30 0:00 0 S 1297Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1298Rule Halifax 1936 only - Sep 14 0:00 0 S 1299Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1300Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1301Rule Halifax 1939 only - May 28 0:00 1:00 D 1302Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1303Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1304Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1305Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1306Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1307Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1308Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1309Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1310Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1311# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1312Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1313 -4:00 Halifax A%sT 1918 1314 -4:00 Canada A%sT 1919 1315 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1316 -4:00 Canada A%sT 1946 1317 -4:00 Halifax A%sT 1974 1318 -4:00 Canada A%sT 1319Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1320 -4:00 Canada A%sT 1953 1321 -4:00 Halifax A%sT 1954 1322 -4:00 - AST 1972 1323 -4:00 Halifax A%sT 1974 1324 -4:00 Canada A%sT 1325 1326# New Brunswick 1327 1328# From Paul Eggert (2007-01-31): 1329# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1330# says they changed at 00:01 through 2006, and 1331# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1332# clear that this was the case since at least 1993. 1333# For now, assume it started in 1993. 1334 1335# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1336Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1337Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1338Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1339Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1340Rule Moncton 1939 only - May 27 1:00 1:00 D 1341Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1342Rule Moncton 1940 only - May 19 1:00 1:00 D 1343Rule Moncton 1941 only - May 4 1:00 1:00 D 1344Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1345Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1346Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1347Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1348Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1349# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1350Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1351 -5:00 - EST 1902 Jun 15 1352 -4:00 Canada A%sT 1933 1353 -4:00 Moncton A%sT 1942 1354 -4:00 Canada A%sT 1946 1355 -4:00 Moncton A%sT 1973 1356 -4:00 Canada A%sT 1993 1357 -4:00 Moncton A%sT 2007 1358 -4:00 Canada A%sT 1359 1360# Quebec 1361 1362# From Paul Eggert (2015-03-24): 1363# See America/Toronto for most of Quebec, including Montreal. 1364# 1365# Matthews and Vincent (1998) also write that Quebec east of the -63 1366# meridian is supposed to observe AST, but residents as far east as 1367# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1368# The Quebec department of justice writes in 1369# "The situation in Minganie and Basse-C��te-Nord" 1370# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1371# that the coastal strip from just east of Natashquan to Blanc-Sablon 1372# observes Atlantic standard time all year round. 1373# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1374# says this common practice was codified into law as of 2007. 1375# For lack of better info, guess this practice began around 1970, contra to 1376# Shanks & Pottenger who have this region observing AST/ADT. 1377 1378# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1379Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1380 -4:00 Canada A%sT 1970 1381 -4:00 - AST 1382 1383# Ontario 1384 1385# From Paul Eggert (2006-07-09): 1386# Shanks & Pottenger write that since 1970 most of Ontario has been like 1387# Toronto. 1388# Thunder Bay skipped DST in 1973. 1389# Many smaller locales did not observe peacetime DST until 1974; 1390# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1391# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1392 1393# From Mark Brader (2003-07-26): 1394# [According to the Toronto Star] Orillia, Ontario, adopted DST 1395# effective Saturday, 1912-06-22, 22:00; the article mentions that 1396# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1397# have already done so. In Orillia DST was to run until Saturday, 1398# 1912-08-31 (no time mentioned), but it was met with considerable 1399# hostility from certain segments of the public, and was revoked after 1400# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1401# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1402# earlier in June). 1403# 1404# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1405 1406# From Paul Eggert (1997-10-17): 1407# Mark Brader writes that an article in the 1997-10-14 Toronto Star 1408# says that Atikokan, Ontario currently does not observe DST, 1409# but will vote on 11-10 whether to use EST/EDT. 1410# He also writes that the Ontario Time Act (1990, Chapter T.9) 1411# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 1412# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1413# Officially Atikokan is therefore on CST/CDT, and most likely this report 1414# concerns a non-official time observed as a matter of local practice. 1415# 1416# From Paul Eggert (2000-10-02): 1417# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1418# New Osnaburgh observe CST all year, that Big Trout Lake observes 1419# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1420# violation of the official Ontario rules. 1421# 1422# From Paul Eggert (2006-07-09): 1423# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1424# 2005-07-21 Chronicle-Journal, which said: 1425# 1426# The clocks in Atikokan stay set on standard time year-round. 1427# This means they spend about half the time on central time and 1428# the other half on eastern time. 1429# 1430# For the most part, the system works, Mayor Dennis Brown said. 1431# 1432# "The majority of businesses in Atikokan deal more with Eastern 1433# Canada, but there are some that deal with Western Canada," he 1434# said. "I don't see any changes happening here." 1435# 1436# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1437# [New Osnaburgh] follow the same practice." 1438 1439# From Garry McKinnon (2006-07-14) via Chris Walton: 1440# I chatted with a member of my board who has an outstanding memory 1441# and a long history in Atikokan (and in the telecom industry) and he 1442# can say for certain that Atikokan has been practicing the current 1443# time keeping since 1952, at least. 1444 1445# From Paul Eggert (2006-07-17): 1446# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1447# ever since standard time was introduced, but the information from 1448# McKinnon sounds more authoritative. For now, assume that Atikokan 1449# switched to EST immediately after WWII era daylight saving time 1450# ended. This matches the old (less-populous) America/Coral_Harbour 1451# entry since our cutoff date of 1970, so we can move 1452# America/Coral_Harbour to the 'backward' file. 1453 1454# From Mark Brader (2010-03-06): 1455# 1456# Currently the database has: 1457# 1458# # Ontario 1459# 1460# # From Paul Eggert (2006-07-09): 1461# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1462# # Toronto. 1463# # Thunder Bay skipped DST in 1973. 1464# # Many smaller locales did not observe peacetime DST until 1974; 1465# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1466# 1467# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1468# right corner of page 1, it says that Toronto will return to standard 1469# time at 2 am Sunday morning (which agrees with the database), and that: 1470# 1471# The one-hour setback will go into effect throughout most of Ontario, 1472# except in areas like Windsor which remains on standard time all year. 1473# 1474# Windsor is, of course, a lot larger than Nipigon. 1475# 1476# I only came across this incidentally. I don't know if Windsor began 1477# observing DST when Detroit did, or in 1974, or on some other date. 1478# 1479# By the way, the article continues by noting that: 1480# 1481# Some cities in the United States have pushed the deadline back 1482# three weeks and will change over from daylight saving in October. 1483 1484# From Arthur David Olson (2010-07-17): 1485# 1486# "Standard Time and Time Zones in Canada" appeared in 1487# The Journal of The Royal Astronomical Society of Canada, 1488# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1489# was available at 1490# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1491# 1492# It includes the text below (starting on page 57): 1493# 1494# A list of the places in Canada using daylight saving time would 1495# require yearly revision. From information kindly furnished by 1496# the provincial governments and by the postmasters in many cities 1497# and towns, it is found that the following places used daylight sav- 1498# ing in 1930. The information for the province of Quebec is definite, 1499# for the other provinces only approximate: 1500# 1501# Province Daylight saving time used 1502# Prince Edward Island Not used. 1503# Nova Scotia In Halifax only. 1504# New Brunswick In St. John only. 1505# Quebec In the following places: 1506# Montreal Lachine 1507# Quebec Mont-Royal 1508# L��vis Iberville 1509# St. Lambert Cap de la Madel��ine 1510# Verdun Loretteville 1511# Westmount Richmond 1512# Outremont St. J��r��me 1513# Longueuil Greenfield Park 1514# Arvida Waterloo 1515# Chambly-Canton Beaulieu 1516# Melbourne La Tuque 1517# St. Th��ophile Buckingham 1518# Ontario Used generally in the cities and towns along 1519# the southerly part of the province. Not 1520# used in the northwesterly part. 1521# Manitoba Not used. 1522# Saskatchewan In Regina only. 1523# Alberta Not used. 1524# British Columbia Not used. 1525# 1526# With some exceptions, the use of daylight saving may be said to be limited 1527# to those cities and towns lying between Quebec city and Windsor, Ont. 1528 1529# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1530Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1531Rule Toronto 1919 only - Oct 26 0:00 0 S 1532Rule Toronto 1920 only - May 2 2:00 1:00 D 1533Rule Toronto 1920 only - Sep 26 0:00 0 S 1534Rule Toronto 1921 only - May 15 2:00 1:00 D 1535Rule Toronto 1921 only - Sep 15 2:00 0 S 1536Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1537# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1538# was meant. 1539Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1540Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1541# The 1927-to-1939 rules can be expressed more simply as 1542# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1543# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1544# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1545# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1546# The rules below avoid use of Sun>=25 1547# (which pre-2004 versions of zic cannot handle). 1548Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1549Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1550Rule Toronto 1932 only - May 1 2:00 1:00 D 1551Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1552Rule Toronto 1933 only - Oct 1 2:00 0 S 1553Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1554Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1555Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1556Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1557Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1558Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1559Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1560Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1561Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1562# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1563# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1564# is wrong, and that he had confirmed it by checking the 1971-10-30 1565# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1566Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1567 1568# From Paul Eggert (2003-07-27): 1569# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1570# Port Arthur, Ontario, the principle of the Bill has been in 1571# operation for the past three years, and in the City of Moose Jaw, 1572# Saskatchewan, for one year." 1573 1574# From David Bryan via Tory Tronrud, Director/Curator, 1575# Thunder Bay Museum (2003-11-12): 1576# There is some suggestion, however, that, by-law or not, daylight 1577# savings time was being practiced in Fort William and Port Arthur 1578# before 1909.... [I]n 1910, the line between the Eastern and Central 1579# Time Zones was permanently moved about two hundred miles west to 1580# include the Thunder Bay area.... When Canada adopted daylight 1581# savings time in 1916, Fort William and Port Arthur, having done so 1582# already, did not change their clocks.... During the Second World 1583# War,... [t]he cities agreed to implement DST during the summer 1584# months for the remainder of the war years. 1585 1586# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1587Zone America/Toronto -5:17:32 - LMT 1895 1588 -5:00 Canada E%sT 1919 1589 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1590 -5:00 Canada E%sT 1946 1591 -5:00 Toronto E%sT 1974 1592 -5:00 Canada E%sT 1593Zone America/Thunder_Bay -5:57:00 - LMT 1895 1594 -6:00 - CST 1910 1595 -5:00 - EST 1942 1596 -5:00 Canada E%sT 1970 1597 -5:00 Toronto E%sT 1973 1598 -5:00 - EST 1974 1599 -5:00 Canada E%sT 1600Zone America/Nipigon -5:53:04 - LMT 1895 1601 -5:00 Canada E%sT 1940 Sep 29 1602 -5:00 1:00 EDT 1942 Feb 9 2:00s 1603 -5:00 Canada E%sT 1604Zone America/Rainy_River -6:18:16 - LMT 1895 1605 -6:00 Canada C%sT 1940 Sep 29 1606 -6:00 1:00 CDT 1942 Feb 9 2:00s 1607 -6:00 Canada C%sT 1608Zone America/Atikokan -6:06:28 - LMT 1895 1609 -6:00 Canada C%sT 1940 Sep 29 1610 -6:00 1:00 CDT 1942 Feb 9 2:00s 1611 -6:00 Canada C%sT 1945 Sep 30 2:00 1612 -5:00 - EST 1613 1614 1615# Manitoba 1616 1617# From Rob Douglas (2006-04-06): 1618# the old Manitoba Time Act - as amended by Bill 2, assented to 1619# March 27, 1987 ... said ... 1620# "between two o'clock Central Standard Time in the morning of 1621# the first Sunday of April of each year and two o'clock Central 1622# Standard Time in the morning of the last Sunday of October next 1623# following, one hour in advance of Central Standard Time."... 1624# I believe that the English legislation [of the old time act] had 1625# been assented to (March 22, 1967).... 1626# Also, as far as I can tell, there was no order-in-council varying 1627# the time of Daylight Saving Time for 2005 and so the provisions of 1628# the 1987 version would apply - the changeover was at 2:00 Central 1629# Standard Time (i.e. not until 3:00 Central Daylight Time). 1630 1631# From Paul Eggert (2006-04-10): 1632# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1633# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1634# it was also 02:00s in 1966. 1635 1636# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1637Rule Winn 1916 only - Apr 23 0:00 1:00 D 1638Rule Winn 1916 only - Sep 17 0:00 0 S 1639Rule Winn 1918 only - Apr 14 2:00 1:00 D 1640Rule Winn 1918 only - Oct 27 2:00 0 S 1641Rule Winn 1937 only - May 16 2:00 1:00 D 1642Rule Winn 1937 only - Sep 26 2:00 0 S 1643Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1644Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1645Rule Winn 1945 only - Sep lastSun 2:00 0 S 1646Rule Winn 1946 only - May 12 2:00 1:00 D 1647Rule Winn 1946 only - Oct 13 2:00 0 S 1648Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1649Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1650Rule Winn 1950 only - May 1 2:00 1:00 D 1651Rule Winn 1950 only - Sep 30 2:00 0 S 1652Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1653Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1654Rule Winn 1959 only - Oct lastSun 2:00 0 S 1655Rule Winn 1960 only - Sep lastSun 2:00 0 S 1656Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1657Rule Winn 1963 only - Sep 22 2:00 0 S 1658Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1659Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1660Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1661# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1662Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1663 -6:00 Winn C%sT 2006 1664 -6:00 Canada C%sT 1665 1666 1667# Saskatchewan 1668 1669# From Mark Brader (2003-07-26): 1670# The first actual adoption of DST in Canada was at the municipal 1671# level. As the [Toronto] Star put it (1912-06-07), "While people 1672# elsewhere have long been talking of legislation to save daylight, 1673# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1674# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1675# presumably late evening, as below), and would run until "the end of 1676# the summer". The discrepancy between municipal time and railroad 1677# time was noted. 1678 1679# From Paul Eggert (2003-07-27): 1680# Willett (1914-03) notes that DST "has been in operation ... in the 1681# City of Moose Jaw, Saskatchewan, for one year." 1682 1683# From Paul Eggert (2006-03-22): 1684# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1685# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1686# Other western towns (e.g. Lloydminster) are like Edmonton. 1687# Matthews and Vincent (1998) write that Denare Beach and Creighton 1688# are like Winnipeg, in violation of Saskatchewan law. 1689 1690# From W. Jones (1992-11-06): 1691# The. . .below is based on information I got from our law library, the 1692# provincial archives, and the provincial Community Services department. 1693# A precise history would require digging through newspaper archives, and 1694# since you didn't say what you wanted, I didn't bother. 1695# 1696# Saskatchewan is split by a time zone meridian (105W) and over the years 1697# the boundary became pretty ragged as communities near it reevaluated 1698# their affiliations in one direction or the other. In 1965 a provincial 1699# referendum favoured legislating common time practices. 1700# 1701# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1702# Saskatchewan 1978) was proclaimed, and established that the eastern 1703# part of Saskatchewan would use CST year round, that districts in 1704# northwest Saskatchewan would by default follow CST but could opt to 1705# follow Mountain Time rules (thus 1 hour difference in the winter and 1706# zero in the summer), and that districts in southwest Saskatchewan would 1707# by default follow MT but could opt to follow CST. 1708# 1709# It took a few years for the dust to settle (I know one story of a town 1710# on one time zone having its school in another, such that a mom had to 1711# serve her family lunch in two shifts), but presently it seems that only 1712# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1713# rules any more; all other districts appear to have used CST year round 1714# since sometime in the 1960s. 1715 1716# From Chris Walton (2006-06-26): 1717# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1718# long and rather painful to read. 1719# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1720 1721# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1722Rule Regina 1918 only - Apr 14 2:00 1:00 D 1723Rule Regina 1918 only - Oct 27 2:00 0 S 1724Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1725Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1726Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1727Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1728Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1729Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1730Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1731Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1732Rule Regina 1945 only - Sep lastSun 2:00 0 S 1733Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1734Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1735Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1736Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1737Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1738Rule Regina 1959 only - Oct lastSun 2:00 0 S 1739# 1740Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1741Rule Swift 1957 only - Oct lastSun 2:00 0 S 1742Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1743Rule Swift 1959 only - Oct lastSun 2:00 0 S 1744Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1745# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1746Zone America/Regina -6:58:36 - LMT 1905 Sep 1747 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1748 -6:00 - CST 1749Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1750 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1751 -7:00 Regina M%sT 1950 1752 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1753 -6:00 - CST 1754 1755 1756# Alberta 1757 1758# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1759Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1760Rule Edm 1918 only - Oct 27 2:00 0 S 1761Rule Edm 1919 only - May 27 2:00 0 S 1762Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1763Rule Edm 1920 only - Oct lastSun 2:00 0 S 1764Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1765Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1766Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1767Rule Edm 1945 only - Sep lastSun 2:00 0 S 1768Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1769Rule Edm 1947 only - Sep lastSun 2:00 0 S 1770Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1771Rule Edm 1967 only - Oct lastSun 2:00 0 S 1772Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1773Rule Edm 1969 only - Oct lastSun 2:00 0 S 1774Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1775Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1776# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1777Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1778 -7:00 Edm M%sT 1987 1779 -7:00 Canada M%sT 1780 1781 1782# British Columbia 1783 1784# From Paul Eggert (2006-03-22): 1785# Shanks & Pottenger write that since 1970 most of this region has 1786# been like Vancouver. 1787# Dawson Creek uses MST. Much of east BC is like Edmonton. 1788# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1789 1790# It seems though that (re: Creston) is not entirely correct: 1791 1792# From Chris Walton (2011-12-01): 1793# There are two areas within the Canadian province of British Columbia 1794# that do not currently observe daylight saving: 1795# a) The Creston Valley (includes the town of Creston and surrounding area) 1796# b) The eastern half of the Peace River Regional District 1797# (includes the cities of Dawson Creek and Fort St. John) 1798 1799# Earlier this year I stumbled across a detailed article about the time 1800# keeping history of Creston; it was written by Tammy Hardwick who is the 1801# manager of the Creston & District Museum. The article was written in May 2009. 1802# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1803# According to the article, Creston has not changed its clocks since June 1918. 1804# i.e. Creston has been stuck on UTC-7 for 93 years. 1805# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1806 1807# Unfortunately the exact date for the time change in June 1918 remains 1808# unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1809# ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1810# as plausible as any other date (in June). She also said that after writing 1811# the article she had discovered another time change in 1916; this is the 1812# subject of another article which she wrote in October 2010. 1813# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1814 1815# Here is a summary of the three clock change events in Creston's history: 1816# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1817# Exact date unknown 1818# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1819# Exact date in October unknown; Sunday October 1 is a reasonable guess. 1820# 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1821# Exact date in June unknown; Sunday June 2 is a reasonable guess. 1822# note#1: 1823# On Oct 27/1918 when daylight saving ended in the rest of Canada, 1824# Creston did not change its clocks. 1825# note#2: 1826# During WWII when the Federal Government legislated a mandatory clock change, 1827# Creston did not oblige. 1828# note#3: 1829# There is no guarantee that Creston will remain on Mountain Standard Time 1830# (UTC-7) forever. 1831# The subject was debated at least once this year by the town Council. 1832# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1833 1834# During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1835# In Creston, that was handled by shifting the area to PST (-8:00) then applying 1836# summer time to cause the offset to be -7:00, the same as it had been before 1837# the change. It can be argued that the timezone abbreviation during this 1838# period should be PDT rather than MST, but that doesn't seem important enough 1839# (to anyone) to further complicate the rules. 1840 1841# The transition dates (and times) are guesses. 1842 1843# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1844Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1845Rule Vanc 1918 only - Oct 27 2:00 0 S 1846Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1847Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1848Rule Vanc 1945 only - Sep 30 2:00 0 S 1849Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1850Rule Vanc 1946 only - Oct 13 2:00 0 S 1851Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1852Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1853# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1854Zone America/Vancouver -8:12:28 - LMT 1884 1855 -8:00 Vanc P%sT 1987 1856 -8:00 Canada P%sT 1857Zone America/Dawson_Creek -8:00:56 - LMT 1884 1858 -8:00 Canada P%sT 1947 1859 -8:00 Vanc P%sT 1972 Aug 30 2:00 1860 -7:00 - MST 1861Zone America/Creston -7:46:04 - LMT 1884 1862 -7:00 - MST 1916 Oct 1 1863 -8:00 - PST 1918 Jun 2 1864 -7:00 - MST 1865 1866# Northwest Territories, Nunavut, Yukon 1867 1868# From Paul Eggert (2006-03-22): 1869# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1870# Mathew Englander (1996-10-07) gives the following refs: 1871# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1872# c. 7 defines Yukon standard time as UTC-9.... 1873# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1874# [http://canlii.ca/t/7vhg] 1875# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1876# * O.I.C. 1980/02 established DST. 1877# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1878 1879# From Brian Inglis (2015-04-14): 1880# 1881# I tried to trace the history of Yukon time and found the following 1882# regulations, giving the reference title and URL if found, regulation name, 1883# and relevant quote if available. Each regulation specifically revokes its 1884# predecessor. The final reference is to the current Interpretation Act 1885# authorizing and resulting from these regulatory changes. 1886# 1887# Only recent regulations were retrievable via Yukon government site search or 1888# index, and only some via Canadian legal sources. Other sources used include 1889# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS 1890# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and 1891# 1970 quoted below; each article includes current extracts from provincial 1892# and territorial ST and DST regulations at the end, summaries and details of 1893# standard times and daylight saving time at many locations across Canada, 1894# with time zone maps, tables and calculations for Canadian Sunrise, Sunset, 1895# and LMST; they also cover many countries and global locations, with a chart 1896# and table showing current Universal Time offsets, and may be useful as 1897# another source of information for 1970 and earlier. 1898# 1899# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, 1900# pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) 1901# http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: 1902# Yukon Interpretation Ordinance 1903# Yukon standard time is the local mean time at the one hundred and 1904# thirty-fifth meridian. 1905# 1906# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; 1907# JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System 1908# (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: 1909# Yukon Interpretation Ordinance, 1955, Chap. 16. 1910# 1911# (1) Subject to this section, standard time shall be reckoned as nine 1912# hours behind Greenwich Time and called Yukon Standard Time. 1913# 1914# (2) Notwithstanding subsection (1), the Commissioner may make regulations 1915# varying the manner of reckoning standard time. 1916# 1917# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance 1918# http://? - no online source found 1919# 1920# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, 1921# Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) 1922# http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon 1923# Territory Commissioner's Order 1967-59 Interpretation Ordinance ... 1924# 1925# 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon 1926# Territory on 27th January, 1966, is hereby revoked. 1927# 1928# 2. Yukon (East) Standard Time as defined by section 36 of the 1929# Interpretation Ordinance from and after mid-night on the 28th day of May, 1930# 1967 shall be reckoned in the same manner as Pacific Standard Time, that 1931# is to say, eight hours behind Greenwich Time in the area of the Yukon 1932# Territory lying east of the 138th degree longitude west. 1933# 1934# 3. In the remainder of the Territory, lying west of the 138th degree 1935# longitude west, Yukon (West) Standard Time shall be reckoned as nine 1936# hours behind Greenwich Time. 1937# 1938# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 1939# http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html 1940# C.O. 1973/214 INTERPRETATION ACT ... 1941# 1942# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby 1943# revoked. 1944# 1945# 2. Yukon Standard Time as defined by section 36 of the Interpretation 1946# Act from and after midnight on the twenty-eighth day of October, 1973 1947# shall be reckoned in the same manner as Pacific Standard Time, that is 1948# to say eight hours behind Greenwich Time. 1949# 1950# * O.I.C. 1980/02 INTERPRETATION ACT 1951# http://? - no online source found 1952# 1953# * Yukon Daylight Saving Time, YOIC 1987/56 1954# http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html 1955# O.I.C. 1987/056 INTERPRETATION ACT ... 1956# 1957# In every year between 1958# (a) two o'clock in the morning in the first Sunday in April, and 1959# (b) two o'clock in the morning in the last Sunday in October, 1960# Standard Time shall be reckoned as seven hours behind Greenwich Time and 1961# called Yukon Daylight Saving Time. 1962# ... 1963# Dated ... 9th day of March, A.D., 1987. 1964# 1965# * Yukon Daylight Saving Time 2006, YOIC 2006/127 1966# http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html 1967# O.I.C. 2006/127 INTERPRETATION ACT ... 1968# 1969# 1. In Yukon each year the time for general purposes shall be 7 hours 1970# behind Greenwich mean time during the period commencing at two o'clock 1971# in the forenoon on the second Sunday of March and ending at two o'clock 1972# in the forenoon on the first Sunday of November and shall be called 1973# Yukon Daylight Saving Time. 1974# 1975# 2. Order-in-Council 1987/56 is revoked. 1976# 1977# 3. This order comes into force January 1, 2007. 1978# 1979# * Interpretation Act, RSY 2002, c 125 1980# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html 1981 1982# From Rives McDow (1999-09-04): 1983# Nunavut ... moved ... to incorporate the whole territory into one time zone. 1984# Nunavut moves to single time zone Oct. 31 1985# http://www.nunatsiaq.com/nunavut/nvt90903_13.html 1986# 1987# From Antoine Leca (1999-09-06): 1988# We then need to create a new timezone for the Kitikmeot region of Nunavut 1989# to differentiate it from the Yellowknife region. 1990 1991# From Paul Eggert (1999-09-20): 1992# Basic Facts: The New Territory 1993# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 1994# (1999) reports that Pangnirtung operates on eastern time, 1995# and that Coral Harbour does not observe DST. We don't know when 1996# Pangnirtung switched to eastern time; we'll guess 1995. 1997 1998# From Rives McDow (1999-11-08): 1999# On October 31, when the rest of Nunavut went to Central time, 2000# Pangnirtung wobbled. Here is the result of their wobble: 2001# 2002# The following businesses and organizations in Pangnirtung use Central Time: 2003# 2004# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 2005# Eastern Arctic National Parks, A & D Specialist 2006# 2007# The following businesses and organizations in Pangnirtung use Eastern Time: 2008# 2009# Hamlet office, All other businesses, Both schools, Airport operator 2010# 2011# This has made for an interesting situation there, which warranted the news. 2012# No one there that I spoke with seems concerned, or has plans to 2013# change the local methods of keeping time, as it evidently does not 2014# really interfere with any activities or make things difficult locally. 2015# They plan to celebrate New Year's turn-over twice, one hour apart, 2016# so it appears that the situation will last at least that long. 2017# The Nunavut Intergovernmental Affairs hopes that they will "come to 2018# their senses", but the locals evidently don't see any problem with 2019# the current state of affairs. 2020 2021# From Michaela Rodrigue, writing in the 2022# Nunatsiaq News (1999-11-19): 2023# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html 2024# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 2025# central - or Nunavut time - for government offices, and eastern time 2026# for municipal offices and schools.... Igloolik [was similar but then] 2027# made the switch to central time on Saturday, Nov. 6. 2028 2029# From Paul Eggert (2000-10-02): 2030# Matthews and Vincent (1998) say the following, but we lack histories 2031# for these potential new Zones. 2032# 2033# The Canadian Forces station at Alert uses Eastern Time while the 2034# handful of residents at the Eureka weather station [in the Central 2035# zone] skip daylight savings. Baffin Island, which is crossed by the 2036# Central, Eastern and Atlantic Time zones only uses Eastern Time. 2037# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 2038# Central Time and Southampton Island [in the Central zone] is not 2039# required to use daylight savings. 2040 2041# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 2042# Nunavut now has two time zones (2000-11-10): 2043# The Nunavut government would allow its employees in Kugluktuk and 2044# Cambridge Bay to operate on central time year-round, putting them 2045# one hour behind the rest of Nunavut for six months during the winter. 2046# At the end of October the two communities had rebelled against 2047# Nunavut's unified time zone, refusing to shift to eastern time with 2048# the rest of the territory for the winter. Cambridge Bay remained on 2049# central time, while Kugluktuk, even farther west, reverted to 2050# mountain time, which they had used before the advent of Nunavut's 2051# unified time zone in 1999. 2052# 2053# From Rives McDow (2001-01-20), quoting the Nunavut government: 2054# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 2055 2056# From Paul Eggert (2000-12-04): 2057# Let's just keep track of the official times for now. 2058 2059# From Rives McDow (2001-03-07): 2060# The premier of Nunavut has issued a ministerial statement advising 2061# that effective 2001-04-01, the territory of Nunavut will revert 2062# back to three time zones (mountain, central, and eastern). Of the 2063# cities in Nunavut, Coral Harbor is the only one that I know of that 2064# has said it will not observe dst, staying on EST year round. I'm 2065# checking for more info, and will get back to you if I come up with 2066# more. 2067# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 2068 2069# From Gwillim Law (2005-05-21): 2070# According to ... 2071# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2072# (from a 1998 Canadian Geographic article), the de facto and de jure time 2073# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2074# round. Using Google, it's easy to find other websites that confirm this. 2075# I wasn't able to find how far back this time regimen goes, but since it 2076# predates the creation of Nunavut, it probably goes back many years.... 2077# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2078# 2079# From Paul Eggert (2014-10-17): 2080# For lack of better information, assume that Southampton Island observed 2081# daylight saving only during wartime. Gwillim Law's email also 2082# mentioned maps now maintained by National Research Council Canada; 2083# see above for an up-to-date link. 2084 2085# From Chris Walton (2007-03-01): 2086# ... the community of Resolute (located on Cornwallis Island in 2087# Nunavut) moved from Central Time to Eastern Time last November. 2088# Basically the community did not change its clocks at the end of 2089# daylight saving.... 2090# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2091 2092# From Chris Walton (2011-03-21): 2093# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2094# Bay. Resolute Bay is a small community located about 900km north of 2095# the Arctic Circle. The zone file was required because Resolute Bay had 2096# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2097# 2098# According to new information which I received last week, Resolute Bay 2099# went back to using UTC-6 in the winter of 2007-2008... 2100# 2101# On March 11/2007 most of Canada went onto daylight saving. On March 2102# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2103# talked to somebody that was both knowledgeable and helpful. I was able 2104# to confirm that Resolute Bay was still operating on UTC-5. It was 2105# explained to me that Resolute Bay had been on the Eastern Time zone 2106# (EST) in the winter, and was now back on the Central Time zone (CDT). 2107# i.e. the time zone had changed twice in the last year but the clocks 2108# had not moved. The residents had to know which time zone they were in 2109# so they could follow the correct TV schedule... 2110# 2111# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2112# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2113# of the phone call, I decided to seek out an alternate source of 2114# information. I found an e-mail address for somebody by the name of 2115# Stephanie Adams whose job was listed as "Inns North Support Officer for 2116# Arctic Co-operatives." I was under the impression that Stephanie lived 2117# and worked in Resolute Bay... 2118# 2119# On March 14/2011 I phoned the hamlet office again. I was told that 2120# Resolute Bay had been using Central Standard Time over the winter of 2121# 2010-2011 and that the clocks had therefore been moved one hour ahead 2122# on March 13/2011. The person I talked to was aware that Resolute Bay 2123# had previously experimented with Eastern Standard Time but he could not 2124# tell me when the practice had stopped. 2125# 2126# On March 17/2011 I searched the Web to find an e-mail address of 2127# somebody that might be able to tell me exactly when Resolute Bay went 2128# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2129# used to be the mayor of Resolute Bay and he apparently owns half the 2130# businesses including "South Camp Inn." This website has some info on 2131# Aziz: 2132# http://www.uphere.ca/node/493 2133# 2134# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2135# Eastern Standard Time. 2136# 2137# Aziz responded quickly with this: "hi, The time was not changed for the 2138# 1 year only, the following year, the community went back to the old way 2139# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2140# the winter Zulu plus 6 hrs" 2141# 2142# This of course conflicted with everything I had ascertained in November 2008. 2143# 2144# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2145# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2146# may want to check with the weather office in Resolute Bay or do a 2147# search on the weather through Env. Canada. web site" 2148# 2149# If I had realized the Stephanie did not live in Resolute Bay I would 2150# never have contacted her. I now believe that all the information I 2151# obtained in November 2008 should be ignored... 2152# I apologize for reporting incorrect information in 2008. 2153 2154# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2155Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2156Rule NT_YK 1918 only - Oct 27 2:00 0 S 2157Rule NT_YK 1919 only - May 25 2:00 1:00 D 2158Rule NT_YK 1919 only - Nov 1 0:00 0 S 2159Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2160Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2161Rule NT_YK 1945 only - Sep 30 2:00 0 S 2162Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2163Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2164Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2165Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2166Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2167# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2168# aka Panniqtuuq 2169Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 2170 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2171 -5:00 Canada E%sT 1999 Oct 31 2:00 2172 -6:00 Canada C%sT 2000 Oct 29 2:00 2173 -5:00 Canada E%sT 2174# formerly Frobisher Bay 2175Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 2176 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2177 -6:00 Canada C%sT 2000 Oct 29 2:00 2178 -5:00 Canada E%sT 2179# aka Qausuittuq 2180Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 2181 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2182 -5:00 - EST 2001 Apr 1 3:00 2183 -6:00 Canada C%sT 2006 Oct 29 2:00 2184 -5:00 - EST 2007 Mar 11 3:00 2185 -6:00 Canada C%sT 2186# aka Kangiqiniq 2187Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2188 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2189 -5:00 - EST 2001 Apr 1 3:00 2190 -6:00 Canada C%sT 2191# aka Iqaluktuuttiaq 2192Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 2193 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2194 -6:00 Canada C%sT 2000 Oct 29 2:00 2195 -5:00 - EST 2000 Nov 5 0:00 2196 -6:00 - CST 2001 Apr 1 3:00 2197 -7:00 Canada M%sT 2198Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2199 -7:00 NT_YK M%sT 1980 2200 -7:00 Canada M%sT 2201Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 2202 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2203 -7:00 NT_YK M%sT 1980 2204 -7:00 Canada M%sT 2205Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2206 -9:00 NT_YK Y%sT 1967 May 28 0:00 2207 -8:00 NT_YK P%sT 1980 2208 -8:00 Canada P%sT 2209Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2210 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2211 -8:00 NT_YK P%sT 1980 2212 -8:00 Canada P%sT 2213 2214 2215############################################################################### 2216 2217# Mexico 2218 2219# From Paul Eggert (2014-12-07): 2220# The Investigation and Analysis Service of the 2221# Mexican Library of Congress (MLoC) has published a 2222# history of Mexican local time (in Spanish) 2223# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 2224# 2225# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2226# (In all cases we go with the MLoC.) 2227# S&P report that Baja was at -8:00 in 1922/1923. 2228# S&P say the 1930 transition in Baja was 1930-11-16. 2229# S&P report no DST during summer 1931. 2230# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2231 2232# From Gwillim Law (2001-02-20): 2233# There are some other discrepancies between the Decrees page and the 2234# tz database. I think they can best be explained by supposing that 2235# the researchers who prepared the Decrees page failed to find some of 2236# the relevant documents. 2237 2238# From Alan Perry (1996-02-15): 2239# A guy from our Mexico subsidiary finally found the Presidential Decree 2240# outlining the timezone changes in Mexico. 2241# 2242# ------------- Begin Forwarded Message ------------- 2243# 2244# I finally got my hands on the Official Presidential Decree that sets up the 2245# rules for the DST changes. The rules are: 2246# 2247# 1. The country is divided in 3 timezones: 2248# - Baja California Norte (the Mexico/BajaNorte TZ) 2249# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2250# - The rest of the country (the Mexico/General TZ) 2251# 2252# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2253# at 2:00 AM, the times in each zone are as follows: 2254# BajaNorte: GMT+7 2255# BajaSur: GMT+6 2256# General: GMT+5 2257# 2258# 3. The rest of the year, the times are as follows: 2259# BajaNorte: GMT+8 2260# BajaSur: GMT+7 2261# General: GMT+6 2262# 2263# The Decree was published in Mexico's Official Newspaper on January 4th. 2264# 2265# -------------- End Forwarded Message -------------- 2266# From Paul Eggert (1996-06-12): 2267# For an English translation of the decree, see 2268# "Diario Oficial: Time Zone Changeover" (1996-01-04). 2269# http://mexico-travel.com/extra/timezone_eng.html 2270 2271# From Rives McDow (1998-10-08): 2272# The State of Quintana Roo has reverted back to central STD and DST times 2273# (i.e. UTC -0600 and -0500 as of 1998-08-02). 2274 2275# From Rives McDow (2000-01-10): 2276# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2277# zone 5 hours from the International Date Line, and will not observe daylight 2278# savings time so as to stay on the same time zone as the southern part of 2279# Arizona year round. 2280 2281# From Jesper N��rgaard, translating 2282# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2283# In Oaxaca, the 55.000 teachers from the Section 22 of the National 2284# Syndicate of Education Workers, refuse to apply daylight saving each 2285# year, so that the more than 10,000 schools work at normal hour the 2286# whole year. 2287 2288# From Gwillim Law (2001-01-19): 2289# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2290# (translated):... 2291# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2292# that Summer Time will be reduced from seven to five months, starting 2293# this year.... 2294# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 2295# [translated], says "summer time will ... take effect on the first Sunday 2296# in May, and end on the last Sunday of September. 2297 2298# From Arthur David Olson (2001-01-25): 2299# The 2001-01-24 traditional Washington Post contained the page one 2300# story "Timely Issue Divides Mexicans."... 2301# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2302# ... Mexico City Mayor L��pez Obrador "...is threatening to keep 2303# Mexico City and its 20 million residents on a different time than 2304# the rest of the country..." In particular, L��pez Obrador would abolish 2305# observation of Daylight Saving Time. 2306 2307# Official statute published by the Energy Department 2308# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2309# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2310# and Sonora with no DST. This was reported by Jesper N��rgaard (2001-02-03). 2311 2312# From Paul Eggert (2001-03-03): 2313# 2314# http://www.latimes.com/news/nation/20010303/t000018766.html 2315# James F. Smith writes in today's LA Times 2316# * Sonora will continue to observe standard time. 2317# * Last week Mexico City's mayor Andr��s Manuel L��pez Obrador decreed that 2318# the Federal District will not adopt DST. 2319# * 4 of 16 district leaders announced they'll ignore the decree. 2320# * The decree does not affect federal-controlled facilities including 2321# the airport, banks, hospitals, and schools. 2322# 2323# For now we'll assume that the Federal District will bow to federal rules. 2324 2325# From Jesper N��rgaard (2001-04-01): 2326# I found some references to the Mexican application of daylight 2327# saving, which modifies what I had already sent you, stating earlier 2328# that a number of northern Mexican states would go on daylight 2329# saving. The modification reverts this to only cover Baja California 2330# (Norte), while all other states (except Sonora, who has no daylight 2331# saving all year) will follow the original decree of president 2332# Vicente Fox, starting daylight saving May 6, 2001 and ending 2333# September 30, 2001. 2334# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 2335# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2336 2337# From Reuters (2001-09-04): 2338# Mexico's Supreme Court on Tuesday declared that daylight savings was 2339# unconstitutional in Mexico City, creating the possibility the 2340# capital will be in a different time zone from the rest of the nation 2341# next year.... The Supreme Court's ruling takes effect at 2:00 2342# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2343# standard time. "This is so residents of the Federal District are not 2344# subject to unexpected time changes," a statement from the court said. 2345 2346# From Jesper N��rgaard Welen (2002-03-12): 2347# ... consulting my local grocery store(!) and my coworkers, they all insisted 2348# that a new decision had been made to reinstate US style DST in Mexico.... 2349# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2350# confirms this. Sonora as usual is the only state where DST is not applied. 2351 2352# From Steffen Thorsen (2009-12-28): 2353# 2354# Steffen Thorsen wrote: 2355# > Mexico's House of Representatives has approved a proposal for northern 2356# > Mexico's border cities to share the same daylight saving schedule as 2357# > the United States. 2358# Now this has passed both the Congress and the Senate, so starting from 2359# 2010, some border regions will be the same: 2360# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2361# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2362# (Spanish) 2363# 2364# Could not find the new law text, but the proposed law text changes are here: 2365# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2366# (Gaceta Parlamentaria) 2367# 2368# There is also a list of the votes here: 2369# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2370# 2371# Our page: 2372# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2373 2374# From Arthur David Olson (2010-01-20): 2375# The page 2376# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2377# includes this text: 2378# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2379# Ju��rez y Ojinaga en Chihuahua; Acu��a y Piedras Negras en Coahuila; 2380# An��huac en Nuevo Le��n; y Nuevo Laredo, Reynosa y Matamoros en 2381# Tamaulipas, la aplicaci��n de este horario estacional surtir�� efecto 2382# desde las dos horas del segundo domingo de marzo y concluir�� a las dos 2383# horas del primer domingo de noviembre. 2384# En los municipios fronterizos que se encuentren ubicados en la franja 2385# fronteriza norte en el territorio comprendido entre la l��nea 2386# internacional y la l��nea paralela ubicada a una distancia de veinte 2387# kil��metros, as�� como la Ciudad de Ensenada, Baja California, hacia el 2388# interior del pa��s, la aplicaci��n de este horario estacional surtir�� 2389# efecto desde las dos horas del segundo domingo de marzo y concluir�� a 2390# las dos horas del primer domingo de noviembre. 2391 2392# From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 2393# The Mexican state of Quintana Roo will likely change to EST in 2015. 2394# 2395# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 2396# "With this change, the time conflict that has existed between the municipios 2397# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 2398# end. The latter declared itself in rebellion 15 years ago when a time change 2399# was initiated in Mexico, and since then it has refused to change its time 2400# zone along with the rest of the country." 2401# 2402# From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 2403# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 2404# "...the new time zone will come into effect at two o'clock on the first Sunday 2405# of February, when we will have to advance the clock one hour from its current 2406# time..." 2407# Also, the new zone will not use DST. 2408# 2409# From Carlos Ra��l Perasso (2015-02-02): 2410# The decree that modifies the Mexican Hour System Law has finally 2411# been published at the Diario Oficial de la Federaci��n 2412# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 2413# It establishes 5 zones for Mexico: 2414# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, 2415# includes most of Mexico, excluding what's mentioned below. 2416# 2- Zona Pac��fico (Pacific Zone): Longitude 105 W, includes the 2417# states of Baja California Sur; Chihuahua; Nayarit (excluding Bah��a 2418# de Banderas which lies in Central Zone); Sinaloa and Sonora. 2419# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the 2420# state of Baja California. 2421# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state 2422# of Quintana Roo. 2423# 5- The islands, reefs and keys shall take their timezone from the 2424# longitude they are located at. 2425 2426# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2427Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2428Rule Mexico 1939 only - Jun 25 0:00 0 S 2429Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2430Rule Mexico 1941 only - Apr 1 0:00 0 S 2431Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2432Rule Mexico 1944 only - May 1 0:00 0 S 2433Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2434Rule Mexico 1950 only - Jul 30 0:00 0 S 2435Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2436Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2437Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2438Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2439Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2440Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2441# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2442# Quintana Roo; represented by Canc��n 2443Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2444 -6:00 - CST 1981 Dec 23 2445 -5:00 Mexico E%sT 1998 Aug 2 2:00 2446 -6:00 Mexico C%sT 2015 Feb 1 2:00 2447 -5:00 - EST 2448# Campeche, Yucat��n; represented by M��rida 2449Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2450 -6:00 - CST 1981 Dec 23 2451 -5:00 - EST 1982 Dec 2 2452 -6:00 Mexico C%sT 2453# Coahuila, Durango, Nuevo Le��n, Tamaulipas (near US border) 2454Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2455 -6:00 - CST 1988 2456 -6:00 US C%sT 1989 2457 -6:00 Mexico C%sT 2010 2458 -6:00 US C%sT 2459# Coahuila, Durango, Nuevo Le��n, Tamaulipas (away from US border) 2460Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2461 -6:00 - CST 1988 2462 -6:00 US C%sT 1989 2463 -6:00 Mexico C%sT 2464# Central Mexico 2465Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2466 -7:00 - MST 1927 Jun 10 23:00 2467 -6:00 - CST 1930 Nov 15 2468 -7:00 - MST 1931 May 1 23:00 2469 -6:00 - CST 1931 Oct 2470 -7:00 - MST 1932 Apr 1 2471 -6:00 Mexico C%sT 2001 Sep 30 2:00 2472 -6:00 - CST 2002 Feb 20 2473 -6:00 Mexico C%sT 2474# Chihuahua (near US border) 2475Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2476 -7:00 - MST 1927 Jun 10 23:00 2477 -6:00 - CST 1930 Nov 15 2478 -7:00 - MST 1931 May 1 23:00 2479 -6:00 - CST 1931 Oct 2480 -7:00 - MST 1932 Apr 1 2481 -6:00 - CST 1996 2482 -6:00 Mexico C%sT 1998 2483 -6:00 - CST 1998 Apr Sun>=1 3:00 2484 -7:00 Mexico M%sT 2010 2485 -7:00 US M%sT 2486# Chihuahua (away from US border) 2487Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2488 -7:00 - MST 1927 Jun 10 23:00 2489 -6:00 - CST 1930 Nov 15 2490 -7:00 - MST 1931 May 1 23:00 2491 -6:00 - CST 1931 Oct 2492 -7:00 - MST 1932 Apr 1 2493 -6:00 - CST 1996 2494 -6:00 Mexico C%sT 1998 2495 -6:00 - CST 1998 Apr Sun>=1 3:00 2496 -7:00 Mexico M%sT 2497# Sonora 2498Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2499 -7:00 - MST 1927 Jun 10 23:00 2500 -6:00 - CST 1930 Nov 15 2501 -7:00 - MST 1931 May 1 23:00 2502 -6:00 - CST 1931 Oct 2503 -7:00 - MST 1932 Apr 1 2504 -6:00 - CST 1942 Apr 24 2505 -7:00 - MST 1949 Jan 14 2506 -8:00 - PST 1970 2507 -7:00 Mexico M%sT 1999 2508 -7:00 - MST 2509 2510# From Alexander Krivenyshev (2010-04-21): 2511# According to news, Bah��a de Banderas (Mexican state of Nayarit) 2512# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2513# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2514# 2515# (Spanish) 2516# Bah��a de Banderas homologa su horario al del centro del 2517# pa��s, a partir de este domingo 2518# http://www.nayarit.gob.mx/notes.asp?id=20748 2519# 2520# Bah��a de Banderas homologa su horario con el del Centro del 2521# Pa��s 2522# 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 2523# 2524# (English) 2525# Puerto Vallarta and Bah��a de Banderas: One Time Zone 2526# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2527# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2528# 2529# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2530# will allow Bah��a de Banderas and Puerto Vallarta to share the same time 2531# zone ..." 2532# Baja California Sur, Nayarit, Sinaloa 2533 2534# From Arthur David Olson (2010-05-01): 2535# Use "Bahia_Banderas" to keep the name to fourteen characters. 2536 2537# Mazatl��n 2538Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2539 -7:00 - MST 1927 Jun 10 23:00 2540 -6:00 - CST 1930 Nov 15 2541 -7:00 - MST 1931 May 1 23:00 2542 -6:00 - CST 1931 Oct 2543 -7:00 - MST 1932 Apr 1 2544 -6:00 - CST 1942 Apr 24 2545 -7:00 - MST 1949 Jan 14 2546 -8:00 - PST 1970 2547 -7:00 Mexico M%sT 2548 2549# Bah��a de Banderas 2550Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2551 -7:00 - MST 1927 Jun 10 23:00 2552 -6:00 - CST 1930 Nov 15 2553 -7:00 - MST 1931 May 1 23:00 2554 -6:00 - CST 1931 Oct 2555 -7:00 - MST 1932 Apr 1 2556 -6:00 - CST 1942 Apr 24 2557 -7:00 - MST 1949 Jan 14 2558 -8:00 - PST 1970 2559 -7:00 Mexico M%sT 2010 Apr 4 2:00 2560 -6:00 Mexico C%sT 2561 2562# Baja California (near US border) 2563Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2564 -7:00 - MST 1924 2565 -8:00 - PST 1927 Jun 10 23:00 2566 -7:00 - MST 1930 Nov 15 2567 -8:00 - PST 1931 Apr 1 2568 -8:00 1:00 PDT 1931 Sep 30 2569 -8:00 - PST 1942 Apr 24 2570 -8:00 1:00 PWT 1945 Aug 14 23:00u 2571 -8:00 1:00 PPT 1945 Nov 12 # Peace 2572 -8:00 - PST 1948 Apr 5 2573 -8:00 1:00 PDT 1949 Jan 14 2574 -8:00 - PST 1954 2575 -8:00 CA P%sT 1961 2576 -8:00 - PST 1976 2577 -8:00 US P%sT 1996 2578 -8:00 Mexico P%sT 2001 2579 -8:00 US P%sT 2002 Feb 20 2580 -8:00 Mexico P%sT 2010 2581 -8:00 US P%sT 2582# Baja California (away from US border) 2583Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2584 -7:00 - MST 1924 2585 -8:00 - PST 1927 Jun 10 23:00 2586 -7:00 - MST 1930 Nov 15 2587 -8:00 - PST 1931 Apr 1 2588 -8:00 1:00 PDT 1931 Sep 30 2589 -8:00 - PST 1942 Apr 24 2590 -8:00 1:00 PWT 1945 Aug 14 23:00u 2591 -8:00 1:00 PPT 1945 Nov 12 # Peace 2592 -8:00 - PST 1948 Apr 5 2593 -8:00 1:00 PDT 1949 Jan 14 2594 -8:00 - PST 1954 2595 -8:00 CA P%sT 1961 2596 -8:00 - PST 1976 2597 -8:00 US P%sT 1996 2598 -8:00 Mexico P%sT 2001 2599 -8:00 US P%sT 2002 Feb 20 2600 -8:00 Mexico P%sT 2601# From Paul Eggert (2006-03-22): 2602# Formerly there was an America/Ensenada zone, which differed from 2603# America/Tijuana only in that it did not observe DST from 1976 2604# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2605# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2606# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2607# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2608# DST-observance was a town-by-town matter back then. This concerns 2609# data after 1970 so most likely there should be at least one Zone 2610# other than America/Tijuana for Baja, but it's not clear yet what its 2611# name or contents should be. 2612# 2613# Revillagigedo Is 2614# no information 2615 2616############################################################################### 2617 2618# Anguilla 2619# Antigua and Barbuda 2620# See America/Port_of_Spain. 2621 2622# Bahamas 2623# 2624# For 1899 Milne gives -5:09:29.5; round that. 2625# 2626# From Sue Williams (2006-12-07): 2627# The Bahamas announced about a month ago that they plan to change their DST 2628# rules to sync with the U.S. starting in 2007.... 2629# http://www.jonesbahamas.com/?c=45&a=10412 2630 2631# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2632Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2633Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2634# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2635Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 2636 -5:00 Bahamas E%sT 1976 2637 -5:00 US E%sT 2638 2639# Barbados 2640 2641# For 1899 Milne gives -3:58:29.2; round that. 2642 2643# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2644Rule Barb 1977 only - Jun 12 2:00 1:00 D 2645Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2646Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2647Rule Barb 1979 only - Sep 30 2:00 0 S 2648Rule Barb 1980 only - Sep 25 2:00 0 S 2649# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2650Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2651 -3:58:29 - BMT 1932 # Bridgetown Mean Time 2652 -4:00 Barb A%sT 2653 2654# Belize 2655# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2656# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2657Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2658Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2659Rule Belize 1973 only - Dec 5 0:00 1:00 D 2660Rule Belize 1974 only - Feb 9 0:00 0 S 2661Rule Belize 1982 only - Dec 18 0:00 1:00 D 2662Rule Belize 1983 only - Feb 12 0:00 0 S 2663# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2664Zone America/Belize -5:52:48 - LMT 1912 Apr 2665 -6:00 Belize C%sT 2666 2667# Bermuda 2668 2669# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2670# Bermuda dockyard, Ireland I; round that. 2671 2672# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2673 2674# Next year, however, clocks in the US will go forward on the second Sunday 2675# in March, until the first Sunday in November. And, after the Time Zone 2676# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2677# Friday, the same thing will happen in Bermuda. 2678# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2679 2680# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2681Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2682 -4:00 - AST 1974 Apr 28 2:00 2683 -4:00 Canada A%sT 1976 2684 -4:00 US A%sT 2685 2686# Cayman Is 2687# See America/Panama. 2688 2689# Costa Rica 2690 2691# Milne gives -5:36:13.3 as San Jos�� mean time; round to nearest. 2692 2693# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2694Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2695Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2696Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2697# IATA SSIM (1991-09) says the following was at 1:00; 2698# go with Shanks & Pottenger. 2699Rule CR 1991 only - Jul 1 0:00 0 S 2700Rule CR 1992 only - Mar 15 0:00 0 S 2701# There are too many San Jos��s elsewhere, so we'll use 'Costa Rica'. 2702# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2703Zone America/Costa_Rica -5:36:13 - LMT 1890 # San Jos�� 2704 -5:36:13 - SJMT 1921 Jan 15 # San Jos�� Mean Time 2705 -6:00 CR C%sT 2706# Coco 2707# no information; probably like America/Costa_Rica 2708 2709# Cuba 2710 2711# From Paul Eggert (2013-02-21): 2712# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2713# for the port, and -5:30 for meteorological observations. 2714# For now, stick with Shanks & Pottenger. 2715 2716# From Arthur David Olson (1999-03-29): 2717# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2718# the Cuban National Team and the Baltimore Orioles was carried live on 2719# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2720# During the game, play-by-play announcer Jim Hunter noted that 2721# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2722# Time today." (The "two hour" remark referred to losing one hour of 2723# sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2724# to DST - and one more hour on 1999-04-04 - when the announcers will have 2725# returned to Baltimore, which switches on that date.) 2726 2727# From Steffen Thorsen (2013-11-11): 2728# DST start in Cuba in 2004 ... does not follow the same rules as the 2729# years before. The correct date should be Sunday 2004-03-28 00:00 ... 2730# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2731 2732# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2733# Cuba is not going back to standard time this year. 2734# From Paul Eggert (2006-03-22): 2735# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2736# says that it's due to a problem at the Antonio Guiteras 2737# thermoelectric plant, and says "This October there will be no return 2738# to normal hours (after daylight saving time)". 2739# For now, let's assume that it's a temporary measure. 2740 2741# From Carlos A. Carnero Delgado (2005-11-12): 2742# This year (just like in 2004-2005) there's no change in time zone 2743# adjustment in Cuba. We will stay in daylight saving time: 2744# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2745 2746# From Jesper N��rgaard Welen (2006-10-21): 2747# An article in GRANMA INTERNACIONAL claims that Cuba will end 2748# the 3 years of permanent DST next weekend, see 2749# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2750# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2751# watches should be set back one hour - going back to 00:00 hours - returning 2752# to the normal schedule.... 2753 2754# From Paul Eggert (2007-03-02): 2755# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2756# says Cuban clocks will advance at midnight on March 10. 2757# For lack of better information, assume Cuba will use US rules, 2758# except that it switches at midnight standard time as usual. 2759# 2760# From Steffen Thorsen (2007-10-25): 2761# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2762# earlier - on the last Sunday of October, just like in 2006. 2763# 2764# He supplied these references: 2765# 2766# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2767# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2768# 2769# From Alex Krivenyshev (2007-10-25): 2770# Here is also article from Granma (Cuba): 2771# 2772# Regir�� el Horario Normal desde el pr��ximo domingo 28 de octubre 2773# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2774# 2775# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2776 2777# From Arthur David Olson (2008-03-09): 2778# I'm in Maryland which is now observing United States Eastern Daylight 2779# Time. At 9:44 local time I used RealPlayer to listen to 2780# http://media.enet.cu/radioreloj 2781# a Cuban information station, and heard 2782# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2783# indicating that Cuba is still on standard time. 2784 2785# From Steffen Thorsen (2008-03-12): 2786# It seems that Cuba will start DST on Sunday, 2007-03-16... 2787# It was announced yesterday, according to this source (in Spanish): 2788# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2789# 2790# Some more background information is posted here: 2791# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2792# 2793# The article also says that Cuba has been observing DST since 1963, 2794# while Shanks (and tzdata) has 1965 as the first date (except in the 2795# 1940's). Many other web pages in Cuba also claim that it has been 2796# observed since 1963, but with the exception of 1970 - an exception 2797# which is not present in tzdata/Shanks. So there is a chance we need to 2798# change some historic records as well. 2799# 2800# One example: 2801# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2802 2803# From Jesper N��rgaard Welen (2008-03-13): 2804# The Cuban time change has just been confirmed on the most authoritative 2805# web site, the Granma. Please check out 2806# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2807# 2808# Basically as expected after Steffen Thorsen's information, the change 2809# will take place midnight between Saturday and Sunday. 2810 2811# From Arthur David Olson (2008-03-12): 2812# Assume Sun>=15 (third Sunday) going forward. 2813 2814# From Alexander Krivenyshev (2009-03-04) 2815# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2816# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2817# not on midnight March 14 / March 15 as previously thought. 2818# 2819# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2820# (in Spanish) 2821 2822# From Arthur David Olson (2009-03-09) 2823# I listened over the Internet to 2824# http://media.enet.cu/readioreloj 2825# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2826# the time was announced as "diez cinco" - the same time as here, indicating 2827# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2828 2829# From Steffen Thorsen (2011-03-08): 2830# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2831# this year. Nothing about the end date known so far (if that has 2832# changed at all). 2833# 2834# Source: 2835# http://granma.co.cu/2011/03/08/nacional/artic01.html 2836# 2837# Our info: 2838# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2839# 2840# From Steffen Thorsen (2011-10-30) 2841# Cuba will end DST two weeks later this year. Instead of going back 2842# tonight, it has been delayed to 2011-11-13 at 01:00. 2843# 2844# One source (Spanish) 2845# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2846# 2847# Our page: 2848# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2849# 2850# From Steffen Thorsen (2012-03-01) 2851# According to Radio Reloj, Cuba will start DST on Midnight between March 2852# 31 and April 1. 2853# 2854# Radio Reloj has the following info (Spanish): 2855# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2856# 2857# Our info on it: 2858# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2859 2860# From Steffen Thorsen (2012-11-03): 2861# Radio Reloj and many other sources report that Cuba is changing back 2862# to standard time on 2012-11-04: 2863# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2864# From Paul Eggert (2012-11-03): 2865# For now, assume the future rule is first Sunday in November. 2866 2867# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2868Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2869Rule Cuba 1928 only - Oct 10 0:00 0 S 2870Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2871Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2872Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2873Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2874Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2875Rule Cuba 1965 only - Sep 30 0:00 0 S 2876Rule Cuba 1966 only - May 29 0:00 1:00 D 2877Rule Cuba 1966 only - Oct 2 0:00 0 S 2878Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2879Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2880Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2881Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2882Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2883Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2884Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2885Rule Cuba 1978 only - May 7 0:00 1:00 D 2886Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2887Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2888Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2889Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2890Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2891Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2892Rule Cuba 1996 only - Oct 6 0:00s 0 S 2893Rule Cuba 1997 only - Oct 12 0:00s 0 S 2894Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2895Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2896Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2897Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2898Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2899Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2900Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2901Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2902Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2903Rule Cuba 2011 only - Nov 13 0:00s 0 S 2904Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 2905Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2906Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 2907 2908# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2909Zone America/Havana -5:29:28 - LMT 1890 2910 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2911 -5:00 Cuba C%sT 2912 2913# Dominica 2914# See America/Port_of_Spain. 2915 2916# Dominican Republic 2917 2918# From Steffen Thorsen (2000-10-30): 2919# Enrique Morales reported to me that the Dominican Republic has changed the 2920# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2921# http://www.listin.com.do/antes/261000/republica/princi.html 2922 2923# From Paul Eggert (2000-12-04): 2924# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2925 2926# From Rives McDow (2000-12-01): 2927# Dominican Republic changed its mind and presidential decree on Tuesday, 2928# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2929# Dominican Republic will be reverting to 8 hours from the International Date 2930# Line, and will not be using DST in the foreseeable future. The reason they 2931# decided to use DST was to be in synch with Puerto Rico, who was also going 2932# to implement DST. When Puerto Rico didn't implement DST, the president 2933# decided to revert. 2934 2935 2936# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2937Rule DR 1966 only - Oct 30 0:00 1:00 D 2938Rule DR 1967 only - Feb 28 0:00 0 S 2939Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2940Rule DR 1970 only - Feb 21 0:00 0 S 2941Rule DR 1971 only - Jan 20 0:00 0 S 2942Rule DR 1972 1974 - Jan 21 0:00 0 S 2943# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2944Zone America/Santo_Domingo -4:39:36 - LMT 1890 2945 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 2946 -5:00 DR E%sT 1974 Oct 27 2947 -4:00 - AST 2000 Oct 29 2:00 2948 -5:00 US E%sT 2000 Dec 3 1:00 2949 -4:00 - AST 2950 2951# El Salvador 2952 2953# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2954Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 2955Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 2956# There are too many San Salvadors elsewhere, so use America/El_Salvador 2957# instead of America/San_Salvador. 2958# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2959Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 2960 -6:00 Salv C%sT 2961 2962# Grenada 2963# Guadeloupe 2964# St Barth��lemy 2965# St Martin (French part) 2966# See America/Port_of_Spain. 2967 2968# Guatemala 2969# 2970# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2971# Diario Co Latino, at 2972# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 2973# says in an article dated 2006-04-19 that the Guatemalan government had 2974# decided on that date to advance official time by 60 minutes, to lessen the 2975# impact of the elevated cost of oil.... Daylight saving time will last from 2976# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2977# From Paul Eggert (2006-06-22): 2978# The Ministry of Energy and Mines, press release CP-15/2006 2979# (2006-04-19), says DST ends at 24:00. See 2980# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 2981 2982# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2983Rule Guat 1973 only - Nov 25 0:00 1:00 D 2984Rule Guat 1974 only - Feb 24 0:00 0 S 2985Rule Guat 1983 only - May 21 0:00 1:00 D 2986Rule Guat 1983 only - Sep 22 0:00 0 S 2987Rule Guat 1991 only - Mar 23 0:00 1:00 D 2988Rule Guat 1991 only - Sep 7 0:00 0 S 2989Rule Guat 2006 only - Apr 30 0:00 1:00 D 2990Rule Guat 2006 only - Oct 1 0:00 0 S 2991# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2992Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 2993 -6:00 Guat C%sT 2994 2995# Haiti 2996# From Gwillim Law (2005-04-15): 2997# Risto O. Nyk��nen wrote me that Haiti is now on DST. 2998# I searched for confirmation, and I found a press release 2999# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 3000# <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 3001# 3002# "The Prime Minister's Communication Office notifies the public in general 3003# and the press in particular that, following a decision of the Interior 3004# Ministry and the Territorial Collectivities [I suppose that means the 3005# provinces], Haiti will move to Eastern Daylight Time in the night from next 3006# Saturday the 2nd to Sunday the 3rd. 3007# 3008# "Consequently, the Prime Minister's Communication Office wishes to inform 3009# the population that the country's clocks will be set forward one hour 3010# starting at midnight. This provision will hold until the last Saturday in 3011# October 2005. 3012# 3013# "Port-au-Prince, March 31, 2005" 3014# 3015# From Steffen Thorsen (2006-04-04): 3016# I have been informed by users that Haiti observes DST this year like 3017# last year, so the current "only" rule for 2005 might be changed to a 3018# "max" rule or to last until 2006. (Who knows if they will observe DST 3019# next year or if they will extend their DST like US/Canada next year). 3020# 3021# I have found this article about it (in French): 3022# http://www.haitipressnetwork.com/news.cfm?articleID=7612 3023# 3024# The reason seems to be an energy crisis. 3025 3026# From Stephen Colebourne (2007-02-22): 3027# Some IATA info: Haiti won't be having DST in 2007. 3028 3029# From Steffen Thorsen (2012-03-11): 3030# According to several news sources, Haiti will observe DST this year, 3031# apparently using the same start and end date as USA/Canada. 3032# So this means they have already changed their time. 3033# 3034# http://www.alterpresse.org/spip.php?article12510 3035# http://radiovision2000haiti.net/home/?p=13253 3036# 3037# From Arthur David Olson (2012-03-11): 3038# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3039# 3:00 a.m. rather than the traditional Haitian jump at midnight. 3040# Assume a US-style fall back as well. 3041 3042# From Steffen Thorsen (2013-03-10): 3043# It appears that Haiti is observing DST this year as well, same rules 3044# as US/Canada. They did it last year as well, and it looks like they 3045# are going to observe DST every year now... 3046# 3047# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3048# http://www.canalplushaiti.net/?p=6714 3049 3050# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3051Rule Haiti 1983 only - May 8 0:00 1:00 D 3052Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3053Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3054# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3055# Go with IATA. 3056Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3057Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3058Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3059Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3060Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 3061Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S 3062# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3063Zone America/Port-au-Prince -4:49:20 - LMT 1890 3064 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3065 -5:00 Haiti E%sT 3066 3067# Honduras 3068# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3069 3070# From Paul Eggert (2006-05-05): 3071# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3072# saying Honduras will start using DST midnight Saturday, effective 4 3073# months until September. La Tribuna reported today 3074# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3075# of Honduras, refused to back down on this. 3076 3077# From Jesper N��rgaard Welen (2006-08-08): 3078# It seems that Honduras has returned from DST to standard time this Monday at 3079# 00:00 hours (prolonging Sunday to 25 hours duration). 3080# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3081 3082# From Paul Eggert (2006-08-08): 3083# Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 3084# http://www.elheraldo.hn/nota.php?nid=54941&sec=12 3085# It mentions executive decree 18-2006. 3086 3087# From Steffen Thorsen (2006-08-17): 3088# Honduras will observe DST from 2007 to 2009, exact dates are not 3089# published, I have located this authoritative source: 3090# http://www.presidencia.gob.hn/noticia.aspx?nId=47 3091 3092# From Steffen Thorsen (2007-03-30): 3093# http://www.laprensahn.com/pais_nota.php?id04962=7386 3094# So it seems that Honduras will not enter DST this year.... 3095 3096# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3097Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3098Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 3099Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3100Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3101# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3102Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3103 -6:00 Hond C%sT 3104# 3105# Great Swan I ceded by US to Honduras in 1972 3106 3107# Jamaica 3108# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3109# unspecified official document, and says "This time is used throughout the 3110# island". Go with Milne. Round to the nearest second as required by zic. 3111# 3112# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3113# Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3114# Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3115# Manley's supporters associated this act with Manley's nickname "Joshua" 3116# (recall that in the Bible the sun stood still at Joshua's request), 3117# and with the Rod of Correction which Manley said he had received from 3118# Haile Selassie, Emperor of Ethiopia. See: 3119# Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3120# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3121# 3122# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3123Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3124 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3125 -5:00 - EST 1974 3126 -5:00 US E%sT 1984 3127 -5:00 - EST 3128 3129# Martinique 3130# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3131Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3132 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3133 -4:00 - AST 1980 Apr 6 3134 -4:00 1:00 ADT 1980 Sep 28 3135 -4:00 - AST 3136 3137# Montserrat 3138# See America/Port_of_Spain. 3139 3140# Nicaragua 3141# 3142# This uses Shanks & Pottenger for times before 2005. 3143# 3144# From Steffen Thorsen (2005-04-12): 3145# I've got reports from 8 different people that Nicaragua just started 3146# DST on Sunday 2005-04-10, in order to save energy because of 3147# expensive petroleum. The exact end date for DST is not yet 3148# announced, only "September" but some sites also say "mid-September". 3149# Some background information is available on the President's official site: 3150# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3151# The Decree, no 23-2005 is available here: 3152# 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 3153# 3154# From Paul Eggert (2005-05-01): 3155# The decree doesn't say anything about daylight saving, but for now let's 3156# assume that it is daylight saving.... 3157# 3158# From Gwillim Law (2005-04-21): 3159# The Associated Press story on the time change, which can be found at 3160# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3161# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3162# time that a change of clocks was applied to save energy was in the year 2000 3163# during the Arnoldo Alem��n administration."... 3164# The northamerica file says that Nicaragua has been on UTC-6 continuously 3165# since December 1998. I wasn't able to find any details of Nicaraguan time 3166# changes in 2000. Perhaps a note could be added to the northamerica file, to 3167# the effect that we have indirect evidence that DST was observed in 2000. 3168# 3169# From Jesper N��rgaard Welen (2005-11-02): 3170# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3171# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3172# (2005-09-26) 3173# 3174# From Jesper N��rgaard Welen (2006-05-05): 3175# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3176# (my informal translation) 3177# By order of the president of the republic, Enrique Bola��os, Nicaragua 3178# advanced by sixty minutes their official time, yesterday at 2 in the 3179# morning, and will stay that way until 30th of September. 3180# 3181# From Jesper N��rgaard Welen (2006-09-30): 3182# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3183# My informal translation runs: 3184# The natural sun time is restored in all the national territory, in that the 3185# time is returned one hour at 01:00 am of October 1 of 2006. 3186# 3187# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3188Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3189Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3190Rule Nic 2005 only - Apr 10 0:00 1:00 D 3191Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3192Rule Nic 2006 only - Apr 30 2:00 1:00 D 3193Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3194# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3195Zone America/Managua -5:45:08 - LMT 1890 3196 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3197 -6:00 - CST 1973 May 3198 -5:00 - EST 1975 Feb 16 3199 -6:00 Nic C%sT 1992 Jan 1 4:00 3200 -5:00 - EST 1992 Sep 24 3201 -6:00 - CST 1993 3202 -5:00 - EST 1997 3203 -6:00 Nic C%sT 3204 3205# Panama 3206# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3207Zone America/Panama -5:18:08 - LMT 1890 3208 -5:19:36 - CMT 1908 Apr 22 # Col��n Mean Time 3209 -5:00 - EST 3210Link America/Panama America/Cayman 3211 3212# Puerto Rico 3213# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3214# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3215Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3216 -4:00 - AST 1942 May 3 3217 -4:00 US A%sT 1946 3218 -4:00 - AST 3219 3220# St Kitts-Nevis 3221# St Lucia 3222# See America/Port_of_Spain. 3223 3224# St Pierre and Miquelon 3225# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3226# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3227Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3228 -4:00 - AST 1980 May 3229 -3:00 - PMST 1987 # Pierre & Miquelon Time 3230 -3:00 Canada PM%sT 3231 3232# St Vincent and the Grenadines 3233# See America/Port_of_Spain. 3234 3235# Turks and Caicos 3236# 3237# From Chris Dunn in 3238# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 3239# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3240# daylight saving dates for time changes have been adjusted to match 3241# the recent U.S. change of dates. 3242# 3243# From Brian Inglis (2007-04-28): 3244# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3245# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3246# rows before that there is an out of date entry for Oct: 3247# "Eastern Standard Times Begins 2007 3248# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3249# indicating that the normal ET rules are followed. 3250# 3251# From Paul Eggert (2014-08-19): 3252# The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See: 3253# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3254# Model this as a switch from EST/EDT to AST ... 3255# From Chris Walton (2014-11-04): 3256# ... the TCI government appears to have delayed the switch to 3257# "permanent daylight saving time" by one year.... 3258# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3259# 3260# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3261Zone America/Grand_Turk -4:44:32 - LMT 1890 3262 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3263 -5:00 - EST 1979 3264 -5:00 US E%sT 2015 Nov Sun>=1 2:00 3265 -4:00 - AST 3266 3267# British Virgin Is 3268# Virgin Is 3269# See America/Port_of_Spain. 3270 3271 3272# Local Variables: 3273# coding: utf-8 3274# End: 3275