northamerica revision 187588
1187588Sedwin# @(#)northamerica 8.26 2153761Swollman# <pre> 3153761Swollman 42742Swollman# also includes Central America and the Caribbean 52742Swollman 62742Swollman# This data is by no means authoritative; if you think you know better, 72742Swollman# go ahead and edit the file (and please send any changes to 82742Swollman# tz@elsie.nci.nih.gov for general use in the future). 92742Swollman 10149514Swollman# From Paul Eggert (1999-03-22): 112742Swollman# A reliable and entertaining source about time zones is 1258787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 132742Swollman 142742Swollman############################################################################### 152742Swollman 162742Swollman# United States 172742Swollman 1858787Sru# From Paul Eggert (1999-03-31): 1958787Sru# Howse writes (pp 121-125) that time zones were invented by 2058787Sru# Professor Charles Ferdinand Dowd (1825-1904), 2158787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 2258787Sru# His pamphlet ``A System of National Time for Railroads'' (1870) 2358787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2458787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2558787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2658787Sru# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 2758787Sru# and the most of the country soon followed suit. 2858787Sru 29149514Swollman# From Paul Eggert (2005-04-16): 30149514Swollman# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 31149514Swollman# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 32149514Swollman 33158421Swollman# From Paul Eggert (2006-03-22): 3414343Swollman# A good source for time zone historical data in the US is 3514343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 3614343Swollman# San Diego: ACS Publications, Inc. (1991). 3714343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 38158421Swollman# It is the source for most of the pre-1991 US entries below. 3914343Swollman 4075267Swollman# From Paul Eggert (2001-03-06): 4117200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 4275267Swollman# in his whimsical essay ``An Economical Project for Diminishing the Cost 4375267Swollman# of Light'' published in the Journal de Paris (1784-04-26). 4417200Swollman# Not everyone is happy with the results: 4517200Swollman# 4617200Swollman# I don't really care how time is reckoned so long as there is some 4717200Swollman# agreement about it, but I object to being told that I am saving 4817200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 4917200Swollman# I even object to the implication that I am wasting something 5017200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 5117200Swollman# of moonlight I resent the bossy insistence of those who want to 5217200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 5317200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 5417200Swollman# to push people into bed earlier, and get them up earlier, to make 5517200Swollman# them healthy, wealthy and wise in spite of themselves. 5617200Swollman# 57149514Swollman# -- Robertson Davies, The diary of Samuel Marchbanks, 58149514Swollman# Clarke, Irwin (1947), XIX, Sunday 5975267Swollman# 6075267Swollman# For more about the first ten years of DST in the United States, see 6175267Swollman# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 6275267Swollman# Ten years of daylight saving from the Pittsburgh standpoint 6375267Swollman# (Carnegie Library of Pittsburgh, 1927)</a>. 6475267Swollman# 6575267Swollman# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 6675267Swollman# However, DST was imposed by the Standard Time Act of 1918, which 6775267Swollman# was the first nationwide legal time standard, and apparently 6875267Swollman# time was just called "Standard Time" or "Daylight Saving Time". 6917200Swollman 702742Swollman# From Arthur David Olson: 712742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 7219878Swollman# See, for example, the front page of the Saturday, 1974-10-26 7319878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 742742Swollman 752742Swollman# From Arthur David Olson: 762742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 772742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 782742Swollman 7967578Swollman# From Arthur David Olson (2000-09-25): 8067578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 8167578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 8267578Swollman# An AltaVista search turned up 8367578Swollman# <a href="http://rowayton.org/rhs/hstaug45.html">: 8467578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 8567578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 8667578Swollman# </a> (August 1945) by way of confirmation. 8767578Swollman 88149514Swollman# From Joseph Gallant citing 8967578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 9067578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 9186222Swollman# to switch to London for Attlee's address, but the American people 9267578Swollman# never got to hear his speech live. According to one press account, 9367578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 9467578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 9567578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 9686222Swollman# London which were to precede Mr. Attlee's speech. 9767578Swollman 98114173Swollman# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 99114173Swollman# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 100114173Swollman# 101114173Swollman# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 102114173Swollman# Any announcement from Asia would reach St. John's New York newsroom on a 103114173Swollman# wire service teletype machine, which had prescribed signals for major news. 104114173Swollman# Associated Press, for example, would ring five bells before spewing out 105114173Swollman# typed copy of an important story, and 10 bells for news "of transcendental 106114173Swollman# importance." 107114173Swollman# 108114173Swollman# On Aug. 14, stalling while talking steadily into the NBC networks' open 109114173Swollman# microphone, St. John heard five bells and waited only to hear a sixth bell, 110114173Swollman# before announcing confidently: "Ladies and gentlemen, World War II is over. 111114173Swollman# The Japanese have agreed to our surrender terms." 112114173Swollman# 113114173Swollman# He had scored a 20-second scoop on other broadcasters. 114114173Swollman 115149590Swollman# From Arthur David Olson (2005-08-22): 116149590Swollman# Paul has been careful to use the "US" rules only in those locations 117149590Swollman# that are part of the United States; this reflects the real scope of 118149590Swollman# U.S. government action. So even though the "US" rules have changed 119149590Swollman# in the latest release, other countries won't be affected. 120149590Swollman 1212742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 12275267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1232742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 1242742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 12567578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 1262742SwollmanRule US 1945 only - Sep 30 2:00 0 S 127149514SwollmanRule US 1967 2006 - Oct lastSun 2:00 0 S 1282742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1292742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1302742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1312742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 132149514SwollmanRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 133149514SwollmanRule US 2007 max - Mar Sun>=8 2:00 1:00 D 134149514SwollmanRule US 2007 max - Nov Sun>=1 2:00 0 S 1352742Swollman 136153761Swollman# From Arthur David Olson, 2005-12-19 137153761Swollman# We generate the files specified below to guard against old files with 138153761Swollman# obsolete information being left in the time zone binary directory. 139153761Swollman# We limit the list to names that have appeared in previous versions of 140153761Swollman# this time zone package. 141153761Swollman# We do these as separate Zones rather than as Links to avoid problems if 142153761Swollman# a particular place changes whether it observes DST. 143153761Swollman# We put these specifications here in the northamerica file both to 144153761Swollman# increase the chances that they'll actually get compiled and to 145153761Swollman# avoid the need to duplicate the US rules in another file. 146153761Swollman 147153761Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 148153761SwollmanZone EST -5:00 - EST 149153761SwollmanZone MST -7:00 - MST 150153761SwollmanZone HST -10:00 - HST 151153761SwollmanZone EST5EDT -5:00 US E%sT 152153761SwollmanZone CST6CDT -6:00 US C%sT 153153761SwollmanZone MST7MDT -7:00 US M%sT 154153761SwollmanZone PST8PDT -8:00 US P%sT 155153761Swollman 15619878Swollman# From Bob Devine (1988-01-28): 1572742Swollman# ...Alaska (and Hawaii) had the timezone names changed in 1967. 1582742Swollman# old new 1592742Swollman# Pacific Standard Time(PST) -same- 1602742Swollman# Yukon Standard Time(YST) -same- 1612742Swollman# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 1622742Swollman# Nome Standard Time (NT) Bering Standard Time (BST) 1632742Swollman# 1642742Swollman# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 1652742Swollman# The YST zone now covers nearly all of the state, AHST just part 1662742Swollman# of the Aleutian islands. No DST. 1672742Swollman 16814343Swollman# From Paul Eggert (1995-12-19): 16914343Swollman# The tables below use `NST', not `NT', for Nome Standard Time. 17014343Swollman# I invented `CAWT' for Central Alaska War Time. 17114343Swollman 17219878Swollman# From U. S. Naval Observatory (1989-01-19): 1732742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1742742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1752742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1762742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1772742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1782742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1792742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1802742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1812742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1822742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1832742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 1842742Swollman# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 1852742Swollman# USA HAWAII 10 H BEHIND UTC 1862742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 1872742Swollman 18819878Swollman# From Arthur David Olson (1989-01-21): 1892742Swollman# The above dates are for 1988. 1902742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 1912742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 1922742Swollman# Aleutians. 1932742Swollman 19419878Swollman# From Arthur David Olson (1988-02-13): 1952742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 1962742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 19719878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 1982742Swollman# took effect), as explained in sections 263 and 261: 1992742Swollman# (none) 2002742Swollman# United States standard eastern time 2012742Swollman# United States standard mountain time 2022742Swollman# United States standard central time 2032742Swollman# United States standard Pacific time 2042742Swollman# (none) 2052742Swollman# United States standard Alaska time 2062742Swollman# (none) 20719878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 2082742Swollman# public law 98-181): 2092742Swollman# Atlantic standard time 2102742Swollman# eastern standard time 2112742Swollman# central standard time 2122742Swollman# mountain standard time 2132742Swollman# Pacific standard time 2142742Swollman# Yukon standard time 2152742Swollman# Alaska-Hawaii standard time 2162742Swollman# Bering standard time 21719878Swollman# And after 1983-11-30: 2182742Swollman# Atlantic standard time 2192742Swollman# eastern standard time 2202742Swollman# central standard time 2212742Swollman# mountain standard time 2222742Swollman# Pacific standard time 2232742Swollman# Alaska standard time 2242742Swollman# Hawaii-Aleutian standard time 2252742Swollman# Samoa standard time 2262742Swollman# The law doesn't give abbreviations. 22714343Swollman# 22875267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 22975267Swollman# Public law 106-564 (2000-12-23) introduced the abbreviation 23075267Swollman# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 23175267Swollman# See the file "australasia". 232158421Swollman 233149514Swollman# From Arthur David Olson, 2005-08-09 234149514Swollman# The following was signed into law on 2005-08-08. 235149514Swollman# 236149514Swollman# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 237149514Swollman# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 238149514Swollman# U.S.C. 260a(a)) is amended-- 239149514Swollman# (1) by striking `first Sunday of April' and inserting `second 240149514Swollman# Sunday of March'; and 241149514Swollman# (2) by striking `last Sunday of October' and inserting `first 242149514Swollman# Sunday of November'. 243149514Swollman# (b) Effective Date- Subsection (a) shall take effect 1 year after the 244149514Swollman# date of enactment of this Act or March 1, 2007, whichever is later. 245149514Swollman# (c) Report to Congress- Not later than 9 months after the effective 246149514Swollman# date stated in subsection (b), the Secretary shall report to Congress 247149514Swollman# on the impact of this section on energy consumption in the United 248149514Swollman# States. 249149514Swollman# (d) Right to Revert- Congress retains the right to revert the 250149514Swollman# Daylight Saving Time back to the 2005 time schedules once the 251149514Swollman# Department study is complete. 2522742Swollman 25386222Swollman# US eastern time, represented by New York 25475267Swollman 25567578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 256149590Swollman# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 257149590Swollman# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 258114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 259114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 260114173Swollman# Vermont, Virginia, West Virginia 26167578Swollman 262149514Swollman# From Dave Cantor (2004-11-02): 263149514Swollman# Early this summer I had the occasion to visit the Mount Washington 264149514Swollman# Observatory weather station atop (of course!) Mount Washington [, NH].... 265149514Swollman# One of the staff members said that the station was on Eastern Standard Time 266149514Swollman# and didn't change their clocks for Daylight Saving ... so that their 267149514Swollman# reports will always have times which are 5 hours behind UTC. 268149514Swollman 269153670Swollman# From Paul Eggert (2005-08-26): 270153670Swollman# According to today's Huntsville Times 271153670Swollman# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 272153670Swollman# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 273153670Swollman# in Russell County, Lanett in Chambers County and some towns in Lee County, 274153670Swollman# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 275153670Swollman# Roberts, city administrator in Phenix City. as saying "We are in the Central 276153670Swollman# time zone, but we do go by the Eastern time zone because so many people work 277158421Swollman# in Columbus." 278153670Swollman 27914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 28014343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 28114343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 28214343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 28314343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 28414343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 28514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 286149514SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 28714343Swollman -5:00 US E%sT 1920 28814343Swollman -5:00 NYC E%sT 1942 28914343Swollman -5:00 US E%sT 1946 29014343Swollman -5:00 NYC E%sT 1967 29114343Swollman -5:00 US E%sT 2922742Swollman 29386222Swollman# US central time, represented by Chicago 29467578Swollman 295136638Swollman# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 296136638Swollman# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 297136638Swollman# Washington counties), Illinois, western Indiana 298114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 299114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 300114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 301114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 302114173Swollman# western Tennessee, most of Texas, Wisconsin 30367578Swollman 304158421Swollman# From Larry M. Smith (2006-04-26) re Wisconsin: 305158421Swollman# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 306158421Swollman# is currently enforced at the 01:00 time of change. Because the local 307158421Swollman# "bar time" in the state corresponds to 02:00, a number of citations 308158421Swollman# are issued for the "sale of class 'B' alcohol after prohibited 309158421Swollman# hours" within the deviated hour of this change every year.... 310169811Swollman# 311169811Swollman# From Douglas R. Bomberg (2007-03-12): 312169811Swollman# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 313169811Swollman# Statue 175 closer in synch with the US Congress' intent.... 314169811Swollman# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 315158421Swollman 31614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 31714343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 31814343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 31914343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 32014343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 32114343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 32214343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 32314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 324149514SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 32514343Swollman -6:00 US C%sT 1920 32614343Swollman -6:00 Chicago C%sT 1936 Mar 1 2:00 32714343Swollman -5:00 - EST 1936 Nov 15 2:00 32814343Swollman -6:00 Chicago C%sT 1942 32914343Swollman -6:00 US C%sT 1946 33014343Swollman -6:00 Chicago C%sT 1967 33114343Swollman -6:00 US C%sT 33286222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 333149514SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 33486222Swollman -7:00 US M%sT 1992 Oct 25 02:00 33586222Swollman -6:00 US C%sT 336158421Swollman# Morton County, ND, switched from mountain to central time on 337158421Swollman# 2003-10-26, except for the area around Mandan which was already central time. 338158421Swollman# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 339158421Swollman# Officially this switch also included part of Sioux County, and 340158421Swollman# Jones, Mellette, and Todd Counties in South Dakota; 341158421Swollman# but in practice these other counties were already observing central time. 342158421Swollman# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 343158421SwollmanZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 344158421Swollman -7:00 US M%sT 2003 Oct 26 02:00 345158421Swollman -6:00 US C%sT 3462742Swollman 34786222Swollman# US mountain time, represented by Denver 34867578Swollman# 349136638Swollman# Colorado, far western Kansas, Montana, western 35086222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 351171948Sedwin# New Mexico, southwestern North Dakota, 35275267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 35375267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 35467578Swollman# 35514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 35614343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 35714343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 35814343SwollmanRule Denver 1921 only - May 22 2:00 0 S 35914343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 36014343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 3612742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 362149514SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 36315309Swollman -7:00 US M%sT 1920 36415309Swollman -7:00 Denver M%sT 1942 36515309Swollman -7:00 US M%sT 1946 36615309Swollman -7:00 Denver M%sT 1967 36715309Swollman -7:00 US M%sT 3682742Swollman 36914343Swollman# US Pacific time, represented by Los Angeles 37067578Swollman# 371136638Swollman# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 372171948Sedwin# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, 373171948Sedwin# and the northern three-quarters of Idaho county), 374136638Swollman# most of Nevada, most of Oregon, and Washington 37567578Swollman# 37614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 37714343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 37814343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 37914343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 38014343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 38114343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 38214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 383149514SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 38414343Swollman -8:00 US P%sT 1946 38514343Swollman -8:00 CA P%sT 1967 38614343Swollman -8:00 US P%sT 3878029Swollman 38814343Swollman# Alaska 38914343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 39014343Swollman# 39186222Swollman# From Paul Eggert (2001-05-30): 39214343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 39319878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 39475267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 39575267Swollman# also a Friday. Include only the time zone part of this transition, 39675267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 39775267Swollman# the Julian calendar. 39814343Swollman# 39986222Swollman# As far as we know, none of the exact locations mentioned below were 40086222Swollman# permanently inhabited in 1867 by anyone using either calendar. 40186222Swollman# (Yakutat was colonized by the Russians in 1799, but the settlement 40286222Swollman# was destroyed in 1805 by a Yakutat-kon war party.) However, there 40386222Swollman# were nearby inhabitants in some cases and for our purposes perhaps 40486222Swollman# it's best to simply use the official transition. 40586222Swollman# 40614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 40775267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 40875267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 40914343Swollman -8:00 - PST 1942 41014343Swollman -8:00 US P%sT 1946 41114343Swollman -8:00 - PST 1969 41214343Swollman -8:00 US P%sT 1983 Oct 30 2:00 413136638Swollman -9:00 US Y%sT 1983 Nov 30 41414343Swollman -9:00 US AK%sT 41575267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 41675267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 41714343Swollman -9:00 - YST 1942 41814343Swollman -9:00 US Y%sT 1946 41914343Swollman -9:00 - YST 1969 420136638Swollman -9:00 US Y%sT 1983 Nov 30 42114343Swollman -9:00 US AK%sT 42275267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 42375267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 42414343Swollman -10:00 - CAT 1942 425158421Swollman -10:00 US CAT/CAWT 1945 Aug 14 23:00u 426158421Swollman -10:00 US CAT/CAPT 1946 # Peace 42714343Swollman -10:00 - CAT 1967 Apr 42814343Swollman -10:00 - AHST 1969 42914343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 430136638Swollman -9:00 US Y%sT 1983 Nov 30 43114343Swollman -9:00 US AK%sT 43275267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 43375267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 43414343Swollman -11:00 - NST 1942 43514343Swollman -11:00 US N%sT 1946 43614343Swollman -11:00 - NST 1967 Apr 43714343Swollman -11:00 - BST 1969 43814343Swollman -11:00 US B%sT 1983 Oct 30 2:00 439136638Swollman -9:00 US Y%sT 1983 Nov 30 44014343Swollman -9:00 US AK%sT 44175267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 44275267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 44314343Swollman -11:00 - NST 1942 44414343Swollman -11:00 US N%sT 1946 44514343Swollman -11:00 - NST 1967 Apr 44614343Swollman -11:00 - BST 1969 44714343Swollman -11:00 US B%sT 1983 Oct 30 2:00 448136638Swollman -10:00 US AH%sT 1983 Nov 30 44914343Swollman -10:00 US HA%sT 450149514Swollman# The following switches don't quite make our 1970 cutoff. 451149514Swollman# 45214343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 45314343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 45414343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 455149514Swollman# 456149514Swollman# From David Flater (2004-11-09): 457149514Swollman# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 458149514Swollman# Historic Preservation Commission, provided this information, which 459149514Swollman# suggests that Unalaska deviated from statutory time from early 1967 460149514Swollman# possibly until 1983: 461149514Swollman# 462149514Swollman# Minutes of the Unalaska City Council Meeting, January 10, 1967: 463149514Swollman# "Except for St. Paul and Akutan, Unalaska is the only important 464149514Swollman# location not on Alaska Standard Time. The following resolution was 465149514Swollman# made by William Robinson and seconded by Henry Swanson: Be it 466149514Swollman# resolved that the City of Unalaska hereby goes to Alaska Standard 467149514Swollman# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 468149514Swollman# January 14, Alaska Standard Time.) This resolution was passed with 469149514Swollman# three votes for and one against." 4702742Swollman 47114343Swollman# Hawaii 47214343Swollman# 47314343Swollman# From Arthur David Olson: 47414343Swollman# And then there's Hawaii. 47514343Swollman# DST was observed for one day in 1933; 47614343Swollman# standard time was changed by half an hour in 1947; 47714343Swollman# it's always standard as of 1986. 47814343Swollman# 47914343Swollman# From Paul Eggert: 48014343Swollman# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks. 48114343Swollman# 48214343SwollmanZone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 48314343Swollman -10:30 - HST 1933 Apr 30 2:00 48414343Swollman -10:30 1:00 HDT 1933 May 21 2:00 48514343Swollman -10:30 US H%sT 1947 Jun 8 2:00 48614343Swollman -10:00 - HST 4872742Swollman 48814343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 48914343Swollman 49014343Swollman# Arizona mostly uses MST. 491114173Swollman 492114173Swollman# From Paul Eggert (2002-10-20): 493114173Swollman# 494114173Swollman# The information in the rest of this paragraph is derived from the 495114173Swollman# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 496114173Swollman# Daylight Saving Time web page (2002-01-23)</a> maintained by the 497114173Swollman# Arizona State Library, Archives and Public Records. 498114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 499114173Swollman# time, but by federal law railroads, airlines, bus lines, military 500114173Swollman# personnel, and some engaged in interstate commerce continued to 501114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 502114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 503114173Swollman# the date the state's clocks would change. In 1945 the State of 504114173Swollman# Arizona used standard time all year, again with exceptions only as 505114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 506114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 507114173Swollman# 508114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 509114173Swollman# Go with the Arizona State Library instead. 510114173Swollman 511149514SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 51214343Swollman -7:00 US M%sT 1944 Jan 1 00:01 513114173Swollman -7:00 - MST 1944 Apr 1 00:01 51414343Swollman -7:00 US M%sT 1944 Oct 1 00:01 51514343Swollman -7:00 - MST 1967 516114173Swollman -7:00 US M%sT 1968 Mar 21 51714343Swollman -7:00 - MST 51819878Swollman# From Arthur David Olson (1988-02-13): 51914343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 520136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 5212742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 5222742Swollman# large size and location in three states." (The "only" means that other 5232742Swollman# tribal nations don't use DST.) 5242742Swollman 52514343SwollmanLink America/Denver America/Shiprock 5262742Swollman 527136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 528136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 529136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 530136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 531171948Sedwin# Teton, Twin Falls, Valley, Washington counties, and the southern 532171948Sedwin# quarter of Idaho county) and eastern Oregon (most of Malheur County) 533136638Swollman# switched four weeks late in 1974. 534149514Swollman# 53514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 536149514SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 53714343Swollman -8:00 US P%sT 1923 May 13 2:00 53814343Swollman -7:00 US M%sT 1974 53914343Swollman -7:00 - MST 1974 Feb 3 2:00 54014343Swollman -7:00 US M%sT 5412742Swollman 54214343Swollman# Indiana 54314343Swollman# 54458787Sru# For a map of Indiana's time zone regions, see: 54558787Sru# <a href="http://www.mccsc.edu/time.html"> 54658787Sru# What time is it in Indiana? 547158421Swollman# </a> (2006-03-01) 54858787Sru# 549171948Sedwin# From Paul Eggert (2007-08-17): 550149590Swollman# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 551149590Swollman# with the following exceptions: 552149590Swollman# 553149590Swollman# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 554149590Swollman# Vandenburgh, and Warrick counties have been like America/Chicago. 555149590Swollman# 556149590Swollman# - Dearborn and Ohio counties have been like America/New_York. 557149590Swollman# 558149590Swollman# - Clark, Floyd, and Harrison counties have been like 559149590Swollman# America/Kentucky/Louisville. 560149590Swollman# 561171948Sedwin# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 562171948Sedwin# and Switzerland counties have their own time zone histories as noted below. 563158421Swollman# 564158421Swollman# Shanks partitioned Indiana into 345 regions, each with its own time history, 565158421Swollman# and wrote ``Even newspaper reports present contradictory information.'' 566158421Swollman# Those Hoosiers! Such a flighty and changeable people! 56714343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 56814343Swollman# 56914343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 57014343Swollman# that they would be ambiguous if we left them at the `America' level. 57114343Swollman# So we reluctantly put them all in a subdirectory `America/Indiana'. 57275267Swollman 573149514Swollman# From Paul Eggert (2005-08-16): 574158421Swollman# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 57575267Swollman 576158421Swollman# From Nathan Stratton Treadway (2006-03-30): 577158421Swollman# http://www.dot.gov/affairs/dot0406.htm [3705 B] 578158421Swollman# From Deborah Goldsmith (2006-01-18): 579158421Swollman# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 580158421Swollman# From Paul Eggert (2006-01-20): 581158421Swollman# It says "DOT is relocating the time zone boundary in Indiana to move Starke, 582158421Swollman# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 583158421Swollman# Eastern Time Zone to the Central Time Zone.... The effective date of 584158421Swollman# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 585158421Swollman# changeover date from standard time to Daylight Saving Time." 586158421Swollman# Strictly speaking, this means the affected counties will change their 587158421Swollman# clocks twice that night, but this obviously is in error. The intent 588158421Swollman# is that 01:59:59 EST be followed by 02:00:00 CDT. 589158421Swollman 590169811Swollman# From Gwillim Law (2007-02-10): 591169811Swollman# The Associated Press has been reporting that Pulaski County, Indiana is 592169811Swollman# going to switch from Central to Eastern Time on March 11, 2007.... 593169811Swollman# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 594169811Swollman 59514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 59614343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 59714343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 59814343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 59914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 600149514SwollmanZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 60114343Swollman -6:00 US C%sT 1920 60214343Swollman -6:00 Indianapolis C%sT 1942 60314343Swollman -6:00 US C%sT 1946 60414343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 60514343Swollman -5:00 - EST 1957 Sep 29 2:00 60614343Swollman -6:00 - CST 1958 Apr 27 2:00 60714343Swollman -5:00 - EST 1969 60814343Swollman -5:00 US E%sT 1971 609149514Swollman -5:00 - EST 2006 610149514Swollman -5:00 US E%sT 6112742Swollman# 612158421Swollman# Eastern Crawford County, Indiana, left its clocks alone in 1974, 613158421Swollman# as well as from 1976 through 2005. 61414343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 61514343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 61614343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 61714343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 61814343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 61914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 620149514SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 62114343Swollman -6:00 US C%sT 1951 62214343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 62314343Swollman -5:00 - EST 1969 62414343Swollman -5:00 US E%sT 1974 Jan 6 2:00 62514343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 62614343Swollman -5:00 US E%sT 1976 627149514Swollman -5:00 - EST 2006 628149514Swollman -5:00 US E%sT 62914343Swollman# 630171948Sedwin# Daviess, Dubois, Knox, and Martin Counties, Indiana, 631171948Sedwin# switched from eastern to central time in April 2006, then switched back 632171948Sedwin# in November 2007. 633158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 634158421SwollmanRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 635158421SwollmanRule Vincennes 1946 only - Sep lastSun 2:00 0 S 636158421SwollmanRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 637158421SwollmanRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 638158421SwollmanRule Vincennes 1955 only - May 1 0:00 1:00 D 639158421SwollmanRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 640158421SwollmanRule Vincennes 1960 only - Oct lastSun 2:00 0 S 641158421SwollmanRule Vincennes 1961 only - Sep lastSun 2:00 0 S 642158421SwollmanRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 643158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 644158421SwollmanZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 645158421Swollman -6:00 US C%sT 1946 646158421Swollman -6:00 Vincennes C%sT 1964 Apr 26 2:00 647158421Swollman -5:00 - EST 1969 648158421Swollman -5:00 US E%sT 1971 649158421Swollman -5:00 - EST 2006 Apr 2 2:00 650171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 651171948Sedwin -5:00 US E%sT 652171948Sedwin# 653171948Sedwin# Perry County, Indiana, switched from eastern to central time in April 2006. 654171948Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 655171948SedwinRule Perry 1946 only - Apr lastSun 2:00 1:00 D 656171948SedwinRule Perry 1946 only - Sep lastSun 2:00 0 S 657171948SedwinRule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 658171948SedwinRule Perry 1953 1959 - Sep lastSun 2:00 0 S 659171948SedwinRule Perry 1955 only - May 1 0:00 1:00 D 660171948SedwinRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 661171948SedwinRule Perry 1960 only - Oct lastSun 2:00 0 S 662171948SedwinRule Perry 1961 only - Sep lastSun 2:00 0 S 663171948SedwinRule Perry 1962 1963 - Oct lastSun 2:00 0 S 664171948Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 665171948SedwinZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 666171948Sedwin -6:00 US C%sT 1946 667171948Sedwin -6:00 Perry C%sT 1964 Apr 26 2:00 668171948Sedwin -5:00 - EST 1969 669171948Sedwin -5:00 US E%sT 1971 670171948Sedwin -5:00 - EST 2006 Apr 2 2:00 671158421Swollman -6:00 US C%sT 672158421Swollman# 673158421Swollman# Pike County, Indiana moved from central to eastern time in 1977, 674171948Sedwin# then switched back in 2006, then switched back again in 2007. 675158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 676158421SwollmanRule Pike 1955 only - May 1 0:00 1:00 D 677158421SwollmanRule Pike 1955 1960 - Sep lastSun 2:00 0 S 678158421SwollmanRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 679158421SwollmanRule Pike 1961 1964 - Oct lastSun 2:00 0 S 680158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 681158421SwollmanZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 682158421Swollman -6:00 US C%sT 1955 683158421Swollman -6:00 Pike C%sT 1965 Apr 25 2:00 684158421Swollman -5:00 - EST 1966 Oct 30 2:00 685158421Swollman -6:00 US C%sT 1977 Oct 30 2:00 686158421Swollman -5:00 - EST 2006 Apr 2 2:00 687171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 688171948Sedwin -5:00 US E%sT 689158421Swollman# 690158421Swollman# Starke County, Indiana moved from central to eastern time in 1991, 691158421Swollman# then switched back in 2006. 69219878Swollman# From Arthur David Olson (1991-10-28): 69319878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 69414343Swollman# notes that Starke County switched from Central time to Eastern time as of 69519878Swollman# 1991-10-27. 69614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 69714343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 69814343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 69914343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 70014343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 70114343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 70214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 703149514SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 70414343Swollman -6:00 US C%sT 1947 70514343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 70614343Swollman -5:00 - EST 1963 Oct 27 2:00 70714343Swollman -6:00 US C%sT 1991 Oct 27 2:00 708158421Swollman -5:00 - EST 2006 Apr 2 2:00 709158421Swollman -6:00 US C%sT 71014343Swollman# 711169811Swollman# Pulaski County, Indiana, switched from eastern to central time in 712169811Swollman# April 2006 and then switched back in March 2007. 713169811Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 714169811SwollmanRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 715169811SwollmanRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 716169811SwollmanRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 717169811SwollmanRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 718169811Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 719169811SwollmanZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 720169811Swollman -6:00 US C%sT 1946 721169811Swollman -6:00 Pulaski C%sT 1961 Apr 30 2:00 722169811Swollman -5:00 - EST 1969 723169811Swollman -5:00 US E%sT 1971 724169811Swollman -5:00 - EST 2006 Apr 2 2:00 725169811Swollman -6:00 US C%sT 2007 Mar 11 2:00 726169811Swollman -5:00 US E%sT 727169811Swollman# 728158421Swollman# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 72914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 730149514SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 73114343Swollman -6:00 US C%sT 1954 Apr 25 2:00 73214343Swollman -5:00 - EST 1969 73314343Swollman -5:00 US E%sT 1973 734149514Swollman -5:00 - EST 2006 735149514Swollman -5:00 US E%sT 7362742Swollman 73714343Swollman# Part of Kentucky left its clocks alone in 1974. 738149590Swollman# This also includes Clark, Floyd, and Harrison counties in Indiana. 73914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 74014343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 74114343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 74214343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 74314343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 74414343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 74514343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 74614343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 74714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 748149514SwollmanZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 74914343Swollman -6:00 US C%sT 1921 75014343Swollman -6:00 Louisville C%sT 1942 75114343Swollman -6:00 US C%sT 1946 75214343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 75314343Swollman -5:00 - EST 1968 75414343Swollman -5:00 US E%sT 1974 Jan 6 2:00 75514343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 75614343Swollman -5:00 US E%sT 75767578Swollman# 758158421Swollman# Wayne County, Kentucky 75958787Sru# 76058787Sru# From 76158787Sru# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 76258787Sru# Lake Cumberland LIFE 76358787Sru# </a> (1999-01-29) via WKYM-101.7: 76458787Sru# Clinton County has joined Wayne County in asking the DoT to change from 76558787Sru# the Central to the Eastern time zone.... The Wayne County government made 76658787Sru# the same request in December. And while Russell County officials have not 76758787Sru# taken action, the majority of respondents to a poll conducted there in 76858787Sru# August indicated they would like to change to "fast time" also. 76958787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 77058787Sru# location in the Central time zone. 77167578Swollman# 77267578Swollman# From Rich Wales (2000-08-29): 77367578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 77467578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 77575267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 77675267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 77786222Swollman# 77886222Swollman# From Paul Eggert (2001-07-16): 77986222Swollman# The final rule was published in the 78086222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 78186222Swollman# Federal Register 65, 160 (2000-08-17), page 50154-50158. 78286222Swollman# </a> 783114173Swollman# 784149514SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 78567578Swollman -6:00 US C%sT 1946 78667578Swollman -6:00 - CST 1968 78767578Swollman -6:00 US C%sT 2000 Oct 29 2:00 78867578Swollman -5:00 US E%sT 7892742Swollman 79067578Swollman 79167578Swollman# From Rives McDow (2000-08-30): 79267578Swollman# Here ... are all the changes in the US since 1985. 79367578Swollman# Kearny County, KS (put all of county on central; 79467578Swollman# previously split between MST and CST) ... 1990-10 79567578Swollman# Starke County, IN (from CST to EST) ... 1991-10 79667578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 79767578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 79867578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 79967578Swollman# 80086222Swollman# From Paul Eggert (2001-07-17): 80186222Swollman# We don't know where the line used to be within Kearny County, KS, 80286222Swollman# so omit that change for now. 80386222Swollman# See America/Indiana/Knox for the Starke County, IN change. 80486222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 80586222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 80686222Swollman# 1999-10-31. See the 80786222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 80886222Swollman# Federal Register 64, 203 (1999-10-21), page 56705-56707. 80986222Swollman# </a> 81086222Swollman# However, the Federal Register says that West Wendover already operated 81186222Swollman# on mountain time, and the rule merely made this official; 81286222Swollman# hence a separate tz entry is not needed. 81367578Swollman 81414343Swollman# Michigan 81514343Swollman# 81619878Swollman# From Bob Devine (1988-01-28): 81714343Swollman# Michigan didn't observe DST from 1968 to 1973. 81814343Swollman# 81958787Sru# From Paul Eggert (1999-03-31): 82058787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 82158787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 82258787Sru# that Detroit kept 82314343Swollman# 82414343Swollman# local time until 1900 when the City Council decreed that clocks should 82514343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 82614343Swollman# city obeyed, half refused. After considerable debate, the decision 82714343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 82814343Swollman# erect a sundial in front of the city hall was referred to the 82914343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 83014343Swollman# by city vote. 83114343Swollman# 83214343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 83314343Swollman# 83475267Swollman# From Paul Eggert (2001-03-06): 83575267Swollman# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 83675267Swollman# one hour in 1914.'' This change is not in Shanks. We have no more 83775267Swollman# info, so omit this for now. 83875267Swollman# 83914343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 84014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 84114343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 84214343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 84314343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 84414343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 84514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 84614343SwollmanZone America/Detroit -5:32:11 - LMT 1905 84714343Swollman -6:00 - CST 1915 May 15 2:00 84814343Swollman -5:00 - EST 1942 84914343Swollman -5:00 US E%sT 1946 85014343Swollman -5:00 Detroit E%sT 1973 85114343Swollman -5:00 US E%sT 1975 85214343Swollman -5:00 - EST 1975 Apr 27 2:00 85314343Swollman -5:00 US E%sT 85414343Swollman# 855158421Swollman# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 856158421Swollman# switched from EST to CST/CDT in 1973. 85714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 85814343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 85914343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 86014343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 86114343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 86214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 86314343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 86414343Swollman -6:00 US C%sT 1946 86514343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 86614343Swollman -5:00 - EST 1973 Apr 29 2:00 86714343Swollman -6:00 US C%sT 86814343Swollman 8692742Swollman# Navassa 87086222Swollman# administered by the US Fish and Wildlife Service 87143543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 87243543Swollman# also claimed by Haiti 87343543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 87486222Swollman# US lighthouse 1917/1996-09 87543543Swollman# currently uninhabited 87643543Swollman# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 87743543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 87843543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 87914343Swollman 8802742Swollman################################################################################ 8812742Swollman 8822742Swollman 883158421Swollman# From Paul Eggert (2006-03-22): 884158421Swollman# A good source for time zone historical data outside the U.S. is 885158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 886158421Swollman# San Diego: ACS Publications, Inc. (2003). 8872742Swollman# 88886222Swollman# Gwillim Law writes that a good source 88920094Swollman# for recent time zone data is the International Air Transport 89020094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 89120094Swollman# published semiannually. Law sent in several helpful summaries 89220094Swollman# of the IATA's data after 1990. 89320094Swollman# 894158421Swollman# Except where otherwise noted, Shanks & Pottenger is the source for 895158421Swollman# entries through 1990, and IATA SSIM is the source for entries afterwards. 89620094Swollman# 897121098Swollman# Other sources occasionally used include: 8982742Swollman# 899121098Swollman# Edward W. Whitman, World Time Differences, 900121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 901121098Swollman# which I found in the UCLA library. 902121098Swollman# 903121098Swollman# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 904121098Swollman# William Willett, The Waste of Daylight, 19th edition 905121098Swollman# </a> (1914-03) 906121098Swollman# 9079908Swollman# See the `europe' file for Greenland. 9082742Swollman 9092742Swollman# Canada 9102742Swollman 911149514Swollman# From Alain LaBont<e'> (1994-11-14): 9129908Swollman# I post here the time zone abbreviations standardized in Canada 9139908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 9149908Swollman# 9159908Swollman# UTC Standard time Daylight savings time 9169908Swollman# offset French English French English 9179908Swollman# -2:30 - - HAT NDT 9189908Swollman# -3 - - HAA ADT 9199908Swollman# -3:30 HNT NST - - 9209908Swollman# -4 HNA AST HAE EDT 9219908Swollman# -5 HNE EST HAC CDT 9229908Swollman# -6 HNC CST HAR MDT 9239908Swollman# -7 HNR MST HAP PDT 9249908Swollman# -8 HNP PST HAY YDT 9259908Swollman# -9 HNY YST - - 9269908Swollman# 9279908Swollman# HN: Heure Normale ST: Standard Time 9289908Swollman# HA: Heure Avanc<e'>e DT: Daylight saving Time 9299908Swollman# 9309908Swollman# A: de l'Atlantique Atlantic 9319908Swollman# C: du Centre Central 9329908Swollman# E: de l'Est Eastern 9339908Swollman# M: Mountain 9349908Swollman# N: Newfoundland 9359908Swollman# P: du Pacifique Pacific 9369908Swollman# R: des Rocheuses 9379908Swollman# T: de Terre-Neuve 9389908Swollman# Y: du Yukon Yukon 9399908Swollman# 940149514Swollman# From Paul Eggert (1994-11-22): 9419908Swollman# Alas, this sort of thing must be handled by localization software. 9422742Swollman 943158421Swollman# Unless otherwise specified, the data for Canada are all from Shanks 944158421Swollman# & Pottenger. 9459908Swollman 946169811Swollman# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 947169811Swollman# 2007-03-01): 948158421Swollman# The British Columbia government announced yesterday that it will 949158421Swollman# adjust daylight savings next year to align with changes in the 950158421Swollman# U.S. and the rest of Canada.... 951158421Swollman# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 952169811Swollman# ... 953169811Swollman# Nova Scotia 954163302Sru# Daylight saving time will be extended by four weeks starting in 2007.... 955169811Swollman# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 956169811Swollman# 957163302Sru# [For New Brunswick] the new legislation dictates that the time change is to 958163302Sru# be done at 02:00 instead of 00:01. 959163302Sru# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 960163302Sru# ... 961163302Sru# Manitoba has traditionally changed the clock every fall at 03:00. 962163302Sru# As of 2006, the transition is to take place one hour earlier at 02:00. 963163302Sru# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 964163302Sru# ... 965163302Sru# [Alberta, Ontario, Quebec] will follow US rules. 966169811Swollman# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 967163302Sru# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 968169811Swollman# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 969163302Sru# ... 970169811Swollman# P.E.I. will follow US rules.... 971169811Swollman# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 972163302Sru# ... 973169811Swollman# Province of Newfoundland and Labrador.... 974169811Swollman# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 975163302Sru# ... 976169811Swollman# Yukon 977169811Swollman# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 978169811Swollman# ... 979163302Sru# N.W.T. will follow US rules. Whoever maintains the government web site 980163302Sru# does not seem to believe in bookmarks. To see the news release, click the 981163302Sru# following link and search for "Daylight Savings Time Change". Press the 982163302Sru# "Daylight Savings Time Change" link; it will fire off a popup using 983163302Sru# JavaScript. 984163302Sru# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 985169811Swollman# ... 986169811Swollman# Nunavut 987169811Swollman# An amendment to the Interpretation Act was registered on February 19/2007.... 988169811Swollman# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 989163302Sru 990158421Swollman# From Paul Eggert (2006-04-25): 99167578Swollman# H. David Matthews and Mary Vincent's map 992153761Swollman# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 99367578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 99467578Swollman# </a> contains detailed boundaries for regions observing nonstandard 99567578Swollman# time and daylight saving time arrangements in Canada circa 1998. 99667578Swollman# 997153761Swollman# INMS, the Institute for National Measurement Standards in Ottawa, has <a 998153761Swollman# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 99967578Swollman# information about standard and daylight saving time zones in Canada. 100067578Swollman# </a> (updated periodically). 100167578Swollman# Its unofficial information is often taken from Matthews and Vincent. 10029908Swollman 1003163302Sru# From Paul Eggert (2006-06-27): 1004163302Sru# For now, assume all of DST-observing Canada will fall into line with the 1005163302Sru# new US DST rules, 1006163302Sru 10072742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 100817200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 100917200SwollmanRule Canada 1918 only - Oct 31 2:00 0 S 1010121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 1011121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 101217200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 101317200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1014153761SwollmanRule Canada 1974 2006 - Oct lastSun 2:00 0 S 1015153761SwollmanRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1016153761SwollmanRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1017153761SwollmanRule Canada 2007 max - Nov Sun>=1 2:00 0 S 101817200Swollman 101917200Swollman 1020163302Sru# Newfoundland and Labrador 102117200Swollman 102267578Swollman# From Paul Eggert (2000-10-02): 102367578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 102467578Swollman# but the only part of Labrador that follows the rules is the 102567578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 102667578Swollman# but excluding, say, Black Tickle. 102767578Swollman 102817200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1029121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 10302742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 1031158421Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 10322742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 10332742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 1034158421Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 10352742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 10362742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1037158421Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1038158421Swollman# Pottenger. 1039121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1040121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1041121098Swollman# Whitman gives the following transitions: 1042121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1043158421Swollman# but go with Shanks & Pottenger and assume they used Canadian rules. 10442742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1045158421Swollman# Apr 30 - Sep 24; go with Shanks & Pottenger. 10462742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 10472742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 10482742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 10492742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 105067578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 105167578Swollman# From Paul Eggert (2000-10-02): 105267578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 105367578Swollman# at 00:01 local time. For now, assume it started in 1987. 105467578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1055158421SwollmanRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 105667578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1057158421SwollmanRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1058158421SwollmanRule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D 1059158421SwollmanRule StJohns 2007 max - Nov Sun>=1 0:01 0 S 1060158421Swollman# 10612742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 10622742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10632742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 1064121098Swollman -3:30:52 StJohns N%sT 1918 1065121098Swollman -3:30:52 Canada N%sT 1919 106620094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 1067121098Swollman -3:30 StJohns N%sT 1942 May 11 1068121098Swollman -3:30 Canada N%sT 1946 10692742Swollman -3:30 StJohns N%sT 10702742Swollman 107167578Swollman# most of east Labrador 107217200Swollman 107320094Swollman# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 107420094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 107520094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1076121098Swollman -3:30:52 - NST 1918 1077121098Swollman -3:30:52 Canada N%sT 1919 107820094Swollman -3:30:52 - NST 1935 Mar 30 107920094Swollman -3:30 - NST 1936 1080121098Swollman -3:30 StJohns N%sT 1942 May 11 1081121098Swollman -3:30 Canada N%sT 1946 108220094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 108320094Swollman -4:00 StJohns A%sT 108420094Swollman 108520094Swollman 1086158421Swollman# west Labrador, Nova Scotia, Prince Edward I 108720094Swollman 1088158421Swollman# From Paul Eggert (2006-03-22): 1089158421Swollman# Shanks & Pottenger write that since 1970 most of this region has been like 1090158421Swollman# Halifax. Many locales did not observe peacetime DST until 1972; 109117200Swollman# Glace Bay, NS is the largest that we know of. 1092158421Swollman# Shanks & Pottenger also write that Liverpool, NS was the only town 1093158421Swollman# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1094158421Swollman# this is a typo. 109517200Swollman 10962742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1097158421SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 1098158421SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 1099158421SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 1100158421SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 1101158421SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 1102158421SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 1103158421SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 1104158421SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1105158421SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 1106158421SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 1107158421SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 1108158421SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 1109158421SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 1110158421SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 1111158421SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 1112158421SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1113158421SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 1114158421SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 1115158421SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 1116158421SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1117158421SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 1118158421SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 1119158421SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 1120158421SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 1121158421SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 1122158421SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 1123158421SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 1124158421SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 1125158421SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 1126158421SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1127158421SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1128158421SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 1129158421SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1130158421SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1131158421SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1132158421SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1133158421SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1134158421SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1135158421SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1136158421SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1137158421SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 11382742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 11392742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1140121098Swollman -4:00 Halifax A%sT 1918 1141121098Swollman -4:00 Canada A%sT 1919 1142121098Swollman -4:00 Halifax A%sT 1942 Feb 9 2:00s 1143121098Swollman -4:00 Canada A%sT 1946 1144121098Swollman -4:00 Halifax A%sT 1974 1145121098Swollman -4:00 Canada A%sT 114617200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 114717200Swollman -4:00 Canada A%sT 1953 114817200Swollman -4:00 Halifax A%sT 1954 114917200Swollman -4:00 - AST 1972 1150121098Swollman -4:00 Halifax A%sT 1974 1151121098Swollman -4:00 Canada A%sT 11522742Swollman 1153158421Swollman# New Brunswick 11548029Swollman 1155169811Swollman# From Paul Eggert (2007-01-31): 1156169811Swollman# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1157169811Swollman# says they changed at 00:01 through 2006, and 1158158421Swollman# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1159169811Swollman# clear that this was the case since at least 1993. 1160163302Sru# For now, assume it started in 1993. 1161158421Swollman 1162158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1163158421SwollmanRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1164158421SwollmanRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1165158421SwollmanRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1166158421SwollmanRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1167158421SwollmanRule Moncton 1939 only - May 27 1:00 1:00 D 1168158421SwollmanRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1169158421SwollmanRule Moncton 1940 only - May 19 1:00 1:00 D 1170158421SwollmanRule Moncton 1941 only - May 4 1:00 1:00 D 1171158421SwollmanRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1172158421SwollmanRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1173158421SwollmanRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1174158421SwollmanRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1175158421SwollmanRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1176158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1177158421SwollmanZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1178158421Swollman -5:00 - EST 1902 Jun 15 1179158421Swollman -4:00 Canada A%sT 1933 1180158421Swollman -4:00 Moncton A%sT 1942 1181158421Swollman -4:00 Canada A%sT 1946 1182158421Swollman -4:00 Moncton A%sT 1973 1183158421Swollman -4:00 Canada A%sT 1993 1184163302Sru -4:00 Moncton A%sT 2007 1185163302Sru -4:00 Canada A%sT 1186158421Swollman 1187163302Sru# Quebec 118817200Swollman 1189163302Sru# From Paul Eggert (2006-07-09): 1190163302Sru# Shanks & Pottenger write that since 1970 most of Quebec has been 1191163302Sru# like Montreal. 1192163302Sru 1193163302Sru# From Paul Eggert (2006-06-27): 1194163302Sru# Matthews and Vincent (1998) also write that Quebec east of the -63 1195163302Sru# meridian is supposed to observe AST, but residents as far east as 1196163302Sru# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1197163302Sru# In "Official time in Quebec" the Quebec department of justice writes in 1198163302Sru# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm 1199163302Sru# that "The residents of the Municipality of the 1200163302Sru# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, 1201163302Sru# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is 1202163302Sru# written and use Atlantic standard time all year round. The same applies to 1203163302Sru# the residents of the Native facilities along the lower North Shore." 1204163302Sru# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> 1205163302Sru# says this common practice was codified into law as of 2007. 1206163302Sru# For lack of better info, guess this practice began around 1970, contra to 1207163302Sru# Shanks & Pottenger who have this region observing AST/ADT. 1208163302Sru 1209163302Sru# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1210163302SruRule Mont 1917 only - Mar 25 2:00 1:00 D 1211163302SruRule Mont 1917 only - Apr 24 0:00 0 S 1212163302SruRule Mont 1919 only - Mar 31 2:30 1:00 D 1213163302SruRule Mont 1919 only - Oct 25 2:30 0 S 1214163302SruRule Mont 1920 only - May 2 2:30 1:00 D 1215163302SruRule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1216163302SruRule Mont 1921 only - May 1 2:00 1:00 D 1217163302SruRule Mont 1922 only - Apr 30 2:00 1:00 D 1218163302SruRule Mont 1924 only - May 17 2:00 1:00 D 1219163302SruRule Mont 1924 1926 - Sep lastSun 2:30 0 S 1220163302SruRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1221163302Sru# The 1927-to-1937 rules can be expressed more simply as 1222163302Sru# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1223163302Sru# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1224163302Sru# The rules below avoid use of 24:00 1225163302Sru# (which pre-1998 versions of zic cannot handle). 1226163302SruRule Mont 1927 only - May 1 0:00 1:00 D 1227163302SruRule Mont 1927 1932 - Sep lastSun 0:00 0 S 1228163302SruRule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1229163302SruRule Mont 1932 only - May 1 0:00 1:00 D 1230163302SruRule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1231163302SruRule Mont 1933 only - Oct 1 0:00 0 S 1232163302SruRule Mont 1934 1939 - Sep lastSun 0:00 0 S 1233163302SruRule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1234163302SruRule Mont 1945 1948 - Sep lastSun 2:00 0 S 1235163302SruRule Mont 1949 1950 - Oct lastSun 2:00 0 S 1236163302SruRule Mont 1951 1956 - Sep lastSun 2:00 0 S 1237163302SruRule Mont 1957 1973 - Oct lastSun 2:00 0 S 1238163302Sru 1239163302Sru# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1240163302SruZone America/Blanc-Sablon -3:48:28 - LMT 1884 1241163302Sru -4:00 Canada A%sT 1970 1242163302Sru -4:00 - AST 1243163302SruZone America/Montreal -4:54:16 - LMT 1884 1244163302Sru -5:00 Mont E%sT 1918 1245163302Sru -5:00 Canada E%sT 1919 1246163302Sru -5:00 Mont E%sT 1942 Feb 9 2:00s 1247163302Sru -5:00 Canada E%sT 1946 1248163302Sru -5:00 Mont E%sT 1974 1249163302Sru -5:00 Canada E%sT 1250163302Sru 1251163302Sru 1252163302Sru# Ontario 1253163302Sru 1254163302Sru# From Paul Eggert (2006-07-09): 1255163302Sru# Shanks & Pottenger write that since 1970 most of Ontario has been like 1256163302Sru# Toronto. 125717200Swollman# Thunder Bay skipped DST in 1973. 125817200Swollman# Many smaller locales did not observe peacetime DST until 1974; 125917200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 126017200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 126117200Swollman 1262121098Swollman# From Mark Brader (2003-07-26): 1263121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 1264121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 1265121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1266121098Swollman# have already done so. In Orillia DST was to run until Saturday, 1267121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 1268121098Swollman# hostility from certain segments of the public, and was revoked after 1269121098Swollman# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1270121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1271121098Swollman# earlier in June). 1272121098Swollman# 1273121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1274121098Swollman 127543014Swollman# From Paul Eggert (1997-10-17): 1276121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 127743014Swollman# says that Atikokan, Ontario currently does not observe DST, 127843014Swollman# but will vote on 11-10 whether to use EST/EDT. 127943014Swollman# He also writes that the 128043014Swollman# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 128143014Swollman# Ontario Time Act (1990, Chapter T.9) 128243014Swollman# </a> 128343014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 128443014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 128543014Swollman# concerns a non-official time observed as a matter of local practice. 1286158421Swollman# 128767578Swollman# From Paul Eggert (2000-10-02): 128867578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 128967578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 129067578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 129167578Swollman# violation of the official Ontario rules. 1292163302Sru# 1293163302Sru# From Paul Eggert (2006-07-09): 1294163302Sru# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1295163302Sru# 2005-07-21 Chronicle-Journal, which said: 1296163302Sru# 1297163302Sru# The clocks in Atikokan stay set on standard time year-round. 1298163302Sru# This means they spend about half the time on central time and 1299163302Sru# the other half on eastern time. 1300163302Sru# 1301163302Sru# For the most part, the system works, Mayor Dennis Brown said. 1302163302Sru# 1303163302Sru# "The majority of businesses in Atikokan deal more with Eastern 1304163302Sru# Canada, but there are some that deal with Western Canada," he 1305163302Sru# said. "I don't see any changes happening here." 1306163302Sru# 1307163302Sru# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1308163302Sru# [New Osnaburgh] follow the same practice." 130967578Swollman 1310163302Sru# From Garry McKinnon (2006-07-14) via Chris Walton: 1311163302Sru# I chatted with a member of my board who has an outstanding memory 1312163302Sru# and a long history in Atikokan (and in the telecom industry) and he 1313163302Sru# can say for certain that Atikokan has been practicing the current 1314163302Sru# time keeping since 1952, at least. 1315163302Sru 1316163302Sru# From Paul Eggert (2006-07-17): 1317163302Sru# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1318163302Sru# ever since standard time was introduced, but the information from 1319163302Sru# McKinnon sounds more authoritative. For now, assume that Atikokan 1320163302Sru# switched to EST immediately after WWII era daylight saving time 1321163302Sru# ended. This matches the old (less-populous) America/Coral_Harbour 1322163302Sru# entry since our cutoff date of 1970, so we can move 1323163302Sru# America/Coral_Harbour to the 'backward' file. 1324163302Sru 13252742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1326121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 1327121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 1328121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 1329121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 1330121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 1331121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 1332121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1333158421Swollman# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1334158421Swollman# was meant. 1335121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1336121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1337136638Swollman# The 1927-to-1939 rules can be expressed more simply as 1338136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1339136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1340136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1341136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1342136638Swollman# The rules below avoid use of Sun>=25 1343136638Swollman# (which pre-2004 versions of zic cannot handle). 1344136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1345136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1346136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1347136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1348136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1349136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1350121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1351121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1352121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1353121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1354121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1355121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1356121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1357121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1358158421Swollman# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1359163302Sru# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1360163302Sru# is wrong, and that he had confirmed it by checking the 1971-10-30 1361163302Sru# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1362121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1363121098Swollman 1364121098Swollman# From Paul Eggert (2003-07-27): 1365121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1366121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1367121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1368136638Swollman# Saskatchewan, for one year." 1369121098Swollman 1370136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1371136638Swollman# Thunder Bay Museum (2003-11-12): 1372136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1373136638Swollman# savings time was being practiced in Fort William and Port Arthur 1374136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1375136638Swollman# Time Zones was permanently moved about two hundred miles west to 1376136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1377136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1378136638Swollman# already, did not change their clocks.... During the Second World 1379136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1380136638Swollman# months for the remainder of the war years. 1381136638Swollman 13822742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1383121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1384121098Swollman -5:00 Canada E%sT 1919 1385121098Swollman -5:00 Toronto E%sT 1942 Feb 9 2:00s 1386121098Swollman -5:00 Canada E%sT 1946 1387121098Swollman -5:00 Toronto E%sT 1974 1388121098Swollman -5:00 Canada E%sT 138917200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1390136638Swollman -6:00 - CST 1910 1391136638Swollman -5:00 - EST 1942 139217200Swollman -5:00 Canada E%sT 1970 139317200Swollman -5:00 Mont E%sT 1973 139417200Swollman -5:00 - EST 1974 139517200Swollman -5:00 Canada E%sT 139617200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1397121098Swollman -5:00 Canada E%sT 1940 Sep 29 1398121098Swollman -5:00 1:00 EDT 1942 Feb 9 2:00s 139917200Swollman -5:00 Canada E%sT 1400163302SruZone America/Rainy_River -6:18:16 - LMT 1895 1401121098Swollman -6:00 Canada C%sT 1940 Sep 29 1402121098Swollman -6:00 1:00 CDT 1942 Feb 9 2:00s 140317200Swollman -6:00 Canada C%sT 1404163302SruZone America/Atikokan -6:06:28 - LMT 1895 1405163302Sru -6:00 Canada C%sT 1940 Sep 29 1406163302Sru -6:00 1:00 CDT 1942 Feb 9 2:00s 1407163302Sru -6:00 Canada C%sT 1945 Sep 30 2:00 1408163302Sru -5:00 - EST 14092742Swollman 14108029Swollman 141117200Swollman# Manitoba 141219878Swollman 1413158421Swollman# From Rob Douglas (2006-04-06): 1414158421Swollman# the old Manitoba Time Act - as amended by Bill 2, assented to 1415158421Swollman# March 27, 1987 ... said ... 1416158421Swollman# "between two o'clock Central Standard Time in the morning of 1417158421Swollman# the first Sunday of April of each year and two o'clock Central 1418158421Swollman# Standard Time in the morning of the last Sunday of October next 1419158421Swollman# following, one hour in advance of Central Standard Time."... 1420158421Swollman# I believe that the English legislation [of the old time act] had = 1421158421Swollman# been assented to (March 22, 1967).... 1422158421Swollman# Also, as far as I can tell, there was no order-in-council varying 1423158421Swollman# the time of Daylight Saving Time for 2005 and so the provisions of 1424158421Swollman# the 1987 version would apply - the changeover was at 2:00 Central 1425158421Swollman# Standard Time (i.e. not until 3:00 Central Daylight Time). 1426158421Swollman 1427158421Swollman# From Paul Eggert (2006-04-10): 1428158421Swollman# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1429158421Swollman# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1430158421Swollman# it was also 02:00s in 1966. 1431158421Swollman 14322742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14332742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 14342742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 14352742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 14362742SwollmanRule Winn 1918 only - Oct 31 2:00 0 S 14372742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 143814343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1439121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1440121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 14412742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 14422742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 14432742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 14442742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 144514343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 144614343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 144714343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 144814343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 144914343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 14502742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 14512742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 14522742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 145314343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 1454158421SwollmanRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1455158421SwollmanRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1456158421SwollmanRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 14572742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14582742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1459158421Swollman -6:00 Winn C%sT 2006 1460158421Swollman -6:00 Canada C%sT 14612742Swollman 14628029Swollman 146317200Swollman# Saskatchewan 146417200Swollman 1465121098Swollman# From Mark Brader (2003-07-26): 1466121098Swollman# The first actual adoption of DST in Canada was at the municipal 1467121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1468121098Swollman# elsewhere have long been talking of legislation to save daylight, 1469121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1470121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1471121098Swollman# presumably late evening, as below), and would run until "the end of 1472121098Swollman# the summer". The discrepancy between municipal time and railroad 1473121098Swollman# time was noted. 1474121098Swollman 1475121098Swollman# From Paul Eggert (2003-07-27): 1476121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1477121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1478121098Swollman 1479158421Swollman# From Paul Eggert (2006-03-22): 1480158421Swollman# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 148117200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 148217200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 148367578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 148467578Swollman# are like Winnipeg, in violation of Saskatchewan law. 148517200Swollman 1486149514Swollman# From W. Jones (1992-11-06): 148717200Swollman# The. . .below is based on information I got from our law library, the 148817200Swollman# provincial archives, and the provincial Community Services department. 148917200Swollman# A precise history would require digging through newspaper archives, and 149017200Swollman# since you didn't say what you wanted, I didn't bother. 149117200Swollman# 149217200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 149317200Swollman# the boundary became pretty ragged as communities near it reevaluated 149417200Swollman# their affiliations in one direction or the other. In 1965 a provincial 149517200Swollman# referendum favoured legislating common time practices. 149617200Swollman# 149717200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 149817200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 149917200Swollman# part of Saskatchewan would use CST year round, that districts in 150017200Swollman# northwest Saskatchewan would by default follow CST but could opt to 150117200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 150217200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 150317200Swollman# by default follow MT but could opt to follow CST. 150417200Swollman# 150517200Swollman# It took a few years for the dust to settle (I know one story of a town 150617200Swollman# on one time zone having its school in another, such that a mom had to 150717200Swollman# serve her family lunch in two shifts), but presently it seems that only 150817200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 150917200Swollman# rules any more; all other districts appear to have used CST year round 151017200Swollman# since sometime in the 1960s. 151117200Swollman 1512163302Sru# From Chris Walton (2006-06-26): 1513163302Sru# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1514163302Sru# long and rather painful to read. 1515163302Sru# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1516163302Sru 15172742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15182742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 15192742SwollmanRule Regina 1918 only - Oct 31 2:00 0 S 15202742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 15212742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 15222742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 15232742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 15242742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 15252742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1526121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1527121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 15282742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 152917200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 153017200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1531121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1532121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1533121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 153417200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 153517200Swollman# 153617200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 153717200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 153817200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 153917200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 154017200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 15412742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 154217200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 154317200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 15442742Swollman -6:00 - CST 154517200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 154617200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 154717200Swollman -7:00 Regina M%sT 1950 154817200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 154917200Swollman -6:00 - CST 15502742Swollman 15518029Swollman 155217200Swollman# Alberta 155317200Swollman 15542742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15552742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 15562742SwollmanRule Edm 1918 only - Oct 31 2:00 0 S 15572742SwollmanRule Edm 1919 only - May 27 2:00 0 S 15582742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 15592742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 15602742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1561121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1562121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 15632742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 15642742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 15652742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 15662742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 15672742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 15682742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 15692742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 15702742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1571158421SwollmanRule Edm 1972 2006 - Oct lastSun 2:00 0 S 15722742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15732742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 1574158421Swollman -7:00 Edm M%sT 1987 1575158421Swollman -7:00 Canada M%sT 15762742Swollman 15778029Swollman 157817200Swollman# British Columbia 157917200Swollman 1580158421Swollman# From Paul Eggert (2006-03-22): 1581158421Swollman# Shanks & Pottenger write that since 1970 most of this region has 1582158421Swollman# been like Vancouver. 158358787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 158467578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 158517200Swollman 15862742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15872742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 15882742SwollmanRule Vanc 1918 only - Oct 31 2:00 0 S 1589121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1590121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 15912742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 15922742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 15932742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 15942742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1595158421SwollmanRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 15962742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15972742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 1598158421Swollman -8:00 Vanc P%sT 1987 1599158421Swollman -8:00 Canada P%sT 160017200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 160117200Swollman -8:00 Canada P%sT 1947 160217200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 160317200Swollman -7:00 - MST 16042742Swollman 16058029Swollman 160658787Sru# Northwest Territories, Nunavut, Yukon 160717200Swollman 1608158421Swollman# From Paul Eggert (2006-03-22): 160917200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1610149514Swollman# Mathew Englander (1996-10-07) gives the following refs: 161120094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 161220094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 161320094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 161420094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 161520094Swollman# * O.I.C. 1980/02 established DST. 161620094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1617158421Swollman# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1618158421Swollman# with Englander. 1619163302Sru# From Chris Walton (2006-06-26): 1620163302Sru# Here is a link to the old daylight saving portion of the interpretation 1621163302Sru# act which was last updated in 1987: 1622163302Sru# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 162317200Swollman 162458787Sru# From Rives McDow (1999-09-04): 162558787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 162658787Sru# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 162758787Sru# Nunavut moves to single time zone Oct. 31 162858787Sru# </a> 162958787Sru# 163058787Sru# From Antoine Leca (1999-09-06): 163158787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 163258787Sru# to differentiate it from the Yellowknife region. 163358787Sru 163458787Sru# From Paul Eggert (1999-09-20): 163558787Sru# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 163658787Sru# Basic Facts: The New Territory 163786222Swollman# </a> (1999) reports that Pangnirtung operates on eastern time, 163858787Sru# and that Coral Harbour does not observe DST. We don't know when 163986222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 164058787Sru 164158787Sru# From Rives McDow (1999-11-08): 164258787Sru# On October 31, when the rest of Nunavut went to Central time, 164358787Sru# Pangnirtung wobbled. Here is the result of their wobble: 164458787Sru# 164558787Sru# The following businesses and organizations in Pangnirtung use Central Time: 164658787Sru# 164758787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 164858787Sru# Eastern Arctic National Parks, A & D Specialist 164958787Sru# 165058787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 165158787Sru# 165258787Sru# Hamlet office, All other businesses, Both schools, Airport operator 165358787Sru# 165458787Sru# This has made for an interesting situation there, which warranted the news. 165558787Sru# No one there that I spoke with seems concerned, or has plans to 165658787Sru# change the local methods of keeping time, as it evidently does not 165758787Sru# really interfere with any activities or make things difficult locally. 165858787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 165958787Sru# so it appears that the situation will last at least that long. 166058787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 166158787Sru# their senses", but the locals evidently don't see any problem with 166258787Sru# the current state of affairs. 166358787Sru 166458787Sru# From Michaela Rodrigue, writing in the 166558787Sru# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 166658787Sru# Nunatsiaq News (1999-11-19)</a>: 166758787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 166858787Sru# central - or Nunavut time - for government offices, and eastern time 166958787Sru# for municipal offices and schools.... Igloolik [was similar but then] 167058787Sru# made the switch to central time on Saturday, Nov. 6. 167158787Sru 167267578Swollman# From Paul Eggert (2000-10-02): 167367578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 167467578Swollman# for these potential new Zones. 167575267Swollman# 167667578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 167767578Swollman# handful of residents at the Eureka weather station [in the Central 167867578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 167967578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 168067578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 168167578Swollman# Central Time and Southampton Island [in the Central zone] is not 168267578Swollman# required to use daylight savings. 168367578Swollman 168475267Swollman# From 168575267Swollman# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 168675267Swollman# Nunavut now has two time zones 168775267Swollman# </a> (2000-11-10): 168875267Swollman# The Nunavut government would allow its employees in Kugluktuk and 168975267Swollman# Cambridge Bay to operate on central time year-round, putting them 169075267Swollman# one hour behind the rest of Nunavut for six months during the winter. 169175267Swollman# At the end of October the two communities had rebelled against 169275267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 169375267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 169475267Swollman# central time, while Kugluktuk, even farther west, reverted to 169575267Swollman# mountain time, which they had used before the advent of Nunavut's 169675267Swollman# unified time zone in 1999. 169775267Swollman# 169875267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 169975267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 170075267Swollman 170175267Swollman# From Paul Eggert (2000-12-04): 170275267Swollman# Let's just keep track of the official times for now. 170375267Swollman 170475267Swollman# From Rives McDow (2001-03-07): 170575267Swollman# The premier of Nunavut has issued a ministerial statement advising 170675267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 170775267Swollman# back to three time zones (mountain, central, and eastern). Of the 170875267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 170975267Swollman# has said it will not observe dst, staying on EST year round. I'm 171075267Swollman# checking for more info, and will get back to you if I come up with 171175267Swollman# more. 171275267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 171375267Swollman 1714149514Swollman# From Gwillim Law (2005-05-21): 1715149514Swollman# According to maps at 1716149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 1717149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 1718149514Swollman# (both dated 2003), and 1719149514Swollman# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 1720149514Swollman# (from a 1998 Canadian Geographic article), the de facto and de jure time 1721149514Swollman# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 1722149514Swollman# round. Using Google, it's easy to find other websites that confirm this. 1723149514Swollman# I wasn't able to find how far back this time regimen goes, but since it 1724149514Swollman# predates the creation of Nunavut, it probably goes back many years.... 1725149514Swollman# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 1726149514Swollman# 1727149514Swollman# From Paul Eggert (2005-07-26): 1728149514Swollman# For lack of better information, assume that Southampton Island observed 1729149514Swollman# daylight saving only during wartime. 1730149514Swollman 1731169811Swollman# From Chris Walton (2007-03-01): 1732169811Swollman# ... the community of Resolute (located on Cornwallis Island in 1733169811Swollman# Nunavut) moved from Central Time to Eastern Time last November. 1734169811Swollman# Basically the community did not change its clocks at the end of 1735169811Swollman# daylight saving.... 1736169811Swollman# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 1737163302Sru 1738169811Swollman# From Chris Walton (2007-03-14): 1739169811Swollman# Today I phoned the "hamlet office" to find out what Resolute was doing with 1740169811Swollman# its clocks. 1741169811Swollman# 1742169811Swollman# The individual that answered the phone confirmed that the clocks did not 1743169811Swollman# move at the end of daylight saving on October 29/2006. He also told me that 1744169811Swollman# the clocks did not move this past weekend (March 11/2007).... 1745169811Swollman 1746187588Sedwin# From Chris Walton (2008-11-13): 1747187588Sedwin# ...the residents of Resolute believe that they are changing "time zones" 1748187588Sedwin# twice a year. In winter months, local time is qualified with "Eastern 1749187588Sedwin# Time" which is really "Eastern Standard Time (UTC-5)". In summer 1750187588Sedwin# months, local time is qualified with "Central Time" which is really 1751187588Sedwin# "Central Daylight Time (UTC-5)"... 1752187588Sedwin 17532742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 175417200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 175517200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 175617200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 175717200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 1758121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 1759121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 176017200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 176117200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 176217200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 176317200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 1764158421SwollmanRule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 1765158421SwollmanRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 17662742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1767169811Swollman# aka Panniqtuuq 1768169811SwollmanZone America/Pangnirtung 0 - zzz 1921 # trading post est. 176958787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 177058787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 177175267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 177275267Swollman -5:00 Canada E%sT 1773169811Swollman# formerly Frobisher Bay 1774169811SwollmanZone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 177558787Sru -5:00 NT_YK E%sT 1999 Oct 31 2:00 177675267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 177775267Swollman -5:00 Canada E%sT 1778169811Swollman# aka Qausuittuq 1779187588Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1780187588SedwinRule Resolute 2006 max - Nov Sun>=1 2:00 0 ES 1781187588SedwinRule Resolute 2007 max - Mar Sun>=8 2:00 0 CD 1782169811SwollmanZone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 178375267Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 178475267Swollman -5:00 - EST 2001 Apr 1 3:00 1785169811Swollman -6:00 Canada C%sT 2006 Oct 29 2:00 1786187588Sedwin -5:00 Resolute %sT 1787169811Swollman# aka Kangiqiniq 1788169811SwollmanZone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 1789169811Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 1790169811Swollman -5:00 - EST 2001 Apr 1 3:00 179158787Sru -6:00 Canada C%sT 1792169811Swollman# aka Iqaluktuuttiaq 1793169811SwollmanZone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 179458787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 179575267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 179675267Swollman -5:00 - EST 2000 Nov 5 0:00 179775267Swollman -6:00 - CST 2001 Apr 1 3:00 179875267Swollman -7:00 Canada M%sT 1799169811SwollmanZone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 1800158421Swollman -7:00 NT_YK M%sT 1980 1801158421Swollman -7:00 Canada M%sT 1802169811SwollmanZone America/Inuvik 0 - zzz 1953 # Inuvik founded 180317200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 1804158421Swollman -7:00 NT_YK M%sT 1980 1805158421Swollman -7:00 Canada M%sT 18062742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 180717200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 1808158421Swollman -8:00 NT_YK P%sT 1980 1809158421Swollman -8:00 Canada P%sT 181017200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 181120094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 1812158421Swollman -8:00 NT_YK P%sT 1980 1813158421Swollman -8:00 Canada P%sT 18142742Swollman 18158029Swollman 18162742Swollman############################################################################### 18172742Swollman 18182742Swollman# Mexico 18192742Swollman 182075267Swollman# From Paul Eggert (2001-03-05): 182175267Swollman# The Investigation and Analysis Service of the 182275267Swollman# Mexican Library of Congress (MLoC) has published a 182375267Swollman# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 182475267Swollman# history of Mexican local time (in Spanish) 182575267Swollman# </a>. 18262742Swollman# 1827158421Swollman# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 182875267Swollman# (In all cases we go with the MLoC.) 1829158421Swollman# S&P report that Baja was at -8:00 in 1922/1923. 1830158421Swollman# S&P say the 1930 transition in Baja was 1930-11-16. 1831158421Swollman# S&P report no DST during summer 1931. 1832158421Swollman# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 18332742Swollman 183475267Swollman# From Gwillim Law (2001-02-20): 183575267Swollman# There are some other discrepancies between the Decrees page and the 183675267Swollman# tz database. I think they can best be explained by supposing that 183775267Swollman# the researchers who prepared the Decrees page failed to find some of 183875267Swollman# the relevant documents. 183975267Swollman 1840149514Swollman# From Alan Perry (1996-02-15): 184117200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 184217200Swollman# outlining the timezone changes in Mexico. 184358787Sru# 184417200Swollman# ------------- Begin Forwarded Message ------------- 184558787Sru# 184617200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 184717200Swollman# rules for the DST changes. The rules are: 184858787Sru# 184917200Swollman# 1. The country is divided in 3 timezones: 185017200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 185117200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 185217200Swollman# - The rest of the country (the Mexico/General TZ) 185358787Sru# 185417200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 185517200Swollman# at 2:00 AM, the times in each zone are as follows: 185617200Swollman# BajaNorte: GMT+7 185717200Swollman# BajaSur: GMT+6 185817200Swollman# General: GMT+5 185958787Sru# 186017200Swollman# 3. The rest of the year, the times are as follows: 186117200Swollman# BajaNorte: GMT+8 186217200Swollman# BajaSur: GMT+7 186317200Swollman# General: GMT+6 186458787Sru# 186517200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 186658787Sru# 186717200Swollman# -------------- End Forwarded Message -------------- 186817200Swollman# From Paul Eggert (1996-06-12): 186943014Swollman# For an English translation of the decree, see 187043014Swollman# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 187143014Swollman# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 187243014Swollman# </a> 187314343Swollman 187443543Swollman# From Rives McDow (1998-10-08): 187543543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 187643543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 187743543Swollman 187858787Sru# From Rives McDow (2000-01-10): 187958787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 188058787Sru# zone 5 hours from the International Date Line, and will not observe daylight 188158787Sru# savings time so as to stay on the same time zone as the southern part of 188258787Sru# Arizona year round. 188358787Sru 188475267Swollman# From Jesper Norgaard, translating 188575267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 188675267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 188775267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 188875267Swollman# year, so that the more than 10,000 schools work at normal hour the 188975267Swollman# whole year. 189075267Swollman 189175267Swollman# From Gwillim Law (2001-01-19): 189275267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 189375267Swollman# (translated):... 189475267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 189575267Swollman# that Summer Time will be reduced from seven to five months, starting 189675267Swollman# this year.... 189775267Swollman# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 189875267Swollman# [translated], says "summer time will ... take effect on the first Sunday 189975267Swollman# in May, and end on the last Sunday of September. 190075267Swollman 190175267Swollman# From Arthur David Olson (2001-01-25): 190275267Swollman# The 2001-01-24 traditional Washington Post contained the page one 190375267Swollman# story "Timely Issue Divides Mexicans."... 190475267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 190575267Swollman# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 190675267Swollman# Mexico City and its 20 million residents on a different time than 190775267Swollman# the rest of the country..." In particular, Lopez Obrador would abolish 190875267Swollman# observation of Daylight Saving Time. 190975267Swollman 191075267Swollman# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 191175267Swollman# Official statute published by the Energy Department 191275267Swollman# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 191375267Swollman# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 191475267Swollman 191575267Swollman# From Paul Eggert (2001-03-03): 191675267Swollman# 191775267Swollman# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 191875267Swollman# James F. Smith writes in today's LA Times 191975267Swollman# </a> 192075267Swollman# * Sonora will continue to observe standard time. 192175267Swollman# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 192275267Swollman# the Federal District will not adopt DST. 192375267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 192475267Swollman# * The decree does not affect federal-controlled facilities including 192575267Swollman# the airport, banks, hospitals, and schools. 192675267Swollman# 192775267Swollman# For now we'll assume that the Federal District will bow to federal rules. 192875267Swollman 192975267Swollman# From Jesper Norgaard (2001-04-01): 193075267Swollman# I found some references to the Mexican application of daylight 193175267Swollman# saving, which modifies what I had already sent you, stating earlier 193275267Swollman# that a number of northern Mexican states would go on daylight 193375267Swollman# saving. The modification reverts this to only cover Baja California 193475267Swollman# (Norte), while all other states (except Sonora, who has no daylight 193575267Swollman# saving all year) will follow the original decree of president 193675267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 193775267Swollman# September 30, 2001. 193875267Swollman# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 193975267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 194075267Swollman 194186222Swollman# From Reuters (2001-09-04): 194286222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 194386222Swollman# unconstitutional in Mexico City, creating the possibility the 194486222Swollman# capital will be in a different time zone from the rest of the nation 194586222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 194686222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 194786222Swollman# standard time. "This is so residents of the Federal District are not 194886222Swollman# subject to unexpected time changes," a statement from the court said. 194986222Swollman 195093799Swollman# From Jesper Norgaard Welen (2002-03-12): 195193799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 195293799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 195393799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 195493799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 195593799Swollman 19562742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 19572742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 19582742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 19592742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 19602742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 1961121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 19622742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 19632742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 19642742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 196575267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 196675267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 196793799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 196893799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 196993799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 197093799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 19712742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 197243014Swollman# Quintana Roo 197358787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 197475267Swollman -6:00 - CST 1981 Dec 23 197543543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 197643543Swollman -6:00 Mexico C%sT 197764499Swollman# Campeche, Yucatan 197864499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 197975267Swollman -6:00 - CST 1981 Dec 23 198064499Swollman -5:00 - EST 1982 Dec 2 198164499Swollman -6:00 Mexico C%sT 198264499Swollman# Coahuila, Durango, Nuevo Leon, Tamaulipas 198375267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 198464499Swollman -6:00 - CST 1988 198564499Swollman -6:00 US C%sT 1989 198664499Swollman -6:00 Mexico C%sT 198743014Swollman# Central Mexico 19882742SwollmanZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 19892742Swollman -7:00 - MST 1927 Jun 10 23:00 19902742Swollman -6:00 - CST 1930 Nov 15 19912742Swollman -7:00 - MST 1931 May 1 23:00 19922742Swollman -6:00 - CST 1931 Oct 199375267Swollman -7:00 - MST 1932 Apr 1 199486222Swollman -6:00 Mexico C%sT 2001 Sep 30 02:00 199593799Swollman -6:00 - CST 2002 Feb 20 199693799Swollman -6:00 Mexico C%sT 199743014Swollman# Chihuahua 199858787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 199943014Swollman -7:00 - MST 1927 Jun 10 23:00 200043014Swollman -6:00 - CST 1930 Nov 15 200143014Swollman -7:00 - MST 1931 May 1 23:00 200243014Swollman -6:00 - CST 1931 Oct 200375267Swollman -7:00 - MST 1932 Apr 1 200443014Swollman -6:00 - CST 1996 200543014Swollman -6:00 Mexico C%sT 1998 200643014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 200743014Swollman -7:00 Mexico M%sT 200858787Sru# Sonora 200958787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 201058787Sru -7:00 - MST 1927 Jun 10 23:00 201158787Sru -6:00 - CST 1930 Nov 15 201258787Sru -7:00 - MST 1931 May 1 23:00 201358787Sru -6:00 - CST 1931 Oct 201475267Swollman -7:00 - MST 1932 Apr 1 201564499Swollman -6:00 - CST 1942 Apr 24 201658787Sru -7:00 - MST 1949 Jan 14 201758787Sru -8:00 - PST 1970 201858787Sru -7:00 Mexico M%sT 1999 201958787Sru -7:00 - MST 202064499Swollman# Baja California Sur, Nayarit, Sinaloa 20212742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 20222742Swollman -7:00 - MST 1927 Jun 10 23:00 20232742Swollman -6:00 - CST 1930 Nov 15 20242742Swollman -7:00 - MST 1931 May 1 23:00 20252742Swollman -6:00 - CST 1931 Oct 202675267Swollman -7:00 - MST 1932 Apr 1 202764499Swollman -6:00 - CST 1942 Apr 24 20282742Swollman -7:00 - MST 1949 Jan 14 20292742Swollman -8:00 - PST 1970 203014343Swollman -7:00 Mexico M%sT 203158787Sru# Baja California 20322742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 203375267Swollman -7:00 - MST 1924 20342742Swollman -8:00 - PST 1927 Jun 10 23:00 203575267Swollman -7:00 - MST 1930 Nov 15 203675267Swollman -8:00 - PST 1931 Apr 1 203775267Swollman -8:00 1:00 PDT 1931 Sep 30 203864499Swollman -8:00 - PST 1942 Apr 24 2039158421Swollman -8:00 1:00 PWT 1945 Aug 14 23:00u 2040158421Swollman -8:00 1:00 PPT 1945 Nov 12 # Peace 204175267Swollman -8:00 - PST 1948 Apr 5 204275267Swollman -8:00 1:00 PDT 1949 Jan 14 204375267Swollman -8:00 - PST 1954 204475267Swollman -8:00 CA P%sT 1961 204575267Swollman -8:00 - PST 1976 204614343Swollman -8:00 US P%sT 1996 204775267Swollman -8:00 Mexico P%sT 2001 204893799Swollman -8:00 US P%sT 2002 Feb 20 204993799Swollman -8:00 Mexico P%sT 2050158421Swollman# From Paul Eggert (2006-03-22): 205175267Swollman# Formerly there was an America/Ensenada zone, which differed from 205275267Swollman# America/Tijuana only in that it did not observe DST from 1976 2053158421Swollman# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2054158421Swollman# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 205575267Swollman# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2056158421Swollman# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 205775267Swollman# DST-observance was a town-by-town matter back then. This concerns 205875267Swollman# data after 1970 so most likely there should be at least one Zone 205975267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 206075267Swollman# name or contents should be. 20612742Swollman# 20622742Swollman# Revillagigedo Is 20632742Swollman# no information 20642742Swollman 20652742Swollman############################################################################### 20662742Swollman 20672742Swollman# Anguilla 20682742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 20692742SwollmanZone America/Anguilla -4:12:16 - LMT 1912 Mar 2 20702742Swollman -4:00 - AST 20712742Swollman 20722742Swollman# Antigua and Barbuda 20732742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 20742742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 20752742Swollman -5:00 - EST 1951 20762742Swollman -4:00 - AST 20772742Swollman 20782742Swollman# Bahamas 2079169811Swollman# 2080169811Swollman# From Sue Williams (2006-12-07): 2081169811Swollman# The Bahamas announced about a month ago that they plan to change their DST 2082169811Swollman# rules to sync with the U.S. starting in 2007.... 2083169811Swollman# http://www.jonesbahamas.com/?c=45&a=10412 2084169811Swollman 20852742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2086181421SedwinRule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2087181421SedwinRule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 20882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 20892742SwollmanZone America/Nassau -5:09:24 - LMT 1912 Mar 2 2090169811Swollman -5:00 Bahamas E%sT 1976 2091169811Swollman -5:00 US E%sT 20922742Swollman 20932742Swollman# Barbados 20942742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 20952742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 20962742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 20972742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 20982742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 20992742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 21002742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 21012742SwollmanZone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 210243014Swollman -3:58:28 - BMT 1932 # Bridgetown Mean Time 21032742Swollman -4:00 Barb A%sT 21042742Swollman 21052742Swollman# Belize 2106158421Swollman# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 21072742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 21082742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 21092742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 21102742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 21112742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 21122742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 21132742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 21142742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 21152742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 21162742Swollman -6:00 Belize C%sT 21172742Swollman 21182742Swollman# Bermuda 2119163302Sru 2120163302Sru# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2121163302Sru 2122163302Sru# Next year, however, clocks in the US will go forward on the second Sunday 2123163302Sru# in March, until the first Sunday in November. And, after the Time Zone 2124163302Sru# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2125163302Sru# Friday, the same thing will happen in Bermuda. 2126163302Sru# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2127163302Sru 21282742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 21292742SwollmanZone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 21302742Swollman -4:00 - AST 1974 Apr 28 2:00 2131163302Sru -4:00 Bahamas A%sT 1976 2132163302Sru -4:00 US A%sT 21332742Swollman 21342742Swollman# Cayman Is 21352742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 21362742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 213743014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 21382742Swollman -5:00 - EST 21392742Swollman 21402742Swollman# Costa Rica 21412742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 21422742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 21432742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 214420094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2145158421Swollman# IATA SSIM (1991-09) says the following was at 1:00; 2146158421Swollman# go with Shanks & Pottenger. 214720094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 214820094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 21492742Swollman# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 21502742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 21512742SwollmanZone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 215258787Sru -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 21532742Swollman -6:00 CR C%sT 21542742Swollman# Coco 21552742Swollman# no information; probably like America/Costa_Rica 21562742Swollman 21572742Swollman# Cuba 21582742Swollman 215958787Sru# From Arthur David Olson (1999-03-29): 216058787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 216158787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 216258787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 216358787Sru# During the game, play-by-play announcer Jim Hunter noted that 216458787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 216558787Sru# Time today." (The "two hour" remark referred to losing one hour of 216658787Sru# sleep on 1999-03-28--when the announcers were in Cuba as it switched 216758787Sru# to DST--and one more hour on 1999-04-04--when the announcers will have 216858787Sru# returned to Baltimore, which switches on that date.) 21692742Swollman 2170138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2171138323Swollman# Cuba is not going back to standard time this year. 2172158421Swollman# From Paul Eggert (2006-03-22): 2173138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2174138323Swollman# says that it's due to a problem at the Antonio Guiteras 2175138323Swollman# thermoelectric plant, and says "This October there will be no return 2176138323Swollman# to normal hours (after daylight saving time)". 2177158421Swollman# For now, let's assume that it's a temporary measure. 2178138323Swollman 2179153670Swollman# From Carlos A. Carnero Delgado (2005-11-12): 2180153670Swollman# This year (just like in 2004-2005) there's no change in time zone 2181153670Swollman# adjustment in Cuba. We will stay in daylight saving time: 2182153670Swollman# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2183153670Swollman 2184169811Swollman# From Jesper Norgaard Welen (2006-10-21): 2185169811Swollman# An article in GRANMA INTERNACIONAL claims that Cuba will end 2186169811Swollman# the 3 years of permanent DST next weekend, see 2187169811Swollman# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2188169811Swollman# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2189169811Swollman# watches should be set back one hour -- going back to 00:00 hours -- returning 2190169811Swollman# to the normal schedule.... 2191163302Sru 2192169811Swollman# From Paul Eggert (2007-03-02): 2193169811Swollman# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2194169811Swollman# says Cuban clocks will advance at midnight on March 10. 2195169811Swollman# For lack of better information, assume Cuba will use US rules, 2196169811Swollman# except that it switches at midnight standard time as usual. 2197173319Sedwin# 2198173319Sedwin# From Steffen Thorsen (2007-10-25): 2199173319Sedwin# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2200173319Sedwin# earlier - on the last Sunday of October, just like in 2006. 2201173319Sedwin# 2202173319Sedwin# He supplied these references: 2203173319Sedwin# 2204173319Sedwin# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2205173319Sedwin# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2206173319Sedwin# 2207173319Sedwin# From Alex Kryvenishev (2007-10-25): 2208173319Sedwin# Here is also article from Granma (Cuba): 2209173319Sedwin# 2210173319Sedwin# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre 2211173319Sedwin# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2212173319Sedwin# 2213173319Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2214169811Swollman 2215177591Sedwin# From Arthur David Olson (2008-03-09): 2216177591Sedwin# I'm in Maryland which is now observing United States Eastern Daylight 2217177591Sedwin# Time. At 9:44 local time I used RealPlayer to listen to 2218177591Sedwin# <a href="http://media.enet.cu/radioreloj"> 2219177591Sedwin# http://media.enet.cu/radioreloj 2220177591Sedwin# </a>, a Cuban information station, and heard 2221177591Sedwin# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2222177591Sedwin# indicating that Cuba is still on standard time. 2223177591Sedwin 2224177591Sedwin# From Steffen Thorsen (2008-03-12): 2225177591Sedwin# It seems that Cuba will start DST on Sunday, 2007-03-16... 2226177591Sedwin# It was announced yesterday, according to this source (in Spanish): 2227177591Sedwin# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> 2228177591Sedwin# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2229177591Sedwin# </a> 2230177591Sedwin# 2231177591Sedwin# Some more background information is posted here: 2232177591Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> 2233177591Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2234177591Sedwin# </a> 2235177591Sedwin# 2236177591Sedwin# The article also says that Cuba has been observing DST since 1963, 2237177591Sedwin# while Shanks (and tzdata) has 1965 as the first date (except in the 2238177591Sedwin# 1940's). Many other web pages in Cuba also claim that it has been 2239177591Sedwin# observed since 1963, but with the exception of 1970 - an exception 2240177591Sedwin# which is not present in tzdata/Shanks. So there is a chance we need to 2241177591Sedwin# change some historic records as well. 2242177591Sedwin# 2243177591Sedwin# One example: 2244177591Sedwin# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> 2245177591Sedwin# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2246177591Sedwin# </a> 2247177591Sedwin 2248177591Sedwin# From Jesper Norgaard Welen (2008-03-13): 2249177591Sedwin# The Cuban time change has just been confirmed on the most authoritative 2250177591Sedwin# web site, the Granma. Please check out 2251177591Sedwin# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> 2252177591Sedwin# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2253177591Sedwin# </a> 2254177591Sedwin# 2255177591Sedwin# Basically as expected after Steffen Thorsens information, the change 2256177591Sedwin# will take place midnight between Saturday and Sunday. 2257177591Sedwin 2258177591Sedwin# From Arthur David Olson (2008-03-12): 2259177591Sedwin# Assume Sun>=15 (third Sunday) going forward. 2260177591Sedwin 22612742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 22622742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 22632742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 22642742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 22652742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 22662742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 22672742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 22682742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 22692742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 22702742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 22712742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 22722742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 22732742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 22742742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 22752742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 22762742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 22772742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 22782742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 22792742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 228030711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 22812742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 22822742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 22832742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 228443014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 228520094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 228643014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 228743014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 228858787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2289138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2290187588SedwinRule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D 2291173319SedwinRule Cuba 2006 max - Oct lastSun 0:00s 0 S 2292177591SedwinRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2293177591SedwinRule Cuba 2008 max - Mar Sun>=15 0:00s 1:00 D 22942742Swollman 22952742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 22962742SwollmanZone America/Havana -5:29:28 - LMT 1890 229758787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 22982742Swollman -5:00 Cuba C%sT 22992742Swollman 23002742Swollman# Dominica 23012742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23022742SwollmanZone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 23032742Swollman -4:00 - AST 23042742Swollman 23052742Swollman# Dominican Republic 230675267Swollman 230775267Swollman# From Steffen Thorsen (2000-10-30): 230875267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 230975267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 231075267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 231175267Swollman 231275267Swollman# From Paul Eggert (2000-12-04): 231375267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 231475267Swollman 231575267Swollman# From Rives McDow (2000-12-01): 231675267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 231775267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 231875267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 231975267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 232075267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 232175267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 232275267Swollman# decided to revert. 232375267Swollman 232475267Swollman 23252742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23262742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 23272742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 23282742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 23292742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 23302742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 23312742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 23322742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23332742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 23342742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 23352742Swollman -5:00 DR E%sT 1974 Oct 27 233675267Swollman -4:00 - AST 2000 Oct 29 02:00 233775267Swollman -5:00 US E%sT 2000 Dec 3 01:00 23382742Swollman -4:00 - AST 23392742Swollman 23402742Swollman# El Salvador 2341158421Swollman 23422742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23432742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 23442742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 2345121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 2346121098Swollman# instead of America/San_Salvador. 23472742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23482742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 23492742Swollman -6:00 Salv C%sT 23502742Swollman 23512742Swollman# Grenada 23522742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 235319878SwollmanZone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 23542742Swollman -4:00 - AST 23552742Swollman 23562742Swollman# Guadeloupe 23572742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23582742SwollmanZone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 23592742Swollman -4:00 - AST 2360174242Sedwin# St Barthelemy 2361174242SedwinLink America/Guadeloupe America/St_Barthelemy 2362174242Sedwin# St Martin (French part) 2363174242SedwinLink America/Guadeloupe America/Marigot 23642742Swollman 23652742Swollman# Guatemala 2366158421Swollman# 2367158421Swollman# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2368158421Swollman# Diario Co Latino, at 2369158421Swollman# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2370158421Swollman# says in an article dated 2006-04-19 that the Guatemalan government had 2371158421Swollman# decided on that date to advance official time by 60 minutes, to lessen the 2372158421Swollman# impact of the elevated cost of oil.... Daylight saving time will last from 2373158421Swollman# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2374163302Sru# From Paul Eggert (2006-06-22): 2375163302Sru# The Ministry of Energy and Mines, press release CP-15/2006 2376163302Sru# (2006-04-19), says DST ends at 24:00. See 2377163302Sru# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2378163302Sru 23792742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23802742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 23812742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 23822742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 23832742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 238420094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 238520094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 2386158421SwollmanRule Guat 2006 only - Apr 30 0:00 1:00 D 2387158421SwollmanRule Guat 2006 only - Oct 1 0:00 0 S 23882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23892742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 23902742Swollman -6:00 Guat C%sT 23912742Swollman 23922742Swollman# Haiti 2393149514Swollman# From Gwillim Law (2005-04-15): 2394149514Swollman# Risto O. Nykanen wrote me that Haiti is now on DST. 2395149514Swollman# I searched for confirmation, and I found a 2396149514Swollman# <a href="http://www.haitianconsulate.org/time.doc"> press release 2397149514Swollman# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2398149514Swollman# </a>. Translated from French, it says: 2399149514Swollman# 2400149514Swollman# "The Prime Minister's Communication Office notifies the public in general 2401149514Swollman# and the press in particular that, following a decision of the Interior 2402149514Swollman# Ministry and the Territorial Collectivities [I suppose that means the 2403149514Swollman# provinces], Haiti will move to Eastern Daylight Time in the night from next 2404149514Swollman# Saturday the 2nd to Sunday the 3rd. 2405149514Swollman# 2406149514Swollman# "Consequently, the Prime Minister's Communication Office wishes to inform 2407149514Swollman# the population that the country's clocks will be set forward one hour 2408149514Swollman# starting at midnight. This provision will hold until the last Saturday in 2409149514Swollman# October 2005. 2410149514Swollman# 2411149514Swollman# "Port-au-Prince, March 31, 2005" 2412158421Swollman# 2413158421Swollman# From Steffen Thorsen (2006-04-04): 2414158421Swollman# I have been informed by users that Haiti observes DST this year like 2415158421Swollman# last year, so the current "only" rule for 2005 might be changed to a 2416158421Swollman# "max" rule or to last until 2006. (Who knows if they will observe DST 2417158421Swollman# next year or if they will extend their DST like US/Canada next year). 2418158421Swollman# 2419158421Swollman# I have found this article about it (in French): 2420158421Swollman# http://www.haitipressnetwork.com/news.cfm?articleID=7612 2421158421Swollman# 2422158421Swollman# The reason seems to be an energy crisis. 2423149514Swollman 2424169811Swollman# From Stephen Colebourne (2007-02-22): 2425169811Swollman# Some IATA info: Haiti won't be having DST in 2007. 2426158421Swollman 2427169811Swollman 24282742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 24292742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 24302742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 24312742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2432158421Swollman# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2433158421Swollman# Go with IATA. 243443014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 243543014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2436169811SwollmanRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 2437169811SwollmanRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 24382742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24392742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 24402742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 24412742Swollman -5:00 Haiti E%sT 24422742Swollman 24432742Swollman# Honduras 2444158421Swollman# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2445158421Swollman 2446158421Swollman# From Paul Eggert (2006-05-05): 2447158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2448158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 2449158421Swollman# months until September. La Tribuna reported today 2450158421Swollman# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2451163302Sru# of Honduras, refused to back down on this. 2452158421Swollman 2453163302Sru# From Jesper Norgaard Welen (2006-08-08): 2454163302Sru# It seems that Honduras has returned from DST to standard time this Monday at 2455163302Sru# 00:00 hours (prolonging Sunday to 25 hours duration). 2456163302Sru# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 2457163302Sru 2458163302Sru# From Paul Eggert (2006-08-08): 2459163302Sru# Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 2460163302Sru# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 2461163302Sru# It mentions executive decree 18-2006. 2462163302Sru 2463163302Sru# From Steffen Thorsen (2006-08-17): 2464163302Sru# Honduras will observe DST from 2007 to 2009, exact dates are not 2465163302Sru# published, I have located this authoritative source: 2466163302Sru# http://www.presidencia.gob.hn/noticia.aspx?nId=47 2467163302Sru 2468169811Swollman# From Steffen Thorsen (2007-03-30): 2469169811Swollman# http://www.laprensahn.com/pais_nota.php?id04962=7386 2470169811Swollman# So it seems that Honduras will not enter DST this year.... 2471169811Swollman 2472158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2473158421SwollmanRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 2474158421SwollmanRule Hond 1987 1988 - Sep lastSun 0:00 0 S 2475169811SwollmanRule Hond 2006 only - May Sun>=1 0:00 1:00 D 2476169811SwollmanRule Hond 2006 only - Aug Mon>=1 0:00 0 S 24772742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24782742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 2479158421Swollman -6:00 Hond C%sT 248043543Swollman# 248143543Swollman# Great Swan I ceded by US to Honduras in 1972 24822742Swollman 24832742Swollman# Jamaica 24842742Swollman 248519878Swollman# From Bob Devine (1988-01-28): 24862742Swollman# Follows US rules. 24872742Swollman 248819878Swollman# From U. S. Naval Observatory (1989-01-19): 24892742Swollman# JAMAICA 5 H BEHIND UTC 24902742Swollman 2491158421Swollman# From Shanks & Pottenger: 24922742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24932742SwollmanZone America/Jamaica -5:07:12 - LMT 1890 # Kingston 249443014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 249558787Sru -5:00 - EST 1974 Apr 28 2:00 249620094Swollman -5:00 US E%sT 1984 249720094Swollman -5:00 - EST 24982742Swollman 24992742Swollman# Martinique 25002742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25012742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 250286222Swollman -4:04:20 - FFMT 1911 May # Fort-de-France MT 25032742Swollman -4:00 - AST 1980 Apr 6 25042742Swollman -4:00 1:00 ADT 1980 Sep 28 25052742Swollman -4:00 - AST 25062742Swollman 25072742Swollman# Montserrat 2508158421Swollman# From Paul Eggert (2006-03-22): 2509158421Swollman# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. 2510158421Swollman# world.gazetteer.com says Cork Hill is the most populous location now. 25112742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2512158421SwollmanZone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill 25132742Swollman -4:00 - AST 25142742Swollman 25152742Swollman# Nicaragua 251643543Swollman# 2517158421Swollman# This uses Shanks & Pottenger for times before 2005. 251843543Swollman# 2519149514Swollman# From Steffen Thorsen (2005-04-12): 2520149514Swollman# I've got reports from 8 different people that Nicaragua just started 2521149514Swollman# DST on Sunday 2005-04-10, in order to save energy because of 2522149514Swollman# expensive petroleum. The exact end date for DST is not yet 2523149514Swollman# announced, only "September" but some sites also say "mid-September". 2524149514Swollman# Some background information is available on the President's official site: 2525149514Swollman# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 2526149514Swollman# The Decree, no 23-2005 is available here: 2527149514Swollman# 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 2528149514Swollman# 2529149514Swollman# From Paul Eggert (2005-05-01): 2530149514Swollman# The decree doesn't say anything about daylight saving, but for now let's 2531158421Swollman# assume that it is daylight saving.... 2532149514Swollman# 2533149514Swollman# From Gwillim Law (2005-04-21): 2534149514Swollman# The Associated Press story on the time change, which can be found at 2535149514Swollman# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 2536149514Swollman# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 2537149514Swollman# time that a change of clocks was applied to save energy was in the year 2000 2538149514Swollman# during the Arnoldo Aleman administration."... 2539149514Swollman# The northamerica file says that Nicaragua has been on UTC-6 continuously 2540149514Swollman# since December 1998. I wasn't able to find any details of Nicaraguan time 2541149514Swollman# changes in 2000. Perhaps a note could be added to the northamerica file, to 2542149514Swollman# the effect that we have indirect evidence that DST was observed in 2000. 2543149514Swollman# 2544153670Swollman# From Jesper Norgaard Welen (2005-11-02): 2545153670Swollman# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 2546153670Swollman# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 2547153670Swollman# (2005-09-26) 2548153670Swollman# 2549158421Swollman# From Jesper Norgaard Welen (2006-05-05): 2550158421Swollman# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 2551158421Swollman# (my informal translation) 2552158421Swollman# By order of the president of the republic, Enrique Bolanos, Nicaragua 2553158421Swollman# advanced by sixty minutes their official time, yesterday at 2 in the 2554158421Swollman# morning, and will stay that way until 30.th. of september. 2555158421Swollman# 2556163302Sru# From Jesper Norgaard Welen (2006-09-30): 2557163302Sru# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 2558163302Sru# My informal translation runs: 2559163302Sru# The natural sun time is restored in all the national territory, in that the 2560163302Sru# time is returned one hour at 01:00 am of October 1 of 2006. 2561163302Sru# 25622742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25632742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 25642742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 2565149514SwollmanRule Nic 2005 only - Apr 10 0:00 1:00 D 2566163302SruRule Nic 2005 only - Oct Sun>=1 0:00 0 S 2567158421SwollmanRule Nic 2006 only - Apr 30 2:00 1:00 D 2568163302SruRule Nic 2006 only - Oct Sun>=1 1:00 0 S 25692742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25702742SwollmanZone America/Managua -5:45:08 - LMT 1890 257186222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 25722742Swollman -6:00 - CST 1973 May 25732742Swollman -5:00 - EST 1975 Feb 16 2574158421Swollman -6:00 Nic C%sT 1992 Jan 1 4:00 2575158421Swollman -5:00 - EST 1992 Sep 24 2576158421Swollman -6:00 - CST 1993 2577158421Swollman -5:00 - EST 1997 2578149514Swollman -6:00 Nic C%sT 25792742Swollman 25802742Swollman# Panama 25812742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25822742SwollmanZone America/Panama -5:18:08 - LMT 1890 258386222Swollman -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 25842742Swollman -5:00 - EST 25852742Swollman 25862742Swollman# Puerto Rico 25872742Swollman# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 25882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 258914343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 25902742Swollman -4:00 - AST 1942 May 3 2591158421Swollman -4:00 US A%sT 1946 25922742Swollman -4:00 - AST 25932742Swollman 25942742Swollman# St Kitts-Nevis 25952742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25962742SwollmanZone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 25972742Swollman -4:00 - AST 25982742Swollman 25992742Swollman# St Lucia 26002742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26012742SwollmanZone America/St_Lucia -4:04:00 - LMT 1890 # Castries 260286222Swollman -4:04:00 - CMT 1912 # Castries Mean Time 26032742Swollman -4:00 - AST 26042742Swollman 26052742Swollman# St Pierre and Miquelon 26062742Swollman# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 26072742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26082742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 26092742Swollman -4:00 - AST 1980 May 2610121098Swollman -3:00 - PMST 1987 # Pierre & Miquelon Time 2611121098Swollman -3:00 Canada PM%sT 26122742Swollman 26132742Swollman# St Vincent and the Grenadines 26142742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26152742SwollmanZone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 261643014Swollman -4:04:56 - KMT 1912 # Kingstown Mean Time 26172742Swollman -4:00 - AST 26182742Swollman 26192742Swollman# Turks and Caicos 2620169811Swollman# 2621169811Swollman# From Chris Dunn in 2622169811Swollman# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 2623169811Swollman# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 2624169811Swollman# daylight saving dates for time changes have been adjusted to match 2625169811Swollman# the recent U.S. change of dates. 2626169811Swollman# 2627169811Swollman# From Brian Inglis (2007-04-28): 2628169811Swollman# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 2629169811Swollman# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 2630169811Swollman# rows before that there is an out of date entry for Oct: 2631169811Swollman# "Eastern Standard Times Begins 2007 2632169811Swollman# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 2633169811Swollman# indicating that the normal ET rules are followed. 2634169811Swollman# 2635169811Swollman# From Paul Eggert (2006-05-01): 2636158421Swollman# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 2637169811Swollman# says they switch at midnight. Go with Shanks & Pottenger. 2638169811Swollman# 263920094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2640169811SwollmanRule TC 1979 1986 - Apr lastSun 2:00 1:00 D 2641169811SwollmanRule TC 1979 2006 - Oct lastSun 2:00 0 S 2642169811SwollmanRule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 2643169811SwollmanRule TC 2007 max - Mar Sun>=8 2:00 1:00 D 2644169811SwollmanRule TC 2007 max - Nov Sun>=1 2:00 0 S 26452742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26462742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 264743014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 264820094Swollman -5:00 TC E%sT 26498029Swollman 265014343Swollman# British Virgin Is 26512742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 265214343SwollmanZone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 26532742Swollman -4:00 - AST 26548029Swollman 265514343Swollman# Virgin Is 265614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 265714343SwollmanZone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 265814343Swollman -4:00 - AST 2659