1 # 2 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 # 4 # This code is free software; you can redistribute it and/or modify it 5 # under the terms of the GNU General Public License version 2 only, as 6 # published by the Free Software Foundation. Oracle designates this 7 # particular file as subject to the "Classpath" exception as provided 8 # by Oracle in the LICENSE file that accompanied this code. 9 # 10 # This code is distributed in the hope that it will be useful, but WITHOUT 11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 # version 2 for more details (a copy is included in the LICENSE file that 14 # accompanied this code). 15 # 16 # You should have received a copy of the GNU General Public License version 17 # 2 along with this work; if not, write to the Free Software Foundation, 18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 # 20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 # or visit www.oracle.com if you need additional information or have any 22 # questions. 23 # 24 # This file is in the public domain, so clarified as of 25 # 2009-05-17 by Arthur David Olson. 26 27 # also includes Central America and the Caribbean 28 29 # This file is by no means authoritative; if you think you know better, 30 # go ahead and edit the file (and please send any changes to 31 # tz@iana.org for general use in the future). For more, please see 32 # the file CONTRIBUTING in the tz distribution. 33 34 # From Paul Eggert (1999-03-22): 35 # A reliable and entertaining source about time zones is 36 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 37 38 ############################################################################### 39 40 # United States 41 42 # From Paul Eggert (1999-03-31): 43 # Howse writes (pp 121-125) that time zones were invented by 44 # Professor Charles Ferdinand Dowd (1825-1904), 45 # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 46 # His pamphlet "A System of National Time for Railroads" (1870) 47 # was the result of his proposals at the Convention of Railroad Trunk Lines 48 # in New York City (1869-10). His 1870 proposal was based on Washington, DC, 49 # but in 1872-05 he moved the proposed origin to Greenwich. 50 # His proposal was adopted by the railroads on 1883-11-18 at 12:00, 51 # and the most of the country soon followed suit. 52 53 # From Paul Eggert (2005-04-16): 54 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 55 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 56 57 # From Paul Eggert (2006-03-22): 58 # A good source for time zone historical data in the US is 59 # Thomas G. Shanks, The American Atlas (5th edition), 60 # San Diego: ACS Publications, Inc. (1991). 61 # Make sure you have the errata sheet; the book is somewhat useless without it. 62 # It is the source for most of the pre-1991 US entries below. 63 64 # From Paul Eggert (2001-03-06): 65 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin 66 # in his whimsical essay "An Economical Project for Diminishing the Cost 67 # of Light" published in the Journal de Paris (1784-04-26). 68 # Not everyone is happy with the results: 69 # 70 # I don't really care how time is reckoned so long as there is some 71 # agreement about it, but I object to being told that I am saving 72 # daylight when my reason tells me that I am doing nothing of the kind. 73 # I even object to the implication that I am wasting something 74 # valuable if I stay in bed after the sun has risen. As an admirer 75 # of moonlight I resent the bossy insistence of those who want to 76 # reduce my time for enjoying it. At the back of the Daylight Saving 77 # scheme I detect the bony, blue-fingered hand of Puritanism, eager 78 # to push people into bed earlier, and get them up earlier, to make 79 # them healthy, wealthy and wise in spite of themselves. 80 # 81 # -- Robertson Davies, The diary of Samuel Marchbanks, 82 # Clarke, Irwin (1947), XIX, Sunday 83 # 84 # For more about the first ten years of DST in the United States, see 85 # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 86 # (Carnegie Library of Pittsburgh, 1927). 87 # http://www.clpgh.org/exhibit/dst.html 88 # 89 # Shanks says that DST was called "War Time" in the US in 1918 and 1919. 90 # However, DST was imposed by the Standard Time Act of 1918, which 91 # was the first nationwide legal time standard, and apparently 92 # time was just called "Standard Time" or "Daylight Saving Time". 93 94 # From Arthur David Olson: 95 # US Daylight Saving Time ended on the last Sunday of *October* in 1974. 96 # See, for example, the front page of the Saturday, 1974-10-26 97 # and Sunday, 1974-10-27 editions of the Washington Post. 98 99 # From Arthur David Olson: 100 # Before the Uniform Time Act of 1966 took effect in 1967, observance of 101 # Daylight Saving Time in the US was by local option, except during wartime. 102 103 # From Arthur David Olson (2000-09-25): 104 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 105 # In the introduction, Oboler spoke of "Eastern Peace Time." 106 # An AltaVista search turned up: 107 # http://rowayton.org/rhs/hstaug45.html 108 # "When the time is announced over the radio now, it is 'Eastern Peace 109 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 110 # (August 1945) by way of confirmation. 111 112 # From Joseph Gallant citing 113 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 114 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 115 # to switch to London for Attlee's address, but the American people 116 # never got to hear his speech live. According to one press account, 117 # CBS' Bob Trout was first to announce the word of Japan's surrender, 118 # but a few seconds later, NBC, ABC and Mutual also flashed the word 119 # of surrender, all of whom interrupting the bells of Big Ben in 120 # London which were to precede Mr. Attlee's speech. 121 122 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 123 # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 124 # 125 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 126 # Any announcement from Asia would reach St. John's New York newsroom on a 127 # wire service teletype machine, which had prescribed signals for major news. 128 # Associated Press, for example, would ring five bells before spewing out 129 # typed copy of an important story, and 10 bells for news "of transcendental 130 # importance." 131 # 132 # On Aug. 14, stalling while talking steadily into the NBC networks' open 133 # microphone, St. John heard five bells and waited only to hear a sixth bell, 134 # before announcing confidently: "Ladies and gentlemen, World War II is over. 135 # The Japanese have agreed to our surrender terms." 136 # 137 # He had scored a 20-second scoop on other broadcasters. 138 139 # From Arthur David Olson (2005-08-22): 140 # Paul has been careful to use the "US" rules only in those locations 141 # that are part of the United States; this reflects the real scope of 142 # U.S. government action. So even though the "US" rules have changed 143 # in the latest release, other countries won't be affected. 144 145 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 146 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 147 Rule US 1918 1919 - Oct lastSun 2:00 0 S 148 Rule US 1942 only - Feb 9 2:00 1:00 W # War 149 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 150 Rule US 1945 only - Sep 30 2:00 0 S 151 Rule US 1967 2006 - Oct lastSun 2:00 0 S 152 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 153 Rule US 1974 only - Jan 6 2:00 1:00 D 154 Rule US 1975 only - Feb 23 2:00 1:00 D 155 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 156 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 157 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 158 Rule US 2007 max - Nov Sun>=1 2:00 0 S 159 160 # From Arthur David Olson, 2005-12-19 161 # We generate the files specified below to guard against old files with 162 # obsolete information being left in the time zone binary directory. 163 # We limit the list to names that have appeared in previous versions of 164 # this time zone package. 165 # We do these as separate Zones rather than as Links to avoid problems if 166 # a particular place changes whether it observes DST. 167 # We put these specifications here in the northamerica file both to 168 # increase the chances that they'll actually get compiled and to 169 # avoid the need to duplicate the US rules in another file. 170 171 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 172 Zone EST -5:00 - EST 173 Zone MST -7:00 - MST 174 Zone HST -10:00 - HST 175 Zone EST5EDT -5:00 US E%sT 176 Zone CST6CDT -6:00 US C%sT 177 Zone MST7MDT -7:00 US M%sT 178 Zone PST8PDT -8:00 US P%sT 179 180 # From Bob Devine (1988-01-28): 181 # ...Alaska (and Hawaii) had the timezone names changed in 1967. 182 # old new 183 # Pacific Standard Time(PST) -same- 184 # Yukon Standard Time(YST) -same- 185 # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 186 # Nome Standard Time (NT) Bering Standard Time (BST) 187 # 188 # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 189 # The YST zone now covers nearly all of the state, AHST just part 190 # of the Aleutian islands. No DST. 191 192 # From Paul Eggert (1995-12-19): 193 # The tables below use 'NST', not 'NT', for Nome Standard Time. 194 # I invented 'CAWT' for Central Alaska War Time. 195 196 # From U. S. Naval Observatory (1989-01-19): 197 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 198 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 199 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 200 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 201 # USA MOUNTAIN 7 H BEHIND UTC DENVER 202 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 203 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 204 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 205 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 206 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 207 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 208 # USA " 9 H BEHIND UTC APR 3 - OCT 30 209 # USA HAWAII 10 H BEHIND UTC 210 # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 211 212 # From Arthur David Olson (1989-01-21): 213 # The above dates are for 1988. 214 # Note the "AKST" and "AKDT" abbreviations, the claim that there's 215 # no DST in Samoa, and the claim that there is DST in Alaska and the 216 # Aleutians. 217 218 # From Arthur David Olson (1988-02-13): 219 # Legal standard time zone names, from United States Code (1982 Edition and 220 # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 221 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 222 # took effect), as explained in sections 263 and 261: 223 # (none) 224 # United States standard eastern time 225 # United States standard mountain time 226 # United States standard central time 227 # United States standard Pacific time 228 # (none) 229 # United States standard Alaska time 230 # (none) 231 # Next, names from 1967-04-01 until 1983-11-30 (the date for 232 # public law 98-181): 233 # Atlantic standard time 234 # eastern standard time 235 # central standard time 236 # mountain standard time 237 # Pacific standard time 238 # Yukon standard time 239 # Alaska-Hawaii standard time 240 # Bering standard time 241 # And after 1983-11-30: 242 # Atlantic standard time 243 # eastern standard time 244 # central standard time 245 # mountain standard time 246 # Pacific standard time 247 # Alaska standard time 248 # Hawaii-Aleutian standard time 249 # Samoa standard time 250 # The law doesn't give abbreviations. 251 # 252 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 253 # Public law 106-564 (2000-12-23) introduced the abbreviation 254 # "Chamorro Standard Time" for time in Guam and the Northern Marianas. 255 # See the file "australasia". 256 257 # From Arthur David Olson, 2005-08-09 258 # The following was signed into law on 2005-08-08. 259 # 260 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 261 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 262 # U.S.C. 260a(a)) is amended-- 263 # (1) by striking "first Sunday of April" and inserting "second 264 # Sunday of March"; and 265 # (2) by striking "last Sunday of October" and inserting "first 266 # Sunday of November'. 267 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the 268 # date of enactment of this Act or March 1, 2007, whichever is later. 269 # (c) Report to Congress.--Not later than 9 months after the effective 270 # date stated in subsection (b), the Secretary shall report to Congress 271 # on the impact of this section on energy consumption in the United 272 # States. 273 # (d) Right to Revert.--Congress retains the right to revert the 274 # Daylight Saving Time back to the 2005 time schedules once the 275 # Department study is complete. 276 277 # US eastern time, represented by New York 278 279 # Connecticut, Delaware, District of Columbia, most of Florida, 280 # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 281 # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 282 # New Hampshire, New Jersey, New York, North Carolina, Ohio, 283 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 284 # Vermont, Virginia, West Virginia 285 286 # From Dave Cantor (2004-11-02): 287 # Early this summer I had the occasion to visit the Mount Washington 288 # Observatory weather station atop (of course!) Mount Washington [, NH].... 289 # One of the staff members said that the station was on Eastern Standard Time 290 # and didn't change their clocks for Daylight Saving ... so that their 291 # reports will always have times which are 5 hours behind UTC. 292 293 # From Paul Eggert (2005-08-26): 294 # According to today's Huntsville Times 295 # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 296 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City 297 # in Russell County, Lanett in Chambers County and some towns in Lee County, 298 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 299 # Roberts, city administrator in Phenix City. as saying "We are in the Central 300 # time zone, but we do go by the Eastern time zone because so many people work 301 # in Columbus." 302 303 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 304 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 305 Rule NYC 1920 only - Oct lastSun 2:00 0 S 306 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 307 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 308 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 309 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 310 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 311 -5:00 US E%sT 1920 312 -5:00 NYC E%sT 1942 313 -5:00 US E%sT 1946 314 -5:00 NYC E%sT 1967 315 -5:00 US E%sT 316 317 # US central time, represented by Chicago 318 319 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 320 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 321 # Washington counties), Illinois, western Indiana 322 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 323 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 324 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 325 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 326 # western Tennessee, most of Texas, Wisconsin 327 328 # From Larry M. Smith (2006-04-26) re Wisconsin: 329 # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 330 # is currently enforced at the 01:00 time of change. Because the local 331 # "bar time" in the state corresponds to 02:00, a number of citations 332 # are issued for the "sale of class 'B' alcohol after prohibited 333 # hours" within the deviated hour of this change every year.... 334 # 335 # From Douglas R. Bomberg (2007-03-12): 336 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 337 # Statue 175 closer in synch with the US Congress' intent.... 338 # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 339 340 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 341 Rule Chicago 1920 only - Jun 13 2:00 1:00 D 342 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 343 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 344 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 345 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 346 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 347 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 348 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 349 -6:00 US C%sT 1920 350 -6:00 Chicago C%sT 1936 Mar 1 2:00 351 -5:00 - EST 1936 Nov 15 2:00 352 -6:00 Chicago C%sT 1942 353 -6:00 US C%sT 1946 354 -6:00 Chicago C%sT 1967 355 -6:00 US C%sT 356 # Oliver County, ND switched from mountain to central time on 1992-10-25. 357 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 358 -7:00 US M%sT 1992 Oct 25 2:00 359 -6:00 US C%sT 360 # Morton County, ND, switched from mountain to central time on 361 # 2003-10-26, except for the area around Mandan which was already central time. 362 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 363 # Officially this switch also included part of Sioux County, and 364 # Jones, Mellette, and Todd Counties in South Dakota; 365 # but in practice these other counties were already observing central time. 366 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 367 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 368 -7:00 US M%sT 2003 Oct 26 2:00 369 -6:00 US C%sT 370 371 # From Josh Findley (2011-01-21): 372 # ...it appears that Mercer County, North Dakota, changed from the 373 # mountain time zone to the central time zone at the last transition from 374 # daylight-saving to standard time (on Nov. 7, 2010): 375 # http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 376 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 377 378 # From Andy Lipscomb (2011-01-24): 379 # ...according to the Census Bureau, the largest city is Beulah (although 380 # it's commonly referred to as Beulah-Hazen, with Hazen being the next 381 # largest city in Mercer County). Google Maps places Beulah's city hall 382 # at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 383 # of 6h47'07". 384 385 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 386 -7:00 US M%sT 2010 Nov 7 2:00 387 -6:00 US C%sT 388 389 # US mountain time, represented by Denver 390 # 391 # Colorado, far western Kansas, Montana, western 392 # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 393 # New Mexico, southwestern North Dakota, 394 # western South Dakota, far western Texas (El Paso County, Hudspeth County, 395 # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 396 # 397 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 398 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 399 Rule Denver 1920 only - Oct lastSun 2:00 0 S 400 Rule Denver 1921 only - May 22 2:00 0 S 401 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 402 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 403 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 404 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 405 -7:00 US M%sT 1920 406 -7:00 Denver M%sT 1942 407 -7:00 US M%sT 1946 408 -7:00 Denver M%sT 1967 409 -7:00 US M%sT 410 411 # US Pacific time, represented by Los Angeles 412 # 413 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 414 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 415 # north of the Salmon River, and the towns of Burgdorf and Warren), 416 # Nevada (except West Wendover), Oregon (except the northern 3/4 of 417 # Malheur county), and Washington 418 # 419 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 420 Rule CA 1948 only - Mar 14 2:00 1:00 D 421 Rule CA 1949 only - Jan 1 2:00 0 S 422 Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 423 Rule CA 1950 1961 - Sep lastSun 2:00 0 S 424 Rule CA 1962 1966 - Oct lastSun 2:00 0 S 425 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 426 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 427 -8:00 US P%sT 1946 428 -8:00 CA P%sT 1967 429 -8:00 US P%sT 430 431 # Alaska 432 # AK%sT is the modern abbreviation for -9:00 per USNO. 433 # 434 # From Paul Eggert (2001-05-30): 435 # Howse writes that Alaska switched from the Julian to the Gregorian calendar, 436 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 437 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 438 # also a Friday. Include only the time zone part of this transition, 439 # ignoring the switch from Julian to Gregorian, since we can't represent 440 # the Julian calendar. 441 # 442 # As far as we know, none of the exact locations mentioned below were 443 # permanently inhabited in 1867 by anyone using either calendar. 444 # (Yakutat was colonized by the Russians in 1799, but the settlement 445 # was destroyed in 1805 by a Yakutat-kon war party.) However, there 446 # were nearby inhabitants in some cases and for our purposes perhaps 447 # it's best to simply use the official transition. 448 449 # From Paul Eggert (2014-07-18): 450 # One opinion of the early-1980s turmoil in Alaska over time zones and 451 # daylight saving time appeared as graffiti on a Juneau airport wall: 452 # "Welcome to Juneau. Please turn your watch back to the 19th century." 453 # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 454 # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 455 # 456 # Steve Ferguson (2011-01-31) referred to the following source: 457 # Norris F. Keeping time in Alaska: national directives, local response. 458 # Alaska History 2001;16(1-2). 459 # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 460 461 # From Arthur David Olson (2011-02-01): 462 # Here's database-relevant material from the 2001 "Alaska History" article: 463 # 464 # On September 20 [1979]...DOT...officials decreed that on April 27, 465 # 1980, Juneau and other nearby communities would move to Yukon Time. 466 # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 467 # Pacific Time. 468 # 469 # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 470 # Department's September 1979 decision. Juneau and other communities in 471 # northern Southeast reverted to Pacific Time on October 26. 472 # 473 # On October 28 [1983]...the Metlakatla Indian Community Council voted 474 # unanimously to keep the reservation on Pacific Time. 475 # 476 # According to DOT official Joanne Petrie, Indian reservations are not 477 # bound to follow time zones imposed by neighboring jurisdictions. 478 # 479 # (The last is consistent with how the database now handles the Navajo 480 # Nation.) 481 482 # From Arthur David Olson (2011-02-09): 483 # I just spoke by phone with a staff member at the Metlakatla Indian 484 # Community office (using contact information available at 485 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 486 # It's shortly after 1:00 here on the east coast of the United States; 487 # the staffer said it was shortly after 10:00 there. When I asked whether 488 # that meant they were on Pacific time, they said no - they were on their 489 # own time. I asked about daylight saving; they said it wasn't used. I 490 # did not inquire about practices in the past. 491 492 # From Arthur David Olson (2011-08-17): 493 # For lack of better information, assume that Metlakatla's 494 # abandonment of use of daylight saving resulted from the 1983 vote. 495 496 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 497 Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 498 -8:57:41 - LMT 1900 Aug 20 12:00 499 -8:00 - PST 1942 500 -8:00 US P%sT 1946 501 -8:00 - PST 1969 502 -8:00 US P%sT 1980 Apr 27 2:00 503 -9:00 US Y%sT 1980 Oct 26 2:00 504 -8:00 US P%sT 1983 Oct 30 2:00 505 -9:00 US Y%sT 1983 Nov 30 506 -9:00 US AK%sT 507 Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 508 -9:01:13 - LMT 1900 Aug 20 12:00 509 -8:00 - PST 1942 510 -8:00 US P%sT 1946 511 -8:00 - PST 1969 512 -8:00 US P%sT 1983 Oct 30 2:00 513 -9:00 US Y%sT 1983 Nov 30 514 -9:00 US AK%sT 515 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 516 -8:46:18 - LMT 1900 Aug 20 12:00 517 -8:00 - PST 1942 518 -8:00 US P%sT 1946 519 -8:00 - PST 1969 520 -8:00 US P%sT 1983 Oct 30 2:00 521 -8:00 - PST 522 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 523 -9:18:55 - LMT 1900 Aug 20 12:00 524 -9:00 - YST 1942 525 -9:00 US Y%sT 1946 526 -9:00 - YST 1969 527 -9:00 US Y%sT 1983 Nov 30 528 -9:00 US AK%sT 529 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 530 -9:59:36 - LMT 1900 Aug 20 12:00 531 -10:00 - CAT 1942 532 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 533 -10:00 US CAT/CAPT 1946 # Peace 534 -10:00 - CAT 1967 Apr 535 -10:00 - AHST 1969 536 -10:00 US AH%sT 1983 Oct 30 2:00 537 -9:00 US Y%sT 1983 Nov 30 538 -9:00 US AK%sT 539 Zone America/Nome 12:58:21 - LMT 1867 Oct 18 540 -11:01:38 - LMT 1900 Aug 20 12:00 541 -11:00 - NST 1942 542 -11:00 US N%sT 1946 543 -11:00 - NST 1967 Apr 544 -11:00 - BST 1969 545 -11:00 US B%sT 1983 Oct 30 2:00 546 -9:00 US Y%sT 1983 Nov 30 547 -9:00 US AK%sT 548 Zone America/Adak 12:13:21 - LMT 1867 Oct 18 549 -11:46:38 - LMT 1900 Aug 20 12:00 550 -11:00 - NST 1942 551 -11:00 US N%sT 1946 552 -11:00 - NST 1967 Apr 553 -11:00 - BST 1969 554 -11:00 US B%sT 1983 Oct 30 2:00 555 -10:00 US AH%sT 1983 Nov 30 556 -10:00 US HA%sT 557 # The following switches don't quite make our 1970 cutoff. 558 # 559 # Shanks writes that part of southwest Alaska (e.g. Aniak) 560 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 561 # and another part (e.g. Akiak) made the same switch five weeks later. 562 # 563 # From David Flater (2004-11-09): 564 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 565 # Historic Preservation Commission, provided this information, which 566 # suggests that Unalaska deviated from statutory time from early 1967 567 # possibly until 1983: 568 # 569 # Minutes of the Unalaska City Council Meeting, January 10, 1967: 570 # "Except for St. Paul and Akutan, Unalaska is the only important 571 # location not on Alaska Standard Time. The following resolution was 572 # made by William Robinson and seconded by Henry Swanson: Be it 573 # resolved that the City of Unalaska hereby goes to Alaska Standard 574 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 575 # January 14, Alaska Standard Time.) This resolution was passed with 576 # three votes for and one against." 577 578 # Hawaii 579 580 # From Arthur David Olson (2010-12-09): 581 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 582 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 583 # the article is available at 584 # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 585 # and indicates that standard time was adopted effective noon, January 586 # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 587 # saving for the period between the last Sunday of each April and the 588 # last Sunday of each September, but less than a month later repealed the 589 # act," (page 220), that year-round daylight saving time was in effect 590 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 591 # when clocks changed) and that clocks were changed by 30 minutes 592 # effective the second Sunday of June, 1947 (page 219, with no time of 593 # day given for when clocks changed). A footnote for the 1933 changes 594 # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 595 # and Act 163 (approved 21 May 1933)." 596 597 # From Arthur David Olson (2011-01-19): 598 # The following is from "Laws of the Territory of Hawaii Passed by the 599 # Seventeenth Legislature: Regular Session 1933," available (as of 600 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act 601 # 90...At 2 o'clock ante meridian of the last Sunday in April of each 602 # year, the standard time of this Territory shall be advanced one 603 # hour...This Act shall take effect upon its approval. Approved this 26th 604 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 605 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 606 # hereby repealed...This Act shall take effect upon its approval, upon 607 # which date the standard time of this Territory shall be restored to 608 # that existing immediately prior to the taking effect of said Act 90. 609 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 610 # of the Territory of Hawaii." 611 # 612 # Note that 1933-05-21 was a Sunday. 613 # We're left to guess the time of day when Act 163 was approved; guess noon. 614 615 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 616 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 617 -10:30 - HST 1933 Apr 30 2:00 618 -10:30 1:00 HDT 1933 May 21 12:00 619 -10:30 - HST 1942 Feb 9 2:00 620 -10:30 1:00 HDT 1945 Sep 30 2:00 621 -10:30 - HST 1947 Jun 8 2:00 622 -10:00 - HST 623 Link Pacific/Honolulu Pacific/Johnston 624 625 # Now we turn to US areas that have diverged from the consensus since 1970. 626 627 # Arizona mostly uses MST. 628 629 # From Paul Eggert (2002-10-20): 630 # 631 # The information in the rest of this paragraph is derived from the 632 # Daylight Saving Time web page 633 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 634 # maintained by the Arizona State Library, Archives and Public Records. 635 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 636 # time, but by federal law railroads, airlines, bus lines, military 637 # personnel, and some engaged in interstate commerce continued to 638 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 639 # Gazette says that was the date the law changed, and that 04-01 was 640 # the date the state's clocks would change. In 1945 the State of 641 # Arizona used standard time all year, again with exceptions only as 642 # mandated by federal law. Arizona observed DST in 1967, but Arizona 643 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 644 # 645 # Shanks says the 1944 experiment came to an end on 1944-03-17. 646 # Go with the Arizona State Library instead. 647 648 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 649 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 650 -7:00 US M%sT 1944 Jan 1 0:01 651 -7:00 - MST 1944 Apr 1 0:01 652 -7:00 US M%sT 1944 Oct 1 0:01 653 -7:00 - MST 1967 654 -7:00 US M%sT 1968 Mar 21 655 -7:00 - MST 656 # From Arthur David Olson (1988-02-13): 657 # A writer from the Inter Tribal Council of Arizona, Inc., 658 # notes in private correspondence dated 1987-12-28 that "Presently, only the 659 # Navajo Nation participates in the Daylight Saving Time policy, due to its 660 # large size and location in three states." (The "only" means that other 661 # tribal nations don't use DST.) 662 # 663 # From Paul Eggert (2013-08-26): 664 # See America/Denver for a zone appropriate for the Navajo Nation. 665 666 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 667 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 668 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 669 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 670 # Teton, Twin Falls, Valley, Washington counties, and the southern 671 # quarter of Idaho county) and eastern Oregon (most of Malheur County) 672 # switched four weeks late in 1974. 673 # 674 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 675 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 676 -8:00 US P%sT 1923 May 13 2:00 677 -7:00 US M%sT 1974 678 -7:00 - MST 1974 Feb 3 2:00 679 -7:00 US M%sT 680 681 # Indiana 682 # 683 # For a map of Indiana's time zone regions, see: 684 # http://en.wikipedia.org/wiki/Time_in_Indiana 685 # 686 # From Paul Eggert (2007-08-17): 687 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 688 # with the following exceptions: 689 # 690 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 691 # Vanderburgh, and Warrick counties have been like America/Chicago. 692 # 693 # - Dearborn and Ohio counties have been like America/New_York. 694 # 695 # - Clark, Floyd, and Harrison counties have been like 696 # America/Kentucky/Louisville. 697 # 698 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 699 # and Switzerland counties have their own time zone histories as noted below. 700 # 701 # Shanks partitioned Indiana into 345 regions, each with its own time history, 702 # and wrote "Even newspaper reports present contradictory information." 703 # Those Hoosiers! Such a flighty and changeable people! 704 # Fortunately, most of the complexity occurred before our cutoff date of 1970. 705 # 706 # Other than Indianapolis, the Indiana place names are so nondescript 707 # that they would be ambiguous if we left them at the 'America' level. 708 # So we reluctantly put them all in a subdirectory 'America/Indiana'. 709 710 # From Paul Eggert (2014-06-26): 711 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 712 # says "DOT is relocating the time zone boundary in Indiana to move Starke, 713 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 714 # Eastern Time Zone to the Central Time Zone.... The effective date of 715 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 716 # changeover date from standard time to Daylight Saving Time." 717 # Strictly speaking, this meant the affected counties changed their 718 # clocks twice that night, but this obviously was in error. The intent 719 # was that 01:59:59 EST be followed by 02:00:00 CDT. 720 721 # From Gwillim Law (2007-02-10): 722 # The Associated Press has been reporting that Pulaski County, Indiana is 723 # going to switch from Central to Eastern Time on March 11, 2007.... 724 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 725 726 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 727 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 728 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 729 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 730 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 731 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 732 -6:00 US C%sT 1920 733 -6:00 Indianapolis C%sT 1942 734 -6:00 US C%sT 1946 735 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 736 -5:00 - EST 1957 Sep 29 2:00 737 -6:00 - CST 1958 Apr 27 2:00 738 -5:00 - EST 1969 739 -5:00 US E%sT 1971 740 -5:00 - EST 2006 741 -5:00 US E%sT 742 # 743 # Eastern Crawford County, Indiana, left its clocks alone in 1974, 744 # as well as from 1976 through 2005. 745 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 746 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 747 Rule Marengo 1951 only - Sep lastSun 2:00 0 S 748 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 749 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 750 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 751 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 752 -6:00 US C%sT 1951 753 -6:00 Marengo C%sT 1961 Apr 30 2:00 754 -5:00 - EST 1969 755 -5:00 US E%sT 1974 Jan 6 2:00 756 -6:00 1:00 CDT 1974 Oct 27 2:00 757 -5:00 US E%sT 1976 758 -5:00 - EST 2006 759 -5:00 US E%sT 760 # 761 # Daviess, Dubois, Knox, and Martin Counties, Indiana, 762 # switched from eastern to central time in April 2006, then switched back 763 # in November 2007. 764 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 765 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 766 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 767 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 768 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 769 Rule Vincennes 1955 only - May 1 0:00 1:00 D 770 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 771 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 772 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 773 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 774 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 775 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 776 -6:00 US C%sT 1946 777 -6:00 Vincennes C%sT 1964 Apr 26 2:00 778 -5:00 - EST 1969 779 -5:00 US E%sT 1971 780 -5:00 - EST 2006 Apr 2 2:00 781 -6:00 US C%sT 2007 Nov 4 2:00 782 -5:00 US E%sT 783 # 784 # Perry County, Indiana, switched from eastern to central time in April 2006. 785 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 786 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 787 Rule Perry 1946 only - Sep lastSun 2:00 0 S 788 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 789 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 790 Rule Perry 1955 only - May 1 0:00 1:00 D 791 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 792 Rule Perry 1960 only - Oct lastSun 2:00 0 S 793 Rule Perry 1961 only - Sep lastSun 2:00 0 S 794 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 795 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 796 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 797 -6:00 US C%sT 1946 798 -6:00 Perry C%sT 1964 Apr 26 2:00 799 -5:00 - EST 1969 800 -5:00 US E%sT 1971 801 -5:00 - EST 2006 Apr 2 2:00 802 -6:00 US C%sT 803 # 804 # Pike County, Indiana moved from central to eastern time in 1977, 805 # then switched back in 2006, then switched back again in 2007. 806 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 807 Rule Pike 1955 only - May 1 0:00 1:00 D 808 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 809 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 810 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 811 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 812 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 813 -6:00 US C%sT 1955 814 -6:00 Pike C%sT 1965 Apr 25 2:00 815 -5:00 - EST 1966 Oct 30 2:00 816 -6:00 US C%sT 1977 Oct 30 2:00 817 -5:00 - EST 2006 Apr 2 2:00 818 -6:00 US C%sT 2007 Nov 4 2:00 819 -5:00 US E%sT 820 # 821 # Starke County, Indiana moved from central to eastern time in 1991, 822 # then switched back in 2006. 823 # From Arthur David Olson (1991-10-28): 824 # An article on page A3 of the Sunday, 1991-10-27 Washington Post 825 # notes that Starke County switched from Central time to Eastern time as of 826 # 1991-10-27. 827 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 828 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 829 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 830 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 831 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 832 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 833 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 834 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 835 -6:00 US C%sT 1947 836 -6:00 Starke C%sT 1962 Apr 29 2:00 837 -5:00 - EST 1963 Oct 27 2:00 838 -6:00 US C%sT 1991 Oct 27 2:00 839 -5:00 - EST 2006 Apr 2 2:00 840 -6:00 US C%sT 841 # 842 # Pulaski County, Indiana, switched from eastern to central time in 843 # April 2006 and then switched back in March 2007. 844 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 845 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 846 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 847 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 848 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 849 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 850 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 851 -6:00 US C%sT 1946 852 -6:00 Pulaski C%sT 1961 Apr 30 2:00 853 -5:00 - EST 1969 854 -5:00 US E%sT 1971 855 -5:00 - EST 2006 Apr 2 2:00 856 -6:00 US C%sT 2007 Mar 11 2:00 857 -5:00 US E%sT 858 # 859 # Switzerland County, Indiana, did not observe DST from 1973 through 2005. 860 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 861 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 862 -6:00 US C%sT 1954 Apr 25 2:00 863 -5:00 - EST 1969 864 -5:00 US E%sT 1973 865 -5:00 - EST 2006 866 -5:00 US E%sT 867 868 # Part of Kentucky left its clocks alone in 1974. 869 # This also includes Clark, Floyd, and Harrison counties in Indiana. 870 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 871 Rule Louisville 1921 only - May 1 2:00 1:00 D 872 Rule Louisville 1921 only - Sep 1 2:00 0 S 873 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 874 Rule Louisville 1941 only - Sep lastSun 2:00 0 S 875 Rule Louisville 1946 only - Jun 2 2:00 0 S 876 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 877 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 878 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 879 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 880 -6:00 US C%sT 1921 881 -6:00 Louisville C%sT 1942 882 -6:00 US C%sT 1946 883 -6:00 Louisville C%sT 1961 Jul 23 2:00 884 -5:00 - EST 1968 885 -5:00 US E%sT 1974 Jan 6 2:00 886 -6:00 1:00 CDT 1974 Oct 27 2:00 887 -5:00 US E%sT 888 # 889 # Wayne County, Kentucky 890 # 891 # From Lake Cumberland LIFE 892 # http://www.lake-cumberland.com/life/archive/news990129time.shtml 893 # (1999-01-29) via WKYM-101.7: 894 # Clinton County has joined Wayne County in asking the DoT to change from 895 # the Central to the Eastern time zone.... The Wayne County government made 896 # the same request in December. And while Russell County officials have not 897 # taken action, the majority of respondents to a poll conducted there in 898 # August indicated they would like to change to "fast time" also. 899 # The three Lake Cumberland counties are the farthest east of any U.S. 900 # location in the Central time zone. 901 # 902 # From Rich Wales (2000-08-29): 903 # After prolonged debate, and despite continuing deep differences of opinion, 904 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 905 # (-0500) time. They won't "fall back" this year. See Sara Shipley, 906 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 907 # 908 # From Paul Eggert (2001-07-16): 909 # The final rule was published in the 910 # Federal Register 65, 160 (2000-08-17), pp 50154-50158. 911 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 912 # 913 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 914 -6:00 US C%sT 1946 915 -6:00 - CST 1968 916 -6:00 US C%sT 2000 Oct 29 2:00 917 -5:00 US E%sT 918 919 920 # From Rives McDow (2000-08-30): 921 # Here ... are all the changes in the US since 1985. 922 # Kearny County, KS (put all of county on central; 923 # previously split between MST and CST) ... 1990-10 924 # Starke County, IN (from CST to EST) ... 1991-10 925 # Oliver County, ND (from MST to CST) ... 1992-10 926 # West Wendover, NV (from PST TO MST) ... 1999-10 927 # Wayne County, KY (from CST to EST) ... 2000-10 928 # 929 # From Paul Eggert (2001-07-17): 930 # We don't know where the line used to be within Kearny County, KS, 931 # so omit that change for now. 932 # See America/Indiana/Knox for the Starke County, IN change. 933 # See America/North_Dakota/Center for the Oliver County, ND change. 934 # West Wendover, NV officially switched from Pacific to mountain time on 935 # 1999-10-31. See the 936 # Federal Register 64, 203 (1999-10-21), pp 56705-56707. 937 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 938 # However, the Federal Register says that West Wendover already operated 939 # on mountain time, and the rule merely made this official; 940 # hence a separate tz entry is not needed. 941 942 # Michigan 943 # 944 # From Bob Devine (1988-01-28): 945 # Michigan didn't observe DST from 1968 to 1973. 946 # 947 # From Paul Eggert (1999-03-31): 948 # Shanks writes that Michigan started using standard time on 1885-09-18, 949 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 950 # that Detroit kept 951 # 952 # local time until 1900 when the City Council decreed that clocks should 953 # be put back twenty-eight minutes to Central Standard Time. Half the 954 # city obeyed, half refused. After considerable debate, the decision 955 # was rescinded and the city reverted to Sun time. A derisive offer to 956 # erect a sundial in front of the city hall was referred to the 957 # Committee on Sewers. Then, in 1905, Central time was adopted 958 # by city vote. 959 # 960 # This story is too entertaining to be false, so go with Howse over Shanks. 961 # 962 # From Paul Eggert (2001-03-06): 963 # Garland (1927) writes "Cleveland and Detroit advanced their clocks 964 # one hour in 1914." This change is not in Shanks. We have no more 965 # info, so omit this for now. 966 # 967 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 968 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 969 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 970 Rule Detroit 1948 only - Sep lastSun 2:00 0 S 971 Rule Detroit 1967 only - Jun 14 2:00 1:00 D 972 Rule Detroit 1967 only - Oct lastSun 2:00 0 S 973 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 974 Zone America/Detroit -5:32:11 - LMT 1905 975 -6:00 - CST 1915 May 15 2:00 976 -5:00 - EST 1942 977 -5:00 US E%sT 1946 978 -5:00 Detroit E%sT 1973 979 -5:00 US E%sT 1975 980 -5:00 - EST 1975 Apr 27 2:00 981 -5:00 US E%sT 982 # 983 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 984 # switched from EST to CST/CDT in 1973. 985 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 986 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 987 Rule Menominee 1946 only - Sep lastSun 2:00 0 S 988 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 989 Rule Menominee 1966 only - Oct lastSun 2:00 0 S 990 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 991 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 992 -6:00 US C%sT 1946 993 -6:00 Menominee C%sT 1969 Apr 27 2:00 994 -5:00 - EST 1973 Apr 29 2:00 995 -6:00 US C%sT 996 997 # Navassa 998 # administered by the US Fish and Wildlife Service 999 # claimed by US under the provisions of the 1856 Guano Islands Act 1000 # also claimed by Haiti 1001 # occupied 1857/1900 by the Navassa Phosphate Co 1002 # US lighthouse 1917/1996-09 1003 # currently uninhabited 1004 # see Mark Fineman, "An Isle Rich in Guano and Discord", 1005 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1006 # Jimmy Skaggs, _The Great Guano Rush_ (1994). 1007 1008 ################################################################################ 1009 1010 1011 # From Paul Eggert (2006-03-22): 1012 # A good source for time zone historical data outside the U.S. is 1013 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1014 # San Diego: ACS Publications, Inc. (2003). 1015 # 1016 # Gwillim Law writes that a good source 1017 # for recent time zone data is the International Air Transport 1018 # Association's Standard Schedules Information Manual (IATA SSIM), 1019 # published semiannually. Law sent in several helpful summaries 1020 # of the IATA's data after 1990. 1021 # 1022 # Except where otherwise noted, Shanks & Pottenger is the source for 1023 # entries through 1990, and IATA SSIM is the source for entries afterwards. 1024 # 1025 # Other sources occasionally used include: 1026 # 1027 # Edward W. Whitman, World Time Differences, 1028 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1029 # which I found in the UCLA library. 1030 # 1031 # William Willett, The Waste of Daylight, 19th edition 1032 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1033 # [PDF] (1914-03) 1034 # 1035 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1036 # <http://www.jstor.org/stable/1774359>. 1037 # 1038 # See the 'europe' file for Greenland. 1039 1040 # Canada 1041 1042 # From Alain LaBonté (1994-11-14): 1043 # I post here the time zone abbreviations standardized in Canada 1044 # for both English and French in the CAN/CSA-Z234.4-89 standard.... 1045 # 1046 # UTC Standard time Daylight saving time 1047 # offset French English French English 1048 # -2:30 - - HAT NDT 1049 # -3 - - HAA ADT 1050 # -3:30 HNT NST - - 1051 # -4 HNA AST HAE EDT 1052 # -5 HNE EST HAC CDT 1053 # -6 HNC CST HAR MDT 1054 # -7 HNR MST HAP PDT 1055 # -8 HNP PST HAY YDT 1056 # -9 HNY YST - - 1057 # 1058 # HN: Heure Normale ST: Standard Time 1059 # HA: Heure Avancée DT: Daylight saving Time 1060 # 1061 # A: de l'Atlantique Atlantic 1062 # C: du Centre Central 1063 # E: de l'Est Eastern 1064 # M: Mountain 1065 # N: Newfoundland 1066 # P: du Pacifique Pacific 1067 # R: des Rocheuses 1068 # T: de Terre-Neuve 1069 # Y: du Yukon Yukon 1070 # 1071 # From Paul Eggert (1994-11-22): 1072 # Alas, this sort of thing must be handled by localization software. 1073 1074 # Unless otherwise specified, the data entries for Canada are all from Shanks 1075 # & Pottenger. 1076 1077 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1078 # 2007-03-01): 1079 # The British Columbia government announced yesterday that it will 1080 # adjust daylight savings next year to align with changes in the 1081 # U.S. and the rest of Canada.... 1082 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1083 # ... 1084 # Nova Scotia 1085 # Daylight saving time will be extended by four weeks starting in 2007.... 1086 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1087 # 1088 # [For New Brunswick] the new legislation dictates that the time change is to 1089 # be done at 02:00 instead of 00:01. 1090 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1091 # ... 1092 # Manitoba has traditionally changed the clock every fall at 03:00. 1093 # As of 2006, the transition is to take place one hour earlier at 02:00. 1094 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1095 # ... 1096 # [Alberta, Ontario, Quebec] will follow US rules. 1097 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1098 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1099 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1100 # ... 1101 # P.E.I. will follow US rules.... 1102 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1103 # ... 1104 # Province of Newfoundland and Labrador.... 1105 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1106 # ... 1107 # Yukon 1108 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1109 # ... 1110 # N.W.T. will follow US rules. Whoever maintains the government web site 1111 # does not seem to believe in bookmarks. To see the news release, click the 1112 # following link and search for "Daylight Savings Time Change". Press the 1113 # "Daylight Savings Time Change" link; it will fire off a popup using 1114 # JavaScript. 1115 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1116 # ... 1117 # Nunavut 1118 # An amendment to the Interpretation Act was registered on February 19/2007.... 1119 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1120 1121 # From Paul Eggert (2006-04-25): 1122 # H. David Matthews and Mary Vincent's map 1123 # "It's about TIME", _Canadian Geographic_ (September-October 1998) 1124 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 1125 # contains detailed boundaries for regions observing nonstandard 1126 # time and daylight saving time arrangements in Canada circa 1998. 1127 # 1128 # INMS, the Institute for National Measurement Standards in Ottawa, has 1129 # information about standard and daylight saving time zones in Canada. 1130 # http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php 1131 # (updated periodically). 1132 # Its unofficial information is often taken from Matthews and Vincent. 1133 1134 # From Paul Eggert (2006-06-27): 1135 # For now, assume all of DST-observing Canada will fall into line with the 1136 # new US DST rules, 1137 1138 # From Chris Walton (2011-12-01) 1139 # In the first of Tammy Hardwick's articles 1140 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1141 # she quotes the Friday November 1/1918 edition of the Creston Review. 1142 # The quote includes these two statements: 1143 # 'Sunday the CPR went back to the old system of time...' 1144 # '... The daylight saving scheme was dropped all over Canada at the same time,' 1145 # These statements refer to a transition from daylight time to standard time 1146 # that occurred nationally on Sunday October 27/1918. This transition was 1147 # also documented in the Saturday October 26/1918 edition of the Toronto Star. 1148 1149 # In light of that evidence, we alter the date from the earlier believed 1150 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1151 # than Thursday) in all Canadian rulesets. 1152 1153 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1154 Rule Canada 1918 only - Apr 14 2:00 1:00 D 1155 Rule Canada 1918 only - Oct 27 2:00 0 S 1156 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1157 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1158 Rule Canada 1945 only - Sep 30 2:00 0 S 1159 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1160 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1161 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1162 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1163 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1164 1165 1166 # Newfoundland and Labrador 1167 1168 # From Paul Eggert (2000-10-02): 1169 # Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1170 # but the only part of Labrador that follows the rules is the 1171 # southeast corner, including Port Hope Simpson and Mary's Harbour, 1172 # but excluding, say, Black Tickle. 1173 1174 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1175 Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1176 Rule StJohns 1917 only - Sep 17 2:00 0 S 1177 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1178 Rule StJohns 1919 only - May 5 23:00 1:00 D 1179 Rule StJohns 1919 only - Aug 12 23:00 0 S 1180 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1181 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1182 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1183 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1184 # Pottenger. 1185 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1186 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1187 # Whitman gives the following transitions: 1188 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1189 # but go with Shanks & Pottenger and assume they used Canadian rules. 1190 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1191 # Apr 30 - Sep 24; go with Shanks & Pottenger. 1192 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1193 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1194 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1195 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1196 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1197 # From Paul Eggert (2000-10-02): 1198 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1199 # at 00:01 local time. For now, assume it started in 1987. 1200 1201 # From Michael Pelley (2011-09-12): 1202 # We received today, Monday, September 12, 2011, notification that the 1203 # changes to the Newfoundland Standard Time Act have been proclaimed. 1204 # The change in the Act stipulates that the change from Daylight Savings 1205 # Time to Standard Time and from Standard Time to Daylight Savings Time 1206 # now occurs at 2:00AM. 1207 # ... 1208 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1209 # ... 1210 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1211 # Office of the Chief Information Officer 1212 # Executive Council 1213 # Government of Newfoundland & Labrador 1214 1215 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1216 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1217 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1218 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1219 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1220 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1221 # 1222 # St John's has an apostrophe, but Posix file names can't have apostrophes. 1223 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1224 Zone America/St_Johns -3:30:52 - LMT 1884 1225 -3:30:52 StJohns N%sT 1918 1226 -3:30:52 Canada N%sT 1919 1227 -3:30:52 StJohns N%sT 1935 Mar 30 1228 -3:30 StJohns N%sT 1942 May 11 1229 -3:30 Canada N%sT 1946 1230 -3:30 StJohns N%sT 2011 Nov 1231 -3:30 Canada N%sT 1232 1233 # most of east Labrador 1234 1235 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1236 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1237 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1238 -3:30:52 - NST 1918 1239 -3:30:52 Canada N%sT 1919 1240 -3:30:52 - NST 1935 Mar 30 1241 -3:30 - NST 1936 1242 -3:30 StJohns N%sT 1942 May 11 1243 -3:30 Canada N%sT 1946 1244 -3:30 StJohns N%sT 1966 Mar 15 2:00 1245 -4:00 StJohns A%sT 2011 Nov 1246 -4:00 Canada A%sT 1247 1248 1249 # west Labrador, Nova Scotia, Prince Edward I 1250 1251 # From Paul Eggert (2006-03-22): 1252 # Shanks & Pottenger write that since 1970 most of this region has been like 1253 # Halifax. Many locales did not observe peacetime DST until 1972; 1254 # Glace Bay, NS is the largest that we know of. 1255 # Shanks & Pottenger also write that Liverpool, NS was the only town 1256 # in Canada to observe DST in 1971 but not 1970; for now we'll assume 1257 # this is a typo. 1258 1259 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1260 Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1261 Rule Halifax 1916 only - Oct 1 0:00 0 S 1262 Rule Halifax 1920 only - May 9 0:00 1:00 D 1263 Rule Halifax 1920 only - Aug 29 0:00 0 S 1264 Rule Halifax 1921 only - May 6 0:00 1:00 D 1265 Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1266 Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1267 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1268 Rule Halifax 1923 only - Sep 4 0:00 0 S 1269 Rule Halifax 1924 only - Sep 15 0:00 0 S 1270 Rule Halifax 1925 only - Sep 28 0:00 0 S 1271 Rule Halifax 1926 only - May 16 0:00 1:00 D 1272 Rule Halifax 1926 only - Sep 13 0:00 0 S 1273 Rule Halifax 1927 only - May 1 0:00 1:00 D 1274 Rule Halifax 1927 only - Sep 26 0:00 0 S 1275 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1276 Rule Halifax 1928 only - Sep 9 0:00 0 S 1277 Rule Halifax 1929 only - Sep 3 0:00 0 S 1278 Rule Halifax 1930 only - Sep 15 0:00 0 S 1279 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1280 Rule Halifax 1932 only - May 1 0:00 1:00 D 1281 Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1282 Rule Halifax 1933 only - Oct 2 0:00 0 S 1283 Rule Halifax 1934 only - May 20 0:00 1:00 D 1284 Rule Halifax 1934 only - Sep 16 0:00 0 S 1285 Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1286 Rule Halifax 1935 only - Sep 30 0:00 0 S 1287 Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1288 Rule Halifax 1936 only - Sep 14 0:00 0 S 1289 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1290 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1291 Rule Halifax 1939 only - May 28 0:00 1:00 D 1292 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1293 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1294 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1295 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1296 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1297 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1298 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1299 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1300 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1301 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1302 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1303 -4:00 Halifax A%sT 1918 1304 -4:00 Canada A%sT 1919 1305 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1306 -4:00 Canada A%sT 1946 1307 -4:00 Halifax A%sT 1974 1308 -4:00 Canada A%sT 1309 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1310 -4:00 Canada A%sT 1953 1311 -4:00 Halifax A%sT 1954 1312 -4:00 - AST 1972 1313 -4:00 Halifax A%sT 1974 1314 -4:00 Canada A%sT 1315 1316 # New Brunswick 1317 1318 # From Paul Eggert (2007-01-31): 1319 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1320 # says they changed at 00:01 through 2006, and 1321 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1322 # clear that this was the case since at least 1993. 1323 # For now, assume it started in 1993. 1324 1325 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1326 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1327 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1328 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1329 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1330 Rule Moncton 1939 only - May 27 1:00 1:00 D 1331 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1332 Rule Moncton 1940 only - May 19 1:00 1:00 D 1333 Rule Moncton 1941 only - May 4 1:00 1:00 D 1334 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1335 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1336 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1337 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1338 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1339 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1340 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1341 -5:00 - EST 1902 Jun 15 1342 -4:00 Canada A%sT 1933 1343 -4:00 Moncton A%sT 1942 1344 -4:00 Canada A%sT 1946 1345 -4:00 Moncton A%sT 1973 1346 -4:00 Canada A%sT 1993 1347 -4:00 Moncton A%sT 2007 1348 -4:00 Canada A%sT 1349 1350 # Quebec 1351 1352 # From Paul Eggert (2013-08-30): 1353 # Since 1970 most of Quebec has been like Toronto. 1354 # However, because earlier versions of the tz database mistakenly relied on data 1355 # from Shanks & Pottenger saying that Quebec differed from Ontario after 1970, 1356 # a separate entry was created for most of Quebec. We're loath to lose 1357 # its pre-1970 info, even though the tz database is normally limited to 1358 # zones that differ after 1970, so keep this otherwise out-of-scope entry. 1359 1360 # Matthews and Vincent (1998) also write that Quebec east of the -63 1361 # meridian is supposed to observe AST, but residents as far east as 1362 # Natashquan use EST/EDT, and residents east of Natashquan use AST. 1363 # The Quebec department of justice writes in 1364 # "The situation in Minganie and Basse-Côte-Nord" 1365 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1366 # that the coastal strip from just east of Natashquan to Blanc-Sablon 1367 # observes Atlantic standard time all year round. 1368 # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1369 # says this common practice was codified into law as of 2007. 1370 # For lack of better info, guess this practice began around 1970, contra to 1371 # Shanks & Pottenger who have this region observing AST/ADT. 1372 1373 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1374 Rule Mont 1917 only - Mar 25 2:00 1:00 D 1375 Rule Mont 1917 only - Apr 24 0:00 0 S 1376 Rule Mont 1919 only - Mar 31 2:30 1:00 D 1377 Rule Mont 1919 only - Oct 25 2:30 0 S 1378 Rule Mont 1920 only - May 2 2:30 1:00 D 1379 Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1380 Rule Mont 1921 only - May 1 2:00 1:00 D 1381 Rule Mont 1922 only - Apr 30 2:00 1:00 D 1382 Rule Mont 1924 only - May 17 2:00 1:00 D 1383 Rule Mont 1924 1926 - Sep lastSun 2:30 0 S 1384 Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1385 Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1386 Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1387 Rule Mont 1938 1940 - Apr lastSun 0:00 1:00 D 1388 Rule Mont 1938 1939 - Sep lastSun 0:00 0 S 1389 Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1390 Rule Mont 1945 1948 - Sep lastSun 2:00 0 S 1391 Rule Mont 1949 1950 - Oct lastSun 2:00 0 S 1392 Rule Mont 1951 1956 - Sep lastSun 2:00 0 S 1393 Rule Mont 1957 1973 - Oct lastSun 2:00 0 S 1394 1395 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1396 Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1397 -4:00 Canada A%sT 1970 1398 -4:00 - AST 1399 Zone America/Montreal -4:54:16 - LMT 1884 1400 -5:00 Mont E%sT 1918 1401 -5:00 Canada E%sT 1919 1402 -5:00 Mont E%sT 1942 Feb 9 2:00s 1403 -5:00 Canada E%sT 1946 1404 -5:00 Mont E%sT 1974 1405 -5:00 Canada E%sT 1406 1407 # Ontario 1408 1409 # From Paul Eggert (2006-07-09): 1410 # Shanks & Pottenger write that since 1970 most of Ontario has been like 1411 # Toronto. 1412 # Thunder Bay skipped DST in 1973. 1413 # Many smaller locales did not observe peacetime DST until 1974; 1414 # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1415 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1416 1417 # From Mark Brader (2003-07-26): 1418 # [According to the Toronto Star] Orillia, Ontario, adopted DST 1419 # effective Saturday, 1912-06-22, 22:00; the article mentions that 1420 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1421 # have already done so. In Orillia DST was to run until Saturday, 1422 # 1912-08-31 (no time mentioned), but it was met with considerable 1423 # hostility from certain segments of the public, and was revoked after 1424 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1425 # presumably that should be -07-06. (1912-06-19, -07-12; also letters 1426 # earlier in June). 1427 # 1428 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1429 1430 # From Paul Eggert (1997-10-17): 1431 # Mark Brader writes that an article in the 1997-10-14 Toronto Star 1432 # says that Atikokan, Ontario currently does not observe DST, 1433 # but will vote on 11-10 whether to use EST/EDT. 1434 # He also writes that the Ontario Time Act (1990, Chapter T.9) 1435 # http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 1436 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1437 # Officially Atikokan is therefore on CST/CDT, and most likely this report 1438 # concerns a non-official time observed as a matter of local practice. 1439 # 1440 # From Paul Eggert (2000-10-02): 1441 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1442 # New Osnaburgh observe CST all year, that Big Trout Lake observes 1443 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1444 # violation of the official Ontario rules. 1445 # 1446 # From Paul Eggert (2006-07-09): 1447 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1448 # 2005-07-21 Chronicle-Journal, which said: 1449 # 1450 # The clocks in Atikokan stay set on standard time year-round. 1451 # This means they spend about half the time on central time and 1452 # the other half on eastern time. 1453 # 1454 # For the most part, the system works, Mayor Dennis Brown said. 1455 # 1456 # "The majority of businesses in Atikokan deal more with Eastern 1457 # Canada, but there are some that deal with Western Canada," he 1458 # said. "I don't see any changes happening here." 1459 # 1460 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1461 # [New Osnaburgh] follow the same practice." 1462 1463 # From Garry McKinnon (2006-07-14) via Chris Walton: 1464 # I chatted with a member of my board who has an outstanding memory 1465 # and a long history in Atikokan (and in the telecom industry) and he 1466 # can say for certain that Atikokan has been practicing the current 1467 # time keeping since 1952, at least. 1468 1469 # From Paul Eggert (2006-07-17): 1470 # Shanks & Pottenger say that Atikokan has agreed with Rainy River 1471 # ever since standard time was introduced, but the information from 1472 # McKinnon sounds more authoritative. For now, assume that Atikokan 1473 # switched to EST immediately after WWII era daylight saving time 1474 # ended. This matches the old (less-populous) America/Coral_Harbour 1475 # entry since our cutoff date of 1970, so we can move 1476 # America/Coral_Harbour to the 'backward' file. 1477 1478 # From Mark Brader (2010-03-06): 1479 # 1480 # Currently the database has: 1481 # 1482 # # Ontario 1483 # 1484 # # From Paul Eggert (2006-07-09): 1485 # # Shanks & Pottenger write that since 1970 most of Ontario has been like 1486 # # Toronto. 1487 # # Thunder Bay skipped DST in 1973. 1488 # # Many smaller locales did not observe peacetime DST until 1974; 1489 # # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1490 # 1491 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1492 # right corner of page 1, it says that Toronto will return to standard 1493 # time at 2 am Sunday morning (which agrees with the database), and that: 1494 # 1495 # The one-hour setback will go into effect throughout most of Ontario, 1496 # except in areas like Windsor which remains on standard time all year. 1497 # 1498 # Windsor is, of course, a lot larger than Nipigon. 1499 # 1500 # I only came across this incidentally. I don't know if Windsor began 1501 # observing DST when Detroit did, or in 1974, or on some other date. 1502 # 1503 # By the way, the article continues by noting that: 1504 # 1505 # Some cities in the United States have pushed the deadline back 1506 # three weeks and will change over from daylight saving in October. 1507 1508 # From Arthur David Olson (2010-07-17): 1509 # 1510 # "Standard Time and Time Zones in Canada" appeared in 1511 # The Journal of The Royal Astronomical Society of Canada, 1512 # volume 26, number 2 (February 1932) and, as of 2010-07-17, 1513 # was available at 1514 # http://adsabs.harvard.edu/full/1932JRASC..26...49S 1515 # 1516 # It includes the text below (starting on page 57): 1517 # 1518 # A list of the places in Canada using daylight saving time would 1519 # require yearly revision. From information kindly furnished by 1520 # the provincial governments and by the postmasters in many cities 1521 # and towns, it is found that the following places used daylight sav- 1522 # ing in 1930. The information for the province of Quebec is definite, 1523 # for the other provinces only approximate: 1524 # 1525 # Province Daylight saving time used 1526 # Prince Edward Island Not used. 1527 # Nova Scotia In Halifax only. 1528 # New Brunswick In St. John only. 1529 # Quebec In the following places: 1530 # Montreal Lachine 1531 # Quebec Mont-Royal 1532 # Lévis Iberville 1533 # St. Lambert Cap de la Madelèine 1534 # Verdun Loretteville 1535 # Westmount Richmond 1536 # Outremont St. Jérôme 1537 # Longueuil Greenfield Park 1538 # Arvida Waterloo 1539 # Chambly-Canton Beaulieu 1540 # Melbourne La Tuque 1541 # St. Théophile Buckingham 1542 # Ontario Used generally in the cities and towns along 1543 # the southerly part of the province. Not 1544 # used in the northwesterly part. 1545 # Manitoba Not used. 1546 # Saskatchewan In Regina only. 1547 # Alberta Not used. 1548 # British Columbia Not used. 1549 # 1550 # With some exceptions, the use of daylight saving may be said to be limited 1551 # to those cities and towns lying between Quebec city and Windsor, Ont. 1552 1553 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1554 Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1555 Rule Toronto 1919 only - Oct 26 0:00 0 S 1556 Rule Toronto 1920 only - May 2 2:00 1:00 D 1557 Rule Toronto 1920 only - Sep 26 0:00 0 S 1558 Rule Toronto 1921 only - May 15 2:00 1:00 D 1559 Rule Toronto 1921 only - Sep 15 2:00 0 S 1560 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1561 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1562 # was meant. 1563 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1564 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1565 # The 1927-to-1939 rules can be expressed more simply as 1566 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1567 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1568 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1569 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1570 # The rules below avoid use of Sun>=25 1571 # (which pre-2004 versions of zic cannot handle). 1572 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1573 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1574 Rule Toronto 1932 only - May 1 2:00 1:00 D 1575 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1576 Rule Toronto 1933 only - Oct 1 2:00 0 S 1577 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1578 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1579 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1580 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1581 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1582 Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1583 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1584 Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1585 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1586 # Shanks & Pottenger say Toronto ended DST a week early in 1971, 1587 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1588 # is wrong, and that he had confirmed it by checking the 1971-10-30 1589 # Toronto Star, which said that DST was ending 1971-10-31 as usual. 1590 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1591 1592 # From Paul Eggert (2003-07-27): 1593 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1594 # Port Arthur, Ontario, the principle of the Bill has been in 1595 # operation for the past three years, and in the City of Moose Jaw, 1596 # Saskatchewan, for one year." 1597 1598 # From David Bryan via Tory Tronrud, Director/Curator, 1599 # Thunder Bay Museum (2003-11-12): 1600 # There is some suggestion, however, that, by-law or not, daylight 1601 # savings time was being practiced in Fort William and Port Arthur 1602 # before 1909.... [I]n 1910, the line between the Eastern and Central 1603 # Time Zones was permanently moved about two hundred miles west to 1604 # include the Thunder Bay area.... When Canada adopted daylight 1605 # savings time in 1916, Fort William and Port Arthur, having done so 1606 # already, did not change their clocks.... During the Second World 1607 # War,... [t]he cities agreed to implement DST during the summer 1608 # months for the remainder of the war years. 1609 1610 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1611 Zone America/Toronto -5:17:32 - LMT 1895 1612 -5:00 Canada E%sT 1919 1613 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1614 -5:00 Canada E%sT 1946 1615 -5:00 Toronto E%sT 1974 1616 -5:00 Canada E%sT 1617 Zone America/Thunder_Bay -5:57:00 - LMT 1895 1618 -6:00 - CST 1910 1619 -5:00 - EST 1942 1620 -5:00 Canada E%sT 1970 1621 -5:00 Toronto E%sT 1973 1622 -5:00 - EST 1974 1623 -5:00 Canada E%sT 1624 Zone America/Nipigon -5:53:04 - LMT 1895 1625 -5:00 Canada E%sT 1940 Sep 29 1626 -5:00 1:00 EDT 1942 Feb 9 2:00s 1627 -5:00 Canada E%sT 1628 Zone America/Rainy_River -6:18:16 - LMT 1895 1629 -6:00 Canada C%sT 1940 Sep 29 1630 -6:00 1:00 CDT 1942 Feb 9 2:00s 1631 -6:00 Canada C%sT 1632 Zone America/Atikokan -6:06:28 - LMT 1895 1633 -6:00 Canada C%sT 1940 Sep 29 1634 -6:00 1:00 CDT 1942 Feb 9 2:00s 1635 -6:00 Canada C%sT 1945 Sep 30 2:00 1636 -5:00 - EST 1637 1638 1639 # Manitoba 1640 1641 # From Rob Douglas (2006-04-06): 1642 # the old Manitoba Time Act - as amended by Bill 2, assented to 1643 # March 27, 1987 ... said ... 1644 # "between two o'clock Central Standard Time in the morning of 1645 # the first Sunday of April of each year and two o'clock Central 1646 # Standard Time in the morning of the last Sunday of October next 1647 # following, one hour in advance of Central Standard Time."... 1648 # I believe that the English legislation [of the old time act] had 1649 # been assented to (March 22, 1967).... 1650 # Also, as far as I can tell, there was no order-in-council varying 1651 # the time of Daylight Saving Time for 2005 and so the provisions of 1652 # the 1987 version would apply - the changeover was at 2:00 Central 1653 # Standard Time (i.e. not until 3:00 Central Daylight Time). 1654 1655 # From Paul Eggert (2006-04-10): 1656 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1657 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1658 # it was also 02:00s in 1966. 1659 1660 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1661 Rule Winn 1916 only - Apr 23 0:00 1:00 D 1662 Rule Winn 1916 only - Sep 17 0:00 0 S 1663 Rule Winn 1918 only - Apr 14 2:00 1:00 D 1664 Rule Winn 1918 only - Oct 27 2:00 0 S 1665 Rule Winn 1937 only - May 16 2:00 1:00 D 1666 Rule Winn 1937 only - Sep 26 2:00 0 S 1667 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1668 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1669 Rule Winn 1945 only - Sep lastSun 2:00 0 S 1670 Rule Winn 1946 only - May 12 2:00 1:00 D 1671 Rule Winn 1946 only - Oct 13 2:00 0 S 1672 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1673 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1674 Rule Winn 1950 only - May 1 2:00 1:00 D 1675 Rule Winn 1950 only - Sep 30 2:00 0 S 1676 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1677 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1678 Rule Winn 1959 only - Oct lastSun 2:00 0 S 1679 Rule Winn 1960 only - Sep lastSun 2:00 0 S 1680 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1681 Rule Winn 1963 only - Sep 22 2:00 0 S 1682 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1683 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1684 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1685 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1686 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1687 -6:00 Winn C%sT 2006 1688 -6:00 Canada C%sT 1689 1690 1691 # Saskatchewan 1692 1693 # From Mark Brader (2003-07-26): 1694 # The first actual adoption of DST in Canada was at the municipal 1695 # level. As the [Toronto] Star put it (1912-06-07), "While people 1696 # elsewhere have long been talking of legislation to save daylight, 1697 # the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1698 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1699 # presumably late evening, as below), and would run until "the end of 1700 # the summer". The discrepancy between municipal time and railroad 1701 # time was noted. 1702 1703 # From Paul Eggert (2003-07-27): 1704 # Willett (1914-03) notes that DST "has been in operation ... in the 1705 # City of Moose Jaw, Saskatchewan, for one year." 1706 1707 # From Paul Eggert (2006-03-22): 1708 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1709 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1710 # Other western towns (e.g. Lloydminster) are like Edmonton. 1711 # Matthews and Vincent (1998) write that Denare Beach and Creighton 1712 # are like Winnipeg, in violation of Saskatchewan law. 1713 1714 # From W. Jones (1992-11-06): 1715 # The. . .below is based on information I got from our law library, the 1716 # provincial archives, and the provincial Community Services department. 1717 # A precise history would require digging through newspaper archives, and 1718 # since you didn't say what you wanted, I didn't bother. 1719 # 1720 # Saskatchewan is split by a time zone meridian (105W) and over the years 1721 # the boundary became pretty ragged as communities near it reevaluated 1722 # their affiliations in one direction or the other. In 1965 a provincial 1723 # referendum favoured legislating common time practices. 1724 # 1725 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1726 # Saskatchewan 1978) was proclaimed, and established that the eastern 1727 # part of Saskatchewan would use CST year round, that districts in 1728 # northwest Saskatchewan would by default follow CST but could opt to 1729 # follow Mountain Time rules (thus 1 hour difference in the winter and 1730 # zero in the summer), and that districts in southwest Saskatchewan would 1731 # by default follow MT but could opt to follow CST. 1732 # 1733 # It took a few years for the dust to settle (I know one story of a town 1734 # on one time zone having its school in another, such that a mom had to 1735 # serve her family lunch in two shifts), but presently it seems that only 1736 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1737 # rules any more; all other districts appear to have used CST year round 1738 # since sometime in the 1960s. 1739 1740 # From Chris Walton (2006-06-26): 1741 # The Saskatchewan time act which was last updated in 1996 is about 30 pages 1742 # long and rather painful to read. 1743 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1744 1745 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1746 Rule Regina 1918 only - Apr 14 2:00 1:00 D 1747 Rule Regina 1918 only - Oct 27 2:00 0 S 1748 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1749 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1750 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1751 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1752 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1753 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1754 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1755 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1756 Rule Regina 1945 only - Sep lastSun 2:00 0 S 1757 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1758 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1759 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1760 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1761 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1762 Rule Regina 1959 only - Oct lastSun 2:00 0 S 1763 # 1764 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1765 Rule Swift 1957 only - Oct lastSun 2:00 0 S 1766 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1767 Rule Swift 1959 only - Oct lastSun 2:00 0 S 1768 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1769 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1770 Zone America/Regina -6:58:36 - LMT 1905 Sep 1771 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1772 -6:00 - CST 1773 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1774 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1775 -7:00 Regina M%sT 1950 1776 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1777 -6:00 - CST 1778 1779 1780 # Alberta 1781 1782 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1783 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1784 Rule Edm 1918 only - Oct 27 2:00 0 S 1785 Rule Edm 1919 only - May 27 2:00 0 S 1786 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1787 Rule Edm 1920 only - Oct lastSun 2:00 0 S 1788 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1789 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1790 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1791 Rule Edm 1945 only - Sep lastSun 2:00 0 S 1792 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1793 Rule Edm 1947 only - Sep lastSun 2:00 0 S 1794 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1795 Rule Edm 1967 only - Oct lastSun 2:00 0 S 1796 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1797 Rule Edm 1969 only - Oct lastSun 2:00 0 S 1798 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1799 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1800 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1801 Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1802 -7:00 Edm M%sT 1987 1803 -7:00 Canada M%sT 1804 1805 1806 # British Columbia 1807 1808 # From Paul Eggert (2006-03-22): 1809 # Shanks & Pottenger write that since 1970 most of this region has 1810 # been like Vancouver. 1811 # Dawson Creek uses MST. Much of east BC is like Edmonton. 1812 # Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1813 1814 # It seems though that (re: Creston) is not entirely correct: 1815 1816 # From Chris Walton (2011-12-01): 1817 # There are two areas within the Canadian province of British Columbia 1818 # that do not currently observe daylight saving: 1819 # a) The Creston Valley (includes the town of Creston and surrounding area) 1820 # b) The eastern half of the Peace River Regional District 1821 # (includes the cities of Dawson Creek and Fort St. John) 1822 1823 # Earlier this year I stumbled across a detailed article about the time 1824 # keeping history of Creston; it was written by Tammy Hardwick who is the 1825 # manager of the Creston & District Museum. The article was written in May 2009. 1826 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1827 # According to the article, Creston has not changed its clocks since June 1918. 1828 # i.e. Creston has been stuck on UTC-7 for 93 years. 1829 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1830 1831 # Unfortunately the exact date for the time change in June 1918 remains 1832 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1833 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1834 # as plausible as any other date (in June). She also said that after writing 1835 # the article she had discovered another time change in 1916; this is the 1836 # subject of another article which she wrote in October 2010. 1837 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1838 1839 # Here is a summary of the three clock change events in Creston's history: 1840 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1841 # Exact date unknown 1842 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1843 # Exact date in October unknown; Sunday October 1 is a reasonable guess. 1844 # 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1845 # Exact date in June unknown; Sunday June 2 is a reasonable guess. 1846 # note#1: 1847 # On Oct 27/1918 when daylight saving ended in the rest of Canada, 1848 # Creston did not change its clocks. 1849 # note#2: 1850 # During WWII when the Federal Government legislated a mandatory clock change, 1851 # Creston did not oblige. 1852 # note#3: 1853 # There is no guarantee that Creston will remain on Mountain Standard Time 1854 # (UTC-7) forever. 1855 # The subject was debated at least once this year by the town Council. 1856 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1857 1858 # During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1859 # In Creston, that was handled by shifting the area to PST (-8:00) then applying 1860 # summer time to cause the offset to be -7:00, the same as it had been before 1861 # the change. It can be argued that the timezone abbreviation during this 1862 # period should be PDT rather than MST, but that doesn't seem important enough 1863 # (to anyone) to further complicate the rules. 1864 1865 # The transition dates (and times) are guesses. 1866 1867 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1868 Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1869 Rule Vanc 1918 only - Oct 27 2:00 0 S 1870 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1871 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1872 Rule Vanc 1945 only - Sep 30 2:00 0 S 1873 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1874 Rule Vanc 1946 only - Oct 13 2:00 0 S 1875 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1876 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1877 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1878 Zone America/Vancouver -8:12:28 - LMT 1884 1879 -8:00 Vanc P%sT 1987 1880 -8:00 Canada P%sT 1881 Zone America/Dawson_Creek -8:00:56 - LMT 1884 1882 -8:00 Canada P%sT 1947 1883 -8:00 Vanc P%sT 1972 Aug 30 2:00 1884 -7:00 - MST 1885 Zone America/Creston -7:46:04 - LMT 1884 1886 -7:00 - MST 1916 Oct 1 1887 -8:00 - PST 1918 Jun 2 1888 -7:00 - MST 1889 1890 # Northwest Territories, Nunavut, Yukon 1891 1892 # From Paul Eggert (2006-03-22): 1893 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1894 # Mathew Englander (1996-10-07) gives the following refs: 1895 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1896 # c. 7 defines Yukon standard time as UTC-9. This is still valid; 1897 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1898 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1899 # * O.I.C. 1980/02 established DST. 1900 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1901 # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1902 # with Englander. 1903 # From Chris Walton (2006-06-26): 1904 # Here is a link to the old daylight saving portion of the interpretation 1905 # act which was last updated in 1987: 1906 # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 1907 1908 # From Rives McDow (1999-09-04): 1909 # Nunavut ... moved ... to incorporate the whole territory into one time zone. 1910 # Nunavut moves to single time zone Oct. 31 1911 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html 1912 # 1913 # From Antoine Leca (1999-09-06): 1914 # We then need to create a new timezone for the Kitikmeot region of Nunavut 1915 # to differentiate it from the Yellowknife region. 1916 1917 # From Paul Eggert (1999-09-20): 1918 # Basic Facts: The New Territory 1919 # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 1920 # (1999) reports that Pangnirtung operates on eastern time, 1921 # and that Coral Harbour does not observe DST. We don't know when 1922 # Pangnirtung switched to eastern time; we'll guess 1995. 1923 1924 # From Rives McDow (1999-11-08): 1925 # On October 31, when the rest of Nunavut went to Central time, 1926 # Pangnirtung wobbled. Here is the result of their wobble: 1927 # 1928 # The following businesses and organizations in Pangnirtung use Central Time: 1929 # 1930 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 1931 # Eastern Arctic National Parks, A & D Specialist 1932 # 1933 # The following businesses and organizations in Pangnirtung use Eastern Time: 1934 # 1935 # Hamlet office, All other businesses, Both schools, Airport operator 1936 # 1937 # This has made for an interesting situation there, which warranted the news. 1938 # No one there that I spoke with seems concerned, or has plans to 1939 # change the local methods of keeping time, as it evidently does not 1940 # really interfere with any activities or make things difficult locally. 1941 # They plan to celebrate New Year's turn-over twice, one hour apart, 1942 # so it appears that the situation will last at least that long. 1943 # The Nunavut Intergovernmental Affairs hopes that they will "come to 1944 # their senses", but the locals evidently don't see any problem with 1945 # the current state of affairs. 1946 1947 # From Michaela Rodrigue, writing in the 1948 # Nunatsiaq News (1999-11-19): 1949 # http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html 1950 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 1951 # central - or Nunavut time - for government offices, and eastern time 1952 # for municipal offices and schools.... Igloolik [was similar but then] 1953 # made the switch to central time on Saturday, Nov. 6. 1954 1955 # From Paul Eggert (2000-10-02): 1956 # Matthews and Vincent (1998) say the following, but we lack histories 1957 # for these potential new Zones. 1958 # 1959 # The Canadian Forces station at Alert uses Eastern Time while the 1960 # handful of residents at the Eureka weather station [in the Central 1961 # zone] skip daylight savings. Baffin Island, which is crossed by the 1962 # Central, Eastern and Atlantic Time zones only uses Eastern Time. 1963 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 1964 # Central Time and Southampton Island [in the Central zone] is not 1965 # required to use daylight savings. 1966 1967 # From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 1968 # Nunavut now has two time zones (2000-11-10): 1969 # The Nunavut government would allow its employees in Kugluktuk and 1970 # Cambridge Bay to operate on central time year-round, putting them 1971 # one hour behind the rest of Nunavut for six months during the winter. 1972 # At the end of October the two communities had rebelled against 1973 # Nunavut's unified time zone, refusing to shift to eastern time with 1974 # the rest of the territory for the winter. Cambridge Bay remained on 1975 # central time, while Kugluktuk, even farther west, reverted to 1976 # mountain time, which they had used before the advent of Nunavut's 1977 # unified time zone in 1999. 1978 # 1979 # From Rives McDow (2001-01-20), quoting the Nunavut government: 1980 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 1981 1982 # From Paul Eggert (2000-12-04): 1983 # Let's just keep track of the official times for now. 1984 1985 # From Rives McDow (2001-03-07): 1986 # The premier of Nunavut has issued a ministerial statement advising 1987 # that effective 2001-04-01, the territory of Nunavut will revert 1988 # back to three time zones (mountain, central, and eastern). Of the 1989 # cities in Nunavut, Coral Harbor is the only one that I know of that 1990 # has said it will not observe dst, staying on EST year round. I'm 1991 # checking for more info, and will get back to you if I come up with 1992 # more. 1993 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 1994 1995 # From Gwillim Law (2005-05-21): 1996 # According to maps at 1997 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 1998 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 1999 # (both dated 2003), and 2000 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2001 # (from a 1998 Canadian Geographic article), the de facto and de jure time 2002 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2003 # round. Using Google, it's easy to find other websites that confirm this. 2004 # I wasn't able to find how far back this time regimen goes, but since it 2005 # predates the creation of Nunavut, it probably goes back many years.... 2006 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2007 # 2008 # From Paul Eggert (2005-07-26): 2009 # For lack of better information, assume that Southampton Island observed 2010 # daylight saving only during wartime. 2011 2012 # From Chris Walton (2007-03-01): 2013 # ... the community of Resolute (located on Cornwallis Island in 2014 # Nunavut) moved from Central Time to Eastern Time last November. 2015 # Basically the community did not change its clocks at the end of 2016 # daylight saving.... 2017 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2018 2019 # From Chris Walton (2011-03-21): 2020 # Back in 2007 I initiated the creation of a new "zone file" for Resolute 2021 # Bay. Resolute Bay is a small community located about 900km north of 2022 # the Arctic Circle. The zone file was required because Resolute Bay had 2023 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2024 # 2025 # According to new information which I received last week, Resolute Bay 2026 # went back to using UTC-6 in the winter of 2007-2008... 2027 # 2028 # On March 11/2007 most of Canada went onto daylight saving. On March 2029 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2030 # talked to somebody that was both knowledgeable and helpful. I was able 2031 # to confirm that Resolute Bay was still operating on UTC-5. It was 2032 # explained to me that Resolute Bay had been on the Eastern Time zone 2033 # (EST) in the winter, and was now back on the Central Time zone (CDT). 2034 # i.e. the time zone had changed twice in the last year but the clocks 2035 # had not moved. The residents had to know which time zone they were in 2036 # so they could follow the correct TV schedule... 2037 # 2038 # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2039 # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2040 # of the phone call, I decided to seek out an alternate source of 2041 # information. I found an e-mail address for somebody by the name of 2042 # Stephanie Adams whose job was listed as "Inns North Support Officer for 2043 # Arctic Co-operatives." I was under the impression that Stephanie lived 2044 # and worked in Resolute Bay... 2045 # 2046 # On March 14/2011 I phoned the hamlet office again. I was told that 2047 # Resolute Bay had been using Central Standard Time over the winter of 2048 # 2010-2011 and that the clocks had therefore been moved one hour ahead 2049 # on March 13/2011. The person I talked to was aware that Resolute Bay 2050 # had previously experimented with Eastern Standard Time but he could not 2051 # tell me when the practice had stopped. 2052 # 2053 # On March 17/2011 I searched the Web to find an e-mail address of 2054 # somebody that might be able to tell me exactly when Resolute Bay went 2055 # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2056 # used to be the mayor of Resolute Bay and he apparently owns half the 2057 # businesses including "South Camp Inn." This website has some info on 2058 # Aziz: 2059 # http://www.uphere.ca/node/493 2060 # 2061 # I sent Aziz an e-mail asking when Resolute Bay had stopped using 2062 # Eastern Standard Time. 2063 # 2064 # Aziz responded quickly with this: "hi, The time was not changed for the 2065 # 1 year only, the following year, the community went back to the old way 2066 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2067 # the winter Zulu plus 6 hrs" 2068 # 2069 # This of course conflicted with everything I had ascertained in November 2008. 2070 # 2071 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2072 # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2073 # may want to check with the weather office in Resolute Bay or do a 2074 # search on the weather through Env. Canada. web site" 2075 # 2076 # If I had realized the Stephanie did not live in Resolute Bay I would 2077 # never have contacted her. I now believe that all the information I 2078 # obtained in November 2008 should be ignored... 2079 # I apologize for reporting incorrect information in 2008. 2080 2081 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2082 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2083 Rule NT_YK 1918 only - Oct 27 2:00 0 S 2084 Rule NT_YK 1919 only - May 25 2:00 1:00 D 2085 Rule NT_YK 1919 only - Nov 1 0:00 0 S 2086 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2087 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2088 Rule NT_YK 1945 only - Sep 30 2:00 0 S 2089 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2090 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2091 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2092 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2093 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2094 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2095 # aka Panniqtuuq 2096 Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 2097 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2098 -5:00 Canada E%sT 1999 Oct 31 2:00 2099 -6:00 Canada C%sT 2000 Oct 29 2:00 2100 -5:00 Canada E%sT 2101 # formerly Frobisher Bay 2102 Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 2103 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2104 -6:00 Canada C%sT 2000 Oct 29 2:00 2105 -5:00 Canada E%sT 2106 # aka Qausuittuq 2107 Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 2108 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2109 -5:00 - EST 2001 Apr 1 3:00 2110 -6:00 Canada C%sT 2006 Oct 29 2:00 2111 -5:00 - EST 2007 Mar 11 3:00 2112 -6:00 Canada C%sT 2113 # aka Kangiqiniq 2114 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2115 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2116 -5:00 - EST 2001 Apr 1 3:00 2117 -6:00 Canada C%sT 2118 # aka Iqaluktuuttiaq 2119 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 2120 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2121 -6:00 Canada C%sT 2000 Oct 29 2:00 2122 -5:00 - EST 2000 Nov 5 0:00 2123 -6:00 - CST 2001 Apr 1 3:00 2124 -7:00 Canada M%sT 2125 Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2126 -7:00 NT_YK M%sT 1980 2127 -7:00 Canada M%sT 2128 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 2129 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2130 -7:00 NT_YK M%sT 1980 2131 -7:00 Canada M%sT 2132 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2133 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 2134 -8:00 NT_YK P%sT 1980 2135 -8:00 Canada P%sT 2136 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2137 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2138 -8:00 NT_YK P%sT 1980 2139 -8:00 Canada P%sT 2140 2141 2142 ############################################################################### 2143 2144 # Mexico 2145 2146 # From Paul Eggert (2001-03-05): 2147 # The Investigation and Analysis Service of the 2148 # Mexican Library of Congress (MLoC) has published a 2149 # history of Mexican local time (in Spanish) 2150 # http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/ 2151 # 2152 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2153 # (In all cases we go with the MLoC.) 2154 # S&P report that Baja was at -8:00 in 1922/1923. 2155 # S&P say the 1930 transition in Baja was 1930-11-16. 2156 # S&P report no DST during summer 1931. 2157 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2158 2159 # From Gwillim Law (2001-02-20): 2160 # There are some other discrepancies between the Decrees page and the 2161 # tz database. I think they can best be explained by supposing that 2162 # the researchers who prepared the Decrees page failed to find some of 2163 # the relevant documents. 2164 2165 # From Alan Perry (1996-02-15): 2166 # A guy from our Mexico subsidiary finally found the Presidential Decree 2167 # outlining the timezone changes in Mexico. 2168 # 2169 # ------------- Begin Forwarded Message ------------- 2170 # 2171 # I finally got my hands on the Official Presidential Decree that sets up the 2172 # rules for the DST changes. The rules are: 2173 # 2174 # 1. The country is divided in 3 timezones: 2175 # - Baja California Norte (the Mexico/BajaNorte TZ) 2176 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2177 # - The rest of the country (the Mexico/General TZ) 2178 # 2179 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2180 # at 2:00 AM, the times in each zone are as follows: 2181 # BajaNorte: GMT+7 2182 # BajaSur: GMT+6 2183 # General: GMT+5 2184 # 2185 # 3. The rest of the year, the times are as follows: 2186 # BajaNorte: GMT+8 2187 # BajaSur: GMT+7 2188 # General: GMT+6 2189 # 2190 # The Decree was published in Mexico's Official Newspaper on January 4th. 2191 # 2192 # -------------- End Forwarded Message -------------- 2193 # From Paul Eggert (1996-06-12): 2194 # For an English translation of the decree, see 2195 # "Diario Oficial: Time Zone Changeover" (1996-01-04). 2196 # http://mexico-travel.com/extra/timezone_eng.html 2197 2198 # From Rives McDow (1998-10-08): 2199 # The State of Quintana Roo has reverted back to central STD and DST times 2200 # (i.e. UTC -0600 and -0500 as of 1998-08-02). 2201 2202 # From Rives McDow (2000-01-10): 2203 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2204 # zone 5 hours from the International Date Line, and will not observe daylight 2205 # savings time so as to stay on the same time zone as the southern part of 2206 # Arizona year round. 2207 2208 # From Jesper Nørgaard, translating 2209 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2210 # In Oaxaca, the 55.000 teachers from the Section 22 of the National 2211 # Syndicate of Education Workers, refuse to apply daylight saving each 2212 # year, so that the more than 10,000 schools work at normal hour the 2213 # whole year. 2214 2215 # From Gwillim Law (2001-01-19): 2216 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2217 # (translated):... 2218 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2219 # that Summer Time will be reduced from seven to five months, starting 2220 # this year.... 2221 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 2222 # [translated], says "summer time will ... take effect on the first Sunday 2223 # in May, and end on the last Sunday of September. 2224 2225 # From Arthur David Olson (2001-01-25): 2226 # The 2001-01-24 traditional Washington Post contained the page one 2227 # story "Timely Issue Divides Mexicans."... 2228 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2229 # ... Mexico City Mayor López Obrador "...is threatening to keep 2230 # Mexico City and its 20 million residents on a different time than 2231 # the rest of the country..." In particular, López Obrador would abolish 2232 # observation of Daylight Saving Time. 2233 2234 # Official statute published by the Energy Department 2235 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2236 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2237 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). 2238 2239 # From Paul Eggert (2001-03-03): 2240 # 2241 # http://www.latimes.com/news/nation/20010303/t000018766.html 2242 # James F. Smith writes in today's LA Times 2243 # * Sonora will continue to observe standard time. 2244 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that 2245 # the Federal District will not adopt DST. 2246 # * 4 of 16 district leaders announced they'll ignore the decree. 2247 # * The decree does not affect federal-controlled facilities including 2248 # the airport, banks, hospitals, and schools. 2249 # 2250 # For now we'll assume that the Federal District will bow to federal rules. 2251 2252 # From Jesper Nørgaard (2001-04-01): 2253 # I found some references to the Mexican application of daylight 2254 # saving, which modifies what I had already sent you, stating earlier 2255 # that a number of northern Mexican states would go on daylight 2256 # saving. The modification reverts this to only cover Baja California 2257 # (Norte), while all other states (except Sonora, who has no daylight 2258 # saving all year) will follow the original decree of president 2259 # Vicente Fox, starting daylight saving May 6, 2001 and ending 2260 # September 30, 2001. 2261 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 2262 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2263 2264 # From Reuters (2001-09-04): 2265 # Mexico's Supreme Court on Tuesday declared that daylight savings was 2266 # unconstitutional in Mexico City, creating the possibility the 2267 # capital will be in a different time zone from the rest of the nation 2268 # next year.... The Supreme Court's ruling takes effect at 2:00 2269 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2270 # standard time. "This is so residents of the Federal District are not 2271 # subject to unexpected time changes," a statement from the court said. 2272 2273 # From Jesper Nørgaard Welen (2002-03-12): 2274 # ... consulting my local grocery store(!) and my coworkers, they all insisted 2275 # that a new decision had been made to reinstate US style DST in Mexico.... 2276 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2277 # confirms this. Sonora as usual is the only state where DST is not applied. 2278 2279 # From Steffen Thorsen (2009-12-28): 2280 # 2281 # Steffen Thorsen wrote: 2282 # > Mexico's House of Representatives has approved a proposal for northern 2283 # > Mexico's border cities to share the same daylight saving schedule as 2284 # > the United States. 2285 # Now this has passed both the Congress and the Senate, so starting from 2286 # 2010, some border regions will be the same: 2287 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2288 # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2289 # (Spanish) 2290 # 2291 # Could not find the new law text, but the proposed law text changes are here: 2292 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2293 # (Gaceta Parlamentaria) 2294 # 2295 # There is also a list of the votes here: 2296 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2297 # 2298 # Our page: 2299 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2300 2301 # From Arthur David Olson (2010-01-20): 2302 # The page 2303 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2304 # includes this text: 2305 # En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2306 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2307 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2308 # Tamaulipas, la aplicación de este horario estacional surtirá efecto 2309 # desde las dos horas del segundo domingo de marzo y concluirá a las dos 2310 # horas del primer domingo de noviembre. 2311 # En los municipios fronterizos que se encuentren ubicados en la franja 2312 # fronteriza norte en el territorio comprendido entre la línea 2313 # internacional y la línea paralela ubicada a una distancia de veinte 2314 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2315 # interior del país, la aplicación de este horario estacional surtirá 2316 # efecto desde las dos horas del segundo domingo de marzo y concluirá a 2317 # las dos horas del primer domingo de noviembre. 2318 2319 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2320 Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2321 Rule Mexico 1939 only - Jun 25 0:00 0 S 2322 Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2323 Rule Mexico 1941 only - Apr 1 0:00 0 S 2324 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2325 Rule Mexico 1944 only - May 1 0:00 0 S 2326 Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2327 Rule Mexico 1950 only - Jul 30 0:00 0 S 2328 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2329 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2330 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2331 Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2332 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2333 Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2334 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2335 # Quintana Roo; represented by Cancún 2336 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2337 -6:00 - CST 1981 Dec 23 2338 -5:00 Mexico E%sT 1998 Aug 2 2:00 2339 -6:00 Mexico C%sT 2340 # Campeche, Yucatán; represented by Mérida 2341 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2342 -6:00 - CST 1981 Dec 23 2343 -5:00 - EST 1982 Dec 2 2344 -6:00 Mexico C%sT 2345 # Coahuila, Durango, Nuevo León, Tamaulipas (near US border) 2346 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2347 -6:00 - CST 1988 2348 -6:00 US C%sT 1989 2349 -6:00 Mexico C%sT 2010 2350 -6:00 US C%sT 2351 # Coahuila, Durango, Nuevo León, Tamaulipas (away from US border) 2352 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2353 -6:00 - CST 1988 2354 -6:00 US C%sT 1989 2355 -6:00 Mexico C%sT 2356 # Central Mexico 2357 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2358 -7:00 - MST 1927 Jun 10 23:00 2359 -6:00 - CST 1930 Nov 15 2360 -7:00 - MST 1931 May 1 23:00 2361 -6:00 - CST 1931 Oct 2362 -7:00 - MST 1932 Apr 1 2363 -6:00 Mexico C%sT 2001 Sep 30 2:00 2364 -6:00 - CST 2002 Feb 20 2365 -6:00 Mexico C%sT 2366 # Chihuahua (near US border) 2367 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2368 -7:00 - MST 1927 Jun 10 23:00 2369 -6:00 - CST 1930 Nov 15 2370 -7:00 - MST 1931 May 1 23:00 2371 -6:00 - CST 1931 Oct 2372 -7:00 - MST 1932 Apr 1 2373 -6:00 - CST 1996 2374 -6:00 Mexico C%sT 1998 2375 -6:00 - CST 1998 Apr Sun>=1 3:00 2376 -7:00 Mexico M%sT 2010 2377 -7:00 US M%sT 2378 # Chihuahua (away from US border) 2379 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2380 -7:00 - MST 1927 Jun 10 23:00 2381 -6:00 - CST 1930 Nov 15 2382 -7:00 - MST 1931 May 1 23:00 2383 -6:00 - CST 1931 Oct 2384 -7:00 - MST 1932 Apr 1 2385 -6:00 - CST 1996 2386 -6:00 Mexico C%sT 1998 2387 -6:00 - CST 1998 Apr Sun>=1 3:00 2388 -7:00 Mexico M%sT 2389 # Sonora 2390 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2391 -7:00 - MST 1927 Jun 10 23:00 2392 -6:00 - CST 1930 Nov 15 2393 -7:00 - MST 1931 May 1 23:00 2394 -6:00 - CST 1931 Oct 2395 -7:00 - MST 1932 Apr 1 2396 -6:00 - CST 1942 Apr 24 2397 -7:00 - MST 1949 Jan 14 2398 -8:00 - PST 1970 2399 -7:00 Mexico M%sT 1999 2400 -7:00 - MST 2401 2402 # From Alexander Krivenyshev (2010-04-21): 2403 # According to news, Bahía de Banderas (Mexican state of Nayarit) 2404 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2405 # share the same time zone as nearby city Puerto Vallarta, Jalisco). 2406 # 2407 # (Spanish) 2408 # Bahía de Banderas homologa su horario al del centro del 2409 # país, a partir de este domingo 2410 # http://www.nayarit.gob.mx/notes.asp?id=20748 2411 # 2412 # Bahía de Banderas homologa su horario con el del Centro del 2413 # País 2414 # http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50 2415 # 2416 # (English) 2417 # Puerto Vallarta and Bahía de Banderas: One Time Zone 2418 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2419 # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2420 # 2421 # "Mexico's Senate approved the amendments to the Mexican Schedule System that 2422 # will allow Bahía de Banderas and Puerto Vallarta to share the same time 2423 # zone ..." 2424 # Baja California Sur, Nayarit, Sinaloa 2425 2426 # From Arthur David Olson (2010-05-01): 2427 # Use "Bahia_Banderas" to keep the name to fourteen characters. 2428 2429 # Mazatlán 2430 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2431 -7:00 - MST 1927 Jun 10 23:00 2432 -6:00 - CST 1930 Nov 15 2433 -7:00 - MST 1931 May 1 23:00 2434 -6:00 - CST 1931 Oct 2435 -7:00 - MST 1932 Apr 1 2436 -6:00 - CST 1942 Apr 24 2437 -7:00 - MST 1949 Jan 14 2438 -8:00 - PST 1970 2439 -7:00 Mexico M%sT 2440 2441 # Bahía de Banderas 2442 Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2443 -7:00 - MST 1927 Jun 10 23:00 2444 -6:00 - CST 1930 Nov 15 2445 -7:00 - MST 1931 May 1 23:00 2446 -6:00 - CST 1931 Oct 2447 -7:00 - MST 1932 Apr 1 2448 -6:00 - CST 1942 Apr 24 2449 -7:00 - MST 1949 Jan 14 2450 -8:00 - PST 1970 2451 -7:00 Mexico M%sT 2010 Apr 4 2:00 2452 -6:00 Mexico C%sT 2453 2454 # Baja California (near US border) 2455 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2456 -7:00 - MST 1924 2457 -8:00 - PST 1927 Jun 10 23:00 2458 -7:00 - MST 1930 Nov 15 2459 -8:00 - PST 1931 Apr 1 2460 -8:00 1:00 PDT 1931 Sep 30 2461 -8:00 - PST 1942 Apr 24 2462 -8:00 1:00 PWT 1945 Aug 14 23:00u 2463 -8:00 1:00 PPT 1945 Nov 12 # Peace 2464 -8:00 - PST 1948 Apr 5 2465 -8:00 1:00 PDT 1949 Jan 14 2466 -8:00 - PST 1954 2467 -8:00 CA P%sT 1961 2468 -8:00 - PST 1976 2469 -8:00 US P%sT 1996 2470 -8:00 Mexico P%sT 2001 2471 -8:00 US P%sT 2002 Feb 20 2472 -8:00 Mexico P%sT 2010 2473 -8:00 US P%sT 2474 # Baja California (away from US border) 2475 Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2476 -7:00 - MST 1924 2477 -8:00 - PST 1927 Jun 10 23:00 2478 -7:00 - MST 1930 Nov 15 2479 -8:00 - PST 1931 Apr 1 2480 -8:00 1:00 PDT 1931 Sep 30 2481 -8:00 - PST 1942 Apr 24 2482 -8:00 1:00 PWT 1945 Aug 14 23:00u 2483 -8:00 1:00 PPT 1945 Nov 12 # Peace 2484 -8:00 - PST 1948 Apr 5 2485 -8:00 1:00 PDT 1949 Jan 14 2486 -8:00 - PST 1954 2487 -8:00 CA P%sT 1961 2488 -8:00 - PST 1976 2489 -8:00 US P%sT 1996 2490 -8:00 Mexico P%sT 2001 2491 -8:00 US P%sT 2002 Feb 20 2492 -8:00 Mexico P%sT 2493 # From Paul Eggert (2006-03-22): 2494 # Formerly there was an America/Ensenada zone, which differed from 2495 # America/Tijuana only in that it did not observe DST from 1976 2496 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2497 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2498 # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2499 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2500 # DST-observance was a town-by-town matter back then. This concerns 2501 # data after 1970 so most likely there should be at least one Zone 2502 # other than America/Tijuana for Baja, but it's not clear yet what its 2503 # name or contents should be. 2504 # 2505 # Revillagigedo Is 2506 # no information 2507 2508 ############################################################################### 2509 2510 # Anguilla 2511 # See America/Port_of_Spain. 2512 2513 # Antigua and Barbuda 2514 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2515 Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 2516 -5:00 - EST 1951 2517 -4:00 - AST 2518 2519 # Bahamas 2520 # 2521 # For 1899 Milne gives -5:09:29.5; round that. 2522 # 2523 # From Sue Williams (2006-12-07): 2524 # The Bahamas announced about a month ago that they plan to change their DST 2525 # rules to sync with the U.S. starting in 2007.... 2526 # http://www.jonesbahamas.com/?c=45&a=10412 2527 2528 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2529 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2530 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2531 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2532 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 2533 -5:00 Bahamas E%sT 1976 2534 -5:00 US E%sT 2535 2536 # Barbados 2537 2538 # For 1899 Milne gives -3:58:29.2; round that. 2539 2540 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2541 Rule Barb 1977 only - Jun 12 2:00 1:00 D 2542 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2543 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2544 Rule Barb 1979 only - Sep 30 2:00 0 S 2545 Rule Barb 1980 only - Sep 25 2:00 0 S 2546 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2547 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2548 -3:58:29 - BMT 1932 # Bridgetown Mean Time 2549 -4:00 Barb A%sT 2550 2551 # Belize 2552 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2553 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2554 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2555 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2556 Rule Belize 1973 only - Dec 5 0:00 1:00 D 2557 Rule Belize 1974 only - Feb 9 0:00 0 S 2558 Rule Belize 1982 only - Dec 18 0:00 1:00 D 2559 Rule Belize 1983 only - Feb 12 0:00 0 S 2560 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2561 Zone America/Belize -5:52:48 - LMT 1912 Apr 2562 -6:00 Belize C%sT 2563 2564 # Bermuda 2565 2566 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2567 # Bermuda dockyard, Ireland I; round that. 2568 2569 # From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2570 2571 # Next year, however, clocks in the US will go forward on the second Sunday 2572 # in March, until the first Sunday in November. And, after the Time Zone 2573 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2574 # Friday, the same thing will happen in Bermuda. 2575 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2576 2577 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2578 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2579 -4:00 - AST 1974 Apr 28 2:00 2580 -4:00 Canada A%sT 1976 2581 -4:00 US A%sT 2582 2583 # Cayman Is 2584 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2585 Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2586 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 2587 -5:00 - EST 2588 2589 # Costa Rica 2590 2591 # Milne gives -5:36:13.3 as San José mean time; round to nearest. 2592 2593 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2594 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2595 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2596 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2597 # IATA SSIM (1991-09) says the following was at 1:00; 2598 # go with Shanks & Pottenger. 2599 Rule CR 1991 only - Jul 1 0:00 0 S 2600 Rule CR 1992 only - Mar 15 0:00 0 S 2601 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'. 2602 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2603 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José 2604 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time 2605 -6:00 CR C%sT 2606 # Coco 2607 # no information; probably like America/Costa_Rica 2608 2609 # Cuba 2610 2611 # From Paul Eggert (2013-02-21): 2612 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2613 # for the port, and -5:30 for meteorological observations. 2614 # For now, stick with Shanks & Pottenger. 2615 2616 # From Arthur David Olson (1999-03-29): 2617 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2618 # the Cuban National Team and the Baltimore Orioles was carried live on 2619 # the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2620 # During the game, play-by-play announcer Jim Hunter noted that 2621 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2622 # Time today." (The "two hour" remark referred to losing one hour of 2623 # sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2624 # to DST - and one more hour on 1999-04-04 - when the announcers will have 2625 # returned to Baltimore, which switches on that date.) 2626 2627 # From Steffen Thorsen (2013-11-11): 2628 # DST start in Cuba in 2004 ... does not follow the same rules as the 2629 # years before. The correct date should be Sunday 2004-03-28 00:00 ... 2630 # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2631 2632 # From Evert van der Veer via Steffen Thorsen (2004-10-28): 2633 # Cuba is not going back to standard time this year. 2634 # From Paul Eggert (2006-03-22): 2635 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2636 # says that it's due to a problem at the Antonio Guiteras 2637 # thermoelectric plant, and says "This October there will be no return 2638 # to normal hours (after daylight saving time)". 2639 # For now, let's assume that it's a temporary measure. 2640 2641 # From Carlos A. Carnero Delgado (2005-11-12): 2642 # This year (just like in 2004-2005) there's no change in time zone 2643 # adjustment in Cuba. We will stay in daylight saving time: 2644 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2645 2646 # From Jesper Nørgaard Welen (2006-10-21): 2647 # An article in GRANMA INTERNACIONAL claims that Cuba will end 2648 # the 3 years of permanent DST next weekend, see 2649 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2650 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2651 # watches should be set back one hour - going back to 00:00 hours - returning 2652 # to the normal schedule.... 2653 2654 # From Paul Eggert (2007-03-02): 2655 # <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2656 # says Cuban clocks will advance at midnight on March 10. 2657 # For lack of better information, assume Cuba will use US rules, 2658 # except that it switches at midnight standard time as usual. 2659 # 2660 # From Steffen Thorsen (2007-10-25): 2661 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2662 # earlier - on the last Sunday of October, just like in 2006. 2663 # 2664 # He supplied these references: 2665 # 2666 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2667 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2668 # 2669 # From Alex Krivenyshev (2007-10-25): 2670 # Here is also article from Granma (Cuba): 2671 # 2672 # Regirá el Horario Normal desde el próximo domingo 28 de octubre 2673 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2674 # 2675 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2676 2677 # From Arthur David Olson (2008-03-09): 2678 # I'm in Maryland which is now observing United States Eastern Daylight 2679 # Time. At 9:44 local time I used RealPlayer to listen to 2680 # http://media.enet.cu/radioreloj 2681 # a Cuban information station, and heard 2682 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2683 # indicating that Cuba is still on standard time. 2684 2685 # From Steffen Thorsen (2008-03-12): 2686 # It seems that Cuba will start DST on Sunday, 2007-03-16... 2687 # It was announced yesterday, according to this source (in Spanish): 2688 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2689 # 2690 # Some more background information is posted here: 2691 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2692 # 2693 # The article also says that Cuba has been observing DST since 1963, 2694 # while Shanks (and tzdata) has 1965 as the first date (except in the 2695 # 1940's). Many other web pages in Cuba also claim that it has been 2696 # observed since 1963, but with the exception of 1970 - an exception 2697 # which is not present in tzdata/Shanks. So there is a chance we need to 2698 # change some historic records as well. 2699 # 2700 # One example: 2701 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2702 2703 # From Jesper Nørgaard Welen (2008-03-13): 2704 # The Cuban time change has just been confirmed on the most authoritative 2705 # web site, the Granma. Please check out 2706 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2707 # 2708 # Basically as expected after Steffen Thorsen's information, the change 2709 # will take place midnight between Saturday and Sunday. 2710 2711 # From Arthur David Olson (2008-03-12): 2712 # Assume Sun>=15 (third Sunday) going forward. 2713 2714 # From Alexander Krivenyshev (2009-03-04) 2715 # According to the Radio Reloj - Cuba will start Daylight Saving Time on 2716 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2717 # not on midnight March 14 / March 15 as previously thought. 2718 # 2719 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2720 # (in Spanish) 2721 2722 # From Arthur David Olson (2009-03-09) 2723 # I listened over the Internet to 2724 # http://media.enet.cu/readioreloj 2725 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2726 # the time was announced as "diez cinco" - the same time as here, indicating 2727 # that has indeed switched to DST. Assume second Sunday from 2009 forward. 2728 2729 # From Steffen Thorsen (2011-03-08): 2730 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2731 # this year. Nothing about the end date known so far (if that has 2732 # changed at all). 2733 # 2734 # Source: 2735 # http://granma.co.cu/2011/03/08/nacional/artic01.html 2736 # 2737 # Our info: 2738 # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2739 # 2740 # From Steffen Thorsen (2011-10-30) 2741 # Cuba will end DST two weeks later this year. Instead of going back 2742 # tonight, it has been delayed to 2011-11-13 at 01:00. 2743 # 2744 # One source (Spanish) 2745 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2746 # 2747 # Our page: 2748 # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2749 # 2750 # From Steffen Thorsen (2012-03-01) 2751 # According to Radio Reloj, Cuba will start DST on Midnight between March 2752 # 31 and April 1. 2753 # 2754 # Radio Reloj has the following info (Spanish): 2755 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2756 # 2757 # Our info on it: 2758 # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2759 2760 # From Steffen Thorsen (2012-11-03): 2761 # Radio Reloj and many other sources report that Cuba is changing back 2762 # to standard time on 2012-11-04: 2763 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2764 # From Paul Eggert (2012-11-03): 2765 # For now, assume the future rule is first Sunday in November. 2766 2767 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2768 Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2769 Rule Cuba 1928 only - Oct 10 0:00 0 S 2770 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2771 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2772 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2773 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2774 Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2775 Rule Cuba 1965 only - Sep 30 0:00 0 S 2776 Rule Cuba 1966 only - May 29 0:00 1:00 D 2777 Rule Cuba 1966 only - Oct 2 0:00 0 S 2778 Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2779 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2780 Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2781 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2782 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2783 Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2784 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2785 Rule Cuba 1978 only - May 7 0:00 1:00 D 2786 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2787 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2788 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2789 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2790 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2791 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2792 Rule Cuba 1996 only - Oct 6 0:00s 0 S 2793 Rule Cuba 1997 only - Oct 12 0:00s 0 S 2794 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2795 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2796 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2797 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2798 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2799 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2800 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2801 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2802 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2803 Rule Cuba 2011 only - Nov 13 0:00s 0 S 2804 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 2805 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2806 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 2807 2808 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2809 Zone America/Havana -5:29:28 - LMT 1890 2810 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2811 -5:00 Cuba C%sT 2812 2813 # Dominica 2814 # See America/Port_of_Spain. 2815 2816 # Dominican Republic 2817 2818 # From Steffen Thorsen (2000-10-30): 2819 # Enrique Morales reported to me that the Dominican Republic has changed the 2820 # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2821 # http://www.listin.com.do/antes/261000/republica/princi.html 2822 2823 # From Paul Eggert (2000-12-04): 2824 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2825 2826 # From Rives McDow (2000-12-01): 2827 # Dominican Republic changed its mind and presidential decree on Tuesday, 2828 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2829 # Dominican Republic will be reverting to 8 hours from the International Date 2830 # Line, and will not be using DST in the foreseeable future. The reason they 2831 # decided to use DST was to be in synch with Puerto Rico, who was also going 2832 # to implement DST. When Puerto Rico didn't implement DST, the president 2833 # decided to revert. 2834 2835 2836 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2837 Rule DR 1966 only - Oct 30 0:00 1:00 D 2838 Rule DR 1967 only - Feb 28 0:00 0 S 2839 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2840 Rule DR 1970 only - Feb 21 0:00 0 S 2841 Rule DR 1971 only - Jan 20 0:00 0 S 2842 Rule DR 1972 1974 - Jan 21 0:00 0 S 2843 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2844 Zone America/Santo_Domingo -4:39:36 - LMT 1890 2845 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 2846 -5:00 DR E%sT 1974 Oct 27 2847 -4:00 - AST 2000 Oct 29 2:00 2848 -5:00 US E%sT 2000 Dec 3 1:00 2849 -4:00 - AST 2850 2851 # El Salvador 2852 2853 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2854 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 2855 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 2856 # There are too many San Salvadors elsewhere, so use America/El_Salvador 2857 # instead of America/San_Salvador. 2858 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2859 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 2860 -6:00 Salv C%sT 2861 2862 # Grenada 2863 # Guadeloupe 2864 # St Barthélemy 2865 # St Martin (French part) 2866 # See America/Port_of_Spain. 2867 2868 # Guatemala 2869 # 2870 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2871 # Diario Co Latino, at 2872 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 2873 # says in an article dated 2006-04-19 that the Guatemalan government had 2874 # decided on that date to advance official time by 60 minutes, to lessen the 2875 # impact of the elevated cost of oil.... Daylight saving time will last from 2876 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2877 # From Paul Eggert (2006-06-22): 2878 # The Ministry of Energy and Mines, press release CP-15/2006 2879 # (2006-04-19), says DST ends at 24:00. See 2880 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 2881 2882 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2883 Rule Guat 1973 only - Nov 25 0:00 1:00 D 2884 Rule Guat 1974 only - Feb 24 0:00 0 S 2885 Rule Guat 1983 only - May 21 0:00 1:00 D 2886 Rule Guat 1983 only - Sep 22 0:00 0 S 2887 Rule Guat 1991 only - Mar 23 0:00 1:00 D 2888 Rule Guat 1991 only - Sep 7 0:00 0 S 2889 Rule Guat 2006 only - Apr 30 0:00 1:00 D 2890 Rule Guat 2006 only - Oct 1 0:00 0 S 2891 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2892 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 2893 -6:00 Guat C%sT 2894 2895 # Haiti 2896 # From Gwillim Law (2005-04-15): 2897 # Risto O. Nykänen wrote me that Haiti is now on DST. 2898 # I searched for confirmation, and I found a press release 2899 # on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2900 # <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 2901 # 2902 # "The Prime Minister's Communication Office notifies the public in general 2903 # and the press in particular that, following a decision of the Interior 2904 # Ministry and the Territorial Collectivities [I suppose that means the 2905 # provinces], Haiti will move to Eastern Daylight Time in the night from next 2906 # Saturday the 2nd to Sunday the 3rd. 2907 # 2908 # "Consequently, the Prime Minister's Communication Office wishes to inform 2909 # the population that the country's clocks will be set forward one hour 2910 # starting at midnight. This provision will hold until the last Saturday in 2911 # October 2005. 2912 # 2913 # "Port-au-Prince, March 31, 2005" 2914 # 2915 # From Steffen Thorsen (2006-04-04): 2916 # I have been informed by users that Haiti observes DST this year like 2917 # last year, so the current "only" rule for 2005 might be changed to a 2918 # "max" rule or to last until 2006. (Who knows if they will observe DST 2919 # next year or if they will extend their DST like US/Canada next year). 2920 # 2921 # I have found this article about it (in French): 2922 # http://www.haitipressnetwork.com/news.cfm?articleID=7612 2923 # 2924 # The reason seems to be an energy crisis. 2925 2926 # From Stephen Colebourne (2007-02-22): 2927 # Some IATA info: Haiti won't be having DST in 2007. 2928 2929 # From Steffen Thorsen (2012-03-11): 2930 # According to several news sources, Haiti will observe DST this year, 2931 # apparently using the same start and end date as USA/Canada. 2932 # So this means they have already changed their time. 2933 # 2934 # http://www.alterpresse.org/spip.php?article12510 2935 # http://radiovision2000haiti.net/home/?p=13253 2936 # 2937 # From Arthur David Olson (2012-03-11): 2938 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 2939 # 3:00 a.m. rather than the traditional Haitian jump at midnight. 2940 # Assume a US-style fall back as well. 2941 2942 # From Steffen Thorsen (2013-03-10): 2943 # It appears that Haiti is observing DST this year as well, same rules 2944 # as US/Canada. They did it last year as well, and it looks like they 2945 # are going to observe DST every year now... 2946 # 2947 # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 2948 # http://www.canalplushaiti.net/?p=6714 2949 2950 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2951 Rule Haiti 1983 only - May 8 0:00 1:00 D 2952 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 2953 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2954 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2955 # Go with IATA. 2956 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 2957 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2958 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 2959 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 2960 Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 2961 Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S 2962 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2963 Zone America/Port-au-Prince -4:49:20 - LMT 1890 2964 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 2965 -5:00 Haiti E%sT 2966 2967 # Honduras 2968 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2969 2970 # From Paul Eggert (2006-05-05): 2971 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2972 # saying Honduras will start using DST midnight Saturday, effective 4 2973 # months until September. La Tribuna reported today 2974 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2975 # of Honduras, refused to back down on this. 2976 2977 # From Jesper Nørgaard Welen (2006-08-08): 2978 # It seems that Honduras has returned from DST to standard time this Monday at 2979 # 00:00 hours (prolonging Sunday to 25 hours duration). 2980 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 2981 2982 # From Paul Eggert (2006-08-08): 2983 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 2984 # http://www.elheraldo.hn/nota.php?nid=54941&sec=12 2985 # It mentions executive decree 18-2006. 2986 2987 # From Steffen Thorsen (2006-08-17): 2988 # Honduras will observe DST from 2007 to 2009, exact dates are not 2989 # published, I have located this authoritative source: 2990 # http://www.presidencia.gob.hn/noticia.aspx?nId=47 2991 2992 # From Steffen Thorsen (2007-03-30): 2993 # http://www.laprensahn.com/pais_nota.php?id04962=7386 2994 # So it seems that Honduras will not enter DST this year.... 2995 2996 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2997 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 2998 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 2999 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3000 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3001 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3002 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3003 -6:00 Hond C%sT 3004 # 3005 # Great Swan I ceded by US to Honduras in 1972 3006 3007 # Jamaica 3008 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3009 # unspecified official document, and says "This time is used throughout the 3010 # island". Go with Milne. Round to the nearest second as required by zic. 3011 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3012 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3013 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3014 -5:00 - EST 1974 Apr 28 2:00 3015 -5:00 US E%sT 1984 3016 -5:00 - EST 3017 3018 # Martinique 3019 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3020 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3021 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3022 -4:00 - AST 1980 Apr 6 3023 -4:00 1:00 ADT 1980 Sep 28 3024 -4:00 - AST 3025 3026 # Montserrat 3027 # See America/Port_of_Spain. 3028 3029 # Nicaragua 3030 # 3031 # This uses Shanks & Pottenger for times before 2005. 3032 # 3033 # From Steffen Thorsen (2005-04-12): 3034 # I've got reports from 8 different people that Nicaragua just started 3035 # DST on Sunday 2005-04-10, in order to save energy because of 3036 # expensive petroleum. The exact end date for DST is not yet 3037 # announced, only "September" but some sites also say "mid-September". 3038 # Some background information is available on the President's official site: 3039 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3040 # The Decree, no 23-2005 is available here: 3041 # 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 3042 # 3043 # From Paul Eggert (2005-05-01): 3044 # The decree doesn't say anything about daylight saving, but for now let's 3045 # assume that it is daylight saving.... 3046 # 3047 # From Gwillim Law (2005-04-21): 3048 # The Associated Press story on the time change, which can be found at 3049 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3050 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3051 # time that a change of clocks was applied to save energy was in the year 2000 3052 # during the Arnoldo Alemán administration."... 3053 # The northamerica file says that Nicaragua has been on UTC-6 continuously 3054 # since December 1998. I wasn't able to find any details of Nicaraguan time 3055 # changes in 2000. Perhaps a note could be added to the northamerica file, to 3056 # the effect that we have indirect evidence that DST was observed in 2000. 3057 # 3058 # From Jesper Nørgaard Welen (2005-11-02): 3059 # Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3060 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3061 # (2005-09-26) 3062 # 3063 # From Jesper Nørgaard Welen (2006-05-05): 3064 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3065 # (my informal translation) 3066 # By order of the president of the republic, Enrique Bolaños, Nicaragua 3067 # advanced by sixty minutes their official time, yesterday at 2 in the 3068 # morning, and will stay that way until 30th of September. 3069 # 3070 # From Jesper Nørgaard Welen (2006-09-30): 3071 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3072 # My informal translation runs: 3073 # The natural sun time is restored in all the national territory, in that the 3074 # time is returned one hour at 01:00 am of October 1 of 2006. 3075 # 3076 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3077 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3078 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3079 Rule Nic 2005 only - Apr 10 0:00 1:00 D 3080 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3081 Rule Nic 2006 only - Apr 30 2:00 1:00 D 3082 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3083 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3084 Zone America/Managua -5:45:08 - LMT 1890 3085 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3086 -6:00 - CST 1973 May 3087 -5:00 - EST 1975 Feb 16 3088 -6:00 Nic C%sT 1992 Jan 1 4:00 3089 -5:00 - EST 1992 Sep 24 3090 -6:00 - CST 1993 3091 -5:00 - EST 1997 3092 -6:00 Nic C%sT 3093 3094 # Panama 3095 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3096 Zone America/Panama -5:18:08 - LMT 1890 3097 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time 3098 -5:00 - EST 3099 3100 # Puerto Rico 3101 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3102 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3103 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3104 -4:00 - AST 1942 May 3 3105 -4:00 US A%sT 1946 3106 -4:00 - AST 3107 3108 # St Kitts-Nevis 3109 # St Lucia 3110 # See America/Port_of_Spain. 3111 3112 # St Pierre and Miquelon 3113 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3114 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3115 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3116 -4:00 - AST 1980 May 3117 -3:00 - PMST 1987 # Pierre & Miquelon Time 3118 -3:00 Canada PM%sT 3119 3120 # St Vincent and the Grenadines 3121 # See America/Port_of_Spain. 3122 3123 # Turks and Caicos 3124 # 3125 # From Chris Dunn in 3126 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 3127 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3128 # daylight saving dates for time changes have been adjusted to match 3129 # the recent U.S. change of dates. 3130 # 3131 # From Brian Inglis (2007-04-28): 3132 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3133 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3134 # rows before that there is an out of date entry for Oct: 3135 # "Eastern Standard Times Begins 2007 3136 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3137 # indicating that the normal ET rules are followed. 3138 # 3139 # From Paul Eggert (2014-08-19): 3140 # The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See: 3141 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3142 # Model this as a switch from EST/EDT to AST on 2014-11-02 at 02:00. 3143 # 3144 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3145 Zone America/Grand_Turk -4:44:32 - LMT 1890 3146 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3147 -5:00 - EST 1979 3148 -5:00 US E%sT 2014 Nov 2 2:00 3149 -4:00 - AST 3150 3151 # British Virgin Is 3152 # Virgin Is 3153 # See America/Port_of_Spain. 3154 3155 3156 # Local Variables: 3157 # coding: utf-8 3158 # End: