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 data 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). 32 33 # From Paul Eggert (1999-03-22): 34 # A reliable and entertaining source about time zones is 35 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 36 37 ############################################################################### 38 39 # United States 40 41 # From Paul Eggert (1999-03-31): 42 # Howse writes (pp 121-125) that time zones were invented by 43 # Professor Charles Ferdinand Dowd (1825-1904), 44 # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 45 # His pamphlet "A System of National Time for Railroads" (1870) 46 # was the result of his proposals at the Convention of Railroad Trunk Lines 47 # in New York City (1869-10). His 1870 proposal was based on Washington, DC, 48 # but in 1872-05 he moved the proposed origin to Greenwich. 49 # His proposal was adopted by the railroads on 1883-11-18 at 12:00, 50 # and the most of the country soon followed suit. 51 52 # From Paul Eggert (2005-04-16): 53 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 54 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 55 56 # From Paul Eggert (2006-03-22): 57 # A good source for time zone historical data in the US is 58 # Thomas G. Shanks, The American Atlas (5th edition), 59 # San Diego: ACS Publications, Inc. (1991). 60 # Make sure you have the errata sheet; the book is somewhat useless without it. 61 # It is the source for most of the pre-1991 US entries below. 62 63 # From Paul Eggert (2001-03-06): 64 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin 65 # in his whimsical essay "An Economical Project for Diminishing the Cost 66 # of Light" published in the Journal de Paris (1784-04-26). 67 # Not everyone is happy with the results: 68 # 69 # I don't really care how time is reckoned so long as there is some 70 # agreement about it, but I object to being told that I am saving 71 # daylight when my reason tells me that I am doing nothing of the kind. 72 # I even object to the implication that I am wasting something 73 # valuable if I stay in bed after the sun has risen. As an admirer 74 # of moonlight I resent the bossy insistence of those who want to 75 # reduce my time for enjoying it. At the back of the Daylight Saving 76 # scheme I detect the bony, blue-fingered hand of Puritanism, eager 77 # to push people into bed earlier, and get them up earlier, to make 78 # them healthy, wealthy and wise in spite of themselves. 79 # 80 # -- Robertson Davies, The diary of Samuel Marchbanks, 81 # Clarke, Irwin (1947), XIX, Sunday 82 # 83 # For more about the first ten years of DST in the United States, see 84 # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 85 # (Carnegie Library of Pittsburgh, 1927) 86 # <http://www.clpgh.org/exhibit/dst.html>. 87 # 88 # Shanks says that DST was called "War Time" in the US in 1918 and 1919. 89 # However, DST was imposed by the Standard Time Act of 1918, which 90 # was the first nationwide legal time standard, and apparently 91 # time was just called "Standard Time" or "Daylight Saving Time". 92 93 # From Arthur David Olson: 94 # US Daylight Saving Time ended on the last Sunday of *October* in 1974. 95 # See, for example, the front page of the Saturday, 1974-10-26 96 # and Sunday, 1974-10-27 editions of the Washington Post. 97 98 # From Arthur David Olson: 99 # Before the Uniform Time Act of 1966 took effect in 1967, observance of 100 # Daylight Saving Time in the US was by local option, except during wartime. 101 102 # From Arthur David Olson (2000-09-25): 103 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 104 # In the introduction, Oboler spoke of "Eastern Peace Time." 105 # An AltaVista search turned up 106 # <http://rowayton.org/rhs/hstaug45.html>: 107 # "When the time is announced over the radio now, it is 'Eastern Peace 108 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 109 # (August 1945) by way of confirmation. 110 111 # From Joseph Gallant citing 112 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 113 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 114 # to switch to London for Attlee's address, but the American people 115 # never got to hear his speech live. According to one press account, 116 # CBS' Bob Trout was first to announce the word of Japan's surrender, 117 # but a few seconds later, NBC, ABC and Mutual also flashed the word 118 # of surrender, all of whom interrupting the bells of Big Ben in 119 # London which were to precede Mr. Attlee's speech. 120 121 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 122 # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 123 # 124 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 125 # Any announcement from Asia would reach St. John's New York newsroom on a 126 # wire service teletype machine, which had prescribed signals for major news. 127 # Associated Press, for example, would ring five bells before spewing out 128 # typed copy of an important story, and 10 bells for news "of transcendental 129 # importance." 130 # 131 # On Aug. 14, stalling while talking steadily into the NBC networks' open 132 # microphone, St. John heard five bells and waited only to hear a sixth bell, 133 # before announcing confidently: "Ladies and gentlemen, World War II is over. 134 # The Japanese have agreed to our surrender terms." 135 # 136 # He had scored a 20-second scoop on other broadcasters. 137 138 # From Arthur David Olson (2005-08-22): 139 # Paul has been careful to use the "US" rules only in those locations 140 # that are part of the United States; this reflects the real scope of 141 # U.S. government action. So even though the "US" rules have changed 142 # in the latest release, other countries won't be affected. 143 144 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 145 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 146 Rule US 1918 1919 - Oct lastSun 2:00 0 S 147 Rule US 1942 only - Feb 9 2:00 1:00 W # War 148 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 149 Rule US 1945 only - Sep 30 2:00 0 S 150 Rule US 1967 2006 - Oct lastSun 2:00 0 S 151 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 152 Rule US 1974 only - Jan 6 2:00 1:00 D 153 Rule US 1975 only - Feb 23 2:00 1:00 D 154 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 155 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 156 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 157 Rule US 2007 max - Nov Sun>=1 2:00 0 S 158 159 # From Arthur David Olson, 2005-12-19 160 # We generate the files specified below to guard against old files with 161 # obsolete information being left in the time zone binary directory. 162 # We limit the list to names that have appeared in previous versions of 163 # this time zone package. 164 # We do these as separate Zones rather than as Links to avoid problems if 165 # a particular place changes whether it observes DST. 166 # We put these specifications here in the northamerica file both to 167 # increase the chances that they'll actually get compiled and to 168 # avoid the need to duplicate the US rules in another file. 169 170 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 171 Zone EST -5:00 - EST 172 Zone MST -7:00 - MST 173 Zone HST -10:00 - HST 174 Zone EST5EDT -5:00 US E%sT 175 Zone CST6CDT -6:00 US C%sT 176 Zone MST7MDT -7:00 US M%sT 177 Zone PST8PDT -8:00 US P%sT 178 179 # From Bob Devine (1988-01-28): 180 # ...Alaska (and Hawaii) had the timezone names changed in 1967. 181 # old new 182 # Pacific Standard Time(PST) -same- 183 # Yukon Standard Time(YST) -same- 184 # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 185 # Nome Standard Time (NT) Bering Standard Time (BST) 186 # 187 # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 188 # The YST zone now covers nearly all of the state, AHST just part 189 # of the Aleutian islands. No DST. 190 191 # From Paul Eggert (1995-12-19): 192 # The tables below use 'NST', not 'NT', for Nome Standard Time. 193 # I invented 'CAWT' for Central Alaska War Time. 194 195 # From U. S. Naval Observatory (1989-01-19): 196 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 197 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 198 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 199 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 200 # USA MOUNTAIN 7 H BEHIND UTC DENVER 201 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 202 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 203 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 204 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 205 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 206 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 207 # USA " 9 H BEHIND UTC APR 3 - OCT 30 208 # USA HAWAII 10 H BEHIND UTC 209 # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 210 211 # From Arthur David Olson (1989-01-21): 212 # The above dates are for 1988. 213 # Note the "AKST" and "AKDT" abbreviations, the claim that there's 214 # no DST in Samoa, and the claim that there is DST in Alaska and the 215 # Aleutians. 216 217 # From Arthur David Olson (1988-02-13): 218 # Legal standard time zone names, from United States Code (1982 Edition and 219 # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 220 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 221 # took effect), as explained in sections 263 and 261: 222 # (none) 223 # United States standard eastern time 224 # United States standard mountain time 225 # United States standard central time 226 # United States standard Pacific time 227 # (none) 228 # United States standard Alaska time 229 # (none) 230 # Next, names from 1967-04-01 until 1983-11-30 (the date for 231 # public law 98-181): 232 # Atlantic standard time 233 # eastern standard time 234 # central standard time 235 # mountain standard time 236 # Pacific standard time 237 # Yukon standard time 238 # Alaska-Hawaii standard time 239 # Bering standard time 240 # And after 1983-11-30: 241 # Atlantic standard time 242 # eastern standard time 243 # central standard time 244 # mountain standard time 245 # Pacific standard time 246 # Alaska standard time 247 # Hawaii-Aleutian standard time 248 # Samoa standard time 249 # The law doesn't give abbreviations. 250 # 251 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 252 # Public law 106-564 (2000-12-23) introduced the abbreviation 253 # "Chamorro Standard Time" for time in Guam and the Northern Marianas. 254 # See the file "australasia". 255 256 # From Arthur David Olson, 2005-08-09 257 # The following was signed into law on 2005-08-08. 258 # 259 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 260 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 261 # U.S.C. 260a(a)) is amended-- 262 # (1) by striking "first Sunday of April" and inserting "second 263 # Sunday of March"; and 264 # (2) by striking "last Sunday of October" and inserting "first 265 # Sunday of November'. 266 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the 267 # date of enactment of this Act or March 1, 2007, whichever is later. 268 # (c) Report to Congress.--Not later than 9 months after the effective 269 # date stated in subsection (b), the Secretary shall report to Congress 270 # on the impact of this section on energy consumption in the United 271 # States. 272 # (d) Right to Revert.--Congress retains the right to revert the 273 # Daylight Saving Time back to the 2005 time schedules once the 274 # Department study is complete. 275 276 # US eastern time, represented by New York 277 278 # Connecticut, Delaware, District of Columbia, most of Florida, 279 # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 280 # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 281 # New Hampshire, New Jersey, New York, North Carolina, Ohio, 282 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 283 # Vermont, Virginia, West Virginia 284 285 # From Dave Cantor (2004-11-02): 286 # Early this summer I had the occasion to visit the Mount Washington 287 # Observatory weather station atop (of course!) Mount Washington [, NH].... 288 # One of the staff members said that the station was on Eastern Standard Time 289 # and didn't change their clocks for Daylight Saving ... so that their 290 # reports will always have times which are 5 hours behind UTC. 291 292 # From Paul Eggert (2005-08-26): 293 # According to today's Huntsville Times 294 # <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 295 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City 296 # in Russell County, Lanett in Chambers County and some towns in Lee County, 297 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 298 # Roberts, city administrator in Phenix City. as saying "We are in the Central 299 # time zone, but we do go by the Eastern time zone because so many people work 300 # in Columbus." 301 302 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 303 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 304 Rule NYC 1920 only - Oct lastSun 2:00 0 S 305 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 306 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 307 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 308 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 309 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 310 -5:00 US E%sT 1920 311 -5:00 NYC E%sT 1942 312 -5:00 US E%sT 1946 313 -5:00 NYC E%sT 1967 314 -5:00 US E%sT 315 316 # US central time, represented by Chicago 317 318 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 319 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 320 # Washington counties), Illinois, western Indiana 321 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 322 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 323 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 324 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 325 # western Tennessee, most of Texas, Wisconsin 326 327 # From Larry M. Smith (2006-04-26) re Wisconsin: 328 # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 329 # is currently enforced at the 01:00 time of change. Because the local 330 # "bar time" in the state corresponds to 02:00, a number of citations 331 # are issued for the "sale of class 'B' alcohol after prohibited 332 # hours" within the deviated hour of this change every year.... 333 # 334 # From Douglas R. Bomberg (2007-03-12): 335 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 336 # Statue 175 closer in synch with the US Congress' intent.... 337 # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 338 339 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 340 Rule Chicago 1920 only - Jun 13 2:00 1:00 D 341 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 342 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 343 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 344 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 345 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 346 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 347 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 348 -6:00 US C%sT 1920 349 -6:00 Chicago C%sT 1936 Mar 1 2:00 350 -5:00 - EST 1936 Nov 15 2:00 351 -6:00 Chicago C%sT 1942 352 -6:00 US C%sT 1946 353 -6:00 Chicago C%sT 1967 354 -6:00 US C%sT 355 # Oliver County, ND switched from mountain to central time on 1992-10-25. 356 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 357 -7:00 US M%sT 1992 Oct 25 02:00 358 -6:00 US C%sT 359 # Morton County, ND, switched from mountain to central time on 360 # 2003-10-26, except for the area around Mandan which was already central time. 361 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 362 # Officially this switch also included part of Sioux County, and 363 # Jones, Mellette, and Todd Counties in South Dakota; 364 # but in practice these other counties were already observing central time. 365 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 366 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 367 -7:00 US M%sT 2003 Oct 26 02:00 368 -6:00 US C%sT 369 370 # From Josh Findley (2011-01-21): 371 # ...it appears that Mercer County, North Dakota, changed from the 372 # mountain time zone to the central time zone at the last transition from 373 # daylight-saving to standard time (on Nov. 7, 2010): 374 # http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 375 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 376 377 # From Andy Lipscomb (2011-01-24): 378 # ...according to the Census Bureau, the largest city is Beulah (although 379 # it's commonly referred to as Beulah-Hazen, with Hazen being the next 380 # largest city in Mercer County). Google Maps places Beulah's city hall 381 # at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 382 # of 6h47'07". 383 384 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 385 -7:00 US M%sT 2010 Nov 7 2:00 386 -6:00 US C%sT 387 388 # US mountain time, represented by Denver 389 # 390 # Colorado, far western Kansas, Montana, western 391 # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 392 # New Mexico, southwestern North Dakota, 393 # western South Dakota, far western Texas (El Paso County, Hudspeth County, 394 # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 395 # 396 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 397 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 398 Rule Denver 1920 only - Oct lastSun 2:00 0 S 399 Rule Denver 1921 only - May 22 2:00 0 S 400 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 401 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 402 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 403 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 404 -7:00 US M%sT 1920 405 -7:00 Denver M%sT 1942 406 -7:00 US M%sT 1946 407 -7:00 Denver M%sT 1967 408 -7:00 US M%sT 409 410 # US Pacific time, represented by Los Angeles 411 # 412 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 413 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 414 # north of the Salmon River, and the towns of Burgdorf and Warren), 415 # Nevada (except West Wendover), Oregon (except the northern 3/4 of 416 # Malheur county), and Washington 417 # 418 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 419 Rule CA 1948 only - Mar 14 2:00 1:00 D 420 Rule CA 1949 only - Jan 1 2:00 0 S 421 Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 422 Rule CA 1950 1961 - Sep lastSun 2:00 0 S 423 Rule CA 1962 1966 - Oct lastSun 2:00 0 S 424 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 425 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 426 -8:00 US P%sT 1946 427 -8:00 CA P%sT 1967 428 -8:00 US P%sT 429 430 # Alaska 431 # AK%sT is the modern abbreviation for -9:00 per USNO. 432 # 433 # From Paul Eggert (2001-05-30): 434 # Howse writes that Alaska switched from the Julian to the Gregorian calendar, 435 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 436 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 437 # also a Friday. Include only the time zone part of this transition, 438 # ignoring the switch from Julian to Gregorian, since we can't represent 439 # the Julian calendar. 440 # 441 # As far as we know, none of the exact locations mentioned below were 442 # permanently inhabited in 1867 by anyone using either calendar. 443 # (Yakutat was colonized by the Russians in 1799, but the settlement 444 # was destroyed in 1805 by a Yakutat-kon war party.) However, there 445 # were nearby inhabitants in some cases and for our purposes perhaps 446 # it's best to simply use the official transition. 447 448 # From Paul Eggert (2014-07-18): 449 # One opinion of the early-1980s turmoil in Alaska over time zones and 450 # daylight saving time appeared as graffiti on a Juneau airport wall: 451 # "Welcome to Juneau. Please turn your watch back to the 19th century." 452 # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 453 # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 454 # 455 # Steve Ferguson (2011-01-31) referred to the following source: 456 # Norris F. Keeping time in Alaska: national directives, local response. 457 # Alaska History 2001;16(1-2). 458 # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 459 460 # From Arthur David Olson (2011-02-01): 461 # Here's database-relevant material from the 2001 "Alaska History" article: 462 # 463 # On September 20 [1979]...DOT...officials decreed that on April 27, 464 # 1980, Juneau and other nearby communities would move to Yukon Time. 465 # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 466 # Pacific Time. 467 # 468 # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 469 # Department's September 1979 decision. Juneau and other communities in 470 # northern Southeast reverted to Pacific Time on October 26. 471 # 472 # On October 28 [1983]...the Metlakatla Indian Community Council voted 473 # unanimously to keep the reservation on Pacific Time. 474 # 475 # According to DOT official Joanne Petrie, Indian reservations are not 476 # bound to follow time zones imposed by neighboring jurisdictions. 477 # 478 # (The last is consistent with how the database now handles the Navajo 479 # Nation.) 480 481 # From Arthur David Olson (2011-02-09): 482 # I just spoke by phone with a staff member at the Metlakatla Indian 483 # Community office (using contact information available at 484 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 485 # It's shortly after 1:00 here on the east coast of the United States; 486 # the staffer said it was shortly after 10:00 there. When I asked whether 487 # that meant they were on Pacific time, they said no - they were on their 488 # own time. I asked about daylight saving; they said it wasn't used. I 489 # did not inquire about practices in the past. 490 491 # From Arthur David Olson (2011-08-17): 492 # For lack of better information, assume that Metlakatla's 493 # abandonment of use of daylight saving resulted from the 1983 vote. 494 495 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 496 Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 497 -8:57:41 - LMT 1900 Aug 20 12:00 498 -8:00 - PST 1942 499 -8:00 US P%sT 1946 500 -8:00 - PST 1969 501 -8:00 US P%sT 1980 Apr 27 2:00 502 -9:00 US Y%sT 1980 Oct 26 2:00 503 -8:00 US P%sT 1983 Oct 30 2:00 504 -9:00 US Y%sT 1983 Nov 30 505 -9:00 US AK%sT 506 Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 507 -9:01:13 - LMT 1900 Aug 20 12:00 508 -8:00 - PST 1942 509 -8:00 US P%sT 1946 510 -8:00 - PST 1969 511 -8:00 US P%sT 1983 Oct 30 2:00 512 -9:00 US Y%sT 1983 Nov 30 513 -9:00 US AK%sT 514 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 515 -8:46:18 - LMT 1900 Aug 20 12:00 516 -8:00 - PST 1942 517 -8:00 US P%sT 1946 518 -8:00 - PST 1969 519 -8:00 US P%sT 1983 Oct 30 2:00 520 -8:00 - PST 521 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 522 -9:18:55 - LMT 1900 Aug 20 12:00 523 -9:00 - YST 1942 524 -9:00 US Y%sT 1946 525 -9:00 - YST 1969 526 -9:00 US Y%sT 1983 Nov 30 527 -9:00 US AK%sT 528 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 529 -9:59:36 - LMT 1900 Aug 20 12:00 530 -10:00 - CAT 1942 531 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 532 -10:00 US CAT/CAPT 1946 # Peace 533 -10:00 - CAT 1967 Apr 534 -10:00 - AHST 1969 535 -10:00 US AH%sT 1983 Oct 30 2:00 536 -9:00 US Y%sT 1983 Nov 30 537 -9:00 US AK%sT 538 Zone America/Nome 12:58:21 - LMT 1867 Oct 18 539 -11:01:38 - LMT 1900 Aug 20 12:00 540 -11:00 - NST 1942 541 -11:00 US N%sT 1946 542 -11:00 - NST 1967 Apr 543 -11:00 - BST 1969 544 -11:00 US B%sT 1983 Oct 30 2:00 545 -9:00 US Y%sT 1983 Nov 30 546 -9:00 US AK%sT 547 Zone America/Adak 12:13:21 - LMT 1867 Oct 18 548 -11:46:38 - LMT 1900 Aug 20 12:00 549 -11:00 - NST 1942 550 -11:00 US N%sT 1946 551 -11:00 - NST 1967 Apr 552 -11:00 - BST 1969 553 -11:00 US B%sT 1983 Oct 30 2:00 554 -10:00 US AH%sT 1983 Nov 30 555 -10:00 US HA%sT 556 # The following switches don't quite make our 1970 cutoff. 557 # 558 # Shanks writes that part of southwest Alaska (e.g. Aniak) 559 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 560 # and another part (e.g. Akiak) made the same switch five weeks later. 561 # 562 # From David Flater (2004-11-09): 563 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 564 # Historic Preservation Commission, provided this information, which 565 # suggests that Unalaska deviated from statutory time from early 1967 566 # possibly until 1983: 567 # 568 # Minutes of the Unalaska City Council Meeting, January 10, 1967: 569 # "Except for St. Paul and Akutan, Unalaska is the only important 570 # location not on Alaska Standard Time. The following resolution was 571 # made by William Robinson and seconded by Henry Swanson: Be it 572 # resolved that the City of Unalaska hereby goes to Alaska Standard 573 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 574 # January 14, Alaska Standard Time.) This resolution was passed with 575 # three votes for and one against." 576 577 # Hawaii 578 579 # From Arthur David Olson (2010-12-09): 580 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 581 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 582 # the article is available at 583 # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 584 # and indicates that standard time was adopted effective noon, January 585 # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 586 # saving for the period between the last Sunday of each April and the 587 # last Sunday of each September, but less than a month later repealed the 588 # act," (page 220), that year-round daylight saving time was in effect 589 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 590 # when clocks changed) and that clocks were changed by 30 minutes 591 # effective the second Sunday of June, 1947 (page 219, with no time of 592 # day given for when clocks changed). A footnote for the 1933 changes 593 # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 594 # and Act 163 (approved 21 May 1933)." 595 596 # From Arthur David Olson (2011-01-19): 597 # The following is from "Laws of the Territory of Hawaii Passed by the 598 # Seventeenth Legislature: Regular Session 1933," available (as of 599 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act 600 # 90...At 2 o'clock ante meridian of the last Sunday in April of each 601 # year, the standard time of this Territory shall be advanced one 602 # hour...This Act shall take effect upon its approval. Approved this 26th 603 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 604 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 605 # hereby repealed...This Act shall take effect upon its approval, upon 606 # which date the standard time of this Territory shall be restored to 607 # that existing immediately prior to the taking effect of said Act 90. 608 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 609 # of the Territory of Hawaii." 610 # 611 # Note that 1933-05-21 was a Sunday. 612 # We're left to guess the time of day when Act 163 was approved; guess noon. 613 614 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox 615 -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 616 -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 617 -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 618 -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2 619 -10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2 620 -10:00 - HST 621 622 Link Pacific/Honolulu Pacific/Johnston 623 624 # Now we turn to US areas that have diverged from the consensus since 1970. 625 626 # Arizona mostly uses MST. 627 628 # From Paul Eggert (2002-10-20): 629 # 630 # The information in the rest of this paragraph is derived from the 631 # Daylight Saving Time web page 632 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 633 # maintained by the Arizona State Library, Archives and Public Records. 634 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 635 # time, but by federal law railroads, airlines, bus lines, military 636 # personnel, and some engaged in interstate commerce continued to 637 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 638 # Gazette says that was the date the law changed, and that 04-01 was 639 # the date the state's clocks would change. In 1945 the State of 640 # Arizona used standard time all year, again with exceptions only as 641 # mandated by federal law. Arizona observed DST in 1967, but Arizona 642 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 643 # 644 # Shanks says the 1944 experiment came to an end on 1944-03-17. 645 # Go with the Arizona State Library instead. 646 647 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 648 -7:00 US M%sT 1944 Jan 1 00:01 649 -7:00 - MST 1944 Apr 1 00:01 650 -7:00 US M%sT 1944 Oct 1 00:01 651 -7:00 - MST 1967 652 -7:00 US M%sT 1968 Mar 21 653 -7:00 - MST 654 # From Arthur David Olson (1988-02-13): 655 # A writer from the Inter Tribal Council of Arizona, Inc., 656 # notes in private correspondence dated 1987-12-28 that "Presently, only the 657 # Navajo Nation participates in the Daylight Saving Time policy, due to its 658 # large size and location in three states." (The "only" means that other 659 # tribal nations don't use DST.) 660 # 661 # From Paul Eggert (2013-08-26): 662 # See America/Denver for a zone appropriate for the Navajo Nation. 663 664 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 665 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 666 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 667 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 668 # Teton, Twin Falls, Valley, Washington counties, and the southern 669 # quarter of Idaho county) and eastern Oregon (most of Malheur County) 670 # switched four weeks late in 1974. 671 # 672 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 673 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 674 -8:00 US P%sT 1923 May 13 2:00 675 -7:00 US M%sT 1974 676 -7:00 - MST 1974 Feb 3 2:00 677 -7:00 US M%sT 678 679 # Indiana 680 # 681 # For a map of Indiana's time zone regions, see: 682 # What time is it in Indiana? (2006-03-01) 683 # <http://www.mccsc.edu/time.html> 684 # 685 # From Paul Eggert (2007-08-17): 686 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 687 # with the following exceptions: 688 # 689 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 690 # Vanderburgh, and Warrick counties have been like America/Chicago. 691 # 692 # - Dearborn and Ohio counties have been like America/New_York. 693 # 694 # - Clark, Floyd, and Harrison counties have been like 695 # America/Kentucky/Louisville. 696 # 697 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 698 # and Switzerland counties have their own time zone histories as noted below. 699 # 700 # Shanks partitioned Indiana into 345 regions, each with its own time history, 701 # and wrote "Even newspaper reports present contradictory information." 702 # Those Hoosiers! Such a flighty and changeable people! 703 # Fortunately, most of the complexity occurred before our cutoff date of 1970. 704 # 705 # Other than Indianapolis, the Indiana place names are so nondescript 706 # that they would be ambiguous if we left them at the 'America' level. 707 # So we reluctantly put them all in a subdirectory 'America/Indiana'. 708 709 # From Paul Eggert (2005-08-16): 710 # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 711 712 # From Paul Eggert (2014-06-26): 713 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 714 # says "DOT is relocating the time zone boundary in Indiana to move Starke, 715 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 716 # Eastern Time Zone to the Central Time Zone.... The effective date of 717 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 718 # changeover date from standard time to Daylight Saving Time." 719 # Strictly speaking, this meant the affected counties changed their 720 # clocks twice that night, but this obviously was in error. The intent 721 # was that 01:59:59 EST be followed by 02:00:00 CDT. 722 723 # From Gwillim Law (2007-02-10): 724 # The Associated Press has been reporting that Pulaski County, Indiana is 725 # going to switch from Central to Eastern Time on March 11, 2007.... 726 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 727 728 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 729 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 730 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 731 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 732 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 733 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 734 -6:00 US C%sT 1920 735 -6:00 Indianapolis C%sT 1942 736 -6:00 US C%sT 1946 737 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 738 -5:00 - EST 1957 Sep 29 2:00 739 -6:00 - CST 1958 Apr 27 2:00 740 -5:00 - EST 1969 741 -5:00 US E%sT 1971 742 -5:00 - EST 2006 743 -5:00 US E%sT 744 # 745 # Eastern Crawford County, Indiana, left its clocks alone in 1974, 746 # as well as from 1976 through 2005. 747 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 748 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 749 Rule Marengo 1951 only - Sep lastSun 2:00 0 S 750 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 751 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 752 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 753 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 754 -6:00 US C%sT 1951 755 -6:00 Marengo C%sT 1961 Apr 30 2:00 756 -5:00 - EST 1969 757 -5:00 US E%sT 1974 Jan 6 2:00 758 -6:00 1:00 CDT 1974 Oct 27 2:00 759 -5:00 US E%sT 1976 760 -5:00 - EST 2006 761 -5:00 US E%sT 762 # 763 # Daviess, Dubois, Knox, and Martin Counties, Indiana, 764 # switched from eastern to central time in April 2006, then switched back 765 # in November 2007. 766 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 767 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 768 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 769 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 770 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 771 Rule Vincennes 1955 only - May 1 0:00 1:00 D 772 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 773 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 774 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 775 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 776 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 777 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 778 -6:00 US C%sT 1946 779 -6:00 Vincennes C%sT 1964 Apr 26 2:00 780 -5:00 - EST 1969 781 -5:00 US E%sT 1971 782 -5:00 - EST 2006 Apr 2 2:00 783 -6:00 US C%sT 2007 Nov 4 2:00 784 -5:00 US E%sT 785 # 786 # Perry County, Indiana, switched from eastern to central time in April 2006. 787 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 788 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 789 Rule Perry 1946 only - Sep lastSun 2:00 0 S 790 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 791 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 792 Rule Perry 1955 only - May 1 0:00 1:00 D 793 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 794 Rule Perry 1960 only - Oct lastSun 2:00 0 S 795 Rule Perry 1961 only - Sep lastSun 2:00 0 S 796 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 797 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 798 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 799 -6:00 US C%sT 1946 800 -6:00 Perry C%sT 1964 Apr 26 2:00 801 -5:00 - EST 1969 802 -5:00 US E%sT 1971 803 -5:00 - EST 2006 Apr 2 2:00 804 -6:00 US C%sT 805 # 806 # Pike County, Indiana moved from central to eastern time in 1977, 807 # then switched back in 2006, then switched back again in 2007. 808 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 809 Rule Pike 1955 only - May 1 0:00 1:00 D 810 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 811 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 812 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 813 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 814 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 815 -6:00 US C%sT 1955 816 -6:00 Pike C%sT 1965 Apr 25 2:00 817 -5:00 - EST 1966 Oct 30 2:00 818 -6:00 US C%sT 1977 Oct 30 2:00 819 -5:00 - EST 2006 Apr 2 2:00 820 -6:00 US C%sT 2007 Nov 4 2:00 821 -5:00 US E%sT 822 # 823 # Starke County, Indiana moved from central to eastern time in 1991, 824 # then switched back in 2006. 825 # From Arthur David Olson (1991-10-28): 826 # An article on page A3 of the Sunday, 1991-10-27 Washington Post 827 # notes that Starke County switched from Central time to Eastern time as of 828 # 1991-10-27. 829 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 830 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 831 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 832 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 833 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 834 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 835 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 836 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 837 -6:00 US C%sT 1947 838 -6:00 Starke C%sT 1962 Apr 29 2:00 839 -5:00 - EST 1963 Oct 27 2:00 840 -6:00 US C%sT 1991 Oct 27 2:00 841 -5:00 - EST 2006 Apr 2 2:00 842 -6:00 US C%sT 843 # 844 # Pulaski County, Indiana, switched from eastern to central time in 845 # April 2006 and then switched back in March 2007. 846 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 847 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 848 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 849 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 850 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 851 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 852 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 853 -6:00 US C%sT 1946 854 -6:00 Pulaski C%sT 1961 Apr 30 2:00 855 -5:00 - EST 1969 856 -5:00 US E%sT 1971 857 -5:00 - EST 2006 Apr 2 2:00 858 -6:00 US C%sT 2007 Mar 11 2:00 859 -5:00 US E%sT 860 # 861 # Switzerland County, Indiana, did not observe DST from 1973 through 2005. 862 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 863 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 864 -6:00 US C%sT 1954 Apr 25 2:00 865 -5:00 - EST 1969 866 -5:00 US E%sT 1973 867 -5:00 - EST 2006 868 -5:00 US E%sT 869 870 # Part of Kentucky left its clocks alone in 1974. 871 # This also includes Clark, Floyd, and Harrison counties in Indiana. 872 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 873 Rule Louisville 1921 only - May 1 2:00 1:00 D 874 Rule Louisville 1921 only - Sep 1 2:00 0 S 875 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 876 Rule Louisville 1941 only - Sep lastSun 2:00 0 S 877 Rule Louisville 1946 only - Jun 2 2:00 0 S 878 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 879 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 880 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 881 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 882 -6:00 US C%sT 1921 883 -6:00 Louisville C%sT 1942 884 -6:00 US C%sT 1946 885 -6:00 Louisville C%sT 1961 Jul 23 2:00 886 -5:00 - EST 1968 887 -5:00 US E%sT 1974 Jan 6 2:00 888 -6:00 1:00 CDT 1974 Oct 27 2:00 889 -5:00 US E%sT 890 # 891 # Wayne County, Kentucky 892 # 893 # From Lake Cumberland LIFE 894 # <http://www.lake-cumberland.com/life/archive/news990129time.shtml> 895 # (1999-01-29) via WKYM-101.7: 896 # Clinton County has joined Wayne County in asking the DoT to change from 897 # the Central to the Eastern time zone.... The Wayne County government made 898 # the same request in December. And while Russell County officials have not 899 # taken action, the majority of respondents to a poll conducted there in 900 # August indicated they would like to change to "fast time" also. 901 # The three Lake Cumberland counties are the farthest east of any U.S. 902 # location in the Central time zone. 903 # 904 # From Rich Wales (2000-08-29): 905 # After prolonged debate, and despite continuing deep differences of opinion, 906 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 907 # (-0500) time. They won't "fall back" this year. See Sara Shipley, 908 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 909 # 910 # From Paul Eggert (2001-07-16): 911 # The final rule was published in the 912 # Federal Register 65, 160 (2000-08-17), pp 50154-50158. 913 # <http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22> 914 # 915 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 916 -6:00 US C%sT 1946 917 -6:00 - CST 1968 918 -6:00 US C%sT 2000 Oct 29 2:00 919 -5:00 US E%sT 920 921 922 # From Rives McDow (2000-08-30): 923 # Here ... are all the changes in the US since 1985. 924 # Kearny County, KS (put all of county on central; 925 # previously split between MST and CST) ... 1990-10 926 # Starke County, IN (from CST to EST) ... 1991-10 927 # Oliver County, ND (from MST to CST) ... 1992-10 928 # West Wendover, NV (from PST TO MST) ... 1999-10 929 # Wayne County, KY (from CST to EST) ... 2000-10 930 # 931 # From Paul Eggert (2001-07-17): 932 # We don't know where the line used to be within Kearny County, KS, 933 # so omit that change for now. 934 # See America/Indiana/Knox for the Starke County, IN change. 935 # See America/North_Dakota/Center for the Oliver County, ND change. 936 # West Wendover, NV officially switched from Pacific to mountain time on 937 # 1999-10-31. See the 938 # Federal Register 64, 203 (1999-10-21), pp 56705-56707. 939 # <http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15> 940 # However, the Federal Register says that West Wendover already operated 941 # on mountain time, and the rule merely made this official; 942 # hence a separate tz entry is not needed. 943 944 # Michigan 945 # 946 # From Bob Devine (1988-01-28): 947 # Michigan didn't observe DST from 1968 to 1973. 948 # 949 # From Paul Eggert (1999-03-31): 950 # Shanks writes that Michigan started using standard time on 1885-09-18, 951 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 952 # that Detroit kept 953 # 954 # local time until 1900 when the City Council decreed that clocks should 955 # be put back twenty-eight minutes to Central Standard Time. Half the 956 # city obeyed, half refused. After considerable debate, the decision 957 # was rescinded and the city reverted to Sun time. A derisive offer to 958 # erect a sundial in front of the city hall was referred to the 959 # Committee on Sewers. Then, in 1905, Central time was adopted 960 # by city vote. 961 # 962 # This story is too entertaining to be false, so go with Howse over Shanks. 963 # 964 # From Paul Eggert (2001-03-06): 965 # Garland (1927) writes "Cleveland and Detroit advanced their clocks 966 # one hour in 1914." This change is not in Shanks. We have no more 967 # info, so omit this for now. 968 # 969 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 970 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 971 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 972 Rule Detroit 1948 only - Sep lastSun 2:00 0 S 973 Rule Detroit 1967 only - Jun 14 2:00 1:00 D 974 Rule Detroit 1967 only - Oct lastSun 2:00 0 S 975 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 976 Zone America/Detroit -5:32:11 - LMT 1905 977 -6:00 - CST 1915 May 15 2:00 978 -5:00 - EST 1942 979 -5:00 US E%sT 1946 980 -5:00 Detroit E%sT 1973 981 -5:00 US E%sT 1975 982 -5:00 - EST 1975 Apr 27 2:00 983 -5:00 US E%sT 984 # 985 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 986 # switched from EST to CST/CDT in 1973. 987 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 988 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 989 Rule Menominee 1946 only - Sep lastSun 2:00 0 S 990 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 991 Rule Menominee 1966 only - Oct lastSun 2:00 0 S 992 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 993 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 994 -6:00 US C%sT 1946 995 -6:00 Menominee C%sT 1969 Apr 27 2:00 996 -5:00 - EST 1973 Apr 29 2:00 997 -6:00 US C%sT 998 999 # Navassa 1000 # administered by the US Fish and Wildlife Service 1001 # claimed by US under the provisions of the 1856 Guano Islands Act 1002 # also claimed by Haiti 1003 # occupied 1857/1900 by the Navassa Phosphate Co 1004 # US lighthouse 1917/1996-09 1005 # currently uninhabited 1006 # see Mark Fineman, "An Isle Rich in Guano and Discord", 1007 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1008 # Jimmy Skaggs, _The Great Guano Rush_ (1994). 1009 1010 ################################################################################ 1011 1012 1013 # From Paul Eggert (2006-03-22): 1014 # A good source for time zone historical data outside the U.S. is 1015 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1016 # San Diego: ACS Publications, Inc. (2003). 1017 # 1018 # Gwillim Law writes that a good source 1019 # for recent time zone data is the International Air Transport 1020 # Association's Standard Schedules Information Manual (IATA SSIM), 1021 # published semiannually. Law sent in several helpful summaries 1022 # of the IATA's data after 1990. 1023 # 1024 # Except where otherwise noted, Shanks & Pottenger is the source for 1025 # entries through 1990, and IATA SSIM is the source for entries afterwards. 1026 # 1027 # Other sources occasionally used include: 1028 # 1029 # Edward W. Whitman, World Time Differences, 1030 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1031 # which I found in the UCLA library. 1032 # 1033 # William Willett, The Waste of Daylight, 19th edition 1034 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1035 # [PDF] (1914-03) 1036 # 1037 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1038 # <http://www.jstor.org/stable/1774359>. 1039 # 1040 # See the 'europe' file for Greenland. 1041 1042 # Canada 1043 1044 # From Alain LaBonté (1994-11-14): 1045 # I post here the time zone abbreviations standardized in Canada 1046 # for both English and French in the CAN/CSA-Z234.4-89 standard.... 1047 # 1048 # UTC Standard time Daylight saving time 1049 # offset French English French English 1050 # -2:30 - - HAT NDT 1051 # -3 - - HAA ADT 1052 # -3:30 HNT NST - - 1053 # -4 HNA AST HAE EDT 1054 # -5 HNE EST HAC CDT 1055 # -6 HNC CST HAR MDT 1056 # -7 HNR MST HAP PDT 1057 # -8 HNP PST HAY YDT 1058 # -9 HNY YST - - 1059 # 1060 # HN: Heure Normale ST: Standard Time 1061 # HA: Heure Avancée DT: Daylight saving Time 1062 # 1063 # A: de l'Atlantique Atlantic 1064 # C: du Centre Central 1065 # E: de l'Est Eastern 1066 # M: Mountain 1067 # N: Newfoundland 1068 # P: du Pacifique Pacific 1069 # R: des Rocheuses 1070 # T: de Terre-Neuve 1071 # Y: du Yukon Yukon 1072 # 1073 # From Paul Eggert (1994-11-22): 1074 # Alas, this sort of thing must be handled by localization software. 1075 1076 # Unless otherwise specified, the data for Canada are all from Shanks 1077 # & Pottenger. 1078 1079 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1080 # 2007-03-01): 1081 # The British Columbia government announced yesterday that it will 1082 # adjust daylight savings next year to align with changes in the 1083 # U.S. and the rest of Canada.... 1084 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1085 # ... 1086 # Nova Scotia 1087 # Daylight saving time will be extended by four weeks starting in 2007.... 1088 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1089 # 1090 # [For New Brunswick] the new legislation dictates that the time change is to 1091 # be done at 02:00 instead of 00:01. 1092 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1093 # ... 1094 # Manitoba has traditionally changed the clock every fall at 03:00. 1095 # As of 2006, the transition is to take place one hour earlier at 02:00. 1096 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1097 # ... 1098 # [Alberta, Ontario, Quebec] will follow US rules. 1099 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1100 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1101 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1102 # ... 1103 # P.E.I. will follow US rules.... 1104 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1105 # ... 1106 # Province of Newfoundland and Labrador.... 1107 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1108 # ... 1109 # Yukon 1110 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1111 # ... 1112 # N.W.T. will follow US rules. Whoever maintains the government web site 1113 # does not seem to believe in bookmarks. To see the news release, click the 1114 # following link and search for "Daylight Savings Time Change". Press the 1115 # "Daylight Savings Time Change" link; it will fire off a popup using 1116 # JavaScript. 1117 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1118 # ... 1119 # Nunavut 1120 # An amendment to the Interpretation Act was registered on February 19/2007.... 1121 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1122 1123 # From Paul Eggert (2006-04-25): 1124 # H. David Matthews and Mary Vincent's map 1125 # "It's about TIME", _Canadian Geographic_ (September-October 1998) 1126 # <http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp> 1127 # contains detailed boundaries for regions observing nonstandard 1128 # time and daylight saving time arrangements in Canada circa 1998. 1129 # 1130 # INMS, the Institute for National Measurement Standards in Ottawa, has 1131 # information about standard and daylight saving time zones in Canada. 1132 # <http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php> 1133 # (updated periodically). 1134 # Its unofficial information is often taken from Matthews and Vincent. 1135 1136 # From Paul Eggert (2006-06-27): 1137 # For now, assume all of DST-observing Canada will fall into line with the 1138 # new US DST rules, 1139 1140 # From Chris Walton (2011-12-01) 1141 # In the first of Tammy Hardwick's articles 1142 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1143 # she quotes the Friday November 1/1918 edition of the Creston Review. 1144 # The quote includes these two statements: 1145 # 'Sunday the CPR went back to the old system of time...' 1146 # '... The daylight saving scheme was dropped all over Canada at the same time,' 1147 # These statements refer to a transition from daylight time to standard time 1148 # that occurred nationally on Sunday October 27/1918. This transition was 1149 # also documented in the Saturday October 26/1918 edition of the Toronto Star. 1150 1151 # In light of that evidence, we alter the date from the earlier believed 1152 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1153 # than Thursday) in all Canadian rulesets. 1154 1155 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1156 Rule Canada 1918 only - Apr 14 2:00 1:00 D 1157 Rule Canada 1918 only - Oct 27 2:00 0 S 1158 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1159 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1160 Rule Canada 1945 only - Sep 30 2:00 0 S 1161 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1162 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1163 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1164 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1165 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1166 1167 1168 # Newfoundland and Labrador 1169 1170 # From Paul Eggert (2000-10-02): 1171 # Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1172 # but the only part of Labrador that follows the rules is the 1173 # southeast corner, including Port Hope Simpson and Mary's Harbour, 1174 # but excluding, say, Black Tickle. 1175 1176 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1177 Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1178 Rule StJohns 1917 only - Sep 17 2:00 0 S 1179 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1180 Rule StJohns 1919 only - May 5 23:00 1:00 D 1181 Rule StJohns 1919 only - Aug 12 23:00 0 S 1182 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1183 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1184 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1185 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1186 # Pottenger. 1187 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1188 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1189 # Whitman gives the following transitions: 1190 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1191 # but go with Shanks & Pottenger and assume they used Canadian rules. 1192 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1193 # Apr 30 - Sep 24; go with Shanks & Pottenger. 1194 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1195 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1196 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1197 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1198 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1199 # From Paul Eggert (2000-10-02): 1200 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1201 # at 00:01 local time. For now, assume it started in 1987. 1202 1203 # From Michael Pelley (2011-09-12): 1204 # We received today, Monday, September 12, 2011, notification that the 1205 # changes to the Newfoundland Standard Time Act have been proclaimed. 1206 # The change in the Act stipulates that the change from Daylight Savings 1207 # Time to Standard Time and from Standard Time to Daylight Savings Time 1208 # now occurs at 2:00AM. 1209 # ... 1210 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1211 # ... 1212 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1213 # Office of the Chief Information Officer 1214 # Executive Council 1215 # Government of Newfoundland & Labrador 1216 1217 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1218 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1219 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1220 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1221 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1222 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1223 # 1224 # St John's has an apostrophe, but Posix file names can't have apostrophes. 1225 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1226 Zone America/St_Johns -3:30:52 - LMT 1884 1227 -3:30:52 StJohns N%sT 1918 1228 -3:30:52 Canada N%sT 1919 1229 -3:30:52 StJohns N%sT 1935 Mar 30 1230 -3:30 StJohns N%sT 1942 May 11 1231 -3:30 Canada N%sT 1946 1232 -3:30 StJohns N%sT 2011 Nov 1233 -3:30 Canada N%sT 1234 1235 # most of east Labrador 1236 1237 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1238 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1239 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1240 -3:30:52 - NST 1918 1241 -3:30:52 Canada N%sT 1919 1242 -3:30:52 - NST 1935 Mar 30 1243 -3:30 - NST 1936 1244 -3:30 StJohns N%sT 1942 May 11 1245 -3:30 Canada N%sT 1946 1246 -3:30 StJohns N%sT 1966 Mar 15 2:00 1247 -4:00 StJohns A%sT 2011 Nov 1248 -4:00 Canada A%sT 1249 1250 1251 # west Labrador, Nova Scotia, Prince Edward I 1252 1253 # From Paul Eggert (2006-03-22): 1254 # Shanks & Pottenger write that since 1970 most of this region has been like 1255 # Halifax. Many locales did not observe peacetime DST until 1972; 1256 # Glace Bay, NS is the largest that we know of. 1257 # Shanks & Pottenger also write that Liverpool, NS was the only town 1258 # in Canada to observe DST in 1971 but not 1970; for now we'll assume 1259 # this is a typo. 1260 1261 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1262 Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1263 Rule Halifax 1916 only - Oct 1 0:00 0 S 1264 Rule Halifax 1920 only - May 9 0:00 1:00 D 1265 Rule Halifax 1920 only - Aug 29 0:00 0 S 1266 Rule Halifax 1921 only - May 6 0:00 1:00 D 1267 Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1268 Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1269 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1270 Rule Halifax 1923 only - Sep 4 0:00 0 S 1271 Rule Halifax 1924 only - Sep 15 0:00 0 S 1272 Rule Halifax 1925 only - Sep 28 0:00 0 S 1273 Rule Halifax 1926 only - May 16 0:00 1:00 D 1274 Rule Halifax 1926 only - Sep 13 0:00 0 S 1275 Rule Halifax 1927 only - May 1 0:00 1:00 D 1276 Rule Halifax 1927 only - Sep 26 0:00 0 S 1277 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1278 Rule Halifax 1928 only - Sep 9 0:00 0 S 1279 Rule Halifax 1929 only - Sep 3 0:00 0 S 1280 Rule Halifax 1930 only - Sep 15 0:00 0 S 1281 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1282 Rule Halifax 1932 only - May 1 0:00 1:00 D 1283 Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1284 Rule Halifax 1933 only - Oct 2 0:00 0 S 1285 Rule Halifax 1934 only - May 20 0:00 1:00 D 1286 Rule Halifax 1934 only - Sep 16 0:00 0 S 1287 Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1288 Rule Halifax 1935 only - Sep 30 0:00 0 S 1289 Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1290 Rule Halifax 1936 only - Sep 14 0:00 0 S 1291 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1292 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1293 Rule Halifax 1939 only - May 28 0:00 1:00 D 1294 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1295 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1296 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1297 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1298 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1299 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1300 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1301 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1302 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1303 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1304 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1305 -4:00 Halifax A%sT 1918 1306 -4:00 Canada A%sT 1919 1307 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1308 -4:00 Canada A%sT 1946 1309 -4:00 Halifax A%sT 1974 1310 -4:00 Canada A%sT 1311 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1312 -4:00 Canada A%sT 1953 1313 -4:00 Halifax A%sT 1954 1314 -4:00 - AST 1972 1315 -4:00 Halifax A%sT 1974 1316 -4:00 Canada A%sT 1317 1318 # New Brunswick 1319 1320 # From Paul Eggert (2007-01-31): 1321 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1322 # says they changed at 00:01 through 2006, and 1323 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1324 # clear that this was the case since at least 1993. 1325 # For now, assume it started in 1993. 1326 1327 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1328 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1329 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1330 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1331 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1332 Rule Moncton 1939 only - May 27 1:00 1:00 D 1333 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1334 Rule Moncton 1940 only - May 19 1:00 1:00 D 1335 Rule Moncton 1941 only - May 4 1:00 1:00 D 1336 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1337 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1338 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1339 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1340 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1341 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1342 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1343 -5:00 - EST 1902 Jun 15 1344 -4:00 Canada A%sT 1933 1345 -4:00 Moncton A%sT 1942 1346 -4:00 Canada A%sT 1946 1347 -4:00 Moncton A%sT 1973 1348 -4:00 Canada A%sT 1993 1349 -4:00 Moncton A%sT 2007 1350 -4:00 Canada A%sT 1351 1352 # Quebec 1353 1354 # From Paul Eggert (2013-08-30): 1355 # Since 1970 most of Quebec has been like Toronto. 1356 # However, because earlier versions of the tz database mistakenly relied on data 1357 # from Shanks & Pottenger saying that Quebec differed from Ontario after 1970, 1358 # a separate entry was created for most of Quebec. We're loath to lose 1359 # its pre-1970 info, even though the tz database is normally limited to 1360 # zones that differ after 1970, so keep this otherwise out-of-scope entry. 1361 1362 # Matthews and Vincent (1998) also write that Quebec east of the -63 1363 # meridian is supposed to observe AST, but residents as far east as 1364 # Natashquan use EST/EDT, and residents east of Natashquan use AST. 1365 # The Quebec department of justice writes in 1366 # "The situation in Minganie and Basse-Côte-Nord" 1367 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1368 # that the coastal strip from just east of Natashquan to Blanc-Sablon 1369 # observes Atlantic standard time all year round. 1370 # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1371 # says this common practice was codified into law as of 2007. 1372 # For lack of better info, guess this practice began around 1970, contra to 1373 # Shanks & Pottenger who have this region observing AST/ADT. 1374 1375 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1376 Rule Mont 1917 only - Mar 25 2:00 1:00 D 1377 Rule Mont 1917 only - Apr 24 0:00 0 S 1378 Rule Mont 1919 only - Mar 31 2:30 1:00 D 1379 Rule Mont 1919 only - Oct 25 2:30 0 S 1380 Rule Mont 1920 only - May 2 2:30 1:00 D 1381 Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1382 Rule Mont 1921 only - May 1 2:00 1:00 D 1383 Rule Mont 1922 only - Apr 30 2:00 1:00 D 1384 Rule Mont 1924 only - May 17 2:00 1:00 D 1385 Rule Mont 1924 1926 - Sep lastSun 2:30 0 S 1386 Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1387 # The 1927-to-1937 rules can be expressed more simply as 1388 # Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1389 # Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1390 # The rules below avoid use of 24:00 1391 # (which pre-1998 versions of zic cannot handle). 1392 Rule Mont 1927 only - May 1 0:00 1:00 D 1393 Rule Mont 1927 1932 - Sep lastSun 0:00 0 S 1394 Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1395 Rule Mont 1932 only - May 1 0:00 1:00 D 1396 Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1397 Rule Mont 1933 only - Oct 1 0:00 0 S 1398 Rule Mont 1934 1939 - Sep lastSun 0:00 0 S 1399 Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1400 Rule Mont 1945 1948 - Sep lastSun 2:00 0 S 1401 Rule Mont 1949 1950 - Oct lastSun 2:00 0 S 1402 Rule Mont 1951 1956 - Sep lastSun 2:00 0 S 1403 Rule Mont 1957 1973 - Oct lastSun 2:00 0 S 1404 1405 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1406 Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1407 -4:00 Canada A%sT 1970 1408 -4:00 - AST 1409 Zone America/Montreal -4:54:16 - LMT 1884 1410 -5:00 Mont E%sT 1918 1411 -5:00 Canada E%sT 1919 1412 -5:00 Mont E%sT 1942 Feb 9 2:00s 1413 -5:00 Canada E%sT 1946 1414 -5:00 Mont E%sT 1974 1415 -5:00 Canada E%sT 1416 1417 # Ontario 1418 1419 # From Paul Eggert (2006-07-09): 1420 # Shanks & Pottenger write that since 1970 most of Ontario has been like 1421 # Toronto. 1422 # Thunder Bay skipped DST in 1973. 1423 # Many smaller locales did not observe peacetime DST until 1974; 1424 # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1425 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1426 1427 # From Mark Brader (2003-07-26): 1428 # [According to the Toronto Star] Orillia, Ontario, adopted DST 1429 # effective Saturday, 1912-06-22, 22:00; the article mentions that 1430 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1431 # have already done so. In Orillia DST was to run until Saturday, 1432 # 1912-08-31 (no time mentioned), but it was met with considerable 1433 # hostility from certain segments of the public, and was revoked after 1434 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1435 # presumably that should be -07-06. (1912-06-19, -07-12; also letters 1436 # earlier in June). 1437 # 1438 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1439 1440 # From Paul Eggert (1997-10-17): 1441 # Mark Brader writes that an article in the 1997-10-14 Toronto Star 1442 # says that Atikokan, Ontario currently does not observe DST, 1443 # but will vote on 11-10 whether to use EST/EDT. 1444 # He also writes that the Ontario Time Act (1990, Chapter T.9) 1445 # <http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html> 1446 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1447 # Officially Atikokan is therefore on CST/CDT, and most likely this report 1448 # concerns a non-official time observed as a matter of local practice. 1449 # 1450 # From Paul Eggert (2000-10-02): 1451 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1452 # New Osnaburgh observe CST all year, that Big Trout Lake observes 1453 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1454 # violation of the official Ontario rules. 1455 # 1456 # From Paul Eggert (2006-07-09): 1457 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1458 # 2005-07-21 Chronicle-Journal, which said: 1459 # 1460 # The clocks in Atikokan stay set on standard time year-round. 1461 # This means they spend about half the time on central time and 1462 # the other half on eastern time. 1463 # 1464 # For the most part, the system works, Mayor Dennis Brown said. 1465 # 1466 # "The majority of businesses in Atikokan deal more with Eastern 1467 # Canada, but there are some that deal with Western Canada," he 1468 # said. "I don't see any changes happening here." 1469 # 1470 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1471 # [New Osnaburgh] follow the same practice." 1472 1473 # From Garry McKinnon (2006-07-14) via Chris Walton: 1474 # I chatted with a member of my board who has an outstanding memory 1475 # and a long history in Atikokan (and in the telecom industry) and he 1476 # can say for certain that Atikokan has been practicing the current 1477 # time keeping since 1952, at least. 1478 1479 # From Paul Eggert (2006-07-17): 1480 # Shanks & Pottenger say that Atikokan has agreed with Rainy River 1481 # ever since standard time was introduced, but the information from 1482 # McKinnon sounds more authoritative. For now, assume that Atikokan 1483 # switched to EST immediately after WWII era daylight saving time 1484 # ended. This matches the old (less-populous) America/Coral_Harbour 1485 # entry since our cutoff date of 1970, so we can move 1486 # America/Coral_Harbour to the 'backward' file. 1487 1488 # From Mark Brader (2010-03-06): 1489 # 1490 # Currently the database has: 1491 # 1492 # # Ontario 1493 # 1494 # # From Paul Eggert (2006-07-09): 1495 # # Shanks & Pottenger write that since 1970 most of Ontario has been like 1496 # # Toronto. 1497 # # Thunder Bay skipped DST in 1973. 1498 # # Many smaller locales did not observe peacetime DST until 1974; 1499 # # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1500 # 1501 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1502 # right corner of page 1, it says that Toronto will return to standard 1503 # time at 2 am Sunday morning (which agrees with the database), and that: 1504 # 1505 # The one-hour setback will go into effect throughout most of Ontario, 1506 # except in areas like Windsor which remains on standard time all year. 1507 # 1508 # Windsor is, of course, a lot larger than Nipigon. 1509 # 1510 # I only came across this incidentally. I don't know if Windsor began 1511 # observing DST when Detroit did, or in 1974, or on some other date. 1512 # 1513 # By the way, the article continues by noting that: 1514 # 1515 # Some cities in the United States have pushed the deadline back 1516 # three weeks and will change over from daylight saving in October. 1517 1518 # From Arthur David Olson (2010-07-17): 1519 # 1520 # "Standard Time and Time Zones in Canada" appeared in 1521 # The Journal of The Royal Astronomical Society of Canada, 1522 # volume 26, number 2 (February 1932) and, as of 2010-07-17, 1523 # was available at 1524 # http://adsabs.harvard.edu/full/1932JRASC..26...49S 1525 # 1526 # It includes the text below (starting on page 57): 1527 # 1528 # A list of the places in Canada using daylight saving time would 1529 # require yearly revision. From information kindly furnished by 1530 # the provincial governments and by the postmasters in many cities 1531 # and towns, it is found that the following places used daylight sav- 1532 # ing in 1930. The information for the province of Quebec is definite, 1533 # for the other provinces only approximate: 1534 # 1535 # Province Daylight saving time used 1536 # Prince Edward Island Not used. 1537 # Nova Scotia In Halifax only. 1538 # New Brunswick In St. John only. 1539 # Quebec In the following places: 1540 # Montreal Lachine 1541 # Quebec Mont-Royal 1542 # Lévis Iberville 1543 # St. Lambert Cap de la Madelèine 1544 # Verdun Loretteville 1545 # Westmount Richmond 1546 # Outremont St. Jérôme 1547 # Longueuil Greenfield Park 1548 # Arvida Waterloo 1549 # Chambly-Canton Beaulieu 1550 # Melbourne La Tuque 1551 # St. Théophile Buckingham 1552 # Ontario Used generally in the cities and towns along 1553 # the southerly part of the province. Not 1554 # used in the northwesterly part. 1555 # Manitoba Not used. 1556 # Saskatchewan In Regina only. 1557 # Alberta Not used. 1558 # British Columbia Not used. 1559 # 1560 # With some exceptions, the use of daylight saving may be said to be limited 1561 # to those cities and towns lying between Quebec city and Windsor, Ont. 1562 1563 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1564 Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1565 Rule Toronto 1919 only - Oct 26 0:00 0 S 1566 Rule Toronto 1920 only - May 2 2:00 1:00 D 1567 Rule Toronto 1920 only - Sep 26 0:00 0 S 1568 Rule Toronto 1921 only - May 15 2:00 1:00 D 1569 Rule Toronto 1921 only - Sep 15 2:00 0 S 1570 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1571 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1572 # was meant. 1573 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1574 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1575 # The 1927-to-1939 rules can be expressed more simply as 1576 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1577 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1578 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1579 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1580 # The rules below avoid use of Sun>=25 1581 # (which pre-2004 versions of zic cannot handle). 1582 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1583 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1584 Rule Toronto 1932 only - May 1 2:00 1:00 D 1585 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1586 Rule Toronto 1933 only - Oct 1 2:00 0 S 1587 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1588 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1589 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1590 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1591 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1592 Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1593 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1594 Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1595 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1596 # Shanks & Pottenger say Toronto ended DST a week early in 1971, 1597 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1598 # is wrong, and that he had confirmed it by checking the 1971-10-30 1599 # Toronto Star, which said that DST was ending 1971-10-31 as usual. 1600 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1601 1602 # From Paul Eggert (2003-07-27): 1603 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1604 # Port Arthur, Ontario, the principle of the Bill has been in 1605 # operation for the past three years, and in the City of Moose Jaw, 1606 # Saskatchewan, for one year." 1607 1608 # From David Bryan via Tory Tronrud, Director/Curator, 1609 # Thunder Bay Museum (2003-11-12): 1610 # There is some suggestion, however, that, by-law or not, daylight 1611 # savings time was being practiced in Fort William and Port Arthur 1612 # before 1909.... [I]n 1910, the line between the Eastern and Central 1613 # Time Zones was permanently moved about two hundred miles west to 1614 # include the Thunder Bay area.... When Canada adopted daylight 1615 # savings time in 1916, Fort William and Port Arthur, having done so 1616 # already, did not change their clocks.... During the Second World 1617 # War,... [t]he cities agreed to implement DST during the summer 1618 # months for the remainder of the war years. 1619 1620 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1621 Zone America/Toronto -5:17:32 - LMT 1895 1622 -5:00 Canada E%sT 1919 1623 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1624 -5:00 Canada E%sT 1946 1625 -5:00 Toronto E%sT 1974 1626 -5:00 Canada E%sT 1627 Zone America/Thunder_Bay -5:57:00 - LMT 1895 1628 -6:00 - CST 1910 1629 -5:00 - EST 1942 1630 -5:00 Canada E%sT 1970 1631 -5:00 Toronto E%sT 1973 1632 -5:00 - EST 1974 1633 -5:00 Canada E%sT 1634 Zone America/Nipigon -5:53:04 - LMT 1895 1635 -5:00 Canada E%sT 1940 Sep 29 1636 -5:00 1:00 EDT 1942 Feb 9 2:00s 1637 -5:00 Canada E%sT 1638 Zone America/Rainy_River -6:18:16 - LMT 1895 1639 -6:00 Canada C%sT 1940 Sep 29 1640 -6:00 1:00 CDT 1942 Feb 9 2:00s 1641 -6:00 Canada C%sT 1642 Zone America/Atikokan -6:06:28 - LMT 1895 1643 -6:00 Canada C%sT 1940 Sep 29 1644 -6:00 1:00 CDT 1942 Feb 9 2:00s 1645 -6:00 Canada C%sT 1945 Sep 30 2:00 1646 -5:00 - EST 1647 1648 1649 # Manitoba 1650 1651 # From Rob Douglas (2006-04-06): 1652 # the old Manitoba Time Act - as amended by Bill 2, assented to 1653 # March 27, 1987 ... said ... 1654 # "between two o'clock Central Standard Time in the morning of 1655 # the first Sunday of April of each year and two o'clock Central 1656 # Standard Time in the morning of the last Sunday of October next 1657 # following, one hour in advance of Central Standard Time."... 1658 # I believe that the English legislation [of the old time act] had 1659 # been assented to (March 22, 1967).... 1660 # Also, as far as I can tell, there was no order-in-council varying 1661 # the time of Daylight Saving Time for 2005 and so the provisions of 1662 # the 1987 version would apply - the changeover was at 2:00 Central 1663 # Standard Time (i.e. not until 3:00 Central Daylight Time). 1664 1665 # From Paul Eggert (2006-04-10): 1666 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1667 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1668 # it was also 02:00s in 1966. 1669 1670 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1671 Rule Winn 1916 only - Apr 23 0:00 1:00 D 1672 Rule Winn 1916 only - Sep 17 0:00 0 S 1673 Rule Winn 1918 only - Apr 14 2:00 1:00 D 1674 Rule Winn 1918 only - Oct 27 2:00 0 S 1675 Rule Winn 1937 only - May 16 2:00 1:00 D 1676 Rule Winn 1937 only - Sep 26 2:00 0 S 1677 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1678 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1679 Rule Winn 1945 only - Sep lastSun 2:00 0 S 1680 Rule Winn 1946 only - May 12 2:00 1:00 D 1681 Rule Winn 1946 only - Oct 13 2:00 0 S 1682 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1683 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1684 Rule Winn 1950 only - May 1 2:00 1:00 D 1685 Rule Winn 1950 only - Sep 30 2:00 0 S 1686 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1687 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1688 Rule Winn 1959 only - Oct lastSun 2:00 0 S 1689 Rule Winn 1960 only - Sep lastSun 2:00 0 S 1690 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1691 Rule Winn 1963 only - Sep 22 2:00 0 S 1692 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1693 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1694 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1695 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1696 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1697 -6:00 Winn C%sT 2006 1698 -6:00 Canada C%sT 1699 1700 1701 # Saskatchewan 1702 1703 # From Mark Brader (2003-07-26): 1704 # The first actual adoption of DST in Canada was at the municipal 1705 # level. As the [Toronto] Star put it (1912-06-07), "While people 1706 # elsewhere have long been talking of legislation to save daylight, 1707 # the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1708 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1709 # presumably late evening, as below), and would run until "the end of 1710 # the summer". The discrepancy between municipal time and railroad 1711 # time was noted. 1712 1713 # From Paul Eggert (2003-07-27): 1714 # Willett (1914-03) notes that DST "has been in operation ... in the 1715 # City of Moose Jaw, Saskatchewan, for one year." 1716 1717 # From Paul Eggert (2006-03-22): 1718 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1719 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1720 # Other western towns (e.g. Lloydminster) are like Edmonton. 1721 # Matthews and Vincent (1998) write that Denare Beach and Creighton 1722 # are like Winnipeg, in violation of Saskatchewan law. 1723 1724 # From W. Jones (1992-11-06): 1725 # The. . .below is based on information I got from our law library, the 1726 # provincial archives, and the provincial Community Services department. 1727 # A precise history would require digging through newspaper archives, and 1728 # since you didn't say what you wanted, I didn't bother. 1729 # 1730 # Saskatchewan is split by a time zone meridian (105W) and over the years 1731 # the boundary became pretty ragged as communities near it reevaluated 1732 # their affiliations in one direction or the other. In 1965 a provincial 1733 # referendum favoured legislating common time practices. 1734 # 1735 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1736 # Saskatchewan 1978) was proclaimed, and established that the eastern 1737 # part of Saskatchewan would use CST year round, that districts in 1738 # northwest Saskatchewan would by default follow CST but could opt to 1739 # follow Mountain Time rules (thus 1 hour difference in the winter and 1740 # zero in the summer), and that districts in southwest Saskatchewan would 1741 # by default follow MT but could opt to follow CST. 1742 # 1743 # It took a few years for the dust to settle (I know one story of a town 1744 # on one time zone having its school in another, such that a mom had to 1745 # serve her family lunch in two shifts), but presently it seems that only 1746 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1747 # rules any more; all other districts appear to have used CST year round 1748 # since sometime in the 1960s. 1749 1750 # From Chris Walton (2006-06-26): 1751 # The Saskatchewan time act which was last updated in 1996 is about 30 pages 1752 # long and rather painful to read. 1753 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1754 1755 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1756 Rule Regina 1918 only - Apr 14 2:00 1:00 D 1757 Rule Regina 1918 only - Oct 27 2:00 0 S 1758 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1759 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1760 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1761 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1762 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1763 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1764 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1765 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1766 Rule Regina 1945 only - Sep lastSun 2:00 0 S 1767 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1768 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1769 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1770 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1771 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1772 Rule Regina 1959 only - Oct lastSun 2:00 0 S 1773 # 1774 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1775 Rule Swift 1957 only - Oct lastSun 2:00 0 S 1776 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1777 Rule Swift 1959 only - Oct lastSun 2:00 0 S 1778 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1779 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1780 Zone America/Regina -6:58:36 - LMT 1905 Sep 1781 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1782 -6:00 - CST 1783 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1784 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1785 -7:00 Regina M%sT 1950 1786 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1787 -6:00 - CST 1788 1789 1790 # Alberta 1791 1792 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1793 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1794 Rule Edm 1918 only - Oct 27 2:00 0 S 1795 Rule Edm 1919 only - May 27 2:00 0 S 1796 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1797 Rule Edm 1920 only - Oct lastSun 2:00 0 S 1798 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1799 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1800 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1801 Rule Edm 1945 only - Sep lastSun 2:00 0 S 1802 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1803 Rule Edm 1947 only - Sep lastSun 2:00 0 S 1804 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1805 Rule Edm 1967 only - Oct lastSun 2:00 0 S 1806 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1807 Rule Edm 1969 only - Oct lastSun 2:00 0 S 1808 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1809 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1810 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1811 Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1812 -7:00 Edm M%sT 1987 1813 -7:00 Canada M%sT 1814 1815 1816 # British Columbia 1817 1818 # From Paul Eggert (2006-03-22): 1819 # Shanks & Pottenger write that since 1970 most of this region has 1820 # been like Vancouver. 1821 # Dawson Creek uses MST. Much of east BC is like Edmonton. 1822 # Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1823 1824 # It seems though that (re: Creston) is not entirely correct: 1825 1826 # From Chris Walton (2011-12-01): 1827 # There are two areas within the Canadian province of British Columbia 1828 # that do not currently observe daylight saving: 1829 # a) The Creston Valley (includes the town of Creston and surrounding area) 1830 # b) The eastern half of the Peace River Regional District 1831 # (includes the cities of Dawson Creek and Fort St. John) 1832 1833 # Earlier this year I stumbled across a detailed article about the time 1834 # keeping history of Creston; it was written by Tammy Hardwick who is the 1835 # manager of the Creston & District Museum. The article was written in May 2009. 1836 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1837 # According to the article, Creston has not changed its clocks since June 1918. 1838 # i.e. Creston has been stuck on UTC-7 for 93 years. 1839 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1840 1841 # Unfortunately the exact date for the time change in June 1918 remains 1842 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1843 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1844 # as plausible as any other date (in June). She also said that after writing the 1845 # article she had discovered another time change in 1916; this is the subject 1846 # of another article which she wrote in October 2010. 1847 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1848 1849 # Here is a summary of the three clock change events in Creston's history: 1850 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1851 # Exact date unknown 1852 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1853 # Exact date in October unknown; Sunday October 1 is a reasonable guess. 1854 # 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1855 # Exact date in June unknown; Sunday June 2 is a reasonable guess. 1856 # note#1: 1857 # On Oct 27/1918 when daylight saving ended in the rest of Canada, 1858 # Creston did not change its clocks. 1859 # note#2: 1860 # During WWII when the Federal Government legislated a mandatory clock change, 1861 # Creston did not oblige. 1862 # note#3: 1863 # There is no guarantee that Creston will remain on Mountain Standard Time 1864 # (UTC-7) forever. 1865 # The subject was debated at least once this year by the town Council. 1866 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1867 1868 # During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1869 # In Creston, that was handled by shifting the area to PST (-8:00) then applying 1870 # summer time to cause the offset to be -7:00, the same as it had been before 1871 # the change. It can be argued that the timezone abbreviation during this 1872 # period should be PDT rather than MST, but that doesn't seem important enough 1873 # (to anyone) to further complicate the rules. 1874 1875 # The transition dates (and times) are guesses. 1876 1877 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1878 Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1879 Rule Vanc 1918 only - Oct 27 2:00 0 S 1880 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1881 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1882 Rule Vanc 1945 only - Sep 30 2:00 0 S 1883 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1884 Rule Vanc 1946 only - Oct 13 2:00 0 S 1885 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1886 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1887 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1888 Zone America/Vancouver -8:12:28 - LMT 1884 1889 -8:00 Vanc P%sT 1987 1890 -8:00 Canada P%sT 1891 Zone America/Dawson_Creek -8:00:56 - LMT 1884 1892 -8:00 Canada P%sT 1947 1893 -8:00 Vanc P%sT 1972 Aug 30 2:00 1894 -7:00 - MST 1895 Zone America/Creston -7:46:04 - LMT 1884 1896 -7:00 - MST 1916 Oct 1 1897 -8:00 - PST 1918 Jun 2 1898 -7:00 - MST 1899 1900 # Northwest Territories, Nunavut, Yukon 1901 1902 # From Paul Eggert (2006-03-22): 1903 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1904 # Mathew Englander (1996-10-07) gives the following refs: 1905 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1906 # c. 7 defines Yukon standard time as UTC-9. This is still valid; 1907 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1908 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1909 # * O.I.C. 1980/02 established DST. 1910 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1911 # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1912 # with Englander. 1913 # From Chris Walton (2006-06-26): 1914 # Here is a link to the old daylight saving portion of the interpretation 1915 # act which was last updated in 1987: 1916 # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 1917 1918 # From Rives McDow (1999-09-04): 1919 # Nunavut ... moved ... to incorporate the whole territory into one time zone. 1920 # Nunavut moves to single time zone Oct. 31 1921 # <http://www.nunatsiaq.com/nunavut/nvt90903_13.html> 1922 # 1923 # From Antoine Leca (1999-09-06): 1924 # We then need to create a new timezone for the Kitikmeot region of Nunavut 1925 # to differentiate it from the Yellowknife region. 1926 1927 # From Paul Eggert (1999-09-20): 1928 # Basic Facts: The New Territory 1929 # <http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html> 1930 # (1999) reports that Pangnirtung operates on eastern time, 1931 # and that Coral Harbour does not observe DST. We don't know when 1932 # Pangnirtung switched to eastern time; we'll guess 1995. 1933 1934 # From Rives McDow (1999-11-08): 1935 # On October 31, when the rest of Nunavut went to Central time, 1936 # Pangnirtung wobbled. Here is the result of their wobble: 1937 # 1938 # The following businesses and organizations in Pangnirtung use Central Time: 1939 # 1940 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 1941 # Eastern Arctic National Parks, A & D Specialist 1942 # 1943 # The following businesses and organizations in Pangnirtung use Eastern Time: 1944 # 1945 # Hamlet office, All other businesses, Both schools, Airport operator 1946 # 1947 # This has made for an interesting situation there, which warranted the news. 1948 # No one there that I spoke with seems concerned, or has plans to 1949 # change the local methods of keeping time, as it evidently does not 1950 # really interfere with any activities or make things difficult locally. 1951 # They plan to celebrate New Year's turn-over twice, one hour apart, 1952 # so it appears that the situation will last at least that long. 1953 # The Nunavut Intergovernmental Affairs hopes that they will "come to 1954 # their senses", but the locals evidently don't see any problem with 1955 # the current state of affairs. 1956 1957 # From Michaela Rodrigue, writing in the 1958 # Nunatsiaq News (1999-11-19) 1959 # <http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html>: 1960 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 1961 # central - or Nunavut time - for government offices, and eastern time 1962 # for municipal offices and schools.... Igloolik [was similar but then] 1963 # made the switch to central time on Saturday, Nov. 6. 1964 1965 # From Paul Eggert (2000-10-02): 1966 # Matthews and Vincent (1998) say the following, but we lack histories 1967 # for these potential new Zones. 1968 # 1969 # The Canadian Forces station at Alert uses Eastern Time while the 1970 # handful of residents at the Eureka weather station [in the Central 1971 # zone] skip daylight savings. Baffin Island, which is crossed by the 1972 # Central, Eastern and Atlantic Time zones only uses Eastern Time. 1973 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 1974 # Central Time and Southampton Island [in the Central zone] is not 1975 # required to use daylight savings. 1976 1977 # From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 1978 # Nunavut now has two time zones (2000-11-10): 1979 # The Nunavut government would allow its employees in Kugluktuk and 1980 # Cambridge Bay to operate on central time year-round, putting them 1981 # one hour behind the rest of Nunavut for six months during the winter. 1982 # At the end of October the two communities had rebelled against 1983 # Nunavut's unified time zone, refusing to shift to eastern time with 1984 # the rest of the territory for the winter. Cambridge Bay remained on 1985 # central time, while Kugluktuk, even farther west, reverted to 1986 # mountain time, which they had used before the advent of Nunavut's 1987 # unified time zone in 1999. 1988 # 1989 # From Rives McDow (2001-01-20), quoting the Nunavut government: 1990 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 1991 1992 # From Paul Eggert (2000-12-04): 1993 # Let's just keep track of the official times for now. 1994 1995 # From Rives McDow (2001-03-07): 1996 # The premier of Nunavut has issued a ministerial statement advising 1997 # that effective 2001-04-01, the territory of Nunavut will revert 1998 # back to three time zones (mountain, central, and eastern). Of the 1999 # cities in Nunavut, Coral Harbor is the only one that I know of that 2000 # has said it will not observe dst, staying on EST year round. I'm 2001 # checking for more info, and will get back to you if I come up with 2002 # more. 2003 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 2004 2005 # From Gwillim Law (2005-05-21): 2006 # According to maps at 2007 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 2008 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 2009 # (both dated 2003), and 2010 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2011 # (from a 1998 Canadian Geographic article), the de facto and de jure time 2012 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2013 # round. Using Google, it's easy to find other websites that confirm this. 2014 # I wasn't able to find how far back this time regimen goes, but since it 2015 # predates the creation of Nunavut, it probably goes back many years.... 2016 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2017 # 2018 # From Paul Eggert (2005-07-26): 2019 # For lack of better information, assume that Southampton Island observed 2020 # daylight saving only during wartime. 2021 2022 # From Chris Walton (2007-03-01): 2023 # ... the community of Resolute (located on Cornwallis Island in 2024 # Nunavut) moved from Central Time to Eastern Time last November. 2025 # Basically the community did not change its clocks at the end of 2026 # daylight saving.... 2027 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2028 2029 # From Chris Walton (2011-03-21): 2030 # Back in 2007 I initiated the creation of a new "zone file" for Resolute 2031 # Bay. Resolute Bay is a small community located about 900km north of 2032 # the Arctic Circle. The zone file was required because Resolute Bay had 2033 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2034 # 2035 # According to new information which I received last week, Resolute Bay 2036 # went back to using UTC-6 in the winter of 2007-2008... 2037 # 2038 # On March 11/2007 most of Canada went onto daylight saving. On March 2039 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2040 # talked to somebody that was both knowledgeable and helpful. I was able 2041 # to confirm that Resolute Bay was still operating on UTC-5. It was 2042 # explained to me that Resolute Bay had been on the Eastern Time zone 2043 # (EST) in the winter, and was now back on the Central Time zone (CDT). 2044 # i.e. the time zone had changed twice in the last year but the clocks 2045 # had not moved. The residents had to know which time zone they were in 2046 # so they could follow the correct TV schedule... 2047 # 2048 # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2049 # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2050 # of the phone call, I decided to seek out an alternate source of 2051 # information. I found an e-mail address for somebody by the name of 2052 # Stephanie Adams whose job was listed as "Inns North Support Officer for 2053 # Arctic Co-operatives." I was under the impression that Stephanie lived 2054 # and worked in Resolute Bay... 2055 # 2056 # On March 14/2011 I phoned the hamlet office again. I was told that 2057 # Resolute Bay had been using Central Standard Time over the winter of 2058 # 2010-2011 and that the clocks had therefore been moved one hour ahead 2059 # on March 13/2011. The person I talked to was aware that Resolute Bay 2060 # had previously experimented with Eastern Standard Time but he could not 2061 # tell me when the practice had stopped. 2062 # 2063 # On March 17/2011 I searched the Web to find an e-mail address of 2064 # somebody that might be able to tell me exactly when Resolute Bay went 2065 # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2066 # used to be the mayor of Resolute Bay and he apparently owns half the 2067 # businesses including "South Camp Inn." This website has some info on 2068 # Aziz: 2069 # http://www.uphere.ca/node/493 2070 # 2071 # I sent Aziz an e-mail asking when Resolute Bay had stopped using 2072 # Eastern Standard Time. 2073 # 2074 # Aziz responded quickly with this: "hi, The time was not changed for the 2075 # 1 year only, the following year, the community went back to the old way 2076 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2077 # the winter Zulu plus 6 hrs" 2078 # 2079 # This of course conflicted with everything I had ascertained in November 2008. 2080 # 2081 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2082 # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2083 # may want to check with the weather office in Resolute Bay or do a 2084 # search on the weather through Env. Canada. web site" 2085 # 2086 # If I had realized the Stephanie did not live in Resolute Bay I would 2087 # never have contacted her. I now believe that all the information I 2088 # obtained in November 2008 should be ignored... 2089 # I apologize for reporting incorrect information in 2008. 2090 2091 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2092 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2093 Rule NT_YK 1918 only - Oct 27 2:00 0 S 2094 Rule NT_YK 1919 only - May 25 2:00 1:00 D 2095 Rule NT_YK 1919 only - Nov 1 0:00 0 S 2096 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2097 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2098 Rule NT_YK 1945 only - Sep 30 2:00 0 S 2099 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2100 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2101 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2102 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2103 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2104 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2105 # aka Panniqtuuq 2106 Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 2107 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2108 -5:00 Canada E%sT 1999 Oct 31 2:00 2109 -6:00 Canada C%sT 2000 Oct 29 2:00 2110 -5:00 Canada E%sT 2111 # formerly Frobisher Bay 2112 Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 2113 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2114 -6:00 Canada C%sT 2000 Oct 29 2:00 2115 -5:00 Canada E%sT 2116 # aka Qausuittuq 2117 Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 2118 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2119 -5:00 - EST 2001 Apr 1 3:00 2120 -6:00 Canada C%sT 2006 Oct 29 2:00 2121 -5:00 - EST 2007 Mar 11 3:00 2122 -6:00 Canada C%sT 2123 # aka Kangiqiniq 2124 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2125 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2126 -5:00 - EST 2001 Apr 1 3:00 2127 -6:00 Canada C%sT 2128 # aka Iqaluktuuttiaq 2129 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 2130 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2131 -6:00 Canada C%sT 2000 Oct 29 2:00 2132 -5:00 - EST 2000 Nov 5 0:00 2133 -6:00 - CST 2001 Apr 1 3:00 2134 -7:00 Canada M%sT 2135 Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2136 -7:00 NT_YK M%sT 1980 2137 -7:00 Canada M%sT 2138 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 2139 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2140 -7:00 NT_YK M%sT 1980 2141 -7:00 Canada M%sT 2142 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2143 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 2144 -8:00 NT_YK P%sT 1980 2145 -8:00 Canada P%sT 2146 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2147 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2148 -8:00 NT_YK P%sT 1980 2149 -8:00 Canada P%sT 2150 2151 2152 ############################################################################### 2153 2154 # Mexico 2155 2156 # From Paul Eggert (2001-03-05): 2157 # The Investigation and Analysis Service of the 2158 # Mexican Library of Congress (MLoC) has published a 2159 # history of Mexican local time (in Spanish) 2160 # <http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/>. 2161 # 2162 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2163 # (In all cases we go with the MLoC.) 2164 # S&P report that Baja was at -8:00 in 1922/1923. 2165 # S&P say the 1930 transition in Baja was 1930-11-16. 2166 # S&P report no DST during summer 1931. 2167 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2168 2169 # From Gwillim Law (2001-02-20): 2170 # There are some other discrepancies between the Decrees page and the 2171 # tz database. I think they can best be explained by supposing that 2172 # the researchers who prepared the Decrees page failed to find some of 2173 # the relevant documents. 2174 2175 # From Alan Perry (1996-02-15): 2176 # A guy from our Mexico subsidiary finally found the Presidential Decree 2177 # outlining the timezone changes in Mexico. 2178 # 2179 # ------------- Begin Forwarded Message ------------- 2180 # 2181 # I finally got my hands on the Official Presidential Decree that sets up the 2182 # rules for the DST changes. The rules are: 2183 # 2184 # 1. The country is divided in 3 timezones: 2185 # - Baja California Norte (the Mexico/BajaNorte TZ) 2186 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2187 # - The rest of the country (the Mexico/General TZ) 2188 # 2189 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2190 # at 2:00 AM, the times in each zone are as follows: 2191 # BajaNorte: GMT+7 2192 # BajaSur: GMT+6 2193 # General: GMT+5 2194 # 2195 # 3. The rest of the year, the times are as follows: 2196 # BajaNorte: GMT+8 2197 # BajaSur: GMT+7 2198 # General: GMT+6 2199 # 2200 # The Decree was published in Mexico's Official Newspaper on January 4th. 2201 # 2202 # -------------- End Forwarded Message -------------- 2203 # From Paul Eggert (1996-06-12): 2204 # For an English translation of the decree, see 2205 # "Diario Oficial: Time Zone Changeover" (1996-01-04) 2206 # <http://mexico-travel.com/extra/timezone_eng.html>. 2207 2208 # From Rives McDow (1998-10-08): 2209 # The State of Quintana Roo has reverted back to central STD and DST times 2210 # (i.e. UTC -0600 and -0500 as of 1998-08-02). 2211 2212 # From Rives McDow (2000-01-10): 2213 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2214 # zone 5 hours from the International Date Line, and will not observe daylight 2215 # savings time so as to stay on the same time zone as the southern part of 2216 # Arizona year round. 2217 2218 # From Jesper Nørgaard, translating 2219 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2220 # In Oaxaca, the 55.000 teachers from the Section 22 of the National 2221 # Syndicate of Education Workers, refuse to apply daylight saving each 2222 # year, so that the more than 10,000 schools work at normal hour the 2223 # whole year. 2224 2225 # From Gwillim Law (2001-01-19): 2226 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2227 # (translated):... 2228 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2229 # that Summer Time will be reduced from seven to five months, starting 2230 # this year.... 2231 # <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 2232 # [translated], says "summer time will ... take effect on the first Sunday 2233 # in May, and end on the last Sunday of September. 2234 2235 # From Arthur David Olson (2001-01-25): 2236 # The 2001-01-24 traditional Washington Post contained the page one 2237 # story "Timely Issue Divides Mexicans."... 2238 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2239 # ... Mexico City Mayor López Obrador "...is threatening to keep 2240 # Mexico City and its 20 million residents on a different time than 2241 # the rest of the country..." In particular, López Obrador would abolish 2242 # observation of Daylight Saving Time. 2243 2244 # Official statute published by the Energy Department 2245 # <http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre> 2246 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2247 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). 2248 2249 # From Paul Eggert (2001-03-03): 2250 # 2251 # <http://www.latimes.com/news/nation/20010303/t000018766.html> 2252 # James F. Smith writes in today's LA Times 2253 # * Sonora will continue to observe standard time. 2254 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that 2255 # the Federal District will not adopt DST. 2256 # * 4 of 16 district leaders announced they'll ignore the decree. 2257 # * The decree does not affect federal-controlled facilities including 2258 # the airport, banks, hospitals, and schools. 2259 # 2260 # For now we'll assume that the Federal District will bow to federal rules. 2261 2262 # From Jesper Nørgaard (2001-04-01): 2263 # I found some references to the Mexican application of daylight 2264 # saving, which modifies what I had already sent you, stating earlier 2265 # that a number of northern Mexican states would go on daylight 2266 # saving. The modification reverts this to only cover Baja California 2267 # (Norte), while all other states (except Sonora, who has no daylight 2268 # saving all year) will follow the original decree of president 2269 # Vicente Fox, starting daylight saving May 6, 2001 and ending 2270 # September 30, 2001. 2271 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 2272 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2273 2274 # From Reuters (2001-09-04): 2275 # Mexico's Supreme Court on Tuesday declared that daylight savings was 2276 # unconstitutional in Mexico City, creating the possibility the 2277 # capital will be in a different time zone from the rest of the nation 2278 # next year.... The Supreme Court's ruling takes effect at 2:00 2279 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2280 # standard time. "This is so residents of the Federal District are not 2281 # subject to unexpected time changes," a statement from the court said. 2282 2283 # From Jesper Nørgaard Welen (2002-03-12): 2284 # ... consulting my local grocery store(!) and my coworkers, they all insisted 2285 # that a new decision had been made to reinstate US style DST in Mexico.... 2286 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2287 # confirms this. Sonora as usual is the only state where DST is not applied. 2288 2289 # From Steffen Thorsen (2009-12-28): 2290 # 2291 # Steffen Thorsen wrote: 2292 # > Mexico's House of Representatives has approved a proposal for northern 2293 # > Mexico's border cities to share the same daylight saving schedule as 2294 # > the United States. 2295 # Now this has passed both the Congress and the Senate, so starting from 2296 # 2010, some border regions will be the same: 2297 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2298 # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2299 # (Spanish) 2300 # 2301 # Could not find the new law text, but the proposed law text changes are here: 2302 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2303 # (Gaceta Parlamentaria) 2304 # 2305 # There is also a list of the votes here: 2306 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2307 # 2308 # Our page: 2309 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2310 2311 # From Arthur David Olson (2010-01-20): 2312 # The page 2313 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2314 # includes this text: 2315 # En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2316 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2317 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2318 # Tamaulipas, la aplicación de este horario estacional surtirá efecto 2319 # desde las dos horas del segundo domingo de marzo y concluirá a las dos 2320 # horas del primer domingo de noviembre. 2321 # En los municipios fronterizos que se encuentren ubicados en la franja 2322 # fronteriza norte en el territorio comprendido entre la línea 2323 # internacional y la línea paralela ubicada a una distancia de veinte 2324 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2325 # interior del país, la aplicación de este horario estacional surtirá 2326 # efecto desde las dos horas del segundo domingo de marzo y concluirá a 2327 # las dos horas del primer domingo de noviembre. 2328 2329 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2330 Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2331 Rule Mexico 1939 only - Jun 25 0:00 0 S 2332 Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2333 Rule Mexico 1941 only - Apr 1 0:00 0 S 2334 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2335 Rule Mexico 1944 only - May 1 0:00 0 S 2336 Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2337 Rule Mexico 1950 only - Jul 30 0:00 0 S 2338 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2339 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2340 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2341 Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2342 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2343 Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2344 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2345 # Quintana Roo; represented by Cancún 2346 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2347 -6:00 - CST 1981 Dec 23 2348 -5:00 Mexico E%sT 1998 Aug 2 2:00 2349 -6:00 Mexico C%sT 2350 # Campeche, Yucatán; represented by Mérida 2351 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2352 -6:00 - CST 1981 Dec 23 2353 -5:00 - EST 1982 Dec 2 2354 -6:00 Mexico C%sT 2355 # Coahuila, Durango, Nuevo León, Tamaulipas (near US border) 2356 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2357 -6:00 - CST 1988 2358 -6:00 US C%sT 1989 2359 -6:00 Mexico C%sT 2010 2360 -6:00 US C%sT 2361 # Coahuila, Durango, Nuevo León, Tamaulipas (away from US border) 2362 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2363 -6:00 - CST 1988 2364 -6:00 US C%sT 1989 2365 -6:00 Mexico C%sT 2366 # Central Mexico 2367 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 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 Mexico C%sT 2001 Sep 30 02:00 2374 -6:00 - CST 2002 Feb 20 2375 -6:00 Mexico C%sT 2376 # Chihuahua (near US border) 2377 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2378 -7:00 - MST 1927 Jun 10 23:00 2379 -6:00 - CST 1930 Nov 15 2380 -7:00 - MST 1931 May 1 23:00 2381 -6:00 - CST 1931 Oct 2382 -7:00 - MST 1932 Apr 1 2383 -6:00 - CST 1996 2384 -6:00 Mexico C%sT 1998 2385 -6:00 - CST 1998 Apr Sun>=1 3:00 2386 -7:00 Mexico M%sT 2010 2387 -7:00 US M%sT 2388 # Chihuahua (away from US border) 2389 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2390 -7:00 - MST 1927 Jun 10 23:00 2391 -6:00 - CST 1930 Nov 15 2392 -7:00 - MST 1931 May 1 23:00 2393 -6:00 - CST 1931 Oct 2394 -7:00 - MST 1932 Apr 1 2395 -6:00 - CST 1996 2396 -6:00 Mexico C%sT 1998 2397 -6:00 - CST 1998 Apr Sun>=1 3:00 2398 -7:00 Mexico M%sT 2399 # Sonora 2400 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2401 -7:00 - MST 1927 Jun 10 23:00 2402 -6:00 - CST 1930 Nov 15 2403 -7:00 - MST 1931 May 1 23:00 2404 -6:00 - CST 1931 Oct 2405 -7:00 - MST 1932 Apr 1 2406 -6:00 - CST 1942 Apr 24 2407 -7:00 - MST 1949 Jan 14 2408 -8:00 - PST 1970 2409 -7:00 Mexico M%sT 1999 2410 -7:00 - MST 2411 2412 # From Alexander Krivenyshev (2010-04-21): 2413 # According to news, Bahía de Banderas (Mexican state of Nayarit) 2414 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2415 # share the same time zone as nearby city Puerto Vallarta, Jalisco). 2416 # 2417 # (Spanish) 2418 # Bahía de Banderas homologa su horario al del centro del 2419 # país, a partir de este domingo 2420 # http://www.nayarit.gob.mx/notes.asp?id=20748 2421 # 2422 # Bahía de Banderas homologa su horario con el del Centro del 2423 # País 2424 # 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 2425 # 2426 # (English) 2427 # Puerto Vallarta and Bahía de Banderas: One Time Zone 2428 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2429 # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2430 # 2431 # "Mexico's Senate approved the amendments to the Mexican Schedule System that 2432 # will allow Bahía de Banderas and Puerto Vallarta to share the same time 2433 # zone ..." 2434 # Baja California Sur, Nayarit, Sinaloa 2435 2436 # From Arthur David Olson (2010-05-01): 2437 # Use "Bahia_Banderas" to keep the name to fourteen characters. 2438 2439 # Mazatlán 2440 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2441 -7:00 - MST 1927 Jun 10 23:00 2442 -6:00 - CST 1930 Nov 15 2443 -7:00 - MST 1931 May 1 23:00 2444 -6:00 - CST 1931 Oct 2445 -7:00 - MST 1932 Apr 1 2446 -6:00 - CST 1942 Apr 24 2447 -7:00 - MST 1949 Jan 14 2448 -8:00 - PST 1970 2449 -7:00 Mexico M%sT 2450 2451 # Bahía de Banderas 2452 Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2453 -7:00 - MST 1927 Jun 10 23:00 2454 -6:00 - CST 1930 Nov 15 2455 -7:00 - MST 1931 May 1 23:00 2456 -6:00 - CST 1931 Oct 2457 -7:00 - MST 1932 Apr 1 2458 -6:00 - CST 1942 Apr 24 2459 -7:00 - MST 1949 Jan 14 2460 -8:00 - PST 1970 2461 -7:00 Mexico M%sT 2010 Apr 4 2:00 2462 -6:00 Mexico C%sT 2463 2464 # Baja California (near US border) 2465 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2466 -7:00 - MST 1924 2467 -8:00 - PST 1927 Jun 10 23:00 2468 -7:00 - MST 1930 Nov 15 2469 -8:00 - PST 1931 Apr 1 2470 -8:00 1:00 PDT 1931 Sep 30 2471 -8:00 - PST 1942 Apr 24 2472 -8:00 1:00 PWT 1945 Aug 14 23:00u 2473 -8:00 1:00 PPT 1945 Nov 12 # Peace 2474 -8:00 - PST 1948 Apr 5 2475 -8:00 1:00 PDT 1949 Jan 14 2476 -8:00 - PST 1954 2477 -8:00 CA P%sT 1961 2478 -8:00 - PST 1976 2479 -8:00 US P%sT 1996 2480 -8:00 Mexico P%sT 2001 2481 -8:00 US P%sT 2002 Feb 20 2482 -8:00 Mexico P%sT 2010 2483 -8:00 US P%sT 2484 # Baja California (away from US border) 2485 Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2486 -7:00 - MST 1924 2487 -8:00 - PST 1927 Jun 10 23:00 2488 -7:00 - MST 1930 Nov 15 2489 -8:00 - PST 1931 Apr 1 2490 -8:00 1:00 PDT 1931 Sep 30 2491 -8:00 - PST 1942 Apr 24 2492 -8:00 1:00 PWT 1945 Aug 14 23:00u 2493 -8:00 1:00 PPT 1945 Nov 12 # Peace 2494 -8:00 - PST 1948 Apr 5 2495 -8:00 1:00 PDT 1949 Jan 14 2496 -8:00 - PST 1954 2497 -8:00 CA P%sT 1961 2498 -8:00 - PST 1976 2499 -8:00 US P%sT 1996 2500 -8:00 Mexico P%sT 2001 2501 -8:00 US P%sT 2002 Feb 20 2502 -8:00 Mexico P%sT 2503 # From Paul Eggert (2006-03-22): 2504 # Formerly there was an America/Ensenada zone, which differed from 2505 # America/Tijuana only in that it did not observe DST from 1976 2506 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2507 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2508 # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2509 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2510 # DST-observance was a town-by-town matter back then. This concerns 2511 # data after 1970 so most likely there should be at least one Zone 2512 # other than America/Tijuana for Baja, but it's not clear yet what its 2513 # name or contents should be. 2514 # 2515 # Revillagigedo Is 2516 # no information 2517 2518 ############################################################################### 2519 2520 # Anguilla 2521 # See America/Port_of_Spain. 2522 2523 # Antigua and Barbuda 2524 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2525 Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 2526 -5:00 - EST 1951 2527 -4:00 - AST 2528 2529 # Bahamas 2530 # 2531 # For 1899 Milne gives -5:09:29.5; round that. 2532 # 2533 # From Sue Williams (2006-12-07): 2534 # The Bahamas announced about a month ago that they plan to change their DST 2535 # rules to sync with the U.S. starting in 2007.... 2536 # http://www.jonesbahamas.com/?c=45&a=10412 2537 2538 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2539 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2540 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2541 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2542 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 2543 -5:00 Bahamas E%sT 1976 2544 -5:00 US E%sT 2545 2546 # Barbados 2547 2548 # For 1899 Milne gives -3:58:29.2; round that. 2549 2550 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2551 Rule Barb 1977 only - Jun 12 2:00 1:00 D 2552 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2553 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2554 Rule Barb 1979 only - Sep 30 2:00 0 S 2555 Rule Barb 1980 only - Sep 25 2:00 0 S 2556 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2557 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2558 -3:58:29 - BMT 1932 # Bridgetown Mean Time 2559 -4:00 Barb A%sT 2560 2561 # Belize 2562 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2563 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2564 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2565 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2566 Rule Belize 1973 only - Dec 5 0:00 1:00 D 2567 Rule Belize 1974 only - Feb 9 0:00 0 S 2568 Rule Belize 1982 only - Dec 18 0:00 1:00 D 2569 Rule Belize 1983 only - Feb 12 0:00 0 S 2570 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2571 Zone America/Belize -5:52:48 - LMT 1912 Apr 2572 -6:00 Belize C%sT 2573 2574 # Bermuda 2575 2576 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2577 # Bermuda dockyard, Ireland I; round that. 2578 2579 # From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2580 2581 # Next year, however, clocks in the US will go forward on the second Sunday 2582 # in March, until the first Sunday in November. And, after the Time Zone 2583 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2584 # Friday, the same thing will happen in Bermuda. 2585 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2586 2587 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2588 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2589 -4:00 - AST 1974 Apr 28 2:00 2590 -4:00 Canada A%sT 1976 2591 -4:00 US A%sT 2592 2593 # Cayman Is 2594 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2595 Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2596 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 2597 -5:00 - EST 2598 2599 # Costa Rica 2600 2601 # Milne gives -5:36:13.3 as San José mean time; round to nearest. 2602 2603 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2604 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2605 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2606 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2607 # IATA SSIM (1991-09) says the following was at 1:00; 2608 # go with Shanks & Pottenger. 2609 Rule CR 1991 only - Jul 1 0:00 0 S 2610 Rule CR 1992 only - Mar 15 0:00 0 S 2611 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'. 2612 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2613 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José 2614 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time 2615 -6:00 CR C%sT 2616 # Coco 2617 # no information; probably like America/Costa_Rica 2618 2619 # Cuba 2620 2621 # From Paul Eggert (2013-02-21): 2622 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2623 # for the port, and -5:30 for meteorological observations. 2624 # For now, stick with Shanks & Pottenger. 2625 2626 # From Arthur David Olson (1999-03-29): 2627 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2628 # the Cuban National Team and the Baltimore Orioles was carried live on 2629 # the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2630 # During the game, play-by-play announcer Jim Hunter noted that 2631 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2632 # Time today." (The "two hour" remark referred to losing one hour of 2633 # sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2634 # to DST - and one more hour on 1999-04-04 - when the announcers will have 2635 # returned to Baltimore, which switches on that date.) 2636 2637 # From Steffen Thorsen (2013-11-11): 2638 # DST start in Cuba in 2004 ... does not follow the same rules as the 2639 # years before. The correct date should be Sunday 2004-03-28 00:00 ... 2640 # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2641 2642 # From Evert van der Veer via Steffen Thorsen (2004-10-28): 2643 # Cuba is not going back to standard time this year. 2644 # From Paul Eggert (2006-03-22): 2645 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2646 # says that it's due to a problem at the Antonio Guiteras 2647 # thermoelectric plant, and says "This October there will be no return 2648 # to normal hours (after daylight saving time)". 2649 # For now, let's assume that it's a temporary measure. 2650 2651 # From Carlos A. Carnero Delgado (2005-11-12): 2652 # This year (just like in 2004-2005) there's no change in time zone 2653 # adjustment in Cuba. We will stay in daylight saving time: 2654 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2655 2656 # From Jesper Nørgaard Welen (2006-10-21): 2657 # An article in GRANMA INTERNACIONAL claims that Cuba will end 2658 # the 3 years of permanent DST next weekend, see 2659 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2660 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2661 # watches should be set back one hour - going back to 00:00 hours - returning 2662 # to the normal schedule.... 2663 2664 # From Paul Eggert (2007-03-02): 2665 # <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2666 # says Cuban clocks will advance at midnight on March 10. 2667 # For lack of better information, assume Cuba will use US rules, 2668 # except that it switches at midnight standard time as usual. 2669 # 2670 # From Steffen Thorsen (2007-10-25): 2671 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2672 # earlier - on the last Sunday of October, just like in 2006. 2673 # 2674 # He supplied these references: 2675 # 2676 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2677 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2678 # 2679 # From Alex Krivenyshev (2007-10-25): 2680 # Here is also article from Granma (Cuba): 2681 # 2682 # Regirá el Horario Normal desde el próximo domingo 28 de octubre 2683 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2684 # 2685 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2686 2687 # From Arthur David Olson (2008-03-09): 2688 # I'm in Maryland which is now observing United States Eastern Daylight 2689 # Time. At 9:44 local time I used RealPlayer to listen to 2690 # http://media.enet.cu/radioreloj 2691 # a Cuban information station, and heard 2692 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2693 # indicating that Cuba is still on standard time. 2694 2695 # From Steffen Thorsen (2008-03-12): 2696 # It seems that Cuba will start DST on Sunday, 2007-03-16... 2697 # It was announced yesterday, according to this source (in Spanish): 2698 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2699 # 2700 # Some more background information is posted here: 2701 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2702 # 2703 # The article also says that Cuba has been observing DST since 1963, 2704 # while Shanks (and tzdata) has 1965 as the first date (except in the 2705 # 1940's). Many other web pages in Cuba also claim that it has been 2706 # observed since 1963, but with the exception of 1970 - an exception 2707 # which is not present in tzdata/Shanks. So there is a chance we need to 2708 # change some historic records as well. 2709 # 2710 # One example: 2711 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2712 2713 # From Jesper Nørgaard Welen (2008-03-13): 2714 # The Cuban time change has just been confirmed on the most authoritative 2715 # web site, the Granma. Please check out 2716 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2717 # 2718 # Basically as expected after Steffen Thorsen's information, the change 2719 # will take place midnight between Saturday and Sunday. 2720 2721 # From Arthur David Olson (2008-03-12): 2722 # Assume Sun>=15 (third Sunday) going forward. 2723 2724 # From Alexander Krivenyshev (2009-03-04) 2725 # According to the Radio Reloj - Cuba will start Daylight Saving Time on 2726 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2727 # not on midnight March 14 / March 15 as previously thought. 2728 # 2729 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2730 # (in Spanish) 2731 2732 # From Arthur David Olson (2009-03-09) 2733 # I listened over the Internet to 2734 # http://media.enet.cu/readioreloj 2735 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2736 # the time was announced as "diez cinco" - the same time as here, indicating 2737 # that has indeed switched to DST. Assume second Sunday from 2009 forward. 2738 2739 # From Steffen Thorsen (2011-03-08): 2740 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2741 # this year. Nothing about the end date known so far (if that has 2742 # changed at all). 2743 # 2744 # Source: 2745 # http://granma.co.cu/2011/03/08/nacional/artic01.html 2746 # 2747 # Our info: 2748 # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2749 # 2750 # From Steffen Thorsen (2011-10-30) 2751 # Cuba will end DST two weeks later this year. Instead of going back 2752 # tonight, it has been delayed to 2011-11-13 at 01:00. 2753 # 2754 # One source (Spanish) 2755 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2756 # 2757 # Our page: 2758 # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2759 # 2760 # From Steffen Thorsen (2012-03-01) 2761 # According to Radio Reloj, Cuba will start DST on Midnight between March 2762 # 31 and April 1. 2763 # 2764 # Radio Reloj has the following info (Spanish): 2765 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2766 # 2767 # Our info on it: 2768 # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2769 2770 # From Steffen Thorsen (2012-11-03): 2771 # Radio Reloj and many other sources report that Cuba is changing back 2772 # to standard time on 2012-11-04: 2773 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2774 # From Paul Eggert (2012-11-03): 2775 # For now, assume the future rule is first Sunday in November. 2776 2777 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2778 Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2779 Rule Cuba 1928 only - Oct 10 0:00 0 S 2780 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2781 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2782 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2783 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2784 Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2785 Rule Cuba 1965 only - Sep 30 0:00 0 S 2786 Rule Cuba 1966 only - May 29 0:00 1:00 D 2787 Rule Cuba 1966 only - Oct 2 0:00 0 S 2788 Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2789 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2790 Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2791 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2792 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2793 Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2794 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2795 Rule Cuba 1978 only - May 7 0:00 1:00 D 2796 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2797 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2798 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2799 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2800 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2801 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2802 Rule Cuba 1996 only - Oct 6 0:00s 0 S 2803 Rule Cuba 1997 only - Oct 12 0:00s 0 S 2804 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2805 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2806 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2807 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2808 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2809 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2810 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2811 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2812 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2813 Rule Cuba 2011 only - Nov 13 0:00s 0 S 2814 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 2815 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2816 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 2817 2818 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2819 Zone America/Havana -5:29:28 - LMT 1890 2820 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2821 -5:00 Cuba C%sT 2822 2823 # Dominica 2824 # See America/Port_of_Spain. 2825 2826 # Dominican Republic 2827 2828 # From Steffen Thorsen (2000-10-30): 2829 # Enrique Morales reported to me that the Dominican Republic has changed the 2830 # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2831 # http://www.listin.com.do/antes/261000/republica/princi.html 2832 2833 # From Paul Eggert (2000-12-04): 2834 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2835 2836 # From Rives McDow (2000-12-01): 2837 # Dominican Republic changed its mind and presidential decree on Tuesday, 2838 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2839 # Dominican Republic will be reverting to 8 hours from the International Date 2840 # Line, and will not be using DST in the foreseeable future. The reason they 2841 # decided to use DST was to be in synch with Puerto Rico, who was also going 2842 # to implement DST. When Puerto Rico didn't implement DST, the president 2843 # decided to revert. 2844 2845 2846 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2847 Rule DR 1966 only - Oct 30 0:00 1:00 D 2848 Rule DR 1967 only - Feb 28 0:00 0 S 2849 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2850 Rule DR 1970 only - Feb 21 0:00 0 S 2851 Rule DR 1971 only - Jan 20 0:00 0 S 2852 Rule DR 1972 1974 - Jan 21 0:00 0 S 2853 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2854 Zone America/Santo_Domingo -4:39:36 - LMT 1890 2855 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 2856 -5:00 DR E%sT 1974 Oct 27 2857 -4:00 - AST 2000 Oct 29 02:00 2858 -5:00 US E%sT 2000 Dec 3 01:00 2859 -4:00 - AST 2860 2861 # El Salvador 2862 2863 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2864 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 2865 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 2866 # There are too many San Salvadors elsewhere, so use America/El_Salvador 2867 # instead of America/San_Salvador. 2868 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2869 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 2870 -6:00 Salv C%sT 2871 2872 # Grenada 2873 # Guadeloupe 2874 # St Barthélemy 2875 # St Martin (French part) 2876 # See America/Port_of_Spain. 2877 2878 # Guatemala 2879 # 2880 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2881 # Diario Co Latino, at 2882 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 2883 # says in an article dated 2006-04-19 that the Guatemalan government had 2884 # decided on that date to advance official time by 60 minutes, to lessen the 2885 # impact of the elevated cost of oil.... Daylight saving time will last from 2886 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2887 # From Paul Eggert (2006-06-22): 2888 # The Ministry of Energy and Mines, press release CP-15/2006 2889 # (2006-04-19), says DST ends at 24:00. See 2890 # <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2891 2892 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2893 Rule Guat 1973 only - Nov 25 0:00 1:00 D 2894 Rule Guat 1974 only - Feb 24 0:00 0 S 2895 Rule Guat 1983 only - May 21 0:00 1:00 D 2896 Rule Guat 1983 only - Sep 22 0:00 0 S 2897 Rule Guat 1991 only - Mar 23 0:00 1:00 D 2898 Rule Guat 1991 only - Sep 7 0:00 0 S 2899 Rule Guat 2006 only - Apr 30 0:00 1:00 D 2900 Rule Guat 2006 only - Oct 1 0:00 0 S 2901 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2902 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 2903 -6:00 Guat C%sT 2904 2905 # Haiti 2906 # From Gwillim Law (2005-04-15): 2907 # Risto O. Nykänen wrote me that Haiti is now on DST. 2908 # I searched for confirmation, and I found a press release 2909 # on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2910 # <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 2911 # 2912 # "The Prime Minister's Communication Office notifies the public in general 2913 # and the press in particular that, following a decision of the Interior 2914 # Ministry and the Territorial Collectivities [I suppose that means the 2915 # provinces], Haiti will move to Eastern Daylight Time in the night from next 2916 # Saturday the 2nd to Sunday the 3rd. 2917 # 2918 # "Consequently, the Prime Minister's Communication Office wishes to inform 2919 # the population that the country's clocks will be set forward one hour 2920 # starting at midnight. This provision will hold until the last Saturday in 2921 # October 2005. 2922 # 2923 # "Port-au-Prince, March 31, 2005" 2924 # 2925 # From Steffen Thorsen (2006-04-04): 2926 # I have been informed by users that Haiti observes DST this year like 2927 # last year, so the current "only" rule for 2005 might be changed to a 2928 # "max" rule or to last until 2006. (Who knows if they will observe DST 2929 # next year or if they will extend their DST like US/Canada next year). 2930 # 2931 # I have found this article about it (in French): 2932 # http://www.haitipressnetwork.com/news.cfm?articleID=7612 2933 # 2934 # The reason seems to be an energy crisis. 2935 2936 # From Stephen Colebourne (2007-02-22): 2937 # Some IATA info: Haiti won't be having DST in 2007. 2938 2939 # From Steffen Thorsen (2012-03-11): 2940 # According to several news sources, Haiti will observe DST this year, 2941 # apparently using the same start and end date as USA/Canada. 2942 # So this means they have already changed their time. 2943 # 2944 # http://www.alterpresse.org/spip.php?article12510 2945 # http://radiovision2000haiti.net/home/?p=13253 2946 # 2947 # From Arthur David Olson (2012-03-11): 2948 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 2949 # 3:00 a.m. rather than the traditional Haitian jump at midnight. 2950 # Assume a US-style fall back as well. 2951 2952 # From Steffen Thorsen (2013-03-10): 2953 # It appears that Haiti is observing DST this year as well, same rules 2954 # as US/Canada. They did it last year as well, and it looks like they 2955 # are going to observe DST every year now... 2956 # 2957 # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 2958 # http://www.canalplushaiti.net/?p=6714 2959 2960 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2961 Rule Haiti 1983 only - May 8 0:00 1:00 D 2962 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 2963 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2964 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2965 # Go with IATA. 2966 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 2967 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2968 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 2969 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 2970 Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 2971 Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S 2972 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2973 Zone America/Port-au-Prince -4:49:20 - LMT 1890 2974 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 2975 -5:00 Haiti E%sT 2976 2977 # Honduras 2978 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2979 2980 # From Paul Eggert (2006-05-05): 2981 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2982 # saying Honduras will start using DST midnight Saturday, effective 4 2983 # months until September. La Tribuna reported today 2984 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2985 # of Honduras, refused to back down on this. 2986 2987 # From Jesper Nørgaard Welen (2006-08-08): 2988 # It seems that Honduras has returned from DST to standard time this Monday at 2989 # 00:00 hours (prolonging Sunday to 25 hours duration). 2990 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 2991 2992 # From Paul Eggert (2006-08-08): 2993 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 2994 # <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 2995 # It mentions executive decree 18-2006. 2996 2997 # From Steffen Thorsen (2006-08-17): 2998 # Honduras will observe DST from 2007 to 2009, exact dates are not 2999 # published, I have located this authoritative source: 3000 # http://www.presidencia.gob.hn/noticia.aspx?nId=47 3001 3002 # From Steffen Thorsen (2007-03-30): 3003 # http://www.laprensahn.com/pais_nota.php?id04962=7386 3004 # So it seems that Honduras will not enter DST this year.... 3005 3006 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3007 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3008 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 3009 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3010 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3011 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3012 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3013 -6:00 Hond C%sT 3014 # 3015 # Great Swan I ceded by US to Honduras in 1972 3016 3017 # Jamaica 3018 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3019 # unspecified official document, and says "This time is used throughout the 3020 # island". Go with Milne. Round to the nearest second as required by zic. 3021 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3022 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3023 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3024 -5:00 - EST 1974 Apr 28 2:00 3025 -5:00 US E%sT 1984 3026 -5:00 - EST 3027 3028 # Martinique 3029 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3030 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3031 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3032 -4:00 - AST 1980 Apr 6 3033 -4:00 1:00 ADT 1980 Sep 28 3034 -4:00 - AST 3035 3036 # Montserrat 3037 # See America/Port_of_Spain. 3038 3039 # Nicaragua 3040 # 3041 # This uses Shanks & Pottenger for times before 2005. 3042 # 3043 # From Steffen Thorsen (2005-04-12): 3044 # I've got reports from 8 different people that Nicaragua just started 3045 # DST on Sunday 2005-04-10, in order to save energy because of 3046 # expensive petroleum. The exact end date for DST is not yet 3047 # announced, only "September" but some sites also say "mid-September". 3048 # Some background information is available on the President's official site: 3049 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3050 # The Decree, no 23-2005 is available here: 3051 # 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 3052 # 3053 # From Paul Eggert (2005-05-01): 3054 # The decree doesn't say anything about daylight saving, but for now let's 3055 # assume that it is daylight saving.... 3056 # 3057 # From Gwillim Law (2005-04-21): 3058 # The Associated Press story on the time change, which can be found at 3059 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3060 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3061 # time that a change of clocks was applied to save energy was in the year 2000 3062 # during the Arnoldo Alemán administration."... 3063 # The northamerica file says that Nicaragua has been on UTC-6 continuously 3064 # since December 1998. I wasn't able to find any details of Nicaraguan time 3065 # changes in 2000. Perhaps a note could be added to the northamerica file, to 3066 # the effect that we have indirect evidence that DST was observed in 2000. 3067 # 3068 # From Jesper Nørgaard Welen (2005-11-02): 3069 # Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3070 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3071 # (2005-09-26) 3072 # 3073 # From Jesper Nørgaard Welen (2006-05-05): 3074 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3075 # (my informal translation) 3076 # By order of the president of the republic, Enrique Bolaños, Nicaragua 3077 # advanced by sixty minutes their official time, yesterday at 2 in the 3078 # morning, and will stay that way until 30th of September. 3079 # 3080 # From Jesper Nørgaard Welen (2006-09-30): 3081 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3082 # My informal translation runs: 3083 # The natural sun time is restored in all the national territory, in that the 3084 # time is returned one hour at 01:00 am of October 1 of 2006. 3085 # 3086 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3087 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3088 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3089 Rule Nic 2005 only - Apr 10 0:00 1:00 D 3090 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3091 Rule Nic 2006 only - Apr 30 2:00 1:00 D 3092 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3093 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3094 Zone America/Managua -5:45:08 - LMT 1890 3095 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3096 -6:00 - CST 1973 May 3097 -5:00 - EST 1975 Feb 16 3098 -6:00 Nic C%sT 1992 Jan 1 4:00 3099 -5:00 - EST 1992 Sep 24 3100 -6:00 - CST 1993 3101 -5:00 - EST 1997 3102 -6:00 Nic C%sT 3103 3104 # Panama 3105 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3106 Zone America/Panama -5:18:08 - LMT 1890 3107 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time 3108 -5:00 - EST 3109 3110 # Puerto Rico 3111 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3112 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3113 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3114 -4:00 - AST 1942 May 3 3115 -4:00 US A%sT 1946 3116 -4:00 - AST 3117 3118 # St Kitts-Nevis 3119 # St Lucia 3120 # See America/Port_of_Spain. 3121 3122 # St Pierre and Miquelon 3123 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3124 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3125 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3126 -4:00 - AST 1980 May 3127 -3:00 - PMST 1987 # Pierre & Miquelon Time 3128 -3:00 Canada PM%sT 3129 3130 # St Vincent and the Grenadines 3131 # See America/Port_of_Spain. 3132 3133 # Turks and Caicos 3134 # 3135 # From Chris Dunn in 3136 # <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 3137 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3138 # daylight saving dates for time changes have been adjusted to match 3139 # the recent U.S. change of dates. 3140 # 3141 # From Brian Inglis (2007-04-28): 3142 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3143 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3144 # rows before that there is an out of date entry for Oct: 3145 # "Eastern Standard Times Begins 2007 3146 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3147 # indicating that the normal ET rules are followed. 3148 # 3149 # From Paul Eggert (2006-05-01): 3150 # Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 3151 # says they switch at midnight. Go with Shanks & Pottenger. 3152 # 3153 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3154 Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D 3155 Rule TC 1979 2006 - Oct lastSun 2:00 0 S 3156 Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 3157 Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D 3158 Rule TC 2007 max - Nov Sun>=1 2:00 0 S 3159 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3160 Zone America/Grand_Turk -4:44:32 - LMT 1890 3161 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3162 -5:00 TC E%sT 3163 3164 # British Virgin Is 3165 # Virgin Is 3166 # See America/Port_of_Spain. 3167 3168 3169 # Local Variables: 3170 # coding: utf-8 3171 # End: