1 # This file is in the public domain, so clarified as of
2 # 2009-05-17 by Arthur David Olson.
4 # This file is by no means authoritative; if you think you know better,
5 # go ahead and edit the file (and please send any changes to
6 # tz@iana.org for general use in the future). For more, please see
7 # the file CONTRIBUTING in the tz distribution.
9 # From Paul Eggert (2015-08-08):
11 # Unless otherwise specified, the source for data through 1990 is:
12 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
13 # San Diego: ACS Publications, Inc. (2003).
14 # Unfortunately this book contains many errors and cites no sources.
16 # Gwillim Law writes that a good source
17 # for recent time zone data is the International Air Transport
18 # Association's Standard Schedules Information Manual (IATA SSIM),
19 # published semiannually. Law sent in several helpful summaries
20 # of the IATA's data after 1990. Except where otherwise noted,
21 # IATA SSIM is the source for entries after 1990.
23 # Another source occasionally used is Edward W. Whitman, World Time Differences,
24 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
25 # I found in the UCLA library.
27 # For data circa 1899, a common source is:
28 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
29 # http://www.jstor.org/stable/1774359
31 # For Russian data circa 1919, a source is:
32 # Byalokoz EL. New Counting of Time in Russia since July 1, 1919.
33 # (See the 'europe' file for a fuller citation.)
35 # A reliable and entertaining source about time zones is
36 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
38 # I invented the abbreviations marked '*' in the following table;
39 # the rest are from earlier versions of this file, or from other sources.
40 # Corrections are welcome!
43 # 2:00 EET EEST Eastern European Time
45 # 3:00 AST ADT Arabia*
46 # 3:30 IRST IRDT Iran*
49 # 7:00 ICT Indochina, most times and locations*
50 # 7:00 WIB west Indonesia (Waktu Indonesia Barat)
51 # 8:00 WITA central Indonesia (Waktu Indonesia Tengah)
53 # 8:00 IDT Indochina, 1943-45, 1947-55, 1960-75 (some locations)*
54 # 8:00 JWST Western Standard Time (Japan, 1896/1937)*
55 # 8:30 KST KDT Korea when at +0830*
56 # 9:00 JCST Central Standard Time (Japan, 1896/1937)
57 # 9:00 WIT east Indonesia (Waktu Indonesia Timur)
59 # 9:00 KST KDT Korea when at +09
60 # 9:30 ACST Australian Central Standard Time
62 # See the 'europe' file for Russia and Turkey in Asia.
65 # Incorporates data for Singapore from Robert Elz' asia 1.1, as well as
66 # additional information from Tom Yap, Sun Microsystems Intercontinental
67 # Technical Support (including a page from the Official Airline Guide -
68 # Worldwide Edition). The names for time zones are guesses.
70 ###############################################################################
72 # These rules are stolen from the 'europe' file.
73 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
74 Rule EUAsia 1981 max - Mar lastSun 1:00u 1:00 S
75 Rule EUAsia 1979 1995 - Sep lastSun 1:00u 0 -
76 Rule EUAsia 1996 max - Oct lastSun 1:00u 0 -
77 Rule E-EurAsia 1981 max - Mar lastSun 0:00 1:00 S
78 Rule E-EurAsia 1979 1995 - Sep lastSun 0:00 0 -
79 Rule E-EurAsia 1996 max - Oct lastSun 0:00 0 -
80 Rule RussiaAsia 1981 1984 - Apr 1 0:00 1:00 S
81 Rule RussiaAsia 1981 1983 - Oct 1 0:00 0 -
82 Rule RussiaAsia 1984 1995 - Sep lastSun 2:00s 0 -
83 Rule RussiaAsia 1985 2011 - Mar lastSun 2:00s 1:00 S
84 Rule RussiaAsia 1996 2011 - Oct lastSun 2:00s 0 -
87 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
88 Zone Asia/Kabul 4:36:48 - LMT 1890
93 # From Paul Eggert (2006-03-22):
94 # Shanks & Pottenger have Yerevan switching to 3:00 (with Russian DST)
95 # in spring 1991, then to 4:00 with no DST in fall 1995, then
96 # readopting Russian DST in 1997. Go with Shanks & Pottenger, even
97 # when they disagree with others. Edgar Der-Danieliantz
98 # reported (1996-05-04) that Yerevan probably wouldn't use DST
99 # in 1996, though it did use DST in 1995. IATA SSIM (1991/1998) reports that
100 # Armenia switched from 3:00 to 4:00 in 1998 and observed DST after 1991,
101 # but started switching at 3:00s in 1998.
103 # From Arthur David Olson (2011-06-15):
104 # While Russia abandoned DST in 2011, Armenia may choose to
105 # follow Russia's "old" rules.
107 # From Alexander Krivenyshev (2012-02-10):
108 # According to News Armenia, on Feb 9, 2012,
109 # http://newsarmenia.ru/society/20120209/42609695.html
111 # The Armenia National Assembly adopted final reading of Amendments to the
112 # Law "On procedure of calculation time on the territory of the Republic of
113 # Armenia" according to which Armenia [is] abolishing Daylight Saving Time.
116 # http://www.worldtimezone.com/dst_news/dst_news_armenia03.html
117 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
118 Zone Asia/Yerevan 2:58:00 - LMT 1924 May 2
120 4:00 RussiaAsia +04/+05 1991 Mar 31 2:00s
121 3:00 RussiaAsia +03/+04 1995 Sep 24 2:00s
123 4:00 RussiaAsia +04/+05
127 # From Rustam Aliyev of the Azerbaijan Internet Forum (2005-10-23):
128 # According to the resolution of Cabinet of Ministers, 1997
129 # From Paul Eggert (2015-09-17): It was Resolution No. 21 (1997-03-17).
130 # http://code.az/files/daylight_res.pdf
132 # From Steffen Thorsen (2016-03-17):
133 # ... the Azerbaijani Cabinet of Ministers has cancelled switching to
134 # daylight saving time....
135 # http://www.azernews.az/azerbaijan/94137.html
136 # http://vestnikkavkaza.net/news/Azerbaijani-Cabinet-of-Ministers-cancels-daylight-saving-time.html
137 # http://en.apa.az/xeber_azerbaijan_abolishes_daylight_savings_ti_240862.html
139 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
140 Rule Azer 1997 2015 - Mar lastSun 4:00 1:00 S
141 Rule Azer 1997 2015 - Oct lastSun 5:00 0 -
142 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
143 Zone Asia/Baku 3:19:24 - LMT 1924 May 2
145 4:00 RussiaAsia +04/+05 1991 Mar 31 2:00s
146 3:00 RussiaAsia +03/+04 1992 Sep lastSun 2:00s
148 4:00 EUAsia +04/+05 1997
155 # From Alexander Krivenyshev (2009-05-13):
156 # According to newspaper Asian Tribune (May 6, 2009) Bangladesh may introduce
157 # Daylight Saving Time from June 16 to Sept 30
159 # Bangladesh to introduce daylight saving time likely from June 16
160 # http://www.asiantribune.com/?q=node/17288
161 # http://www.worldtimezone.com/dst_news/dst_news_bangladesh02.html
163 # "... Bangladesh government has decided to switch daylight saving time from
165 # 16 till September 30 in a bid to ensure maximum use of daylight to cope with
166 # crippling power crisis. "
168 # The switch will remain in effect from June 16 to Sept 30 (2009) but if
169 # implemented the next year, it will come in force from April 1, 2010
171 # From Steffen Thorsen (2009-06-02):
172 # They have finally decided now, but changed the start date to midnight between
173 # the 19th and 20th, and they have not set the end date yet.
176 # http://in.reuters.com/article/southAsiaNews/idINIndia-40017620090601
177 # http://bdnews24.com/details.php?id=85889&cid=2
180 # http://www.timeanddate.com/news/time/bangladesh-daylight-saving-2009.html
182 # From A. N. M. Kamrus Saadat (2009-06-15):
183 # Finally we've got the official mail regarding DST start time where DST start
184 # time is mentioned as Jun 19 2009, 23:00 from BTRC (Bangladesh
185 # Telecommunication Regulatory Commission).
187 # No DST end date has been announced yet.
189 # From Alexander Krivenyshev (2009-09-25):
190 # Bangladesh won't go back to Standard Time from October 1, 2009,
191 # instead it will continue DST measure till the cabinet makes a fresh decision.
193 # Following report by same newspaper-"The Daily Star Friday":
194 # "DST change awaits cabinet decision-Clock won't go back by 1-hr from Oct 1"
195 # http://www.thedailystar.net/newDesign/news-details.php?nid=107021
196 # http://www.worldtimezone.com/dst_news/dst_news_bangladesh04.html
198 # From Steffen Thorsen (2009-10-13):
199 # IANS (Indo-Asian News Service) now reports:
200 # Bangladesh has decided that the clock advanced by an hour to make
201 # maximum use of daylight hours as an energy saving measure would
202 # "continue for an indefinite period."
204 # One of many places where it is published:
205 # http://www.thaindian.com/newsportal/business/bangladesh-to-continue-indefinitely-with-advanced-time_100259987.html
207 # From Alexander Krivenyshev (2009-12-24):
208 # According to Bangladesh newspaper "The Daily Star,"
209 # Bangladesh will change its clock back to Standard Time on Dec 31, 2009.
211 # Clock goes back 1-hr on Dec 31 night.
212 # http://www.thedailystar.net/newDesign/news-details.php?nid=119228
213 # http://www.worldtimezone.com/dst_news/dst_news_bangladesh05.html
215 # "...The government yesterday decided to put the clock back by one hour
216 # on December 31 midnight and the new time will continue until March 31,
217 # 2010 midnight. The decision came at a cabinet meeting at the Prime
218 # Minister's Office last night..."
220 # From Alexander Krivenyshev (2010-03-22):
221 # According to Bangladesh newspaper "The Daily Star,"
222 # Cabinet cancels Daylight Saving Time
223 # http://www.thedailystar.net/newDesign/latest_news.php?nid=22817
224 # http://www.worldtimezone.com/dst_news/dst_news_bangladesh06.html
226 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
227 Rule Dhaka 2009 only - Jun 19 23:00 1:00 S
228 Rule Dhaka 2009 only - Dec 31 24:00 0 -
230 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
231 Zone Asia/Dhaka 6:01:40 - LMT 1890
232 5:53:20 - HMT 1941 Oct # Howrah Mean Time?
233 6:30 - BURT 1942 May 15 # Burma Time
235 6:30 - BURT 1951 Sep 30
236 6:00 - DACT 1971 Mar 26 # Dacca Time
241 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
242 Zone Asia/Thimphu 5:58:36 - LMT 1947 Aug 15 # or Thimbu
244 6:00 - BTT # Bhutan Time
246 # British Indian Ocean Territory
247 # Whitman and the 1995 CIA time zone map say 5:00, but the
248 # 1997 and later maps say 6:00. Assume the switch occurred in 1996.
249 # We have no information as to when standard time was introduced;
250 # assume it occurred in 1907, the same year as Mauritius (which
251 # then contained the Chagos Archipelago).
252 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
253 Zone Indian/Chagos 4:49:40 - LMT 1907
254 5:00 - IOT 1996 # BIOT Time
258 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
259 Zone Asia/Brunei 7:39:40 - LMT 1926 Mar # Bandar Seri Begawan
265 # Milne says 6:24:40 was the meridian of the time ball observatory at Rangoon.
267 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
268 Zone Asia/Yangon 6:24:40 - LMT 1880 # or Rangoon
269 6:24:40 - RMT 1920 # Rangoon Mean Time?
270 6:30 - BURT 1942 May # Burma Time
271 9:00 - JST 1945 May 3
272 6:30 - MMT # Myanmar Time
281 # People's Republic of China. Yes, they really have only one time zone.
283 # From Bob Devine (1988-01-28):
284 # No they don't. See TIME mag, 1986-02-17 p.52. Even though
285 # China is across 4 physical time zones, before Feb 1, 1986 only the
286 # Peking (Beijing) time zone was recognized. Since that date, China
287 # has two of 'em - Peking's and Ürümqi (named after the capital of
288 # the Xinjiang Uyghur Autonomous Region). I don't know about DST for it.
290 # . . .I just deleted the DST table and this editor makes it too
291 # painful to suck in another copy. So, here is what I have for
292 # DST start/end dates for Peking's time zone (info from AP):
294 # 1986 May 4 - Sept 14
295 # 1987 mid-April - ??
297 # From U. S. Naval Observatory (1989-01-19):
298 # CHINA 8 H AHEAD OF UTC ALL OF CHINA, INCL TAIWAN
299 # CHINA 9 H AHEAD OF UTC APR 17 - SEP 10
301 # From Paul Eggert (2008-02-11):
302 # Jim Mann, "A clumsy embrace for another western custom: China on daylight
303 # time - sort of", Los Angeles Times, 1986-05-05 ... [says] that China began
304 # observing daylight saving time in 1986.
306 # From Paul Eggert (2014-06-30):
307 # Shanks & Pottenger have China switching to a single time zone in 1980, but
308 # this doesn't seem to be correct. They also write that China observed summer
309 # DST from 1986 through 1991, which seems to match the above commentary, so
310 # go with them for DST rules as follows:
311 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
312 Rule Shang 1940 only - Jun 3 0:00 1:00 D
313 Rule Shang 1940 1941 - Oct 1 0:00 0 S
314 Rule Shang 1941 only - Mar 16 0:00 1:00 D
315 Rule PRC 1986 only - May 4 0:00 1:00 D
316 Rule PRC 1986 1991 - Sep Sun>=11 0:00 0 S
317 Rule PRC 1987 1991 - Apr Sun>=10 0:00 1:00 D
319 # From Anthony Fok (2001-12-20):
320 # BTW, I did some research on-line and found some info regarding these five
321 # historic timezones from some Taiwan websites. And yes, there are official
322 # Chinese names for these locales (before 1949).
324 # From Jesper Nørgaard Welen (2006-07-14):
325 # I have investigated the timezones around 1970 on the
326 # http://www.astro.com/atlas site [with provinces and county
327 # boundaries summarized below].... A few other exceptions were two
328 # counties on the Sichuan side of the Xizang-Sichuan border,
329 # counties Dege and Baiyu which lies on the Sichuan side and are
330 # therefore supposed to be GMT+7, Xizang region being GMT+6, but Dege
331 # county is GMT+8 according to astro.com while Baiyu county is GMT+6
332 # (could be true), for the moment I am assuming that those two
333 # counties are mistakes in the astro.com data.
335 # From Paul Eggert (2014-06-30):
336 # Alois Treindl kindly sent me translations of the following two sources:
339 # Guo Qingsheng (National Time-Service Center, CAS, Xi'an 710600, China)
340 # Beijing Time at the Beginning of the PRC
341 # China Historical Materials of Science and Technology
342 # (Zhongguo ke ji shi liao, 中国科技史料), Vol. 24, No. 1 (2003)
343 # It gives evidence that at the beginning of the PRC, Beijing time was
344 # officially apparent solar time! However, Guo also says that the
345 # evidence is dubious, as the relevant institute of astronomy had not
346 # been taken over by the PRC yet. It's plausible that apparent solar
347 # time was announced but never implemented, and that people continued
348 # to use UT+8. As the Shanghai radio station (and I presume the
349 # observatory) was still under control of French missionaries, it
350 # could well have ignored any such mandate.
353 # Guo Qing-sheng (Shaanxi Astronomical Observatory, CAS, Xi'an 710600, China)
354 # A Study on the Standard Time Changes for the Past 100 Years in China
355 # [undated and unknown publication location]
356 # It says several things:
357 # * The Qing dynasty used local apparent solar time throughout China.
358 # * The Republic of China instituted Beijing mean solar time effective
359 # the official calendar book of 1914.
360 # * The French Concession in Shanghai set up signal stations in
361 # French docks in the 1890s, controlled by Xujiahui (Zikawei)
362 # Observatory and set to local mean time.
363 # * "From the end of the 19th century" it changed to UT+8.
364 # * Chinese Customs (by then reduced to a tool of foreign powers)
365 # eventually standardized on this time for all ports, and it
366 # became used by railways as well.
367 # * In 1918 the Central Observatory proposed dividing China into
368 # five time zones (see below for details). This caught on
369 # at first only in coastal areas observing UT+8.
370 # * During WWII all of China was in theory was at UT+7. In practice
371 # this was ignored in the west, and I presume was ignored in
372 # Japanese-occupied territory.
373 # * Japanese-occupied Manchuria was at UT+9, i.e., Japan time.
374 # * The five-zone plan was resurrected after WWII and officially put into
375 # place (with some modifications) in March 1948. It's not clear
376 # how well it was observed in areas under Nationalist control.
377 # * The People's Liberation Army used UT+8 during the civil war.
379 # An AP article "Shanghai Internat'l Area Little Changed" in the
380 # Lewiston (ME) Daily Sun (1939-05-29), p 17, said "Even the time is
381 # different - the occupied districts going by Tokyo time, an hour
382 # ahead of that prevailing in the rest of Shanghai." Guess that the
383 # Xujiahui Observatory was under French control and stuck with UT +08.
385 # In earlier versions of this file, China had many separate Zone entries, but
386 # this was based on what were apparently incorrect data in Shanks & Pottenger.
387 # This has now been simplified to the two entries Asia/Shanghai and
388 # Asia/Urumqi, with the others being links for backward compatibility.
389 # Proposed in 1918 and theoretically in effect until 1949 (although in practice
390 # mainly observed in coastal areas), the five zones were:
392 # Changbai Time ("Long-white Time", Long-white = Heilongjiang area) UT +08:30
393 # Asia/Harbin (currently a link to Asia/Shanghai)
394 # Heilongjiang (except Mohe county), Jilin
396 # Zhongyuan Time ("Central plain Time") UT +08
399 # This currently represents most other zones as well,
400 # as apparently these regions have been the same since 1970.
401 # Milne gives 8:05:43.2 for Xujiahui Observatory time; round to nearest.
402 # Guo says Shanghai switched to UT +08 "from the end of the 19th century".
404 # Long-shu Time (probably due to Long and Shu being two names of the area) UT +07
405 # Asia/Chongqing (currently a link to Asia/Shanghai)
406 # Guangxi, Guizhou, Hainan, Ningxia, Sichuan, Shaanxi, and Yunnan;
407 # most of Gansu; west Inner Mongolia; west Qinghai; and the Guangdong
408 # counties Deqing, Enping, Kaiping, Luoding, Taishan, Xinxing,
409 # Yangchun, Yangjiang, Yu'nan, and Yunfu.
411 # Xin-zang Time ("Xinjiang-Tibet Time") UT +06
413 # This currently represents Kunlun Time as well,
414 # as apparently the two regions have been the same since 1970.
415 # The Gansu counties Aksay, Anxi, Dunhuang, Subei; west Qinghai;
416 # the Guangdong counties Xuwen, Haikang, Suixi, Lianjiang,
417 # Zhanjiang, Wuchuan, Huazhou, Gaozhou, Maoming, Dianbai, and Xinyi;
418 # east Tibet, including Lhasa, Chamdo, Shigaise, Jimsar, Shawan and Hutubi;
419 # east Xinjiang, including Ürümqi, Turpan, Karamay, Korla, Minfeng, Jinghe,
420 # Wusu, Qiemo, Xinyan, Wulanwusu, Jinghe, Yumin, Tacheng, Tuoli, Emin,
421 # Shihezi, Changji, Yanqi, Heshuo, Tuokexun, Tulufan, Shanshan, Hami,
422 # Fukang, Kuitun, Kumukuli, Miquan, Qitai, and Turfan.
424 # Kunlun Time UT +05:30
425 # Asia/Kashgar (currently a link to Asia/Urumqi)
426 # West Tibet, including Pulan, Aheqi, Shufu, Shule;
427 # West Xinjiang, including Aksu, Atushi, Yining, Hetian, Cele, Luopu, Nileke,
428 # Zhaosu, Tekesi, Gongliu, Chabuchaer, Huocheng, Bole, Pishan, Suiding,
431 # From Luther Ma (2009-10-17):
432 # Almost all (>99.9%) ethnic Chinese (properly ethnic Han) living in
433 # Xinjiang use Chinese Standard Time. Some are aware of Xinjiang time,
434 # but have no need of it. All planes, trains, and schools function on
435 # what is called "Beijing time." When Han make an appointment in Chinese
436 # they implicitly use Beijing time.
438 # On the other hand, ethnic Uyghurs, who make up about half the
439 # population of Xinjiang, typically use "Xinjiang time" which is two
440 # hours behind Beijing time, or UT +06. The government of the Xinjiang
441 # Uyghur Autonomous Region, (XAUR, or just Xinjiang for short) as well as
442 # local governments such as the Ürümqi city government use both times in
443 # publications, referring to what is popularly called Xinjiang time as
444 # "Ürümqi time." When Uyghurs make an appointment in the Uyghur language
445 # they almost invariably use Xinjiang time.
447 # (Their ethnic Han compatriots would typically have no clue of its
448 # widespread use, however, because so extremely few of them are fluent in
449 # Uyghur, comparable to the number of Anglo-Americans fluent in Navajo.)
451 # (...As with the rest of China there was a brief interval ending in 1990
452 # or 1991 when summer time was in use. The confusion was severe, with
453 # the province not having dual times but four times in use at the same
454 # time. Some areas remained on standard Xinjiang time or Beijing time and
455 # others moving their clocks ahead.)
457 # From Luther Ma (2009-11-19):
458 # With the risk of being redundant to previous answers these are the most common
459 # English "transliterations" (w/o using non-English symbols):
466 # 5. It seems that Uyghurs in Ürümqi has been using Xinjiang since at least the
467 # 1960's. I know of one Han, now over 50, who grew up in the surrounding
468 # countryside and used Xinjiang time as a child.
470 # 6. Likewise for Kashgar and the rest of south Xinjiang I don't know of any
471 # start date for Xinjiang time.
473 # Without having access to local historical records, nor the ability to legally
474 # publish them, I would go with October 1, 1949, when Xinjiang became the Uyghur
475 # Autonomous Region under the PRC. (Before that Uyghurs, of course, would also
476 # not be using Beijing time, but some local time.)
478 # From David Cochrane (2014-03-26):
479 # Just a confirmation that Ürümqi time was implemented in Ürümqi on 1 Feb 1986:
480 # http://content.time.com/time/magazine/article/0,9171,960684,00.html
482 # From Luther Ma (2014-04-22):
483 # I have interviewed numerous people of various nationalities and from
484 # different localities in Xinjiang and can confirm the information in Guo's
485 # report regarding Xinjiang, as well as the Time article reference by David
486 # Cochrane. Whether officially recognized or not (and both are officially
487 # recognized), two separate times have been in use in Xinjiang since at least
488 # the Cultural Revolution: Xinjiang Time (XJT), aka Ürümqi Time or local time;
489 # and Beijing Time. There is no confusion in Xinjiang as to which name refers
490 # to which time. Both are widely used in the province, although in some
491 # population groups might be use one to the exclusion of the other. The only
492 # problem is that computers and smart phones list Ürümqi (or Kashgar) as
493 # having the same time as Beijing.
495 # From Paul Eggert (2014-06-30):
496 # In the early days of the PRC, Tibet was given its own time zone (UT +06)
497 # but this was withdrawn in 1959 and never reinstated; see Tubten Khétsun,
498 # Memories of life in Lhasa under Chinese Rule, Columbia U Press, ISBN
499 # 978-0231142861 (2008), translator's introduction by Matthew Akester, p x.
500 # As this is before our 1970 cutoff, Tibet doesn't need a separate zone.
502 # Xinjiang Time is well-documented as being officially recognized. E.g., see
503 # "The Working-Calendar for The Xinjiang Uygur Autonomous Region Government"
504 # <http://www.sinkiang.gov.cn/service/ourworking/> (2014-04-22).
505 # Unfortunately, we have no good records of time in Xinjiang before 1986.
506 # During the 20th century parts of Xinjiang were ruled by the Qing dynasty,
507 # the Republic of China, various warlords, the First and Second East Turkestan
508 # Republics, the Soviet Union, the Kuomintang, and the People's Republic of
509 # China, and tracking down all these organizations' timekeeping rules would be
510 # quite a trick. Approximate this lost history by a transition from LMT to
511 # UT +06 at the start of 1928, the year of accession of the warlord Jin Shuren,
512 # which happens to be the date given by Shanks & Pottenger (no doubt as a
513 # guess) as the transition from LMT. Ignore the usage of +08 before
514 # 1986-02-01 under the theory that the transition date to +08 is unknown and
515 # that the sort of users who prefer Asia/Urumqi now typically ignored the
516 # +08 mandate back then.
518 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
519 # Beijing time, used throughout China; represented by Shanghai.
520 Zone Asia/Shanghai 8:05:43 - LMT 1901
523 # Xinjiang time, used by many in western China; represented by Ürümqi / Ürümchi
524 # / Wulumuqi. (Please use Asia/Shanghai if you prefer Beijing time.)
525 Zone Asia/Urumqi 5:50:20 - LMT 1928
529 # Hong Kong (Xianggang)
531 # Milne gives 7:36:41.7; round this.
533 # From Lee Yiu Chung (2009-10-24):
534 # I found there are some mistakes for the...DST rule for Hong
535 # Kong. [According] to the DST record from Hong Kong Observatory (actually,
536 # it is not [an] observatory, but the official meteorological agency of HK,
537 # and also serves as the official timing agency), there are some missing
538 # and incorrect rules. Although the exact switch over time is missing, I
539 # think 3:30 is correct. The official DST record for Hong Kong can be
541 # http://www.hko.gov.hk/gts/time/Summertime.htm
543 # From Arthur David Olson (2009-10-28):
544 # Here are the dates given at
545 # http://www.hko.gov.hk/gts/time/Summertime.htm
548 # 1941 1 Apr to 30 Sep
553 # 1946 20 Apr to 1 Dec
554 # 1947 13 Apr to 30 Dec
555 # 1948 2 May to 31 Oct
556 # 1949 3 Apr to 30 Oct
557 # 1950 2 Apr to 29 Oct
558 # 1951 1 Apr to 28 Oct
559 # 1952 6 Apr to 25 Oct
560 # 1953 5 Apr to 1 Nov
561 # 1954 21 Mar to 31 Oct
562 # 1955 20 Mar to 6 Nov
563 # 1956 18 Mar to 4 Nov
564 # 1957 24 Mar to 3 Nov
565 # 1958 23 Mar to 2 Nov
566 # 1959 22 Mar to 1 Nov
567 # 1960 20 Mar to 6 Nov
568 # 1961 19 Mar to 5 Nov
569 # 1962 18 Mar to 4 Nov
570 # 1963 24 Mar to 3 Nov
571 # 1964 22 Mar to 1 Nov
572 # 1965 18 Apr to 17 Oct
573 # 1966 17 Apr to 16 Oct
574 # 1967 16 Apr to 22 Oct
575 # 1968 21 Apr to 20 Oct
576 # 1969 20 Apr to 19 Oct
577 # 1970 19 Apr to 18 Oct
578 # 1971 18 Apr to 17 Oct
579 # 1972 16 Apr to 22 Oct
580 # 1973 22 Apr to 21 Oct
581 # 1973/74 30 Dec 73 to 20 Oct 74
582 # 1975 20 Apr to 19 Oct
583 # 1976 18 Apr to 17 Oct
586 # 1979 13 May to 21 Oct
588 # The page does not give start or end times of day.
589 # The page does not give a start date for 1942.
590 # The page does not givw an end date for 1945.
591 # The Japanese occupation of Hong Kong began on 1941-12-25.
592 # The Japanese surrender of Hong Kong was signed 1945-09-15.
593 # For lack of anything better, use start of those days as the transition times.
595 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
596 Rule HK 1941 only - Apr 1 3:30 1:00 S
597 Rule HK 1941 only - Sep 30 3:30 0 -
598 Rule HK 1946 only - Apr 20 3:30 1:00 S
599 Rule HK 1946 only - Dec 1 3:30 0 -
600 Rule HK 1947 only - Apr 13 3:30 1:00 S
601 Rule HK 1947 only - Dec 30 3:30 0 -
602 Rule HK 1948 only - May 2 3:30 1:00 S
603 Rule HK 1948 1951 - Oct lastSun 3:30 0 -
604 Rule HK 1952 only - Oct 25 3:30 0 -
605 Rule HK 1949 1953 - Apr Sun>=1 3:30 1:00 S
606 Rule HK 1953 only - Nov 1 3:30 0 -
607 Rule HK 1954 1964 - Mar Sun>=18 3:30 1:00 S
608 Rule HK 1954 only - Oct 31 3:30 0 -
609 Rule HK 1955 1964 - Nov Sun>=1 3:30 0 -
610 Rule HK 1965 1976 - Apr Sun>=16 3:30 1:00 S
611 Rule HK 1965 1976 - Oct Sun>=16 3:30 0 -
612 Rule HK 1973 only - Dec 30 3:30 1:00 S
613 Rule HK 1979 only - May Sun>=8 3:30 1:00 S
614 Rule HK 1979 only - Oct Sun>=16 3:30 0 -
615 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
616 Zone Asia/Hong_Kong 7:36:42 - LMT 1904 Oct 30
617 8:00 HK HK%sT 1941 Dec 25
618 9:00 - JST 1945 Sep 15
621 ###############################################################################
625 # From smallufo (2010-04-03):
626 # According to Taiwan's CWB [Central Weather Bureau],
627 # http://www.cwb.gov.tw/V6/astronomy/cdata/summert.htm
628 # Taipei has DST in 1979 between July 1st and Sep 30.
630 # From Yu-Cheng Chuang (2013-07-12):
631 # On Dec 28, 1895, the Meiji Emperor announced Ordinance No. 167 of
632 # Meiji Year 28 "The clause about standard time", mentioned that
633 # Taiwan and Penghu Islands, as well as Yaeyama and Miyako Islands
634 # (both in Okinawa) adopt the Western Standard Time which is based on
635 # 120E. The adoption began from Jan 1, 1896. The original text can be
636 # found on Wikisource:
637 # http://ja.wikisource.org/wiki/標準時ニ關スル件_(公布時)
638 # ... This could be the first adoption of time zone in Taiwan, because
639 # during the Qing Dynasty, it seems that there was no time zone
640 # declared officially.
642 # Later, in the beginning of World War II, on Sep 25, 1937, the Showa
643 # Emperor announced Ordinance No. 529 of Showa Year 12 "The clause of
644 # revision in the ordinance No. 167 of Meiji year 28 about standard
645 # time", in which abolished the adoption of Western Standard Time in
646 # western islands (listed above), which means the whole Japan
647 # territory, including later occupations, adopt Japan Central Time
648 # (UTC+9). The adoption began on Oct 1, 1937. The original text can
649 # be found on Wikisource:
650 # http://ja.wikisource.org/wiki/明治二十八年勅令第百六十七號標準時ニ關スル件中改正ノ件
652 # That is, the time zone of Taipei switched to UTC+9 on Oct 1, 1937.
654 # From Yu-Cheng Chuang (2014-07-02):
655 # I've found more evidence about when the time zone was switched from UTC+9
656 # back to UTC+8 after WW2. I believe it was on Sep 21, 1945. In a document
657 # during Japanese era [1] in which the officer told the staff to change time
658 # zone back to Western Standard Time (UTC+8) on Sep 21. And in another
659 # history page of National Cheng Kung University [2], on Sep 21 there is a
660 # note "from today, switch back to Western Standard Time". From these two
661 # materials, I believe that the time zone change happened on Sep 21. And
662 # today I have found another monthly journal called "The Astronomical Herald"
663 # from The Astronomical Society of Japan [3] in which it mentioned the fact
666 # 1. Standard Time of the Country (Japan) was adopted on Jan 1, 1888, using
667 # the time at 135E (GMT+9)
669 # 2. Standard Time of the Country was renamed to Central Standard Time, on Jan
670 # 1, 1898, and on the same day, the new territories Taiwan and Penghu islands,
671 # as well as Yaeyama and Miyako islands, adopted a new time zone called
672 # Western Standard Time, which is in GMT+8.
674 # 3. Western Standard Time was deprecated on Sep 30, 1937. From then all the
675 # territories of Japan adopted the same time zone, which is Central Standard
678 # [1] Academica Historica, Taiwan:
679 # http://163.29.208.22:8080/govsaleShowImage/connect_img.php?s=00101738900090036&e=00101738900090037
680 # [2] Nat'l Cheng Kung University 70th Anniversary Special Site:
681 # http://www.ncku.edu.tw/~ncku70/menu/001/01_01.htm
682 # [3] Yukio Niimi, The Standard Time in Japan (1997), p.475:
683 # http://www.asj.or.jp/geppou/archive_open/1997/pdf/19971001c.pdf
685 # Yu-Cheng Chuang (2014-07-03):
686 # I finally have found the real official gazette about changing back to
687 # Western Standard Time on Sep 21 in Taiwan. It's Taiwan Governor-General
688 # Bulletin No. 386 in Showa 20 years (1945), published on Sep 19, 1945. [1] ...
689 # [It] abolishes Bulletin No. 207 in Showa 12 years (1937), which is a local
690 # bulletin in Taiwan for that Ordinance No. 529. It also mentioned that 1am on
691 # Sep 21, 1945 will be 12am on Sep 21. I think this bulletin is much more
692 # official than the one I mentioned in my first mail, because it's from the
693 # top-level government in Taiwan. If you're going to quote any resource, this
694 # would be a good one.
695 # [1] Taiwan Governor-General Gazette, No. 1018, Sep 19, 1945:
696 # http://db2.th.gov.tw/db2/view/viewImg.php?imgcode=0072031018a&num=19&bgn=019&end=019&otherImg=&type=gener
698 # From Yu-Cheng Chuang (2014-07-02):
699 # In 1946, DST in Taiwan was from May 15 and ended on Sep 30. The info from
700 # Central Weather Bureau website was not correct.
703 # http://subtpg.tpg.gov.tw/og/image2.asp?f=03502F0AKM1AF
704 # http://subtpg.tpg.gov.tw/og/image2.asp?f=0350300AKM1B0 (cont.)
706 # In 1947, DST in Taiwan was expanded to Oct 31. There is a backup of that
707 # telegram announcement from Taiwan Province Government:
709 # http://subtpg.tpg.gov.tw/og/image2.asp?f=0360310AKZ431
711 # Here is a brief translation:
713 # The Summer Time this year is adopted from midnight Apr 15 until Sep 20
714 # midnight. To save (energy?) consumption, we're expanding Summer Time
715 # adoption till Oct 31 midnight.
717 # The Central Weather Bureau website didn't mention that, however it can
718 # be found from historical government announcement database.
720 # From Paul Eggert (2014-07-03):
721 # As per Yu-Cheng Chuang, say that Taiwan was at UT +09 from 1937-10-01
722 # until 1945-09-21 at 01:00, overriding Shanks & Pottenger.
723 # Likewise, use Yu-Cheng Chuang's data for DST in Taiwan.
725 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
726 Rule Taiwan 1946 only - May 15 0:00 1:00 D
727 Rule Taiwan 1946 only - Oct 1 0:00 0 S
728 Rule Taiwan 1947 only - Apr 15 0:00 1:00 D
729 Rule Taiwan 1947 only - Nov 1 0:00 0 S
730 Rule Taiwan 1948 1951 - May 1 0:00 1:00 D
731 Rule Taiwan 1948 1951 - Oct 1 0:00 0 S
732 Rule Taiwan 1952 only - Mar 1 0:00 1:00 D
733 Rule Taiwan 1952 1954 - Nov 1 0:00 0 S
734 Rule Taiwan 1953 1959 - Apr 1 0:00 1:00 D
735 Rule Taiwan 1955 1961 - Oct 1 0:00 0 S
736 Rule Taiwan 1960 1961 - Jun 1 0:00 1:00 D
737 Rule Taiwan 1974 1975 - Apr 1 0:00 1:00 D
738 Rule Taiwan 1974 1975 - Oct 1 0:00 0 S
739 Rule Taiwan 1979 only - Jul 1 0:00 1:00 D
740 Rule Taiwan 1979 only - Oct 1 0:00 0 S
742 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
743 # Taipei or Taibei or T'ai-pei
744 Zone Asia/Taipei 8:06:00 - LMT 1896 Jan 1
745 8:00 - JWST 1937 Oct 1
746 9:00 - JST 1945 Sep 21 1:00
749 # Macau (Macao, Aomen)
750 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
751 Rule Macau 1961 1962 - Mar Sun>=16 3:30 1:00 S
752 Rule Macau 1961 1964 - Nov Sun>=1 3:30 0 -
753 Rule Macau 1963 only - Mar Sun>=16 0:00 1:00 S
754 Rule Macau 1964 only - Mar Sun>=16 3:30 1:00 S
755 Rule Macau 1965 only - Mar Sun>=16 0:00 1:00 S
756 Rule Macau 1965 only - Oct 31 0:00 0 -
757 Rule Macau 1966 1971 - Apr Sun>=16 3:30 1:00 S
758 Rule Macau 1966 1971 - Oct Sun>=16 3:30 0 -
759 Rule Macau 1972 1974 - Apr Sun>=15 0:00 1:00 S
760 Rule Macau 1972 1973 - Oct Sun>=15 0:00 0 -
761 Rule Macau 1974 1977 - Oct Sun>=15 3:30 0 -
762 Rule Macau 1975 1977 - Apr Sun>=15 3:30 1:00 S
763 Rule Macau 1978 1980 - Apr Sun>=15 0:00 1:00 S
764 Rule Macau 1978 1980 - Oct Sun>=15 0:00 0 -
765 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
766 Zone Asia/Macau 7:34:20 - LMT 1912 Jan 1
767 8:00 Macau MO%sT 1999 Dec 20 # return to China
771 ###############################################################################
775 # Milne says the Eastern Telegraph Company used 2:14:00. Stick with LMT.
776 # IATA SSIM (1998-09) has Cyprus using EU rules for the first time.
778 # From Paul Eggert (2016-09-09):
779 # Yesterday's Cyprus Mail reports that Northern Cyprus followed Turkey's
780 # lead and switched from +02/+03 to +03 year-round.
781 # http://cyprus-mail.com/2016/09/08/two-time-zones-cyprus-turkey-will-not-turn-clocks-back-next-month/
783 # From Even Scharning (2016-10-31):
784 # Looks like the time zone split in Cyprus went through last night.
785 # http://cyprus-mail.com/2016/10/30/cyprus-new-division-two-time-zones-now-reality/
787 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
788 Rule Cyprus 1975 only - Apr 13 0:00 1:00 S
789 Rule Cyprus 1975 only - Oct 12 0:00 0 -
790 Rule Cyprus 1976 only - May 15 0:00 1:00 S
791 Rule Cyprus 1976 only - Oct 11 0:00 0 -
792 Rule Cyprus 1977 1980 - Apr Sun>=1 0:00 1:00 S
793 Rule Cyprus 1977 only - Sep 25 0:00 0 -
794 Rule Cyprus 1978 only - Oct 2 0:00 0 -
795 Rule Cyprus 1979 1997 - Sep lastSun 0:00 0 -
796 Rule Cyprus 1981 1998 - Mar lastSun 0:00 1:00 S
797 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
798 Zone Asia/Nicosia 2:13:28 - LMT 1921 Nov 14
799 2:00 Cyprus EE%sT 1998 Sep
801 Zone Asia/Famagusta 2:15:48 - LMT 1921 Nov 14
802 2:00 Cyprus EE%sT 1998 Sep
803 2:00 EUAsia EE%sT 2016 Sep 8
806 # Classically, Cyprus belongs to Asia; e.g. see Herodotus, Histories, I.72.
807 # However, for various reasons many users expect to find it under Europe.
808 Link Asia/Nicosia Europe/Nicosia
811 # From Paul Eggert (1994-11-19):
812 # Today's _Economist_ (p 60) reports that Georgia moved its clocks forward
813 # an hour recently, due to a law proposed by Zurab Murvanidze,
814 # an MP who went on a hunger strike for 11 days to force discussion about it!
815 # We have no details, but we'll guess they didn't move the clocks back in fall.
817 # From Mathew Englander, quoting AP (1996-10-23 13:05-04):
818 # Instead of putting back clocks at the end of October, Georgia
819 # will stay on daylight savings time this winter to save energy,
820 # President Eduard Shevardnadze decreed Wednesday.
822 # From the BBC via Joseph S. Myers (2004-06-27):
824 # Georgia moved closer to Western Europe on Sunday... The former Soviet
825 # republic has changed its time zone back to that of Moscow. As a result it
826 # is now just four hours ahead of Greenwich Mean Time, rather than five hours
827 # ahead. The switch was decreed by the pro-Western president of Georgia,
828 # Mikheil Saakashvili, who said the change was partly prompted by the process
829 # of integration into Europe.
831 # From Teimuraz Abashidze (2005-11-07):
832 # Government of Georgia ... decided to NOT CHANGE daylight savings time on
833 # [Oct.] 30, as it was done before during last more than 10 years.
834 # Currently, we are in fact GMT +4:00, as before 30 October it was GMT
835 # +3:00.... The problem is, there is NO FORMAL LAW or governmental document
836 # about it. As far as I can find, I was told, that there is no document,
837 # because we just DIDN'T ISSUE document about switching to winter time....
838 # I don't know what can be done, especially knowing that some years ago our
839 # DST rules where changed THREE TIMES during one month.
841 # Milne 1899 says Tbilisi (Tiflis) time was 2:59:05.7.
842 # Byalokoz 1919 says Georgia was 2:59:11.
845 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
846 Zone Asia/Tbilisi 2:59:11 - LMT 1880
847 2:59:11 - TBMT 1924 May 2 # Tbilisi Mean Time
849 4:00 RussiaAsia +04/+05 1991 Mar 31 2:00s
850 3:00 RussiaAsia +03/+04 1992
851 3:00 E-EurAsia +03/+04 1994 Sep lastSun
852 4:00 E-EurAsia +04/+05 1996 Oct lastSun
853 4:00 1:00 +05 1997 Mar lastSun
854 4:00 E-EurAsia +04/+05 2004 Jun 27
855 3:00 RussiaAsia +03/+04 2005 Mar lastSun 2:00
860 # See Indonesia for the 1945 transition.
862 # From João Carrascalão, brother of the former governor of East Timor, in
863 # East Timor may be late for its millennium
864 # <http://etan.org/et99c/december/26-31/30ETMAY.htm> (1999-12-26/31):
865 # Portugal tried to change the time forward in 1974 because the sun
866 # rises too early but the suggestion raised a lot of problems with the
867 # Timorese and I still don't think it would work today because it
868 # conflicts with their way of life.
870 # From Paul Eggert (2000-12-04):
871 # We don't have any record of the above attempt.
872 # Most likely our records are incomplete, but we have no better data.
874 # From Manoel de Almeida e Silva, Deputy Spokesman for the UN Secretary-General
875 # http://www.hri.org/news/world/undh/2000/00-08-16.undh.html
877 # The Cabinet of the East Timor Transition Administration decided
878 # today to advance East Timor's time by one hour. The time change,
879 # which will be permanent, with no seasonal adjustment, will happen at
880 # midnight on Saturday, September 16.
882 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
883 Zone Asia/Dili 8:22:20 - LMT 1912 Jan 1
884 8:00 - TLT 1942 Feb 21 23:00 # E Timor Time
885 9:00 - JST 1945 Sep 23
886 9:00 - TLT 1976 May 3
887 8:00 - WITA 2000 Sep 17 0:00
892 # From Ian P. Beacock, in "A brief history of (modern) time", The Atlantic
893 # http://www.theatlantic.com/technology/archive/2015/12/the-creation-of-modern-time/421419/
895 # In January 1906, several thousand cotton-mill workers rioted on the
896 # outskirts of Bombay.... They were protesting the proposed abolition of
897 # local time in favor of Indian Standard Time.... Journalists called this
898 # dispute the "Battle of the Clocks." It lasted nearly half a century.
900 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
901 Zone Asia/Kolkata 5:53:28 - LMT 1880 # Kolkata
902 5:53:20 - HMT 1941 Oct # Howrah Mean Time?
903 6:30 - BURT 1942 May 15 # Burma Time
905 5:30 1:00 IST 1945 Oct 15
907 # The following are like Asia/Kolkata:
909 # Lakshadweep (Laccadive, Minicoy and Amindivi Is)
914 # From Paul Eggert (2014-09-06):
915 # The 1876 Report of the Secretary of the [US] Navy, p 306 says that Batavia
916 # civil time was 7:07:12.5; round to even for Jakarta.
918 # From Gwillim Law (2001-05-28), overriding Shanks & Pottenger:
919 # http://www.sumatera-inc.com/go_to_invest/about_indonesia.asp#standtime
920 # says that Indonesia's time zones changed on 1988-01-01. Looking at some
921 # time zone maps, I think that must refer to Western Borneo (Kalimantan Barat
922 # and Kalimantan Tengah) switching from UTC+8 to UTC+7.
924 # From Paul Eggert (2007-03-10):
925 # Here is another correction to Shanks & Pottenger.
926 # JohnTWB writes that Japanese forces did not surrender control in
927 # Indonesia until 1945-09-01 00:00 at the earliest (in Jakarta) and
928 # other formal surrender ceremonies were September 9, 11, and 13, plus
929 # September 12 for the regional surrender to Mountbatten in Singapore.
930 # These would be the earliest possible times for a change.
931 # Régimes horaires pour le monde entier, by Henri Le Corre, (Éditions
932 # Traditionnelles, 1987, Paris) says that Java and Madura switched
933 # from UT +09 to +07:30 on 1945-09-23, and gives 1944-09-01 for Jayapura
934 # (Hollandia). For now, assume all Indonesian locations other than Jayapura
935 # switched on 1945-09-23.
937 # From Paul Eggert (2013-08-11):
938 # Normally the tz database uses English-language abbreviations, but in
939 # Indonesia it's typical to use Indonesian-language abbreviations even
940 # when writing in English. For example, see the English-language
941 # summary published by the Time and Frequency Laboratory of the
942 # Research Center for Calibration, Instrumentation and Metrology,
943 # Indonesia, <http://time.kim.lipi.go.id/time-eng.php> (2006-09-29).
944 # The time zone abbreviations and UT offsets are:
946 # WIB - +07 - Waktu Indonesia Barat (Indonesia western time)
947 # WITA - +08 - Waktu Indonesia Tengah (Indonesia central time)
948 # WIT - +09 - Waktu Indonesia Timur (Indonesia eastern time)
950 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
952 Zone Asia/Jakarta 7:07:12 - LMT 1867 Aug 10
953 # Shanks & Pottenger say the next transition was at 1924 Jan 1 0:13,
954 # but this must be a typo.
955 7:07:12 - BMT 1923 Dec 31 23:47:12 # Batavia
956 7:20 - JAVT 1932 Nov # Java Time
957 7:30 - WIB 1942 Mar 23
958 9:00 - JST 1945 Sep 23
963 # west and central Borneo
964 Zone Asia/Pontianak 7:17:20 - LMT 1908 May
965 7:17:20 - PMT 1932 Nov # Pontianak MT
966 7:30 - WIB 1942 Jan 29
967 9:00 - JST 1945 Sep 23
971 8:00 - WITA 1988 Jan 1
973 # Sulawesi, Lesser Sundas, east and south Borneo
974 Zone Asia/Makassar 7:57:36 - LMT 1920
975 7:57:36 - MMT 1932 Nov # Macassar MT
976 8:00 - WITA 1942 Feb 9
977 9:00 - JST 1945 Sep 23
979 # Maluku Islands, West Papua, Papua
980 Zone Asia/Jayapura 9:22:48 - LMT 1932 Nov
981 9:00 - WIT 1944 Sep 1
987 # From Roozbeh Pournader (2003-03-15):
988 # This is an English translation of what I just found (originally in Persian).
989 # The Gregorian dates in brackets are mine:
991 # Official Newspaper No. 13548-1370/6/25 [1991-09-16]
992 # No. 16760/T233 H 1370/6/10 [1991-09-01]
994 # The Rule About Change of the Official Time of the Country
996 # The Board of Ministers, in the meeting dated 1370/5/23 [1991-08-14],
997 # based on the suggestion number 2221/D dated 1370/4/22 [1991-07-13]
998 # of the Country's Organization for Official and Employment Affairs,
999 # and referring to the law for equating the working hours of workers
1000 # and officers in the whole country dated 1359/4/23 [1980-07-14], and
1001 # for synchronizing the official times of the country, agreed that:
1003 # The official time of the country will should move forward one hour
1004 # at the 24[:00] hours of the first day of Farvardin and should return
1005 # to its previous state at the 24[:00] hours of the 30th day of
1008 # First Deputy to the President - Hassan Habibi
1010 # From personal experience, that agrees with what has been followed
1011 # for at least the last 5 years. Before that, for a few years, the
1012 # date used was the first Thursday night of Farvardin and the last
1013 # Thursday night of Shahrivar, but I can't give exact dates....
1014 # I have also changed the abbreviations to what is considered correct
1015 # here in Iran, IRST for regular time and IRDT for daylight saving time.
1017 # From Roozbeh Pournader (2005-04-05):
1018 # The text of the Iranian law, in effect since 1925, clearly mentions
1019 # that the true solar year is the measure, and there is no arithmetic
1020 # leap year calculation involved. There has never been any serious
1021 # plan to change that law....
1023 # From Paul Eggert (2006-03-22):
1024 # Go with Shanks & Pottenger before Sept. 1991, and with Pournader thereafter.
1025 # I used Ed Reingold's cal-persia in GNU Emacs 21.2 to check Persian dates,
1026 # stopping after 2037 when 32-bit time_t's overflow.
1027 # That cal-persia used Birashk's approximation, which disagrees with the solar
1028 # calendar predictions for the year 2025, so I corrected those dates by hand.
1030 # From Oscar van Vlijmen (2005-03-30), writing about future
1031 # discrepancies between cal-persia and the Iranian calendar:
1032 # For 2091 solar-longitude-after yields 2091-03-20 08:40:07.7 UT for
1033 # the vernal equinox and that gets so close to 12:00 some local
1034 # Iranian time that the definition of the correct location needs to be
1035 # known exactly, amongst other factors. 2157 is even closer:
1036 # 2157-03-20 08:37:15.5 UT. But the Gregorian year 2025 should give
1037 # no interpretation problem whatsoever. By the way, another instant
1038 # in the near future where there will be a discrepancy between
1039 # arithmetical and astronomical Iranian calendars will be in 2058:
1040 # vernal equinox on 2058-03-20 09:03:05.9 UT. The Java version of
1041 # Reingold's/Dershowitz' calculator gives correctly the Gregorian date
1042 # 2058-03-21 for 1 Farvardin 1437 (astronomical).
1044 # From Steffen Thorsen (2006-03-22):
1045 # Several of my users have reported that Iran will not observe DST anymore:
1046 # http://www.irna.ir/en/news/view/line-17/0603193812164948.htm
1048 # From Reuters (2007-09-16), with a heads-up from Jesper Nørgaard Welen:
1049 # ... the Guardian Council ... approved a law on Sunday to re-introduce
1050 # daylight saving time ...
1051 # http://uk.reuters.com/article/oilRpt/idUKBLA65048420070916
1053 # From Roozbeh Pournader (2007-11-05):
1054 # This is quoted from Official Gazette of the Islamic Republic of
1055 # Iran, Volume 63, No. 18242, dated Tuesday 1386/6/24
1056 # [2007-10-16]. I am doing the best translation I can:...
1057 # The official time of the country will be moved forward for one hour
1058 # on the 24 hours of the first day of the month of Farvardin and will
1059 # be changed back to its previous state on the 24 hours of the
1060 # thirtieth day of Shahrivar.
1062 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1063 Rule Iran 1978 1980 - Mar 21 0:00 1:00 D
1064 Rule Iran 1978 only - Oct 21 0:00 0 S
1065 Rule Iran 1979 only - Sep 19 0:00 0 S
1066 Rule Iran 1980 only - Sep 23 0:00 0 S
1067 Rule Iran 1991 only - May 3 0:00 1:00 D
1068 Rule Iran 1992 1995 - Mar 22 0:00 1:00 D
1069 Rule Iran 1991 1995 - Sep 22 0:00 0 S
1070 Rule Iran 1996 only - Mar 21 0:00 1:00 D
1071 Rule Iran 1996 only - Sep 21 0:00 0 S
1072 Rule Iran 1997 1999 - Mar 22 0:00 1:00 D
1073 Rule Iran 1997 1999 - Sep 22 0:00 0 S
1074 Rule Iran 2000 only - Mar 21 0:00 1:00 D
1075 Rule Iran 2000 only - Sep 21 0:00 0 S
1076 Rule Iran 2001 2003 - Mar 22 0:00 1:00 D
1077 Rule Iran 2001 2003 - Sep 22 0:00 0 S
1078 Rule Iran 2004 only - Mar 21 0:00 1:00 D
1079 Rule Iran 2004 only - Sep 21 0:00 0 S
1080 Rule Iran 2005 only - Mar 22 0:00 1:00 D
1081 Rule Iran 2005 only - Sep 22 0:00 0 S
1082 Rule Iran 2008 only - Mar 21 0:00 1:00 D
1083 Rule Iran 2008 only - Sep 21 0:00 0 S
1084 Rule Iran 2009 2011 - Mar 22 0:00 1:00 D
1085 Rule Iran 2009 2011 - Sep 22 0:00 0 S
1086 Rule Iran 2012 only - Mar 21 0:00 1:00 D
1087 Rule Iran 2012 only - Sep 21 0:00 0 S
1088 Rule Iran 2013 2015 - Mar 22 0:00 1:00 D
1089 Rule Iran 2013 2015 - Sep 22 0:00 0 S
1090 Rule Iran 2016 only - Mar 21 0:00 1:00 D
1091 Rule Iran 2016 only - Sep 21 0:00 0 S
1092 Rule Iran 2017 2019 - Mar 22 0:00 1:00 D
1093 Rule Iran 2017 2019 - Sep 22 0:00 0 S
1094 Rule Iran 2020 only - Mar 21 0:00 1:00 D
1095 Rule Iran 2020 only - Sep 21 0:00 0 S
1096 Rule Iran 2021 2023 - Mar 22 0:00 1:00 D
1097 Rule Iran 2021 2023 - Sep 22 0:00 0 S
1098 Rule Iran 2024 only - Mar 21 0:00 1:00 D
1099 Rule Iran 2024 only - Sep 21 0:00 0 S
1100 Rule Iran 2025 2027 - Mar 22 0:00 1:00 D
1101 Rule Iran 2025 2027 - Sep 22 0:00 0 S
1102 Rule Iran 2028 2029 - Mar 21 0:00 1:00 D
1103 Rule Iran 2028 2029 - Sep 21 0:00 0 S
1104 Rule Iran 2030 2031 - Mar 22 0:00 1:00 D
1105 Rule Iran 2030 2031 - Sep 22 0:00 0 S
1106 Rule Iran 2032 2033 - Mar 21 0:00 1:00 D
1107 Rule Iran 2032 2033 - Sep 21 0:00 0 S
1108 Rule Iran 2034 2035 - Mar 22 0:00 1:00 D
1109 Rule Iran 2034 2035 - Sep 22 0:00 0 S
1111 # The following rules are approximations starting in the year 2038.
1112 # These are the best post-2037 approximations available, given the
1113 # restrictions of a single rule using a Gregorian-based data format.
1114 # At some point this table will need to be extended, though quite
1115 # possibly Iran will change the rules first.
1116 Rule Iran 2036 max - Mar 21 0:00 1:00 D
1117 Rule Iran 2036 max - Sep 21 0:00 0 S
1119 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1120 Zone Asia/Tehran 3:25:44 - LMT 1916
1121 3:25:44 - TMT 1946 # Tehran Mean Time
1122 3:30 - IRST 1977 Nov
1123 4:00 Iran IR%sT 1979
1129 # From Jonathan Lennox (2000-06-12):
1130 # An article in this week's Economist ("Inside the Saddam-free zone", p. 50 in
1131 # the U.S. edition) on the Iraqi Kurds contains a paragraph:
1132 # "The three northern provinces ... switched their clocks this spring and
1133 # are an hour ahead of Baghdad."
1135 # But Rives McDow (2000-06-18) quotes a contact in Iraqi-Kurdistan as follows:
1136 # In the past, some Kurdish nationalists, as a protest to the Iraqi
1137 # Government, did not adhere to daylight saving time. They referred
1138 # to daylight saving as Saddam time. But, as of today, the time zone
1139 # in Iraqi-Kurdistan is on standard time with Baghdad, Iraq.
1141 # So we'll ignore the Economist's claim.
1143 # From Steffen Thorsen (2008-03-10):
1144 # The cabinet in Iraq abolished DST last week, according to the following
1145 # news sources (in Arabic):
1146 # http://www.aljeeran.net/wesima_articles/news-20080305-98602.html
1147 # http://www.aswataliraq.info/look/article.tpl?id=2047&IdLanguage=17&IdPublication=4&NrArticle=71743&NrIssue=1&NrSection=10
1149 # We have published a short article in English about the change:
1150 # http://www.timeanddate.com/news/time/iraq-dumps-daylight-saving.html
1152 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1153 Rule Iraq 1982 only - May 1 0:00 1:00 D
1154 Rule Iraq 1982 1984 - Oct 1 0:00 0 S
1155 Rule Iraq 1983 only - Mar 31 0:00 1:00 D
1156 Rule Iraq 1984 1985 - Apr 1 0:00 1:00 D
1157 Rule Iraq 1985 1990 - Sep lastSun 1:00s 0 S
1158 Rule Iraq 1986 1990 - Mar lastSun 1:00s 1:00 D
1159 # IATA SSIM (1991/1996) says Apr 1 12:01am UTC; guess the ':01' is a typo.
1160 # Shanks & Pottenger say Iraq did not observe DST 1992/1997; ignore this.
1162 Rule Iraq 1991 2007 - Apr 1 3:00s 1:00 D
1163 Rule Iraq 1991 2007 - Oct 1 3:00s 0 S
1164 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1165 Zone Asia/Baghdad 2:57:40 - LMT 1890
1166 2:57:36 - BMT 1918 # Baghdad Mean Time?
1171 ###############################################################################
1175 # From Ephraim Silverberg (2001-01-11):
1177 # I coined "IST/IDT" circa 1988. Until then there were three
1178 # different abbreviations in use:
1180 # JST Jerusalem Standard Time [Danny Braniss, Hebrew University]
1181 # IZT Israel Zonal (sic) Time [Prof. Haim Papo, Technion]
1182 # EEST Eastern Europe Standard Time [used by almost everyone else]
1184 # Since timezones should be called by country and not capital cities,
1185 # I ruled out JST. As Israel is in Asia Minor and not Eastern Europe,
1186 # EEST was equally unacceptable. Since "zonal" was not compatible with
1187 # any other timezone abbreviation, I felt that 'IST' was the way to go
1188 # and, indeed, it has received almost universal acceptance in timezone
1189 # settings in Israeli computers.
1191 # In any case, I am happy to share timezone abbreviations with India,
1192 # high on my favorite-country list (and not only because my wife's
1193 # family is from India).
1195 # From Shanks & Pottenger:
1196 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1197 Rule Zion 1940 only - Jun 1 0:00 1:00 D
1198 Rule Zion 1942 1944 - Nov 1 0:00 0 S
1199 Rule Zion 1943 only - Apr 1 2:00 1:00 D
1200 Rule Zion 1944 only - Apr 1 0:00 1:00 D
1201 Rule Zion 1945 only - Apr 16 0:00 1:00 D
1202 Rule Zion 1945 only - Nov 1 2:00 0 S
1203 Rule Zion 1946 only - Apr 16 2:00 1:00 D
1204 Rule Zion 1946 only - Nov 1 0:00 0 S
1205 Rule Zion 1948 only - May 23 0:00 2:00 DD
1206 Rule Zion 1948 only - Sep 1 0:00 1:00 D
1207 Rule Zion 1948 1949 - Nov 1 2:00 0 S
1208 Rule Zion 1949 only - May 1 0:00 1:00 D
1209 Rule Zion 1950 only - Apr 16 0:00 1:00 D
1210 Rule Zion 1950 only - Sep 15 3:00 0 S
1211 Rule Zion 1951 only - Apr 1 0:00 1:00 D
1212 Rule Zion 1951 only - Nov 11 3:00 0 S
1213 Rule Zion 1952 only - Apr 20 2:00 1:00 D
1214 Rule Zion 1952 only - Oct 19 3:00 0 S
1215 Rule Zion 1953 only - Apr 12 2:00 1:00 D
1216 Rule Zion 1953 only - Sep 13 3:00 0 S
1217 Rule Zion 1954 only - Jun 13 0:00 1:00 D
1218 Rule Zion 1954 only - Sep 12 0:00 0 S
1219 Rule Zion 1955 only - Jun 11 2:00 1:00 D
1220 Rule Zion 1955 only - Sep 11 0:00 0 S
1221 Rule Zion 1956 only - Jun 3 0:00 1:00 D
1222 Rule Zion 1956 only - Sep 30 3:00 0 S
1223 Rule Zion 1957 only - Apr 29 2:00 1:00 D
1224 Rule Zion 1957 only - Sep 22 0:00 0 S
1225 Rule Zion 1974 only - Jul 7 0:00 1:00 D
1226 Rule Zion 1974 only - Oct 13 0:00 0 S
1227 Rule Zion 1975 only - Apr 20 0:00 1:00 D
1228 Rule Zion 1975 only - Aug 31 0:00 0 S
1229 Rule Zion 1985 only - Apr 14 0:00 1:00 D
1230 Rule Zion 1985 only - Sep 15 0:00 0 S
1231 Rule Zion 1986 only - May 18 0:00 1:00 D
1232 Rule Zion 1986 only - Sep 7 0:00 0 S
1233 Rule Zion 1987 only - Apr 15 0:00 1:00 D
1234 Rule Zion 1987 only - Sep 13 0:00 0 S
1236 # From Avigdor Finkelstein (2014-03-05):
1237 # I check the Parliament (Knesset) records and there it's stated that the
1238 # [1988] transition should take place on Saturday night, when the Sabbath
1239 # ends and changes to Sunday.
1240 Rule Zion 1988 only - Apr 10 0:00 1:00 D
1241 Rule Zion 1988 only - Sep 4 0:00 0 S
1243 # From Ephraim Silverberg
1244 # (1997-03-04, 1998-03-16, 1998-12-28, 2000-01-17, 2000-07-25, 2004-12-22,
1247 # According to the Office of the Secretary General of the Ministry of
1248 # Interior, there is NO set rule for Daylight-Savings/Standard time changes.
1249 # One thing is entrenched in law, however: that there must be at least 150
1250 # days of daylight savings time annually. From 1993-1998, the change to
1251 # daylight savings time was on a Friday morning from midnight IST to
1252 # 1 a.m IDT; up until 1998, the change back to standard time was on a
1253 # Saturday night from midnight daylight savings time to 11 p.m. standard
1254 # time. 1996 is an exception to this rule where the change back to standard
1255 # time took place on Sunday night instead of Saturday night to avoid
1256 # conflicts with the Jewish New Year. In 1999, the change to
1257 # daylight savings time was still on a Friday morning but from
1258 # 2 a.m. IST to 3 a.m. IDT; furthermore, the change back to standard time
1259 # was also on a Friday morning from 2 a.m. IDT to 1 a.m. IST for
1260 # 1999 only. In the year 2000, the change to daylight savings time was
1261 # similar to 1999, but although the change back will be on a Friday, it
1262 # will take place from 1 a.m. IDT to midnight IST. Starting in 2001, all
1263 # changes to/from will take place at 1 a.m. old time, but now there is no
1264 # rule as to what day of the week it will take place in as the start date
1265 # (except in 2003) is the night after the Passover Seder (i.e. the eve
1266 # of the 16th of Nisan in the lunar Hebrew calendar) and the end date
1267 # (except in 2002) is three nights before Yom Kippur [Day of Atonement]
1268 # (the eve of the 7th of Tishrei in the lunar Hebrew calendar).
1270 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1271 Rule Zion 1989 only - Apr 30 0:00 1:00 D
1272 Rule Zion 1989 only - Sep 3 0:00 0 S
1273 Rule Zion 1990 only - Mar 25 0:00 1:00 D
1274 Rule Zion 1990 only - Aug 26 0:00 0 S
1275 Rule Zion 1991 only - Mar 24 0:00 1:00 D
1276 Rule Zion 1991 only - Sep 1 0:00 0 S
1277 Rule Zion 1992 only - Mar 29 0:00 1:00 D
1278 Rule Zion 1992 only - Sep 6 0:00 0 S
1279 Rule Zion 1993 only - Apr 2 0:00 1:00 D
1280 Rule Zion 1993 only - Sep 5 0:00 0 S
1282 # The dates for 1994-1995 were obtained from Office of the Spokeswoman for the
1283 # Ministry of Interior, Jerusalem, Israel. The spokeswoman can be reached by
1284 # calling the office directly at 972-2-6701447 or 972-2-6701448.
1286 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1287 Rule Zion 1994 only - Apr 1 0:00 1:00 D
1288 Rule Zion 1994 only - Aug 28 0:00 0 S
1289 Rule Zion 1995 only - Mar 31 0:00 1:00 D
1290 Rule Zion 1995 only - Sep 3 0:00 0 S
1292 # The dates for 1996 were determined by the Minister of Interior of the
1293 # time, Haim Ramon. The official announcement regarding 1996-1998
1294 # (with the dates for 1997-1998 no longer being relevant) can be viewed at:
1296 # ftp://ftp.cs.huji.ac.il/pub/tz/announcements/1996-1998.ramon.ps.gz
1298 # The dates for 1997-1998 were altered by his successor, Rabbi Eli Suissa.
1300 # The official announcements for the years 1997-1999 can be viewed at:
1302 # ftp://ftp.cs.huji.ac.il/pub/tz/announcements/YYYY.ps.gz
1304 # where YYYY is the relevant year.
1306 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1307 Rule Zion 1996 only - Mar 15 0:00 1:00 D
1308 Rule Zion 1996 only - Sep 16 0:00 0 S
1309 Rule Zion 1997 only - Mar 21 0:00 1:00 D
1310 Rule Zion 1997 only - Sep 14 0:00 0 S
1311 Rule Zion 1998 only - Mar 20 0:00 1:00 D
1312 Rule Zion 1998 only - Sep 6 0:00 0 S
1313 Rule Zion 1999 only - Apr 2 2:00 1:00 D
1314 Rule Zion 1999 only - Sep 3 2:00 0 S
1316 # The Knesset Interior Committee has changed the dates for 2000 for
1317 # the third time in just over a year and have set new dates for the
1318 # years 2001-2004 as well.
1320 # The official announcement for the start date of 2000 can be viewed at:
1322 # ftp://ftp.cs.huji.ac.il/pub/tz/announcements/2000-start.ps.gz
1324 # The official announcement for the end date of 2000 and the dates
1325 # for the years 2001-2004 can be viewed at:
1327 # ftp://ftp.cs.huji.ac.il/pub/tz/announcements/2000-2004.ps.gz
1329 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1330 Rule Zion 2000 only - Apr 14 2:00 1:00 D
1331 Rule Zion 2000 only - Oct 6 1:00 0 S
1332 Rule Zion 2001 only - Apr 9 1:00 1:00 D
1333 Rule Zion 2001 only - Sep 24 1:00 0 S
1334 Rule Zion 2002 only - Mar 29 1:00 1:00 D
1335 Rule Zion 2002 only - Oct 7 1:00 0 S
1336 Rule Zion 2003 only - Mar 28 1:00 1:00 D
1337 Rule Zion 2003 only - Oct 3 1:00 0 S
1338 Rule Zion 2004 only - Apr 7 1:00 1:00 D
1339 Rule Zion 2004 only - Sep 22 1:00 0 S
1341 # The proposed law agreed upon by the Knesset Interior Committee on
1342 # 2005-02-14 is that, for 2005 and beyond, DST starts at 02:00 the
1343 # last Friday before April 2nd (i.e. the last Friday in March or April
1344 # 1st itself if it falls on a Friday) and ends at 02:00 on the Saturday
1345 # night _before_ the fast of Yom Kippur.
1347 # Those who can read Hebrew can view the announcement at:
1349 # ftp://ftp.cs.huji.ac.il/pub/tz/announcements/2005+beyond.ps
1351 # From Paul Eggert (2012-10-26):
1352 # I used Ephraim Silverberg's dst-israel.el program
1353 # <ftp://ftp.cs.huji.ac.il/pub/tz/software/dst-israel.el> (2005-02-20)
1354 # along with Ed Reingold's cal-hebrew in GNU Emacs 21.4,
1355 # to generate the transitions from 2005 through 2012.
1356 # (I replaced "lastFri" with "Fri>=26" by hand.)
1357 # The spring transitions all correspond to the following Rule:
1359 # Rule Zion 2005 2012 - Mar Fri>=26 2:00 1:00 D
1361 # but older zic implementations (e.g., Solaris 8) do not support
1362 # "Fri>=26" to mean April 1 in years like 2005, so for now we list the
1363 # springtime transitions explicitly.
1365 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1366 Rule Zion 2005 only - Apr 1 2:00 1:00 D
1367 Rule Zion 2005 only - Oct 9 2:00 0 S
1368 Rule Zion 2006 2010 - Mar Fri>=26 2:00 1:00 D
1369 Rule Zion 2006 only - Oct 1 2:00 0 S
1370 Rule Zion 2007 only - Sep 16 2:00 0 S
1371 Rule Zion 2008 only - Oct 5 2:00 0 S
1372 Rule Zion 2009 only - Sep 27 2:00 0 S
1373 Rule Zion 2010 only - Sep 12 2:00 0 S
1374 Rule Zion 2011 only - Apr 1 2:00 1:00 D
1375 Rule Zion 2011 only - Oct 2 2:00 0 S
1376 Rule Zion 2012 only - Mar Fri>=26 2:00 1:00 D
1377 Rule Zion 2012 only - Sep 23 2:00 0 S
1379 # From Ephraim Silverberg (2013-06-27):
1380 # On June 23, 2013, the Israeli government approved changes to the
1381 # Time Decree Law. The next day, the changes passed the First Reading
1382 # in the Knesset. The law is expected to pass the Second and Third
1383 # (final) Readings by the beginning of September 2013.
1385 # As of 2013, DST starts at 02:00 on the Friday before the last Sunday
1386 # in March. DST ends at 02:00 on the last Sunday of October.
1388 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1389 Rule Zion 2013 max - Mar Fri>=23 2:00 1:00 D
1390 Rule Zion 2013 max - Oct lastSun 2:00 0 S
1392 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1393 Zone Asia/Jerusalem 2:20:54 - LMT 1880
1394 2:20:40 - JMT 1918 # Jerusalem Mean Time?
1399 ###############################################################################
1403 # '9:00' and 'JST' is from Guy Harris.
1405 # From Paul Eggert (1995-03-06):
1406 # Today's _Asahi Evening News_ (page 4) reports that Japan had
1407 # daylight saving between 1948 and 1951, but "the system was discontinued
1408 # because the public believed it would lead to longer working hours."
1410 # From Mayumi Negishi in the 2005-08-10 Japan Times:
1411 # http://www.japantimes.co.jp/cgi-bin/getarticle.pl5?nn20050810f2.htm
1412 # Occupation authorities imposed daylight-saving time on Japan on
1413 # [1948-05-01].... But lack of prior debate and the execution of
1414 # daylight-saving time just three days after the bill was passed generated
1415 # deep hatred of the concept.... The Diet unceremoniously passed a bill to
1416 # dump the unpopular system in October 1951, less than a month after the San
1417 # Francisco Peace Treaty was signed. (A government poll in 1951 showed 53%
1418 # of the Japanese wanted to scrap daylight-saving time, as opposed to 30% who
1419 # wanted to keep it.)
1421 # From Paul Eggert (2006-03-22):
1422 # Shanks & Pottenger write that DST in Japan during those years was as follows:
1423 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1424 Rule Japan 1948 only - May Sun>=1 2:00 1:00 D
1425 Rule Japan 1948 1951 - Sep Sat>=8 2:00 0 S
1426 Rule Japan 1949 only - Apr Sun>=1 2:00 1:00 D
1427 Rule Japan 1950 1951 - May Sun>=1 2:00 1:00 D
1428 # but the only locations using it (for birth certificates, presumably, since
1429 # their audience is astrologers) were US military bases. For now, assume
1430 # that for most purposes daylight-saving time was observed; otherwise, what
1431 # would have been the point of the 1951 poll?
1433 # From Hideyuki Suzuki (1998-11-09):
1434 # 'Tokyo' usually stands for the former location of Tokyo Astronomical
1435 # Observatory: 139 degrees 44' 40.90" E (9h 18m 58.727s),
1436 # 35 degrees 39' 16.0" N.
1437 # This data is from 'Rika Nenpyou (Chronological Scientific Tables) 1996'
1438 # edited by National Astronomical Observatory of Japan....
1439 # JST (Japan Standard Time) has been used since 1888-01-01 00:00 (JST).
1440 # The law is enacted on 1886-07-07.
1442 # From Hideyuki Suzuki (1998-11-16):
1443 # The ordinance No. 51 (1886) established "standard time" in Japan,
1444 # which stands for the time on 135 degrees E.
1445 # In the ordinance No. 167 (1895), "standard time" was renamed to "central
1446 # standard time". And the same ordinance also established "western standard
1447 # time", which stands for the time on 120 degrees E.... But "western standard
1448 # time" was abolished in the ordinance No. 529 (1937). In the ordinance No.
1449 # 167, there is no mention regarding for what place western standard time is
1452 # I wrote "ordinance" above, but I don't know how to translate.
1453 # In Japanese it's "chokurei", which means ordinance from emperor.
1455 # From Yu-Cheng Chuang (2013-07-12):
1456 # ...the Meiji Emperor announced Ordinance No. 167 of Meiji Year 28 "The clause
1457 # about standard time" ... The adoption began from Jan 1, 1896.
1458 # http://ja.wikisource.org/wiki/標準時ニ關スル件_(公布時)
1460 # ...the Showa Emperor announced Ordinance No. 529 of Showa Year 12 ... which
1461 # means the whole Japan territory, including later occupations, adopt Japan
1462 # Central Time (UTC+9). The adoption began on Oct 1, 1937.
1463 # http://ja.wikisource.org/wiki/明治二十八年勅令第百六十七號標準時ニ關スル件中改正ノ件
1465 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1466 Zone Asia/Tokyo 9:18:59 - LMT 1887 Dec 31 15:00u
1467 9:00 - JST 1896 Jan 1
1468 9:00 - JCST 1937 Oct 1
1470 # Since 1938, all Japanese possessions have been like Asia/Tokyo.
1474 # From <http://star.arabia.com/990701/JO9.html>
1475 # Jordan Week (1999-07-01) via Steffen Thorsen (1999-09-09):
1476 # Clocks in Jordan were forwarded one hour on Wednesday at midnight,
1477 # in accordance with the government's decision to implement summer time
1480 # From <http://star.arabia.com/990930/JO9.html>
1481 # Jordan Week (1999-09-30) via Steffen Thorsen (1999-11-09):
1482 # Winter time starts today Thursday, 30 September. Clocks will be turned back
1483 # by one hour. This is the latest government decision and it's final!
1484 # The decision was taken because of the increase in working hours in
1485 # government's departments from six to seven hours.
1487 # From Paul Eggert (2005-11-22):
1488 # Starting 2003 transitions are from Steffen Thorsen's web site timeanddate.com.
1490 # From Steffen Thorsen (2005-11-23):
1491 # For Jordan I have received multiple independent user reports every year
1492 # about DST end dates, as the end-rule is different every year.
1494 # From Steffen Thorsen (2006-10-01), after a heads-up from Hilal Malawi:
1495 # http://www.petranews.gov.jo/nepras/2006/Sep/05/4000.htm
1496 # "Jordan will switch to winter time on Friday, October 27".
1499 # From Steffen Thorsen (2009-04-02):
1500 # This single one might be good enough, (2009-03-24, Arabic):
1501 # http://petra.gov.jo/Artical.aspx?Lng=2&Section=8&Artical=95279
1503 # Google's translation:
1505 # > The Council of Ministers decided in 2002 to adopt the principle of timely
1506 # > submission of the summer at 60 minutes as of midnight on the last Thursday
1507 # > of the month of March of each year.
1509 # So - this means the midnight between Thursday and Friday since 2002.
1511 # From Arthur David Olson (2009-04-06):
1512 # We still have Jordan switching to DST on Thursdays in 2000 and 2001.
1514 # From Steffen Thorsen (2012-10-25):
1515 # Yesterday the government in Jordan announced that they will not
1516 # switch back to standard time this winter, so the will stay on DST
1517 # until about the same time next year (at least).
1518 # http://www.petra.gov.jo/Public_News/Nws_NewsDetails.aspx?NewsID=88950
1520 # From Steffen Thorsen (2013-12-11):
1521 # Jordan Times and other sources say that Jordan is going back to
1522 # UTC+2 on 2013-12-19 at midnight:
1523 # http://jordantimes.com/govt-decides-to-switch-back-to-wintertime
1524 # Official, in Arabic:
1525 # http://www.petra.gov.jo/public_news/Nws_NewsDetails.aspx?Menu_ID=&Site_Id=2&lang=1&NewsID=133230&CatID=14
1526 # ... Our background/permalink about it
1527 # http://www.timeanddate.com/news/time/jordan-reverses-dst-decision.html
1529 # http://www.petra.gov.jo/Public_News/Nws_NewsDetails.aspx?lang=2&site_id=1&NewsID=133313&Type=P
1530 # ... says midnight for the coming one and 1:00 for the ones in the future
1531 # (and they will use DST again next year, using the normal schedule).
1533 # From Paul Eggert (2013-12-11):
1534 # As Steffen suggested, consider the past 21-month experiment to be DST.
1536 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1537 Rule Jordan 1973 only - Jun 6 0:00 1:00 S
1538 Rule Jordan 1973 1975 - Oct 1 0:00 0 -
1539 Rule Jordan 1974 1977 - May 1 0:00 1:00 S
1540 Rule Jordan 1976 only - Nov 1 0:00 0 -
1541 Rule Jordan 1977 only - Oct 1 0:00 0 -
1542 Rule Jordan 1978 only - Apr 30 0:00 1:00 S
1543 Rule Jordan 1978 only - Sep 30 0:00 0 -
1544 Rule Jordan 1985 only - Apr 1 0:00 1:00 S
1545 Rule Jordan 1985 only - Oct 1 0:00 0 -
1546 Rule Jordan 1986 1988 - Apr Fri>=1 0:00 1:00 S
1547 Rule Jordan 1986 1990 - Oct Fri>=1 0:00 0 -
1548 Rule Jordan 1989 only - May 8 0:00 1:00 S
1549 Rule Jordan 1990 only - Apr 27 0:00 1:00 S
1550 Rule Jordan 1991 only - Apr 17 0:00 1:00 S
1551 Rule Jordan 1991 only - Sep 27 0:00 0 -
1552 Rule Jordan 1992 only - Apr 10 0:00 1:00 S
1553 Rule Jordan 1992 1993 - Oct Fri>=1 0:00 0 -
1554 Rule Jordan 1993 1998 - Apr Fri>=1 0:00 1:00 S
1555 Rule Jordan 1994 only - Sep Fri>=15 0:00 0 -
1556 Rule Jordan 1995 1998 - Sep Fri>=15 0:00s 0 -
1557 Rule Jordan 1999 only - Jul 1 0:00s 1:00 S
1558 Rule Jordan 1999 2002 - Sep lastFri 0:00s 0 -
1559 Rule Jordan 2000 2001 - Mar lastThu 0:00s 1:00 S
1560 Rule Jordan 2002 2012 - Mar lastThu 24:00 1:00 S
1561 Rule Jordan 2003 only - Oct 24 0:00s 0 -
1562 Rule Jordan 2004 only - Oct 15 0:00s 0 -
1563 Rule Jordan 2005 only - Sep lastFri 0:00s 0 -
1564 Rule Jordan 2006 2011 - Oct lastFri 0:00s 0 -
1565 Rule Jordan 2013 only - Dec 20 0:00 0 -
1566 Rule Jordan 2014 max - Mar lastThu 24:00 1:00 S
1567 Rule Jordan 2014 max - Oct lastFri 0:00s 0 -
1568 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1569 Zone Asia/Amman 2:23:44 - LMT 1931
1575 # From Kazakhstan Embassy's News Bulletin No. 11
1576 # <http://www.kazsociety.org.uk/news/2005/03/30.htm> (2005-03-21):
1577 # The Government of Kazakhstan passed a resolution March 15 abolishing
1578 # daylight saving time citing lack of economic benefits and health
1579 # complications coupled with a decrease in productivity.
1581 # From Branislav Kojic (in Astana) via Gwillim Law (2005-06-28):
1582 # ... what happened was that the former Kazakhstan Eastern time zone
1583 # was "blended" with the Central zone. Therefore, Kazakhstan now has
1584 # two time zones, and difference between them is one hour. The zone
1585 # closer to UTC is the former Western zone (probably still called the
1586 # same), encompassing four provinces in the west: Aqtöbe, Atyraū,
1587 # Mangghystaū, and West Kazakhstan. The other zone encompasses
1588 # everything else.... I guess that would make Kazakhstan time zones
1589 # de jure UTC+5 and UTC+6 respectively.
1591 # From Stepan Golosunov (2016-03-27):
1592 # Review of the linked documents from http://adilet.zan.kz/
1593 # produced the following data for post-1991 Kazakhstan:
1595 # 0. Act of the Cabinet of Ministers of the USSR
1596 # from 1991-02-04 No. 20
1597 # http://pravo.gov.ru/proxy/ips/?docbody=&nd=102010545
1598 # removed the extra hour ("decree time") on the territory of the USSR
1599 # starting with the last Sunday of March 1991.
1600 # It also allowed (but not mandated) Kazakh SSR, Kirghiz SSR, Tajik SSR,
1601 # Turkmen SSR and Uzbek SSR to not have "summer" time.
1603 # The 1992-01-13 act also refers to the act of the Cabinet of Ministers
1604 # of the Kazakh SSR from 1991-03-20 No. 170 "About the act of the Cabinet
1605 # of Ministers of the USSR from 1991-02-04 No. 20" but I didn't found its
1608 # According to Izvestia newspaper No. 68 (23334) from 1991-03-20
1609 # (page 6; available at http://libinfo.org/newsr/newsr2574.djvu via
1610 # http://libinfo.org/index.php?id=58564) on 1991-03-31 at 2:00 during
1611 # transition to "summer" time:
1612 # Republic of Georgia, Latvian SSR, Lithuanian SSR, SSR Moldova,
1613 # Estonian SSR; Komi ASSR; Kaliningrad oblast; Nenets autonomous okrug
1614 # were to move clocks 1 hour forward.
1615 # Kazakh SSR (excluding Uralsk oblast); Republic of Kyrgyzstan, Tajik
1616 # SSR; Andijan, Jizzakh, Namangan, Sirdarya, Tashkent, Fergana oblasts
1617 # of the Uzbek SSR were to move clocks 1 hour backwards.
1618 # Other territories were to not move clocks.
1619 # When the "summer" time would end on 1991-09-29, clocks were to be
1620 # moved 1 hour backwards on the territory of the USSR excluding
1621 # Kazakhstan, Kirghizia, Uzbekistan, Turkmenia, Tajikistan.
1623 # Apparently there were last minute changes. Apparently Kazakh act No. 170
1624 # was one of such changes.
1626 # https://ru.wikipedia.org/wiki/Декретное время
1627 # claims that Sovetskaya Rossiya newspaper on 1991-03-29 published that
1628 # Nenets autonomous okrug, Komi and Kazakhstan (excluding Uralsk oblast)
1629 # were to not move clocks and Uralsk oblast was to move clocks
1630 # forward; on 1991-09-29 Kazakhstan was to move clocks backwards.
1631 # (Probably there were changes even after that publication. There is an
1632 # article claiming that Kaliningrad oblast decided on 1991-03-29 to not
1635 # This implies that on 1991-03-31 Asia/Oral remained on +04/+05 while
1636 # the rest of Kazakhstan switched from +06/+07 to +05/06 or from +05/06
1637 # to +04/+05. It's unclear how Qyzylorda oblast moved into the fifth
1638 # time belt. (By switching from +04/+05 to +05/+06 on 1991-09-29?) ...
1640 # 1. Act of the Cabinet of Ministers of the Republic of Kazakhstan
1641 # from 1992-01-13 No. 28
1642 # http://adilet.zan.kz/rus/docs/P920000028_
1643 # (text includes modification from the 1996 act)
1644 # introduced new rules for calculation of time, mirroring Russian
1645 # 1992-01-08 act. It specified that time would be calculated
1646 # according to time belts plus extra hour ("decree time"), moved clocks
1647 # on the whole territory of Kazakhstan 1 hour forward on 1992-01-19 at
1648 # 2:00, specified DST rules. It acknowledged that Kazakhstan was
1649 # located in the fourth and the fifth time belts and specified the
1650 # border between them to be located east of Qostanay and Aktyubinsk
1651 # oblasts (notably including Turgai and Qyzylorda oblasts into the fifth
1654 # This means switch on 1992-01-19 at 2:00 from +04/+05 to +05/+06 for
1655 # Asia/Aqtau, Asia/Aqtobe, Asia/Oral, Atyraū and Qostanay oblasts; from
1656 # +05/+06 to +06/+07 for Asia/Almaty and Asia/Qyzylorda (and Arkalyk)....
1658 # 2. Act of the Cabinet of Ministers of the Republic of Kazakhstan
1659 # from 1992-03-27 No. 284
1660 # http://adilet.zan.kz/rus/docs/P920000284_
1661 # cancels extra hour ("decree time") for Uralsk and Qyzylorda oblasts
1662 # since the last Sunday of March 1992, while keeping them in the fourth
1663 # and the fifth time belts respectively.
1665 # 3. Order of the Prime Minister of the Republic of Kazakhstan
1666 # from 1994-09-23 No. 384
1667 # http://adilet.zan.kz/rus/docs/R940000384_
1668 # cancels the extra hour ("decree time") on the territory of Mangghystaū
1669 # oblast since the last Sunday of September 1994 (saying that time on
1670 # the territory would correspond to the third time belt as a
1673 # 4. Act of the Government of the Republic of Kazakhstan
1674 # from 1996-05-08 No. 575
1675 # http://adilet.zan.kz/rus/docs/P960000575_
1676 # amends the 1992-01-13 act to end summer time in October instead
1677 # of September, mirroring identical Russian change from 1996-04-23 act.
1679 # 5. Act of the Government of the Republic of Kazakhstan
1680 # from 1999-03-26 No. 305
1681 # http://adilet.zan.kz/rus/docs/P990000305_
1682 # cancels the extra hour ("decree time") for Atyraū oblast since the
1683 # last Sunday of March 1999 while retaining the oblast in the fourth
1686 # This means change from +05/+06 to +04/+05....
1688 # 6. Act of the Government of the Republic of Kazakhstan
1689 # from 2000-11-23 No. 1749
1690 # http://adilet.zan.kz/rus/archive/docs/P000001749_/23.11.2000
1691 # replaces the previous five documents.
1693 # The only changes I noticed are in definition of the border between the
1694 # fourth and the fifth time belts. They account for changes in spelling
1695 # and administrative division (splitting of Turgai oblast in 1997
1696 # probably changed time in territories incorporated into Qostanay oblast
1697 # (including Arkalyk) from +06/+07 to +05/+06) and move Qyzylorda oblast
1698 # from being in the fifth time belt and not using decree time into the
1699 # fourth time belt (no change in practice).
1701 # 7. Act of the Government of the Republic of Kazakhstan
1702 # from 2003-12-29 No. 1342
1703 # http://adilet.zan.kz/rus/docs/P030001342_
1704 # modified the 2000-11-23 act. No relevant changes, apparently.
1706 # 8. Act of the Government of the Republic of Kazakhstan
1707 # from 2004-07-20 No. 775
1708 # http://adilet.zan.kz/rus/archive/docs/P040000775_/20.07.2004
1709 # modified the 2000-11-23 act to move Qostanay and Qyzylorda oblasts into
1710 # the fifth time belt and add Aktobe oblast to the list of regions not
1711 # using extra hour ("decree time"), leaving Kazakhstan with only 2 time
1712 # zones (+04/+05 and +06/+07). The changes were to be implemented
1713 # during DST transitions in 2004 and 2005 but the acts got radically
1714 # amended before implementation happened.
1716 # 9. Act of the Government of the Republic of Kazakhstan
1717 # from 2004-09-15 No. 1059
1718 # http://adilet.zan.kz/rus/docs/P040001059_
1719 # modified the 2000-11-23 act to remove exceptions from the "decree time"
1720 # (leaving Kazakhstan in +05/+06 and +06/+07 zones), amended the
1721 # 2004-07-20 act to implement changes for Atyraū, West Kazakhstan,
1722 # Qostanay, Qyzylorda and Mangghystaū oblasts by not moving clocks
1723 # during the 2004 transition to "winter" time.
1725 # This means transition from +04/+05 to +05/+06 for Atyraū oblast (no
1726 # zone currently), Asia/Oral, Asia/Aqtau and transition from +05/+06 to
1727 # +06/+07 for Qostanay oblast (Qostanay and Arkalyk, no zones currently)
1728 # and Asia/Qyzylorda on 2004-10-31 at 3:00....
1730 # 10. Act of the Government of the Republic of Kazakhstan
1731 # from 2005-03-15 No. 231
1732 # http://adilet.zan.kz/rus/docs/P050000231_
1733 # removes DST provisions from the 2000-11-23 act, removes most of the
1734 # (already implemented) provisions from the 2004-07-20 and 2004-09-15
1735 # acts, comes into effect 10 days after official publication.
1736 # The only practical effect seems to be the abolition of the summer
1739 # Unamended version of the act of the Government of the Russian Federation
1740 # No. 23 from 1992-01-08 [See 'europe' file for details].
1741 # Kazakh 1992-01-13 act appears to provide the same rules and 1992-03-27
1742 # act was to be enacted on the last Sunday of March 1992.
1744 # From Paul Eggert (2016-11-07):
1745 # The tables below reflect Golosunov's remarks, with exceptions as noted.
1747 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1749 # Almaty (formerly Alma-Ata), representing most locations in Kazakhstan
1750 # This includes KZ-AKM, KZ-ALA, KZ-ALM, KZ-AST, KZ-BAY, KZ-VOS, KZ-ZHA,
1751 # KZ-KAR, KZ-SEV, KZ-PAV, and KZ-YUZ.
1752 Zone Asia/Almaty 5:07:48 - LMT 1924 May 2 # or Alma-Ata
1753 5:00 - +05 1930 Jun 21
1754 6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s
1755 5:00 RussiaAsia +05/+06 1992 Jan 19 2:00s
1756 6:00 RussiaAsia +06/+07 2004 Oct 31 2:00s
1758 # Qyzylorda (aka Kyzylorda, Kizilorda, Kzyl-Orda, etc.) (KZ-KZY)
1759 # This currently includes Qostanay (aka Kostanay, Kustanay) (KZ-KUS);
1760 # see comments below.
1761 Zone Asia/Qyzylorda 4:21:52 - LMT 1924 May 2
1762 4:00 - +04 1930 Jun 21
1763 5:00 - +05 1981 Apr 1
1764 5:00 1:00 +06 1981 Oct 1
1765 6:00 - +06 1982 Apr 1
1766 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s
1767 4:00 RussiaAsia +04/+05 1991 Sep 29 2:00s
1768 5:00 RussiaAsia +05/+06 1992 Jan 19 2:00s
1769 6:00 RussiaAsia +06/+07 1992 Mar 29 2:00s
1770 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s
1772 # The following zone is like Asia/Qyzylorda except for being one
1773 # hour earlier from 1991-09-29 to 1992-03-29. The 1991/2 rules for
1774 # Qostenay are unclear partly because of the 1997 Turgai
1775 # reorganization, so this zone is commented out for now.
1776 #Zone Asia/Qostanay 4:14:20 - LMT 1924 May 2
1777 # 4:00 - +04 1930 Jun 21
1778 # 5:00 - +05 1981 Apr 1
1779 # 5:00 1:00 +06 1981 Oct 1
1780 # 6:00 - +06 1982 Apr 1
1781 # 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s
1782 # 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s
1783 # 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s
1786 # Aqtöbe (aka Aktobe, formerly Aktyubinsk) (KZ-AKT)
1787 Zone Asia/Aqtobe 3:48:40 - LMT 1924 May 2
1788 4:00 - +04 1930 Jun 21
1789 5:00 - +05 1981 Apr 1
1790 5:00 1:00 +06 1981 Oct 1
1791 6:00 - +06 1982 Apr 1
1792 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s
1793 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s
1794 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s
1796 # Mangghystaū (KZ-MAN)
1797 # Aqtau was not founded until 1963, but it represents an inhabited region,
1798 # so include time stamps before 1963.
1799 Zone Asia/Aqtau 3:21:04 - LMT 1924 May 2
1800 4:00 - +04 1930 Jun 21
1801 5:00 - +05 1981 Oct 1
1802 6:00 - +06 1982 Apr 1
1803 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s
1804 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s
1805 5:00 RussiaAsia +05/+06 1994 Sep 25 2:00s
1806 4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s
1808 # Atyraū (KZ-ATY) is like Mangghystaū except it switched from
1809 # +04/+05 to +05/+06 in spring 1999, not fall 1994.
1810 Zone Asia/Atyrau 3:27:44 - LMT 1924 May 2
1811 4:00 - +04 1930 Jun 21
1812 5:00 - +05 1981 Oct 1
1813 6:00 - +06 1982 Apr 1
1814 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s
1815 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s
1816 5:00 RussiaAsia +05/+06 1999 Mar 28 2:00s
1817 4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s
1819 # West Kazakhstan (KZ-ZAP)
1820 # From Paul Eggert (2016-03-18):
1821 # The 1989 transition is from USSR act No. 227 (1989-03-14).
1822 Zone Asia/Oral 3:25:24 - LMT 1924 May 2 # or Ural'sk
1823 4:00 - +04 1930 Jun 21
1824 5:00 - +05 1981 Apr 1
1825 5:00 1:00 +06 1981 Oct 1
1826 6:00 - +06 1982 Apr 1
1827 5:00 RussiaAsia +05/+06 1989 Mar 26 2:00s
1828 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s
1829 5:00 RussiaAsia +05/+06 1992 Mar 29 2:00s
1830 4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s
1833 # Kyrgyzstan (Kirgizstan)
1834 # Transitions through 1991 are from Shanks & Pottenger.
1836 # From Paul Eggert (2005-08-15):
1837 # According to an article dated today in the Kyrgyzstan Development Gateway
1838 # http://eng.gateway.kg/cgi-bin/page.pl?id=1&story_name=doc9979.shtml
1839 # Kyrgyzstan is canceling the daylight saving time system. I take the article
1840 # to mean that they will leave their clocks at 6 hours ahead of UTC.
1841 # From Malik Abdugaliev (2005-09-21):
1842 # Our government cancels daylight saving time 6th of August 2005.
1843 # From 2005-08-12 our GMT-offset is +6, w/o any daylight saving.
1845 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1846 Rule Kyrgyz 1992 1996 - Apr Sun>=7 0:00s 1:00 S
1847 Rule Kyrgyz 1992 1996 - Sep lastSun 0:00 0 -
1848 Rule Kyrgyz 1997 2005 - Mar lastSun 2:30 1:00 S
1849 Rule Kyrgyz 1997 2004 - Oct lastSun 2:30 0 -
1850 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1851 Zone Asia/Bishkek 4:58:24 - LMT 1924 May 2
1852 5:00 - +05 1930 Jun 21
1853 6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s
1854 5:00 RussiaAsia +05/+06 1991 Aug 31 2:00
1855 5:00 Kyrgyz +05/+06 2005 Aug 12
1858 ###############################################################################
1860 # Korea (North and South)
1862 # From Annie I. Bang (2006-07-10):
1863 # http://www.koreaherald.com/view.php?ud=200607100012
1864 # Korea ran a daylight saving program from 1949-61 but stopped it
1865 # during the 1950-53 Korean War. The system was temporarily enforced
1866 # between 1987 and 1988 ...
1868 # From Sanghyuk Jung (2014-10-29):
1869 # http://mm.icann.org/pipermail/tz/2014-October/021830.html
1870 # According to the Korean Wikipedia
1871 # http://ko.wikipedia.org/wiki/한국_표준시
1872 # [oldid=12896437 2014-09-04 08:03 UTC]
1873 # DST in Republic of Korea was as follows.... And I checked old
1874 # newspapers in Korean, all articles correspond with data in Wikipedia.
1875 # For example, the article in 1948 (Korean Language) proved that DST
1876 # started at June 1 in that year. For another example, the article in
1877 # 1988 said that DST started at 2:00 AM in that year.
1879 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1880 Rule ROK 1948 only - Jun 1 0:00 1:00 D
1881 Rule ROK 1948 only - Sep 13 0:00 0 S
1882 Rule ROK 1949 only - Apr 3 0:00 1:00 D
1883 Rule ROK 1949 1951 - Sep Sun>=8 0:00 0 S
1884 Rule ROK 1950 only - Apr 1 0:00 1:00 D
1885 Rule ROK 1951 only - May 6 0:00 1:00 D
1886 Rule ROK 1955 only - May 5 0:00 1:00 D
1887 Rule ROK 1955 only - Sep 9 0:00 0 S
1888 Rule ROK 1956 only - May 20 0:00 1:00 D
1889 Rule ROK 1956 only - Sep 30 0:00 0 S
1890 Rule ROK 1957 1960 - May Sun>=1 0:00 1:00 D
1891 Rule ROK 1957 1960 - Sep Sun>=18 0:00 0 S
1892 Rule ROK 1987 1988 - May Sun>=8 2:00 1:00 D
1893 Rule ROK 1987 1988 - Oct Sun>=8 3:00 0 S
1895 # From Paul Eggert (2016-08-23):
1896 # The Korean Wikipedia entry gives the following sources for UT offsets:
1898 # 1908: Official Journal Article No. 3994 (decree No. 5)
1899 # 1912: Governor-General of Korea Official Gazette Issue No. 367
1900 # (Announcement No. 338)
1901 # 1954: Presidential Decree No. 876 (1954-03-17)
1902 # 1961: Law No. 676 (1961-08-07)
1904 # (Another source "1987: Law No. 3919 (1986-12-31)" was in the 2014-10-30
1905 # edition of the Korean Wikipedia entry.)
1907 # I guessed that time zone abbreviations through 1945 followed the same
1908 # rules as discussed under Taiwan, with nominal switches from JST to KST
1909 # when the respective cities were taken over by the Allies after WWII.
1911 # For Pyongyang, guess no changes from World War II until 2015, as we
1912 # have no information otherwise.
1914 # From Steffen Thorsen (2015-08-07):
1915 # According to many news sources, North Korea is going to change to
1916 # the 8:30 time zone on August 15, one example:
1917 # http://www.bbc.com/news/world-asia-33815049
1919 # From Paul Eggert (2015-08-15):
1920 # Bells rang out midnight (00:00) Friday as part of the celebrations. See:
1921 # Talmadge E. North Korea celebrates new time zone, 'Pyongyang Time'
1922 # http://news.yahoo.com/north-korea-celebrates-time-zone-pyongyang-time-164038128.html
1923 # There is no common English-language abbreviation for this time zone.
1924 # Use KST, as that's what we already use for 1954-1961 in ROK.
1926 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1927 Zone Asia/Seoul 8:27:52 - LMT 1908 Apr 1
1928 8:30 - KST 1912 Jan 1
1929 9:00 - JCST 1937 Oct 1
1930 9:00 - JST 1945 Sep 8
1931 9:00 - KST 1954 Mar 21
1932 8:30 ROK K%sT 1961 Aug 10
1934 Zone Asia/Pyongyang 8:23:00 - LMT 1908 Apr 1
1935 8:30 - KST 1912 Jan 1
1936 9:00 - JCST 1937 Oct 1
1937 9:00 - JST 1945 Aug 24
1938 9:00 - KST 2015 Aug 15 00:00
1941 ###############################################################################
1951 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1952 Rule Lebanon 1920 only - Mar 28 0:00 1:00 S
1953 Rule Lebanon 1920 only - Oct 25 0:00 0 -
1954 Rule Lebanon 1921 only - Apr 3 0:00 1:00 S
1955 Rule Lebanon 1921 only - Oct 3 0:00 0 -
1956 Rule Lebanon 1922 only - Mar 26 0:00 1:00 S
1957 Rule Lebanon 1922 only - Oct 8 0:00 0 -
1958 Rule Lebanon 1923 only - Apr 22 0:00 1:00 S
1959 Rule Lebanon 1923 only - Sep 16 0:00 0 -
1960 Rule Lebanon 1957 1961 - May 1 0:00 1:00 S
1961 Rule Lebanon 1957 1961 - Oct 1 0:00 0 -
1962 Rule Lebanon 1972 only - Jun 22 0:00 1:00 S
1963 Rule Lebanon 1972 1977 - Oct 1 0:00 0 -
1964 Rule Lebanon 1973 1977 - May 1 0:00 1:00 S
1965 Rule Lebanon 1978 only - Apr 30 0:00 1:00 S
1966 Rule Lebanon 1978 only - Sep 30 0:00 0 -
1967 Rule Lebanon 1984 1987 - May 1 0:00 1:00 S
1968 Rule Lebanon 1984 1991 - Oct 16 0:00 0 -
1969 Rule Lebanon 1988 only - Jun 1 0:00 1:00 S
1970 Rule Lebanon 1989 only - May 10 0:00 1:00 S
1971 Rule Lebanon 1990 1992 - May 1 0:00 1:00 S
1972 Rule Lebanon 1992 only - Oct 4 0:00 0 -
1973 Rule Lebanon 1993 max - Mar lastSun 0:00 1:00 S
1974 Rule Lebanon 1993 1998 - Sep lastSun 0:00 0 -
1975 Rule Lebanon 1999 max - Oct lastSun 0:00 0 -
1976 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1977 Zone Asia/Beirut 2:22:00 - LMT 1880
1981 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1982 Rule NBorneo 1935 1941 - Sep 14 0:00 0:20 TS # one-Third Summer
1983 Rule NBorneo 1935 1941 - Dec 14 0:00 0 -
1985 # peninsular Malaysia
1986 # taken from Mok Ly Yng (2003-10-30)
1987 # http://www.math.nus.edu.sg/aslaksen/teaching/timezone.html
1988 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1989 Zone Asia/Kuala_Lumpur 6:46:46 - LMT 1901 Jan 1
1990 6:55:25 - SMT 1905 Jun 1 # Singapore M.T.
1991 7:00 - MALT 1933 Jan 1 # Malaya Time
1992 7:00 0:20 MALST 1936 Jan 1
1993 7:20 - MALT 1941 Sep 1
1994 7:30 - MALT 1942 Feb 16
1995 9:00 - JST 1945 Sep 12
1996 7:30 - MALT 1982 Jan 1
1997 8:00 - MYT # Malaysia Time
1999 # From Paul Eggert (2014-08-12):
2000 # The data entries here are mostly from Shanks & Pottenger, but the 1942, 1945
2001 # and 1982 transition dates are from Mok Ly Yng.
2002 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2003 Zone Asia/Kuching 7:21:20 - LMT 1926 Mar
2004 7:30 - BORT 1933 # Borneo Time
2005 8:00 NBorneo BOR%sT 1942 Feb 16
2006 9:00 - JST 1945 Sep 12
2007 8:00 - BORT 1982 Jan 1
2011 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2012 Zone Indian/Maldives 4:54:00 - LMT 1880 # Male
2013 4:54:00 - MMT 1960 # Male Mean Time
2014 5:00 - MVT # Maldives Time
2018 # Shanks & Pottenger say that Mongolia has three time zones, but
2019 # The USNO (1995-12-21) and the CIA map Standard Time Zones of the World
2020 # (2005-03) both say that it has just one.
2022 # From Oscar van Vlijmen (1999-12-11):
2023 # General Information Mongolia
2024 # <http://www.mongoliatourism.gov.mn/general.htm> (1999-09)
2025 # "Time: Mongolia has two time zones. Three westernmost provinces of
2026 # Bayan-Ölgii, Uvs, and Hovd are one hour earlier than the capital city, and
2027 # the rest of the country follows the Ulaanbaatar time, which is UTC/GMT plus
2030 # From Rives McDow (1999-12-13):
2031 # Mongolia discontinued the use of daylight savings time in 1999; 1998
2032 # being the last year it was implemented. The dates of implementation I am
2033 # unsure of, but most probably it was similar to Russia, except for the time
2034 # of implementation may have been different....
2035 # Some maps in the past have indicated that there was an additional time
2036 # zone in the eastern part of Mongolia, including the provinces of Dornod,
2037 # Sükhbaatar, and possibly Khentii.
2039 # From Paul Eggert (1999-12-15):
2040 # Naming and spelling is tricky in Mongolia.
2041 # We'll use Hovd (also spelled Chovd and Khovd) to represent the west zone;
2042 # the capital of the Hovd province is sometimes called Hovd, sometimes Dund-Us,
2043 # and sometimes Jirgalanta (with variant spellings), but the name Hovd
2044 # is good enough for our purposes.
2046 # From Rives McDow (2001-05-13):
2047 # In addition to Mongolia starting daylight savings as reported earlier
2048 # (adopted DST on 2001-04-27 02:00 local time, ending 2001-09-28),
2049 # there are three time zones.
2051 # Provinces [at 7:00]: Bayan-Ölgii, Uvs, Khovd, Zavkhan, Govi-Altai
2052 # Provinces [at 8:00]: Khövsgöl, Bulgan, Arkhangai, Khentii, Töv,
2053 # Bayankhongor, Övörkhangai, Dundgovi, Dornogovi, Ömnögovi
2054 # Provinces [at 9:00]: Dornod, Sükhbaatar
2056 # [The province of Selenge is omitted from the above lists.]
2058 # From Ganbold Ts., Ulaanbaatar (2004-04-17):
2059 # Daylight saving occurs at 02:00 local time last Saturday of March.
2060 # It will change back to normal at 02:00 local time last Saturday of
2061 # September.... As I remember this rule was changed in 2001.
2063 # From Paul Eggert (2004-04-17):
2064 # For now, assume Rives McDow's informant got confused about Friday vs
2065 # Saturday, and that his 2001 dates should have 1 added to them.
2067 # From Paul Eggert (2005-07-26):
2068 # We have wildly conflicting information about Mongolia's time zones.
2069 # Bill Bonnet (2005-05-19) reports that the US Embassy in Ulaanbaatar says
2070 # there is only one time zone and that DST is observed, citing Microsoft
2071 # Windows XP as the source. Risto Nykänen (2005-05-16) reports that
2072 # travelmongolia.org says there are two time zones (UT +07, +08) with no DST.
2073 # Oscar van Vlijmen (2005-05-20) reports that the Mongolian Embassy in
2074 # Washington, DC says there are two time zones, with DST observed.
2076 # http://ubpost.mongolnews.mn/index.php?subaction=showcomments&id=1111634894&archive=&start_from=&ucat=1&
2077 # which also says that there is DST, and which has a comment by "Toddius"
2078 # (2005-03-31 06:05 +0700) saying "Mongolia actually has 3.5 time zones.
2079 # The West (OLGII) is +7 GMT, most of the country is ULAT is +8 GMT
2080 # and some Eastern provinces are +9 GMT but Sükhbaatar Aimag is SUHK +8.5 GMT.
2081 # The SUKH timezone is new this year, it is one of the few things the
2082 # parliament passed during the tumultuous winter session."
2083 # For now, let's ignore this information, until we have more confirmation.
2085 # From Ganbold Ts. (2007-02-26):
2086 # Parliament of Mongolia has just changed the daylight-saving rule in February.
2087 # They decided not to adopt daylight-saving time....
2088 # http://www.mongolnews.mn/index.php?module=unuudur&sec=view&id=15742
2090 # From Deborah Goldsmith (2008-03-30):
2091 # We received a bug report claiming that the tz database UTC offset for
2092 # Asia/Choibalsan (GMT+09:00) is incorrect, and that it should be GMT
2093 # +08:00 instead. Different sources appear to disagree with the tz
2094 # database on this, e.g.:
2096 # http://www.timeanddate.com/worldclock/city.html?n=1026
2097 # http://www.worldtimeserver.com/current_time_in_MN.aspx
2099 # both say GMT+08:00.
2101 # From Steffen Thorsen (2008-03-31):
2102 # eznis airways, which operates several domestic flights, has a flight
2104 # http://www.eznis.com/Container.jsp?id=112
2105 # (click the English flag for English)
2107 # There it appears that flights between Choibalsan and Ulaanbaatar arrive
2108 # about 1:35 - 1:50 hours later in local clock time, no matter the
2109 # direction, while Ulaanbaatar-Khovd takes 2 hours in the Eastern
2110 # direction and 3:35 back, which indicates that Ulaanbaatar and Khovd are
2111 # in different time zones (like we know about), while Choibalsan and
2112 # Ulaanbaatar are in the same time zone (correction needed).
2114 # From Arthur David Olson (2008-05-19):
2115 # Assume that Choibalsan is indeed offset by 8:00.
2116 # XXX--in the absence of better information, assume that transition
2117 # was at the start of 2008-03-31 (the day of Steffen Thorsen's report);
2118 # this is almost surely wrong.
2120 # From Ganbold Tsagaankhuu (2015-03-10):
2121 # It seems like yesterday Mongolian Government meeting has concluded to use
2122 # daylight saving time in Mongolia.... Starting at 2:00AM of last Saturday of
2123 # March 2015, daylight saving time starts. And 00:00AM of last Saturday of
2124 # September daylight saving time ends. Source:
2125 # http://zasag.mn/news/view/8969
2127 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2128 Rule Mongol 1983 1984 - Apr 1 0:00 1:00 S
2129 Rule Mongol 1983 only - Oct 1 0:00 0 -
2130 # Shanks & Pottenger and IATA SSIM say 1990s switches occurred at 00:00,
2131 # but McDow says the 2001 switches occurred at 02:00. Also, IATA SSIM
2132 # (1996-09) says 1996-10-25. Go with Shanks & Pottenger through 1998.
2134 # Shanks & Pottenger say that the Sept. 1984 through Sept. 1990 switches
2135 # in Choibalsan (more precisely, in Dornod and Sükhbaatar) took place
2136 # at 02:00 standard time, not at 00:00 local time as in the rest of
2137 # the country. That would be odd, and possibly is a result of their
2138 # correction of 02:00 (in the previous edition) not being done correctly
2139 # in the latest edition; so ignore it for now.
2141 Rule Mongol 1985 1998 - Mar lastSun 0:00 1:00 S
2142 Rule Mongol 1984 1998 - Sep lastSun 0:00 0 -
2143 # IATA SSIM (1999-09) says Mongolia no longer observes DST.
2144 Rule Mongol 2001 only - Apr lastSat 2:00 1:00 S
2145 Rule Mongol 2001 2006 - Sep lastSat 2:00 0 -
2146 Rule Mongol 2002 2006 - Mar lastSat 2:00 1:00 S
2147 Rule Mongol 2015 max - Mar lastSat 2:00 1:00 S
2148 Rule Mongol 2015 max - Sep lastSat 0:00 0 -
2150 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2151 # Hovd, a.k.a. Chovd, Dund-Us, Dzhargalant, Khovd, Jirgalanta
2152 Zone Asia/Hovd 6:06:36 - LMT 1905 Aug
2153 6:00 - HOVT 1978 # Hovd Time
2155 # Ulaanbaatar, a.k.a. Ulan Bataar, Ulan Bator, Urga
2156 Zone Asia/Ulaanbaatar 7:07:32 - LMT 1905 Aug
2157 7:00 - ULAT 1978 # Ulaanbaatar Time
2159 # Choibalsan, a.k.a. Bajan Tümen, Bajan Tumen, Chojbalsan,
2160 # Choybalsan, Sanbejse, Tchoibalsan
2161 Zone Asia/Choibalsan 7:38:00 - LMT 1905 Aug
2163 8:00 - ULAT 1983 Apr
2164 9:00 Mongol CHO%sT 2008 Mar 31 # Choibalsan Time
2168 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2169 Zone Asia/Kathmandu 5:41:16 - LMT 1920
2171 5:45 - NPT # Nepal Time
2178 # From Rives McDow (2002-03-13):
2179 # I have been advised that Pakistan has decided to adopt dst on a
2180 # TRIAL basis for one year, starting 00:01 local time on April 7, 2002
2181 # and ending at 00:01 local time October 6, 2002. This is what I was
2182 # told, but I believe that the actual time of change may be 00:00; the
2183 # 00:01 was to make it clear which day it was on.
2185 # From Paul Eggert (2002-03-15):
2186 # Jesper Nørgaard found this URL:
2187 # http://www.pak.gov.pk/public/news/app/app06_dec.htm
2188 # (dated 2001-12-06) which says that the Cabinet adopted a scheme "to
2189 # advance the clocks by one hour on the night between the first
2190 # Saturday and Sunday of April and revert to the original position on
2191 # 15th October each year". This agrees with McDow's 04-07 at 00:00,
2192 # but disagrees about the October transition, and makes it sound like
2193 # it's not on a trial basis. Also, the "between the first Saturday
2194 # and Sunday of April" phrase, if taken literally, means that the
2195 # transition takes place at 00:00 on the first Sunday on or after 04-02.
2197 # From Paul Eggert (2003-02-09):
2198 # DAWN <http://www.dawn.com/2002/10/06/top13.htm> reported on 2002-10-05
2199 # that 2002 DST ended that day at midnight. Go with McDow for now.
2201 # From Steffen Thorsen (2003-03-14):
2202 # According to http://www.dawn.com/2003/03/07/top15.htm
2203 # there will be no DST in Pakistan this year:
2205 # ISLAMABAD, March 6: Information and Media Development Minister Sheikh
2206 # Rashid Ahmed on Thursday said the cabinet had reversed a previous
2207 # decision to advance clocks by one hour in summer and put them back by
2208 # one hour in winter with the aim of saving light hours and energy.
2210 # The minister told a news conference that the experiment had rather
2211 # shown 8 per cent higher consumption of electricity.
2213 # From Alex Krivenyshev (2008-05-15):
2215 # Here is an article that Pakistan plan to introduce Daylight Saving Time
2216 # on June 1, 2008 for 3 months.
2218 # "... The federal cabinet on Wednesday announced a new conservation plan to
2219 # help reduce load shedding by approving the closure of commercial centres at
2220 # 9pm and moving clocks forward by one hour for the next three months. ...."
2222 # http://www.worldtimezone.net/dst_news/dst_news_pakistan01.html
2223 # http://www.dailytimes.com.pk/default.asp?page=2008%5C05%5C15%5Cstory_15-5-2008_pg1_4
2225 # From Arthur David Olson (2008-05-19):
2226 # XXX--midnight transitions is a guess; 2008 only is a guess.
2228 # From Alexander Krivenyshev (2008-08-28):
2229 # Pakistan government has decided to keep the watches one-hour advanced
2230 # for another 2 months - plan to return to Standard Time on October 31
2231 # instead of August 31.
2233 # http://www.worldtimezone.com/dst_news/dst_news_pakistan02.html
2234 # http://dailymailnews.com/200808/28/news/dmbrn03.html
2236 # From Alexander Krivenyshev (2009-04-08):
2237 # Based on previous media reports that "... proposed plan to
2238 # advance clocks by one hour from May 1 will cause disturbance
2239 # to the working schedules rather than bringing discipline in
2240 # official working."
2241 # http://www.thenews.com.pk/daily_detail.asp?id=171280
2243 # recent news that instead of May 2009 - Pakistan plan to
2244 # introduce DST from April 15, 2009
2246 # FYI: Associated Press Of Pakistan
2248 # Cabinet okays proposal to advance clocks by one hour from April 15
2249 # http://www.app.com.pk/en_/index.php?option=com_content&task=view&id=73043&Itemid=1
2250 # http://www.worldtimezone.com/dst_news/dst_news_pakistan05.html
2253 # The Federal Cabinet on Wednesday approved the proposal to
2254 # advance clocks in the country by one hour from April 15 to
2257 # From Steffen Thorsen (2009-09-17):
2258 # "The News International," Pakistan reports that: "The Federal
2259 # Government has decided to restore the previous time by moving the
2260 # clocks backward by one hour from October 1. A formal announcement to
2261 # this effect will be made after the Prime Minister grants approval in
2263 # http://www.thenews.com.pk/updates.asp?id=87168
2265 # From Alexander Krivenyshev (2009-09-28):
2266 # According to Associated Press Of Pakistan, it is confirmed that
2267 # Pakistan clocks across the country would be turned back by an hour from
2270 # "Clocks to go back one hour from 1 Oct"
2271 # http://www.app.com.pk/en_/index.php?option=com_content&task=view&id=86715&Itemid=2
2272 # http://www.worldtimezone.com/dst_news/dst_news_pakistan07.htm
2274 # From Steffen Thorsen (2009-09-29):
2275 # Now they seem to have changed their mind, November 1 is the new date:
2276 # http://www.thenews.com.pk/top_story_detail.asp?Id=24742
2277 # "The country's clocks will be reversed by one hour on November 1.
2278 # Officials of Federal Ministry for Interior told this to Geo News on
2281 # And more importantly, it seems that these dates will be kept every year:
2282 # "It has now been decided that clocks will be wound forward by one hour
2283 # on April 15 and reversed by an hour on November 1 every year without
2284 # obtaining prior approval, the officials added."
2286 # We have confirmed this year's end date with both with the Ministry of
2287 # Water and Power and the Pakistan Electric Power Company:
2288 # http://www.timeanddate.com/news/time/pakistan-ends-dst09.html
2290 # From Christoph Göhre (2009-10-01):
2291 # [T]he German Consulate General in Karachi reported me today that Pakistan
2292 # will go back to standard time on 1st of November.
2294 # From Steffen Thorsen (2010-03-26):
2295 # Steffen Thorsen wrote:
2296 # > On Thursday (2010-03-25) it was announced that DST would start in
2297 # > Pakistan on 2010-04-01.
2299 # > Then today, the president said that they might have to revert the
2300 # > decision if it is not supported by the parliament. So at the time
2301 # > being, it seems unclear if DST will be actually observed or not - but
2302 # > April 1 could be a more likely date than April 15.
2303 # Now, it seems that the decision to not observe DST in final:
2305 # "Govt Withdraws Plan To Advance Clocks"
2306 # http://www.apakistannews.com/govt-withdraws-plan-to-advance-clocks-172041
2308 # "People laud PM's announcement to end DST"
2309 # http://www.app.com.pk/en_/index.php?option=com_content&task=view&id=99374&Itemid=2
2311 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2312 Rule Pakistan 2002 only - Apr Sun>=2 0:00 1:00 S
2313 Rule Pakistan 2002 only - Oct Sun>=2 0:00 0 -
2314 Rule Pakistan 2008 only - Jun 1 0:00 1:00 S
2315 Rule Pakistan 2008 2009 - Nov 1 0:00 0 -
2316 Rule Pakistan 2009 only - Apr 15 0:00 1:00 S
2318 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2319 Zone Asia/Karachi 4:28:12 - LMT 1907
2321 5:30 1:00 IST 1945 Oct 15
2322 5:30 - IST 1951 Sep 30
2323 5:00 - KART 1971 Mar 26 # Karachi Time
2324 5:00 Pakistan PK%sT # Pakistan Time
2328 # From Amos Shapir (1998-02-15):
2330 # From 1917 until 1948-05-15, all of Palestine, including the parts now
2331 # known as the Gaza Strip and the West Bank, was under British rule.
2332 # Therefore the rules given for Israel for that period, apply there too...
2334 # The Gaza Strip was under Egyptian rule between 1948-05-15 until 1967-06-05
2335 # (except a short occupation by Israel from 1956-11 till 1957-03, but no
2336 # time zone was affected then). It was never formally annexed to Egypt,
2339 # The rest of Palestine was under Jordanian rule at that time, formally
2340 # annexed in 1950 as the West Bank (and the word "Trans" was dropped from
2341 # the country's previous name of "the Hashemite Kingdom of the
2342 # Trans-Jordan"). So the rules for Jordan for that time apply. Major
2343 # towns in that area are Nablus (Shchem), El-Halil (Hebron), Ramallah, and
2346 # Both areas were occupied by Israel in June 1967, but not annexed (except
2347 # for East Jerusalem). They were on Israel time since then; there might
2348 # have been a Military Governor's order about time zones, but I'm not aware
2349 # of any (such orders may have been issued semi-annually whenever summer
2350 # time was in effect, but maybe the legal aspect of time was just neglected).
2352 # The Palestinian Authority was established in 1993, and got hold of most
2353 # towns in the West Bank and Gaza by 1995. I know that in order to
2354 # demonstrate...independence, they have been switching to
2355 # summer time and back on a different schedule than Israel's, but I don't
2356 # know when this was started, or what algorithm is used (most likely the
2359 # To summarize, the table should probably look something like that:
2361 # Area \ when | 1918-1947 | 1948-1967 | 1967-1995 | 1996-
2362 # ------------+-----------+-----------+-----------+-----------
2363 # Israel | Zion | Zion | Zion | Zion
2364 # West bank | Zion | Jordan | Zion | Jordan
2365 # Gaza | Zion | Egypt | Zion | Jordan
2367 # I guess more info may be available from the PA's web page (if/when they
2370 # From Paul Eggert (2006-03-22):
2371 # Shanks & Pottenger write that Gaza did not observe DST until 1957, but go
2372 # with Shapir and assume that it observed DST from 1940 through 1947,
2373 # and that it used Jordanian rules starting in 1996.
2374 # We don't yet need a separate entry for the West Bank, since
2375 # the only differences between it and Gaza that we know about
2376 # occurred before our cutoff date of 1970.
2377 # However, as we get more information, we may need to add entries
2378 # for parts of the West Bank as they transitioned from Israel's rules
2379 # to Palestine's rules.
2381 # From IINS News Service - Israel - 1998-03-23 10:38:07 Israel time,
2382 # forwarded by Ephraim Silverberg:
2384 # Despite the fact that Israel changed over to daylight savings time
2385 # last week, the PLO Authority (PA) has decided not to turn its clocks
2386 # one-hour forward at this time. As a sign of independence from Israeli rule,
2387 # the PA has decided to implement DST in April.
2389 # From Paul Eggert (1999-09-20):
2390 # Daoud Kuttab writes in Holiday havoc
2391 # http://www.jpost.com/com/Archive/22.Apr.1999/Opinion/Article-2.html
2392 # (Jerusalem Post, 1999-04-22) that
2393 # the Palestinian National Authority changed to DST on 1999-04-15.
2394 # I vaguely recall that they switch back in October (sorry, forgot the source).
2395 # For now, let's assume that the spring switch was at 24:00,
2396 # and that they switch at 0:00 on the 3rd Fridays of April and October.
2398 # From Paul Eggert (2005-11-22):
2399 # Starting 2004 transitions are from Steffen Thorsen's web site timeanddate.com.
2401 # From Steffen Thorsen (2005-11-23):
2402 # A user from Gaza reported that Gaza made the change early because of
2403 # the Ramadan. Next year Ramadan will be even earlier, so I think
2404 # there is a good chance next year's end date will be around two weeks
2405 # earlier - the same goes for Jordan.
2407 # From Steffen Thorsen (2006-08-17):
2408 # I was informed by a user in Bethlehem that in Bethlehem it started the
2409 # same day as Israel, and after checking with other users in the area, I
2410 # was informed that they started DST one day after Israel. I was not
2411 # able to find any authoritative sources at the time, nor details if
2412 # Gaza changed as well, but presumed Gaza to follow the same rules as
2415 # From Steffen Thorsen (2006-09-26):
2416 # according to the Palestine News Network (2006-09-19):
2417 # http://english.pnn.ps/index.php?option=com_content&task=view&id=596&Itemid=5
2418 # > The Council of Ministers announced that this year its winter schedule
2419 # > will begin early, as of midnight Thursday. It is also time to turn
2420 # > back the clocks for winter. Friday will begin an hour late this week.
2421 # I guess it is likely that next year's date will be moved as well,
2422 # because of the Ramadan.
2424 # From Jesper Nørgaard Welen (2007-09-18):
2425 # According to Steffen Thorsen's web site the Gaza Strip and the rest of the
2426 # Palestinian territories left DST early on 13.th. of September at 2:00.
2428 # From Paul Eggert (2007-09-20):
2429 # My understanding is that Gaza and the West Bank disagree even over when
2430 # the weekend is (Thursday+Friday versus Friday+Saturday), so I'd be a bit
2431 # surprised if they agreed about DST. But for now, assume they agree.
2432 # For lack of better information, predict that future changes will be
2433 # the 2nd Thursday of September at 02:00.
2435 # From Alexander Krivenyshev (2008-08-28):
2436 # Here is an article, that Mideast running on different clocks at Ramadan.
2438 # Gaza Strip (as Egypt) ended DST at midnight Thursday (Aug 28, 2008), while
2439 # the West Bank will end Daylight Saving Time at midnight Sunday (Aug 31, 2008).
2441 # http://www.guardian.co.uk/world/feedarticle/7759001
2442 # http://www.abcnews.go.com/International/wireStory?id=5676087
2443 # http://www.worldtimezone.com/dst_news/dst_news_gazastrip01.html
2445 # From Alexander Krivenyshev (2009-03-26):
2446 # According to the Palestine News Network (arabic.pnn.ps), Palestinian
2447 # government decided to start Daylight Time on Thursday night March
2448 # 26 and continue until the night of 27 September 2009.
2451 # http://arabic.pnn.ps/index.php?option=com_content&task=view&id=50850
2453 # (English translation)
2454 # http://www.worldtimezone.com/dst_news/dst_news_westbank01.html
2456 # From Steffen Thorsen (2009-08-31):
2457 # Palestine's Council of Ministers announced that they will revert back to
2458 # winter time on Friday, 2009-09-04.
2461 # http://www.safa.ps/ara/?action=showdetail&seid=4158
2462 # (Palestinian press agency, Arabic),
2463 # Google translate: "Decided that the Palestinian government in Ramallah
2464 # headed by Salam Fayyad, the start of work in time for the winter of
2465 # 2009, starting on Friday approved the fourth delay Sept. clock sixty
2466 # minutes per hour as of Friday morning."
2468 # We are not sure if Gaza will do the same, last year they had a different
2469 # end date, we will keep this page updated:
2470 # http://www.timeanddate.com/news/time/westbank-gaza-dst-2009.html
2472 # From Alexander Krivenyshev (2009-09-02):
2473 # Seems that Gaza Strip will go back to Winter Time same date as West Bank.
2475 # According to Palestinian Ministry Of Interior, West Bank and Gaza Strip plan
2476 # to change time back to Standard time on September 4, 2009.
2478 # "Winter time unite the West Bank and Gaza"
2479 # (from Palestinian National Authority):
2480 # http://www.moi.gov.ps/en/?page=633167343250594025&nid=11505
2481 # http://www.worldtimezone.com/dst_news/dst_news_gazastrip02.html
2483 # From Alexander Krivenyshev (2010-03-19):
2484 # According to Voice of Palestine DST will last for 191 days, from March
2485 # 26, 2010 till "the last Sunday before the tenth day of Tishri
2486 # (October), each year" (October 03, 2010?)
2488 # http://palvoice.org/forums/showthread.php?t=245697
2490 # http://www.worldtimezone.com/dst_news/dst_news_westbank03.html
2492 # From Steffen Thorsen (2010-03-24):
2493 # ...Ma'an News Agency reports that Hamas cabinet has decided it will
2494 # start one day later, at 12:01am. Not sure if they really mean 12:01am or
2497 # http://www.maannews.net/eng/ViewDetails.aspx?ID=271178
2498 # (Ma'an News Agency)
2499 # "At 12:01am Friday, clocks in Israel and the West Bank will change to
2500 # 1:01am, while Gaza clocks will change at 12:01am Saturday morning."
2502 # From Steffen Thorsen (2010-08-11):
2503 # According to several sources, including
2504 # http://www.maannews.net/eng/ViewDetails.aspx?ID=306795
2505 # the clocks were set back one hour at 2010-08-11 00:00:00 local time in
2506 # Gaza and the West Bank.
2507 # Some more background info:
2508 # http://www.timeanddate.com/news/time/westbank-gaza-end-dst-2010.html
2510 # From Steffen Thorsen (2011-08-26):
2511 # Gaza and the West Bank did go back to standard time in the beginning of
2512 # August, and will now enter daylight saving time again on 2011-08-30
2513 # 00:00 (so two periods of DST in 2011). The pause was because of
2516 # http://www.maannews.net/eng/ViewDetails.aspx?ID=416217
2518 # http://www.timeanddate.com/news/time/palestine-dst-2011.html
2520 # From Alexander Krivenyshev (2011-08-27):
2521 # According to the article in The Jerusalem Post:
2522 # "...Earlier this month, the Palestinian government in the West Bank decided to
2523 # move to standard time for 30 days, during Ramadan. The Palestinians in the
2524 # Gaza Strip accepted the change and also moved their clocks one hour back.
2525 # The Hamas government said on Saturday that it won't observe summertime after
2526 # the Muslim feast of Id al-Fitr, which begins on Tuesday..."
2528 # http://www.jpost.com/MiddleEast/Article.aspx?id=235650
2529 # http://www.worldtimezone.com/dst_news/dst_news_gazastrip05.html
2530 # The rules for Egypt are stolen from the 'africa' file.
2532 # From Steffen Thorsen (2011-09-30):
2533 # West Bank did end Daylight Saving Time this morning/midnight (2011-09-30
2535 # So West Bank and Gaza now have the same time again.
2537 # Many sources, including:
2538 # http://www.maannews.net/eng/ViewDetails.aspx?ID=424808
2540 # From Steffen Thorsen (2012-03-26):
2541 # Palestinian news sources tell that both Gaza and West Bank will start DST
2542 # on Friday (Thursday midnight, 2012-03-29 24:00).
2543 # Some of many sources in Arabic:
2544 # http://www.samanews.com/index.php?act=Show&id=122638
2546 # http://safa.ps/details/news/74352/%D8%A8%D8%AF%D8%A1-%D8%A7%D9%84%D8%AA%D9%88%D9%82%D9%8A%D8%AA-%D8%A7%D9%84%D8%B5%D9%8A%D9%81%D9%8A-%D8%A8%D8%A7%D9%84%D8%B6%D9%81%D8%A9-%D9%88%D8%BA%D8%B2%D8%A9-%D9%84%D9%8A%D9%84%D8%A9-%D8%A7%D9%84%D8%AC%D9%85%D8%B9%D8%A9.html
2548 # Our brief summary:
2549 # http://www.timeanddate.com/news/time/gaza-west-bank-dst-2012.html
2551 # From Steffen Thorsen (2013-03-26):
2552 # The following news sources tells that Palestine will "start daylight saving
2553 # time from midnight on Friday, March 29, 2013" (translated).
2554 # [These are in Arabic and are for Gaza and for Ramallah, respectively.]
2555 # http://www.samanews.com/index.php?act=Show&id=154120
2556 # http://safa.ps/details/news/99844/%D8%B1%D8%A7%D9%85-%D8%A7%D9%84%D9%84%D9%87-%D8%A8%D8%AF%D8%A1-%D8%A7%D9%84%D8%AA%D9%88%D9%82%D9%8A%D8%AA-%D8%A7%D9%84%D8%B5%D9%8A%D9%81%D9%8A-29-%D8%A7%D9%84%D8%AC%D8%A7%D8%B1%D9%8A.html
2558 # From Steffen Thorsen (2013-09-24):
2559 # The Gaza and West Bank are ending DST Thursday at midnight
2560 # (2013-09-27 00:00:00) (one hour earlier than last year...).
2561 # This source in English, says "that winter time will go into effect
2562 # at midnight on Thursday in the West Bank and Gaza Strip":
2563 # http://english.wafa.ps/index.php?action=detail&id=23246
2564 # official source...:
2565 # http://www.palestinecabinet.gov.ps/ar/Views/ViewDetails.aspx?pid=1252
2567 # From Steffen Thorsen (2015-03-03):
2568 # Sources such as http://www.alquds.com/news/article/view/id/548257
2569 # and http://www.raya.ps/ar/news/890705.html say Palestine areas will
2570 # start DST on 2015-03-28 00:00 which is one day later than expected.
2572 # From Paul Eggert (2015-03-03):
2573 # http://www.timeanddate.com/time/change/west-bank/ramallah?year=2014
2574 # says that the fall 2014 transition was Oct 23 at 24:00.
2576 # From Hannah Kreitem (2016-03-09):
2577 # http://www.palestinecabinet.gov.ps/WebSite/ar/ViewDetails?ID=31728
2578 # [Google translation]: "The Council also decided to start daylight
2579 # saving in Palestine as of one o'clock on Saturday morning,
2580 # 2016-03-26, to provide the clock 60 minutes ahead."
2582 # From Paul Eggert (2016-03-12):
2583 # Predict spring transitions on March's last Saturday at 01:00 from now on.
2585 # From Sharef Mustafa (2016-10-19):
2586 # [T]he Palestinian cabinet decision (Mar 8th 2016) published on
2587 # http://www.palestinecabinet.gov.ps/WebSite/Upload/Decree/GOV_17/16032016134830.pdf
2588 # states that summer time will end on Oct 29th at 01:00.
2590 # From Tim Parenti (2016-10-19):
2591 # Predict fall transitions on October's last Saturday at 01:00 from now on.
2592 # This is consistent with the 2016 transition as well as our spring
2595 # From Paul Eggert (2016-10-19):
2596 # It's also consistent with predictions in the following URLs today:
2597 # http://www.timeanddate.com/time/change/gaza-strip/gaza
2598 # http://www.timeanddate.com/time/change/west-bank/hebron
2600 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2601 Rule EgyptAsia 1957 only - May 10 0:00 1:00 S
2602 Rule EgyptAsia 1957 1958 - Oct 1 0:00 0 -
2603 Rule EgyptAsia 1958 only - May 1 0:00 1:00 S
2604 Rule EgyptAsia 1959 1967 - May 1 1:00 1:00 S
2605 Rule EgyptAsia 1959 1965 - Sep 30 3:00 0 -
2606 Rule EgyptAsia 1966 only - Oct 1 3:00 0 -
2608 Rule Palestine 1999 2005 - Apr Fri>=15 0:00 1:00 S
2609 Rule Palestine 1999 2003 - Oct Fri>=15 0:00 0 -
2610 Rule Palestine 2004 only - Oct 1 1:00 0 -
2611 Rule Palestine 2005 only - Oct 4 2:00 0 -
2612 Rule Palestine 2006 2007 - Apr 1 0:00 1:00 S
2613 Rule Palestine 2006 only - Sep 22 0:00 0 -
2614 Rule Palestine 2007 only - Sep Thu>=8 2:00 0 -
2615 Rule Palestine 2008 2009 - Mar lastFri 0:00 1:00 S
2616 Rule Palestine 2008 only - Sep 1 0:00 0 -
2617 Rule Palestine 2009 only - Sep Fri>=1 1:00 0 -
2618 Rule Palestine 2010 only - Mar 26 0:00 1:00 S
2619 Rule Palestine 2010 only - Aug 11 0:00 0 -
2620 Rule Palestine 2011 only - Apr 1 0:01 1:00 S
2621 Rule Palestine 2011 only - Aug 1 0:00 0 -
2622 Rule Palestine 2011 only - Aug 30 0:00 1:00 S
2623 Rule Palestine 2011 only - Sep 30 0:00 0 -
2624 Rule Palestine 2012 2014 - Mar lastThu 24:00 1:00 S
2625 Rule Palestine 2012 only - Sep 21 1:00 0 -
2626 Rule Palestine 2013 only - Sep Fri>=21 0:00 0 -
2627 Rule Palestine 2014 2015 - Oct Fri>=21 0:00 0 -
2628 Rule Palestine 2015 only - Mar lastFri 24:00 1:00 S
2629 Rule Palestine 2016 max - Mar lastSat 1:00 1:00 S
2630 Rule Palestine 2016 max - Oct lastSat 1:00 0 -
2632 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2633 Zone Asia/Gaza 2:17:52 - LMT 1900 Oct
2634 2:00 Zion EET/EEST 1948 May 15
2635 2:00 EgyptAsia EE%sT 1967 Jun 5
2637 2:00 Jordan EE%sT 1999
2638 2:00 Palestine EE%sT 2008 Aug 29 0:00
2640 2:00 Palestine EE%sT 2010
2641 2:00 - EET 2010 Mar 27 0:01
2642 2:00 Palestine EE%sT 2011 Aug 1
2644 2:00 Palestine EE%sT
2646 Zone Asia/Hebron 2:20:23 - LMT 1900 Oct
2647 2:00 Zion EET/EEST 1948 May 15
2648 2:00 EgyptAsia EE%sT 1967 Jun 5
2650 2:00 Jordan EE%sT 1999
2651 2:00 Palestine EE%sT
2657 # On 1844-08-16, Narciso Clavería, governor-general of the
2658 # Philippines, issued a proclamation announcing that 1844-12-30 was to
2659 # be immediately followed by 1845-01-01; see R.H. van Gent's
2660 # History of the International Date Line
2661 # http://www.staff.science.uu.nl/~gent0113/idl/idl_philippines.htm
2662 # The rest of the data entries are from Shanks & Pottenger.
2664 # From Jesper Nørgaard Welen (2006-04-26):
2665 # ... claims that Philippines had DST last time in 1990:
2666 # http://story.philippinetimes.com/p.x/ct/9/id/145be20cc6b121c0/cid/3e5bbccc730d258c/
2667 # [a story dated 2006-04-25 by Cris Larano of Dow Jones Newswires,
2670 # From Paul Eggert (2014-08-14):
2671 # The following source says DST may be instituted November-January and again
2672 # March-June, but this is not definite. It also says DST was last proclaimed
2673 # during the Ramos administration (1992-1998); but again, no details.
2674 # Carcamo D. PNoy urged to declare use of daylight saving time.
2675 # Philippine Star 2014-08-05
2676 # http://www.philstar.com/headlines/2014/08/05/1354152/pnoy-urged-declare-use-daylight-saving-time
2678 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2679 Rule Phil 1936 only - Nov 1 0:00 1:00 S
2680 Rule Phil 1937 only - Feb 1 0:00 0 -
2681 Rule Phil 1954 only - Apr 12 0:00 1:00 S
2682 Rule Phil 1954 only - Jul 1 0:00 0 -
2683 Rule Phil 1978 only - Mar 22 0:00 1:00 S
2684 Rule Phil 1978 only - Sep 21 0:00 0 -
2685 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2686 Zone Asia/Manila -15:56:00 - LMT 1844 Dec 31
2687 8:04:00 - LMT 1899 May 11
2688 8:00 Phil PH%sT 1942 May
2693 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2694 Zone Asia/Qatar 3:26:08 - LMT 1920 # Al Dawhah / Doha
2697 Link Asia/Qatar Asia/Bahrain
2701 # From Paul Eggert (2014-07-15):
2702 # Time in Saudi Arabia and other countries in the Arabian peninsula was not
2703 # standardized until relatively recently; we don't know when, and possibly it
2704 # has never been made official. Richard P Hunt, in "Islam city yielding to
2705 # modern times", New York Times (1961-04-09), p 20, wrote that only airlines
2706 # observed standard time, and that people in Jeddah mostly observed quasi-solar
2707 # time, doing so by setting their watches at sunrise to 6 o'clock (or to 12
2708 # o'clock for "Arab" time).
2710 # The TZ database cannot represent quasi-solar time; airline time is the best
2711 # we can do. The 1946 foreign air news digest of the U.S. Civil Aeronautics
2712 # Board (OCLC 42299995) reported that the "... Arabian Government, inaugurated
2713 # a weekly Dhahran-Cairo service, via the Saudi Arabian cities of Riyadh and
2714 # Jidda, on March 14, 1947". Shanks & Pottenger guessed 1950; go with the
2717 # Shanks & Pottenger also state that until 1968-05-01 Saudi Arabia had two
2718 # time zones; the other zone, at UT +04, was in the far eastern part of
2719 # the country. Ignore this, as it's before our 1970 cutoff.
2721 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2722 Zone Asia/Riyadh 3:06:52 - LMT 1947 Mar 14
2724 Link Asia/Riyadh Asia/Aden # Yemen
2725 Link Asia/Riyadh Asia/Kuwait
2728 # taken from Mok Ly Yng (2003-10-30)
2729 # http://www.math.nus.edu.sg/aslaksen/teaching/timezone.html
2730 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2731 Zone Asia/Singapore 6:55:25 - LMT 1901 Jan 1
2732 6:55:25 - SMT 1905 Jun 1 # Singapore M.T.
2733 7:00 - MALT 1933 Jan 1 # Malaya Time
2734 7:00 0:20 MALST 1936 Jan 1
2735 7:20 - MALT 1941 Sep 1
2736 7:30 - MALT 1942 Feb 16
2737 9:00 - JST 1945 Sep 12
2738 7:30 - MALT 1965 Aug 9 # independence
2739 7:30 - SGT 1982 Jan 1 # Singapore Time
2747 # From Paul Eggert (2013-02-21):
2748 # Milne says "Madras mean time use from May 1, 1898. Prior to this Colombo
2749 # mean time, 5h. 4m. 21.9s. F., was used." But 5:04:21.9 differs considerably
2750 # from Colombo's meridian 5:19:24, so for now ignore Milne and stick with
2751 # Shanks and Pottenger.
2753 # From Paul Eggert (1996-09-03):
2754 # "Sri Lanka advances clock by an hour to avoid blackout"
2755 # (<http://www.virtual-pc.com/lankaweb/news/items/240596-2.html>, 1996-05-24,
2756 # no longer available as of 1999-08-17)
2757 # reported "the country's standard time will be put forward by one hour at
2758 # midnight Friday (1830 GMT) 'in the light of the present power crisis'."
2760 # From Dharmasiri Senanayake, Sri Lanka Media Minister (1996-10-24), as quoted
2761 # by Shamindra in Daily News - Hot News Section
2762 # <news:54rka5$m5h@mtinsc01-mgt.ops.worldnet.att.net> (1996-10-26):
2763 # With effect from 12.30 a.m. on 26th October 1996
2764 # Sri Lanka will be six (06) hours ahead of GMT.
2766 # From Jesper Nørgaard Welen (2006-04-14), quoting Sri Lanka News Online
2767 # <http://news.sinhalaya.com/wmview.php?ArtID=11002> (2006-04-13):
2768 # 0030 hrs on April 15, 2006 (midnight of April 14, 2006 +30 minutes)
2769 # at present, become 2400 hours of April 14, 2006 (midnight of April 14, 2006).
2771 # From Peter Apps and Ranga Sirila of Reuters (2006-04-12) in:
2772 # http://today.reuters.co.uk/news/newsArticle.aspx?type=scienceNews&storyID=2006-04-12T172228Z_01_COL295762_RTRIDST_0_SCIENCE-SRILANKA-TIME-DC.XML
2773 # [The Tamil Tigers] never accepted the original 1996 time change and simply
2774 # kept their clocks set five and a half hours ahead of Greenwich Mean
2775 # Time (GMT), in line with neighbor India.
2776 # From Paul Eggert (2006-04-18):
2777 # People who live in regions under Tamil control can use [TZ='Asia/Kolkata'],
2778 # as that zone has agreed with the Tamil areas since our cutoff date of 1970.
2780 # From Sadika Sumanapala (2016-10-19):
2781 # According to http://www.sltime.org (maintained by Measurement Units,
2782 # Standards & Services Department, Sri Lanka) abbreviation for Sri Lanka
2783 # standard time is SLST.
2785 # From Paul Eggert (2016-10-18):
2786 # "SLST" seems to be reasonably recent and rarely-used outside time
2787 # zone nerd sources. I searched Google News and found three uses of
2788 # it in the International Business Times of India in February and
2789 # March of this year when discussing cricket match times, but nothing
2790 # since then (though there has been a lot of cricket) and nothing in
2791 # other English-language news sources. Our old abbreviation "LKT" is
2792 # even worse. For now, let's use a numeric abbreviation; we can
2793 # switch to "SLST" if it catches on.
2795 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2796 Zone Asia/Colombo 5:19:24 - LMT 1880
2797 5:19:32 - MMT 1906 # Moratuwa Mean Time
2798 5:30 - +0530 1942 Jan 5
2799 5:30 0:30 +0530/+06 1942 Sep
2800 5:30 1:00 +0530/+0630 1945 Oct 16 2:00
2801 5:30 - +0530 1996 May 25 0:00
2802 6:30 - +0630 1996 Oct 26 0:30
2803 6:00 - +06 2006 Apr 15 0:30
2807 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2808 Rule Syria 1920 1923 - Apr Sun>=15 2:00 1:00 S
2809 Rule Syria 1920 1923 - Oct Sun>=1 2:00 0 -
2810 Rule Syria 1962 only - Apr 29 2:00 1:00 S
2811 Rule Syria 1962 only - Oct 1 2:00 0 -
2812 Rule Syria 1963 1965 - May 1 2:00 1:00 S
2813 Rule Syria 1963 only - Sep 30 2:00 0 -
2814 Rule Syria 1964 only - Oct 1 2:00 0 -
2815 Rule Syria 1965 only - Sep 30 2:00 0 -
2816 Rule Syria 1966 only - Apr 24 2:00 1:00 S
2817 Rule Syria 1966 1976 - Oct 1 2:00 0 -
2818 Rule Syria 1967 1978 - May 1 2:00 1:00 S
2819 Rule Syria 1977 1978 - Sep 1 2:00 0 -
2820 Rule Syria 1983 1984 - Apr 9 2:00 1:00 S
2821 Rule Syria 1983 1984 - Oct 1 2:00 0 -
2822 Rule Syria 1986 only - Feb 16 2:00 1:00 S
2823 Rule Syria 1986 only - Oct 9 2:00 0 -
2824 Rule Syria 1987 only - Mar 1 2:00 1:00 S
2825 Rule Syria 1987 1988 - Oct 31 2:00 0 -
2826 Rule Syria 1988 only - Mar 15 2:00 1:00 S
2827 Rule Syria 1989 only - Mar 31 2:00 1:00 S
2828 Rule Syria 1989 only - Oct 1 2:00 0 -
2829 Rule Syria 1990 only - Apr 1 2:00 1:00 S
2830 Rule Syria 1990 only - Sep 30 2:00 0 -
2831 Rule Syria 1991 only - Apr 1 0:00 1:00 S
2832 Rule Syria 1991 1992 - Oct 1 0:00 0 -
2833 Rule Syria 1992 only - Apr 8 0:00 1:00 S
2834 Rule Syria 1993 only - Mar 26 0:00 1:00 S
2835 Rule Syria 1993 only - Sep 25 0:00 0 -
2836 # IATA SSIM (1998-02) says 1998-04-02;
2837 # (1998-09) says 1999-03-29 and 1999-09-29; (1999-02) says 1999-04-02,
2838 # 2000-04-02, and 2001-04-02; (1999-09) says 2000-03-31 and 2001-03-31;
2839 # (2006) says 2006-03-31 and 2006-09-22;
2840 # for now ignore all these claims and go with Shanks & Pottenger,
2841 # except for the 2006-09-22 claim (which seems right for Ramadan).
2842 Rule Syria 1994 1996 - Apr 1 0:00 1:00 S
2843 Rule Syria 1994 2005 - Oct 1 0:00 0 -
2844 Rule Syria 1997 1998 - Mar lastMon 0:00 1:00 S
2845 Rule Syria 1999 2006 - Apr 1 0:00 1:00 S
2846 # From Stephen Colebourne (2006-09-18):
2847 # According to IATA data, Syria will change DST on 21st September [21:00 UTC]
2848 # this year [only].... This is probably related to Ramadan, like Egypt.
2849 Rule Syria 2006 only - Sep 22 0:00 0 -
2850 # From Paul Eggert (2007-03-29):
2851 # Today the AP reported "Syria will switch to summertime at midnight Thursday."
2852 # http://www.iht.com/articles/ap/2007/03/29/africa/ME-GEN-Syria-Time-Change.php
2853 Rule Syria 2007 only - Mar lastFri 0:00 1:00 S
2854 # From Jesper Nørgaard (2007-10-27):
2855 # The sister center ICARDA of my work CIMMYT is confirming that Syria DST will
2856 # not take place 1st November at 0:00 o'clock but 1st November at 24:00 or
2857 # rather Midnight between Thursday and Friday. This does make more sense than
2858 # having it between Wednesday and Thursday (two workdays in Syria) since the
2859 # weekend in Syria is not Saturday and Sunday, but Friday and Saturday. So now
2860 # it is implemented at midnight of the last workday before weekend...
2862 # From Steffen Thorsen (2007-10-27):
2863 # Jesper Nørgaard Welen wrote:
2865 # > "Winter local time in Syria will be observed at midnight of Thursday 1
2866 # > November 2007, and the clock will be put back 1 hour."
2868 # I found confirmation on this in this gov.sy-article (Arabic):
2869 # http://wehda.alwehda.gov.sy/_print_veiw.asp?FileName=12521710520070926111247
2871 # which using Google's translate tools says:
2872 # Council of Ministers also approved the commencement of work on
2873 # identifying the winter time as of Friday, 2/11/2007 where the 60th
2874 # minute delay at midnight Thursday 1/11/2007.
2875 Rule Syria 2007 only - Nov Fri>=1 0:00 0 -
2877 # From Stephen Colebourne (2008-03-17):
2878 # For everyone's info, I saw an IATA time zone change for [Syria] for
2879 # this month (March 2008) in the last day or so....
2880 # Country Time Standard --- DST Start --- --- DST End --- DST
2881 # Name Zone Variation Time Date Time Date
2884 # Republic SY +0200 2200 03APR08 2100 30SEP08 +0300
2885 # 2200 02APR09 2100 30SEP09 +0300
2886 # 2200 01APR10 2100 30SEP10 +0300
2888 # From Arthur David Olson (2008-03-17):
2889 # Here's a link to English-language coverage by the Syrian Arab News
2891 # http://www.sana.sy/eng/21/2008/03/11/165173.htm
2892 # ...which reads (in part) "The Cabinet approved the suggestion of the
2893 # Ministry of Electricity to begin daylight savings time on Friday April
2894 # 4th, advancing clocks one hour ahead on midnight of Thursday April 3rd."
2895 # Since Syria is two hours east of UTC, the 2200 and 2100 transition times
2896 # shown above match up with midnight in Syria.
2898 # From Arthur David Olson (2008-03-18):
2899 # My best guess at a Syrian rule is "the Friday nearest April 1";
2900 # coding that involves either using a "Mar Fri>=29" construct that old time zone
2901 # compilers can't handle or having multiple Rules (a la Israel).
2902 # For now, use "Apr Fri>=1", and go with IATA on a uniform Sep 30 end.
2904 # From Steffen Thorsen (2008-10-07):
2905 # Syria has now officially decided to end DST on 2008-11-01 this year,
2906 # according to the following article in the Syrian Arab News Agency (SANA).
2908 # The article is in Arabic, and seems to tell that they will go back to
2909 # winter time on 2008-11-01 at 00:00 local daylight time (delaying/setting
2910 # clocks back 60 minutes).
2912 # http://sana.sy/ara/2/2008/10/07/195459.htm
2914 # From Steffen Thorsen (2009-03-19):
2915 # Syria will start DST on 2009-03-27 00:00 this year according to many sources,
2918 # http://www.sana.sy/eng/21/2009/03/17/217563.htm
2919 # (English, Syrian Arab News # Agency)
2920 # http://thawra.alwehda.gov.sy/_View_news2.asp?FileName=94459258720090318012209
2921 # (Arabic, gov-site)
2923 # We have not found any sources saying anything about when DST ends this year.
2926 # http://www.timeanddate.com/news/time/syria-dst-starts-march-27-2009.html
2928 # From Steffen Thorsen (2009-10-27):
2929 # The Syrian Arab News Network on 2009-09-29 reported that Syria will
2930 # revert back to winter (standard) time on midnight between Thursday
2931 # 2009-10-29 and Friday 2009-10-30:
2932 # http://www.sana.sy/ara/2/2009/09/29/247012.htm (Arabic)
2934 # From Arthur David Olson (2009-10-28):
2935 # We'll see if future DST switching times turn out to be end of the last
2936 # Thursday of the month or the start of the last Friday of the month or
2937 # something else. For now, use the start of the last Friday.
2939 # From Steffen Thorsen (2010-03-17):
2940 # The "Syrian News Station" reported on 2010-03-16 that the Council of
2941 # Ministers has decided that Syria will start DST on midnight Thursday
2942 # 2010-04-01: (midnight between Thursday and Friday):
2943 # http://sns.sy/sns/?path=news/read/11421 (Arabic)
2945 # From Steffen Thorsen (2012-03-26):
2946 # Today, Syria's government announced that they will start DST early on Friday
2947 # (00:00). This is a bit earlier than the past two years.
2949 # From Syrian Arab News Agency, in Arabic:
2950 # http://www.sana.sy/ara/2/2012/03/26/408215.htm
2952 # Our brief summary:
2953 # http://www.timeanddate.com/news/time/syria-dst-2012.html
2955 # From Arthur David Olson (2012-03-27):
2956 # Assume last Friday in March going forward XXX.
2958 Rule Syria 2008 only - Apr Fri>=1 0:00 1:00 S
2959 Rule Syria 2008 only - Nov 1 0:00 0 -
2960 Rule Syria 2009 only - Mar lastFri 0:00 1:00 S
2961 Rule Syria 2010 2011 - Apr Fri>=1 0:00 1:00 S
2962 Rule Syria 2012 max - Mar lastFri 0:00 1:00 S
2963 Rule Syria 2009 max - Oct lastFri 0:00 0 -
2965 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2966 Zone Asia/Damascus 2:25:12 - LMT 1920 # Dimashq
2970 # From Shanks & Pottenger.
2971 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2972 Zone Asia/Dushanbe 4:35:12 - LMT 1924 May 2
2973 5:00 - +05 1930 Jun 21
2974 6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s
2975 5:00 1:00 +05/+06 1991 Sep 9 2:00s
2979 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2980 Zone Asia/Bangkok 6:42:04 - LMT 1880
2981 6:42:04 - BMT 1920 Apr # Bangkok Mean Time
2983 Link Asia/Bangkok Asia/Phnom_Penh # Cambodia
2984 Link Asia/Bangkok Asia/Vientiane # Laos
2987 # From Shanks & Pottenger.
2988 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2989 Zone Asia/Ashgabat 3:53:32 - LMT 1924 May 2 # or Ashkhabad
2990 4:00 - +04 1930 Jun 21
2991 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00
2992 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00
2995 # United Arab Emirates
2996 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2997 Zone Asia/Dubai 3:41:12 - LMT 1920
2999 Link Asia/Dubai Asia/Muscat # Oman
3002 # Byalokoz 1919 says Uzbekistan was 4:27:53.
3003 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3004 Zone Asia/Samarkand 4:27:53 - LMT 1924 May 2
3005 4:00 - +04 1930 Jun 21
3006 5:00 - +05 1981 Apr 1
3007 5:00 1:00 +06 1981 Oct 1
3008 6:00 - +06 1982 Apr 1
3009 5:00 RussiaAsia +05/+06 1992
3011 # Milne says Tashkent was 4:37:10.8; round to nearest.
3012 Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2
3013 5:00 - +05 1930 Jun 21
3014 6:00 RussiaAsia +06/+07 1991 Mar 31 2:00
3015 5:00 RussiaAsia +05/+06 1992
3020 # From Paul Eggert (2014-10-04):
3021 # Milne gives 7:16:56 for the meridian of Saigon in 1899, as being
3022 # used in Lower Laos, Cambodia, and Annam. But this is quite a ways
3023 # from Saigon's location. For now, ignore this and stick with Shanks
3024 # and Pottenger for LMT before 1906.
3026 # From Arthur David Olson (2008-03-18):
3027 # The English-language name of Vietnam's most populous city is "Ho Chi Minh
3028 # City"; use Ho_Chi_Minh below to avoid a name of more than 14 characters.
3030 # From Paul Eggert (2014-10-21) after a heads-up from Trần Ngọc Quân:
3031 # Trần Tiến Bình's authoritative book "Lịch Việt Nam: thế kỷ XX-XXI (1901-2100)"
3032 # (Nhà xuất bản Văn Hoá - Thông Tin, Hanoi, 2005), pp 49-50,
3033 # is quoted verbatim in:
3034 # http://www.thoigian.com.vn/?mPage=P80D01
3035 # is translated by Brian Inglis in:
3036 # http://mm.icann.org/pipermail/tz/2014-October/021654.html
3037 # and is the basis for the information below.
3039 # The 1906 transition was effective July 1 and standardized Indochina to
3040 # Phù Liễn Observatory, legally 104 deg. 17'17" east of Paris.
3041 # It's unclear whether this meant legal Paris Mean Time (00:09:21) or
3042 # the Paris Meridian (2 deg. 20'14.03" E); the former yields 07:06:30.1333...
3043 # and the latter 07:06:29.333... so either way it rounds to 07:06:30,
3044 # which is used below even though the modern-day Phù Liễn Observatory
3045 # is closer to 07:06:31. Abbreviate Phù Liễn Mean Time as PLMT.
3047 # The following transitions occurred in Indochina in general (before 1954)
3048 # and in South Vietnam in particular (after 1954):
3049 # To 07:00 on 1911-05-01.
3050 # To 08:00 on 1942-12-31 at 23:00.
3051 # To 09:00 in 1945-03-14 at 23:00.
3052 # To 07:00 on 1945-09-02 in Vietnam.
3053 # To 08:00 on 1947-04-01 in French-controlled Indochina.
3054 # To 07:00 on 1955-07-01 in South Vietnam.
3055 # To 08:00 on 1959-12-31 at 23:00 in South Vietnam.
3056 # To 07:00 on 1975-06-13 in South Vietnam.
3058 # Trần cites the following sources; it's unclear which supplied the info above.
3060 # Hoàng Xuân Hãn: "Lịch và lịch Việt Nam". Tập san Khoa học Xã hội,
3061 # No. 9, Paris, February 1982.
3063 # Lê Thành Lân: "Lịch và niên biểu lịch sử hai mươi thế kỷ (0001-2010)",
3064 # NXB Thống kê, Hanoi, 2000.
3066 # Lê Thành Lân: "Lịch hai thế kỷ (1802-2010) và các lịch vĩnh cửu",
3067 # NXB Thuận Hoá, Huế, 1995.
3069 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3070 Zone Asia/Ho_Chi_Minh 7:06:40 - LMT 1906 Jul 1
3071 7:06:30 - PLMT 1911 May 1
3072 7:00 - ICT 1942 Dec 31 23:00
3073 8:00 - IDT 1945 Mar 14 23:00
3074 9:00 - JST 1945 Sep 2
3075 7:00 - ICT 1947 Apr 1
3076 8:00 - IDT 1955 Jul 1
3077 7:00 - ICT 1959 Dec 31 23:00
3078 8:00 - IDT 1975 Jun 13
projects / dragonfly.git / blob