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5:30 - KAST 1940 # Kashgar Time 5:00 - KAST 1980 May 8:00 PRC C%sT# Hong Kong (Xianggang)# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/SRule HK 1946 only - Apr 20 3:30 1:00 SRule HK 1946 only - Dec 1 3:30 0 -Rule HK 1947 only - Apr 13 3:30 1:00 SRule HK 1947 only - Dec 30 3:30 0 -Rule HK 1948 only - May 2 3:30 1:00 SRule HK 1948 1952 - Oct lastSun 3:30 0 -Rule HK 1949 1953 - Apr Sun>=1 3:30 1:00 SRule HK 1953 only - Nov 1 3:30 0 -Rule HK 1954 1964 - Mar Sun>=18 3:30 1:00 SRule HK 1954 only - Oct 31 3:30 0 -Rule HK 1955 1964 - Nov Sun>=1 3:30 0 -Rule HK 1965 1977 - Apr Sun>=16 3:30 1:00 SRule HK 1965 1977 - Oct Sun>=16 3:30 0 -Rule HK 1979 1980 - May Sun>=8 3:30 1:00 SRule HK 1979 1980 - Oct Sun>=16 3:30 0 -# Zone NAME GMTOFF RULES FORMAT [UNTIL]Zone Asia/Hong_Kong 7:36:36 - LMT 1904 Oct 30 8:00 HK HK%sT################################################################################ Taiwan# Shanks & Pottenger write that Taiwan observed DST during 1945, when it# was still controlled by Japan. This is hard to believe, but we don't# have any other information.# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/SRule Taiwan 1945 1951 - May 1 0:00 1:00 DRule Taiwan 1945 1951 - Oct 1 0:00 0 SRule Taiwan 1952 only - Mar 1 0:00 1:00 DRule Taiwan 1952 1954 - Nov 1 0:00 0 SRule Taiwan 1953 1959 - Apr 1 0:00 1:00 DRule Taiwan 1955 1961 - Oct 1 0:00 0 SRule Taiwan 1960 1961 - Jun 1 0:00 1:00 DRule Taiwan 1974 1975 - Apr 1 0:00 1:00 DRule Taiwan 1974 1975 - Oct 1 0:00 0 SRule Taiwan 1980 only - Jun 30 0:00 1:00 DRule Taiwan 1980 only - Sep 30 0:00 0 S# Zone NAME GMTOFF RULES FORMAT [UNTIL]Zone Asia/Taipei 8:06:00 - LMT 1896 # or Taibei or T'ai-pei 8:00 Taiwan C%sT# Macau (Macao, Aomen)# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/SRule Macau 1961 1962 - Mar Sun>=16 3:30 1:00 SRule Macau 1961 1964 - Nov Sun>=1 3:30 0 -Rule Macau 1963 only - Mar Sun>=16 0:00 1:00 SRule Macau 1964 only - Mar Sun>=16 3:30 1:00 SRule Macau 1965 only - Mar Sun>=16 0:00 1:00 SRule Macau 1965 only - Oct 31 0:00 0 -Rule Macau 1966 1971 - Apr Sun>=16 3:30 1:00 SRule Macau 1966 1971 - Oct Sun>=16 3:30 0 -Rule Macau 1972 1974 - Apr Sun>=15 0:00 1:00 SRule Macau 1972 1973 - Oct Sun>=15 0:00 0 -Rule Macau 1974 1977 - Oct Sun>=15 3:30 0 -Rule Macau 1975 1977 - Apr Sun>=15 3:30 1:00 SRule Macau 1978 1980 - Apr Sun>=15 0:00 1:00 SRule Macau 1978 1980 - Oct Sun>=15 0:00 0 -# Zone NAME GMTOFF RULES FORMAT [UNTIL]Zone Asia/Macau 7:34:20 - LMT 1912 8:00 Macau MO%sT 1999 Dec 20 # return to China 8:00 PRC C%sT################################################################################ Cyprus# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/SRule Cyprus 1975 only - Apr 13 0:00 1:00 SRule Cyprus 1975 only - Oct 12 0:00 0 -Rule Cyprus 1976 only - May 15 0:00 1:00 SRule Cyprus 1976 only - Oct 11 0:00 0 -Rule Cyprus 1977 1980 - Apr Sun>=1 0:00 1:00 SRule Cyprus 1977 only - Sep 25 0:00 0 -Rule Cyprus 1978 only - Oct 2 0:00 0 -Rule Cyprus 1979 1997 - Sep lastSun 0:00 0 -Rule Cyprus 1981 1998 - Mar lastSun 0:00 1:00 S# Zone NAME GMTOFF RULES FORMAT [UNTIL]Zone Asia/Nicosia 2:13:28 - LMT 1921 Nov 14 2:00 Cyprus EE%sT 1998 Sep 2:00 EUAsia EE%sT# IATA SSIM (1998-09) has Cyprus using EU rules for the first time.# Classically, Cyprus belongs to Asia; e.g. see Herodotus, Histories, I.72.# However, for various reasons many users expect to find it under Europe.Link Asia/Nicosia Europe/Nicosia# Georgia# From Paul Eggert (1994-11-19):# Today's _Economist_ (p 60) reports that Georgia moved its clocks forward# an hour recently, due to a law proposed by Zurab Murvanidze,# an MP who went on a hunger strike for 11 days to force discussion about it!# We have no details, but we'll guess they didn't move the clocks back in fall.## From Mathew Englander, quoting AP (1996-10-23 13:05-04):# Instead of putting back clocks at the end of October, Georgia# will stay on daylight savings time this winter to save energy,# President Eduard Shevardnadze decreed Wednesday.## From the BBC via Joseph S. Myers (2004-06-27):## Georgia moved closer to Western Europe on Sunday... The former Soviet# republic has changed its time zone back to that of Moscow. As a result it# is now just four hours ahead of Greenwich Mean Time, rather than five hours# ahead. The switch was decreed by the pro-Western president of Georgia,# Mikhail Saakashvili, who said the change was partly prompted by the process# of integration into Europe.# From Teimuraz Abashidze (2005-11-07):# Government of Georgia ... decided to NOT CHANGE daylight savings time on# [Oct.] 30, as it was done before during last more than 10 years.# Currently, we are in fact GMT +4:00, as before 30 October it was GMT# +3:00.... The problem is, there is NO FORMAL LAW or governmental document# about it. As far as I can find, I was told, that there is no document,# because we just DIDN'T ISSUE document about switching to winter time....# I don't know what can be done, especially knowing that some years ago our# DST rules where changed THREE TIMES during one month.# Zone NAME GMTOFF RULES FORMAT [UNTIL]Zone Asia/Tbilisi 2:59:16 - LMT 1880 2:59:16 - TBMT 1924 May 2 # Tbilisi Mean Time 3:00 - TBIT 1957 Mar # Tbilisi Time 4:00 RussiaAsia TBI%sT 1991 Mar 31 2:00s 3:00 1:00 TBIST 1991 Apr 9 # independence 3:00 RussiaAsia GE%sT 1992 # Georgia Time 3:00 E-EurAsia GE%sT 1994 Sep lastSun 4:00 E-EurAsia GE%sT 1996 Oct lastSun 4:00 1:00 GEST 1997 Mar lastSun 4:00 E-EurAsia GE%sT 2004 Jun 27 3:00 RussiaAsia GE%sT 2005 Mar lastSun 2:00 4:00 - GET# East Timor# See Indonesia for the 1945 transition.# From Joao Carrascalao, brother of the former governor of East Timor, in# <a href="http://etan.org/et99c/december/26-31/30ETMAY.htm"># East Timor may be late for its millennium# </a> (1999-12-26/31):# Portugal tried to change the time forward in 1974 because the sun# rises too early but the suggestion raised a lot of problems with the# Timorese and I still don't think it would work today because it# conflicts with their way of life.# From Paul Eggert (2000-12-04):# We don't have any record of the above attempt.# Most likely our records are incomplete, but we have no better data.# <a href="http://www.hri.org/news/world/undh/last/00-08-16.undh.html"># From Manoel de Almeida e Silva, Deputy Spokesman for the UN Secretary-General# (2000-08-16)</a>:# The Cabinet of the East Timor Transition Administration decided# today to advance East Timor's time by one hour. The time change,# which will be permanent, with no seasonal adjustment, will happen at# midnight on Saturday, September 16.# Zone NAME GMTOFF RULES FORMAT [UNTIL]Zone Asia/Dili 8:22:20 - LMT 1912 8:00 - TLT 1942 Feb 21 23:00 # E Timor Time 9:00 - JST 1945 Sep 23 9:00 - TLT 1976 May 3 8:00 - CIT 2000 Sep 17 00:00 9:00 - TLT# India# Zone NAME GMTOFF RULES FORMAT [UNTIL]Zone Asia/Kolkata 5:53:28 - LMT 1880 # Kolkata 5:53:20 - HMT 1941 Oct # Howrah Mean Time? 6:30 - BURT 1942 May 15 # Burma Time 5:30 - IST 1942 Sep 5:30 1:00 IST 1945 Oct 15 5:30 - IST# The following are like Asia/Kolkata:# Andaman Is# Lakshadweep (Laccadive, Minicoy and Amindivi Is)# Nicobar Is# Indonesia## From Gwillim Law (2001-05-28), overriding Shanks & Pottenger:# <http://www.sumatera-inc.com/go_to_invest/about_indonesia.asp#standtime># says that Indonesia's time zones changed on 1988-01-01. Looking at some# time zone maps, I think that must refer to Western Borneo (Kalimantan Barat# and Kalimantan Tengah) switching from UTC+8 to UTC+7.## From Paul Eggert (2007-03-10):# Here is another correction to Shanks & Pottenger.# JohnTWB writes that Japanese forces did not surrender control in# Indonesia until 1945-09-01 00:00 at the earliest (in Jakarta) and# other formal surrender ceremonies were September 9, 11, and 13, plus# September 12 for the regional surrender to Mountbatten in Singapore.# These would be the earliest possible times for a change.# Regimes horaires pour le monde entier, by Henri Le Corre, (Editions# Traditionnelles, 1987, Paris) says that Java and Madura switched# from JST to UTC+07:30 on 1945-09-23, and gives 1944-09-01 for Jayapura# (Hollandia). For now, assume all Indonesian locations other than Jayapura# switched on 1945-09-23.## Zone NAME GMTOFF RULES FORMAT [UNTIL]Zone Asia/Jakarta 7:07:12 - LMT 1867 Aug 10# Shanks & Pottenger say the next transition was at 1924 Jan 1 0:13,# but this must be a typo. 7:07:12 - JMT 1923 Dec 31 23:47:12 # Jakarta 7:20 - JAVT 1932 Nov # Java Time 7:30 - WIT 1942 Mar 23 9:00 - JST 1945 Sep 23 7:30 - WIT 1948 May 8:00 - WIT 1950 May 7:30 - WIT 1964 7:00 - WITZone Asia/Pontianak 7:17:20 - LMT 1908 May 7:17:20 - PMT 1932 Nov # Pontianak MT 7:30 - WIT 1942 Jan 29 9:00 - JST 1945 Sep 23 7:30 - WIT 1948 May 8:00 - WIT 1950 May 7:30 - WIT 1964 8:00 - CIT 1988 Jan 1 7:00 - WITZone Asia/Makassar 7:57:36 - LMT 1920 7:57:36 - MMT 1932 Nov # Macassar MT 8:00 - CIT 1942 Feb 9 9:00 - JST 1945 Sep 23 8:00 - CITZone Asia/Jayapura 9:22:48 - LMT 1932 Nov 9:00 - EIT 1944 Sep 1 9:30 - CST 1964 9:00 - EIT# Iran# From Roozbeh Pournader (2003-03-15):# This is an English translation of what I just found (originally in Persian).# The Gregorian dates in brackets are mine:## Official Newspaper No. 13548-1370/6/25 [1991-09-16]# No. 16760/T233 H 1370/6/10 [1991-09-01]## The Rule About Change of the Official Time of the Country## The Board of Ministers, in the meeting dated 1370/5/23 [1991-08-14],# based on the suggestion number 2221/D dated 1370/4/22 [1991-07-13]# of the Country's Organization for Official and Employment Affairs,# and referring to the law for equating the working hours of workers# and officers in the whole country dated 1359/4/23 [1980-07-14], and# for synchronizing the official times of the country, agreed that:## The official time of the country will should move forward one hour# at the 24[:00] hours of the first day of Farvardin and should return# to its previous state at the 24[:00] hours of the 30th day of# Shahrivar.## First Deputy to the President - Hassan Habibi## From personal experience, that agrees with what has been followed# for at least the last 5 years. Before that, for a few years, the# date used was the first Thursday night of Farvardin and the last# Thursday night of Shahrivar, but I can't give exact dates....# I have also changed the abbreviations to what is considered correct# here in Iran, IRST for regular time and IRDT for daylight saving time.## From Roozbeh Pournader (2005-04-05):# The text of the Iranian law, in effect since 1925, clearly mentions# that the true solar year is the measure, and there is no arithmetic# leap year calculation involved. There has never been any serious# plan to change that law....## From Paul Eggert (2006-03-22):# Go with Shanks & Pottenger before Sept. 1991, and with Pournader thereafter.# I used Ed Reingold's cal-persia in GNU Emacs 21.2 to check Persian dates,# stopping after 2037 when 32-bit time_t's overflow.# That cal-persia used Birashk's approximation, which disagrees with the solar# calendar predictions for the year 2025, so I corrected those dates by hand.## From Oscar van Vlijmen (2005-03-30), writing about future# discrepancies between cal-persia and the Iranian calendar:# For 2091 solar-longitude-after yields 2091-03-20 08:40:07.7 UT for# the vernal equinox and that gets so close to 12:00 some local# Iranian time that the definition of the correct location needs to be# known exactly, amongst other factors. 2157 is even closer:# 2157-03-20 08:37:15.5 UT. But the Gregorian year 2025 should give# no interpretation problem whatsoever. By the way, another instant# in the near future where there will be a discrepancy between# arithmetical and astronomical Iranian calendars will be in 2058:# vernal equinox on 2058-03-20 09:03:05.9 UT. The Java version of# Reingold's/Dershowitz' calculator gives correctly the Gregorian date# 2058-03-21 for 1 Farvardin 1437 (astronomical).## From Steffen Thorsen (2006-03-22):# Several of my users have reported that Iran will not observe DST anymore:# http://www.irna.ir/en/news/view/line-17/0603193812164948.htm## From Reuters (2007-09-16), with a heads-up from Jesper Norgaard Welen:# ... the Guardian Council ... approved a law on Sunday to re-introduce# daylight saving time ...# http://uk.reuters.com/article/oilRpt/idUKBLA65048420070916## From Roozbeh Pournader (2007-11-05):# This is quoted from Official Gazette of the Islamic Republic of# Iran, Volume 63, Number 18242, dated Tuesday 1386/6/24# [2007-10-16]. I am doing the best translation I can:...# The official time of the country will be moved forward for one hour# on the 24 hours of the first day of the month of Farvardin and will# be changed back to its previous state on the 24 hours of the# thirtieth day of Shahrivar.## Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
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