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*** 607,633 **** # and incorrect rules. Although the exact switch over time is missing, I # think 3:30 is correct. The official DST record for Hong Kong can be # obtained from # http://www.hko.gov.hk/gts/time/Summertime.htm ! # From Arthur David Olson (2009-10-28): # Here are the dates given at ! # http://www.hko.gov.hk/gts/time/Summertime.htm ! # as of 2009-10-28: # Year Period ! # 1941 1 Apr to 30 Sep # 1942 Whole year # 1943 Whole year # 1944 Whole year # 1945 Whole year # 1946 20 Apr to 1 Dec # 1947 13 Apr to 30 Dec # 1948 2 May to 31 Oct # 1949 3 Apr to 30 Oct # 1950 2 Apr to 29 Oct # 1951 1 Apr to 28 Oct ! # 1952 6 Apr to 25 Oct # 1953 5 Apr to 1 Nov # 1954 21 Mar to 31 Oct # 1955 20 Mar to 6 Nov # 1956 18 Mar to 4 Nov # 1957 24 Mar to 3 Nov --- 607,703 ---- # and incorrect rules. Although the exact switch over time is missing, I # think 3:30 is correct. The official DST record for Hong Kong can be # obtained from # http://www.hko.gov.hk/gts/time/Summertime.htm ! # From Phake Nick (2018-10-27): ! # According to Singaporean newspaper ! # http://eresources.nlb.gov.sg/newspapers/Digitised/Article/singfreepresswk19041102-1.2.37 ! # the day that Hong Kong start using GMT+8 should be Oct 30, 1904. ! # ! # From Paul Eggert (2018-11-17): ! # Hong Kong had a time ball near the Marine Police Station, Tsim Sha Tsui. ! # "The ball was raised manually each day and dropped at exactly 1pm ! # (except on Sundays and Government holidays)." ! # Dyson AD. From Time Ball to Atomic Clock. Hong Kong Government. 1983. ! # <https://www.hko.gov.hk/publica/gen_pub/timeball_atomic_clock.pdf> ! # "From 1904 October 30 the time-ball at Hong Kong has been dropped by order ! # of the Governor of the Colony at 17h 0m 0s G.M.T., which is 23m 18s.14 in ! # advance of 1h 0m 0s of Hong Kong mean time." ! # Hollis HP. Universal Time, Longitudes, and Geodesy. Mon Not R Astron Soc. ! # 1905-02-10;65(4):405-6. https://doi.org/10.1093/mnras/65.4.382 ! # ! # From Joseph Myers (2018-11-18): ! # An astronomer before 1925 referring to GMT would have been using the old ! # astronomical convention where the day started at noon, not midnight. ! # ! # From Steve Allen (2018-11-17): ! # Meteorological Observations made at the Hongkong Observatory in the year 1904 ! # page 4 <https://books.google.com/books?id=kgw5AQAAMAAJ&pg=RA4-PA4> ! # ... the log of drop times in Table II shows that on Sunday 1904-10-30 the ! # ball was dropped. So that looks like a special case drop for the sake ! # of broadcasting the new local time. ! # ! # From Phake Nick (2018-11-18): ! # According to The Hong Kong Weekly Press, 1904-10-29, p.324, the ! # governor of Hong Kong at the time stated that "We are further desired to ! # make it known that the change will be effected by firing the gun and by the ! # dropping of the Ball at 23min. 18sec. before one." ! # From Paul Eggert (2018-11-18): ! # See <https://mmis.hkpl.gov.hk> for this; unfortunately Flash is required. ! ! # From Phake Nick (2018-10-26): ! # I went to check microfilm records stored at Hong Kong Public Library.... ! # on September 30 1941, according to Ta Kung Pao (Hong Kong edition), it was ! # stated that fallback would occur on the next day (the 1st)'s "03:00 am (Hong ! # Kong Time 04:00 am)" and the clock will fall back for a half hour. (03:00 ! # probably refer to the time commonly used in mainland China at the time given ! # the paper's background) ... the sunrise/sunset time given by South China ! # Morning Post for October 1st was indeed moved by half an hour compares to ! # before. After that, in December, the battle to capture Hong Kong started and ! # the library doesn't seems to have any record stored about press during that ! # period of time. Some media resumed publication soon after that within the ! # same month, but there were not much information about time there. Later they ! # started including a radio program guide when they restored radio service, ! # explicitly mentioning it use Tokyo standard time, and later added a note ! # saying it's half an hour ahead of the old Hong Kong standard time, and it ! # also seems to indicate that Hong Kong was not using GMT+8 when it was ! # captured by Japan. ! # ! # Image of related sections on newspaper: ! # * 1941-09-30, Ta Kung Pao (Hong Kong), "Winter Time start tomorrow". ! # https://i.imgur.com/6waY51Z.jpg (Chinese) ! # * 1941-09-29, South China Morning Post, Information on sunrise/sunset ! # time and other things for September 30 and October 1. ! # https://i.imgur.com/kCiUR78.jpg ! # * 1942-02-05. The Hong Kong News, Radio Program Guide. ! # https://i.imgur.com/eVvDMzS.jpg ! # * 1941-06-14. Hong Kong Daily Press, Daylight Saving from 3am Tomorrow. ! # https://i.imgur.com/05KkvtC.png ! # * 1941-09-30, Hong Kong Daily Press, Winter Time Warning. ! # https://i.imgur.com/dge4kFJ.png ! # Also, the Liberation day of Hong Kong after WWII which British rule ! # over the territory resumed was August 30, 1945, which I think should ! # be the termination date for the use of JST in the territory.... ! ! # From Paul Eggert (2018-11-17): # Here are the dates given at ! # https://www.hko.gov.hk/gts/time/Summertime.htm ! # as of 2014-06-19: # Year Period ! # 1941 15 Jun to 30 Sep # 1942 Whole year # 1943 Whole year # 1944 Whole year # 1945 Whole year # 1946 20 Apr to 1 Dec # 1947 13 Apr to 30 Dec # 1948 2 May to 31 Oct # 1949 3 Apr to 30 Oct # 1950 2 Apr to 29 Oct # 1951 1 Apr to 28 Oct ! # 1952 6 Apr to 2 Nov # 1953 5 Apr to 1 Nov # 1954 21 Mar to 31 Oct # 1955 20 Mar to 6 Nov # 1956 18 Mar to 4 Nov # 1957 24 Mar to 3 Nov
*** 652,692 **** # 1976 18 Apr to 17 Oct # 1977 Nil # 1978 Nil # 1979 13 May to 21 Oct # 1980 to Now Nil ! # The page does not give start or end times of day. ! # The page does not give a start date for 1942. ! # The page does not givw an end date for 1945. ! # The Japanese occupation of Hong Kong began on 1941-12-25. ! # The Japanese surrender of Hong Kong was signed 1945-09-15. ! # For lack of anything better, use start of those days as the transition times. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S - Rule HK 1941 only - Apr 1 3:30 1:00 S - Rule HK 1941 only - Sep 30 3:30 0 - Rule HK 1946 only - Apr 20 3:30 1:00 S Rule HK 1946 only - Dec 1 3:30 0 - Rule HK 1947 only - Apr 13 3:30 1:00 S Rule HK 1947 only - Dec 30 3:30 0 - Rule HK 1948 only - May 2 3:30 1:00 S Rule HK 1948 1951 - Oct lastSun 3:30 0 - ! Rule HK 1952 only - Oct 25 3:30 0 - Rule HK 1949 1953 - Apr Sun>=1 3:30 1:00 S - Rule HK 1953 only - Nov 1 3:30 0 - Rule HK 1954 1964 - Mar Sun>=18 3:30 1:00 S Rule HK 1954 only - Oct 31 3:30 0 - Rule HK 1955 1964 - Nov Sun>=1 3:30 0 - Rule HK 1965 1976 - Apr Sun>=16 3:30 1:00 S Rule HK 1965 1976 - Oct Sun>=16 3:30 0 - Rule HK 1973 only - Dec 30 3:30 1:00 S Rule HK 1979 only - May Sun>=8 3:30 1:00 S Rule HK 1979 only - Oct Sun>=16 3:30 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] ! Zone Asia/Hong_Kong 7:36:42 - LMT 1904 Oct 30 ! 8:00 HK HK%sT 1941 Dec 25 ! 9:00 - JST 1945 Sep 15 8:00 HK HK%sT ############################################################################### # Taiwan --- 722,764 ---- # 1976 18 Apr to 17 Oct # 1977 Nil # 1978 Nil # 1979 13 May to 21 Oct # 1980 to Now Nil ! # The page does not give times of day for transitions, ! # or dates for the 1942 and 1945 transitions. ! # The Japanese occupation of Hong Kong began 1941-12-25. ! # The Japanese surrender of Hong Kong was signed 1945-09-16; see: ! # Heaver S. The days after the Pacific war ended: unsettling times ! # in Hong Kong. Post Magazine. 2016-06-13. ! # https://www.scmp.com/magazines/post-magazine/article/1852990/days-after-pacific-war-ended-unsettling-times-hong-kong ! # For lack of anything better, use start of those days as the ! # transition times. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule HK 1946 only - Apr 20 3:30 1:00 S Rule HK 1946 only - Dec 1 3:30 0 - Rule HK 1947 only - Apr 13 3:30 1:00 S Rule HK 1947 only - Dec 30 3:30 0 - Rule HK 1948 only - May 2 3:30 1:00 S Rule HK 1948 1951 - Oct lastSun 3:30 0 - ! Rule HK 1952 1953 - Nov Sun>=1 3:30 0 - Rule HK 1949 1953 - Apr Sun>=1 3:30 1:00 S Rule HK 1954 1964 - Mar Sun>=18 3:30 1:00 S Rule HK 1954 only - Oct 31 3:30 0 - Rule HK 1955 1964 - Nov Sun>=1 3:30 0 - Rule HK 1965 1976 - Apr Sun>=16 3:30 1:00 S Rule HK 1965 1976 - Oct Sun>=16 3:30 0 - Rule HK 1973 only - Dec 30 3:30 1:00 S Rule HK 1979 only - May Sun>=8 3:30 1:00 S Rule HK 1979 only - Oct Sun>=16 3:30 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] ! Zone Asia/Hong_Kong 7:36:42 - LMT 1904 Oct 30 0:36:42 ! 8:00 - HKT 1941 Jun 15 3:30 ! 8:00 1:00 HKST 1941 Oct 1 4:00 ! 8:30 - HKT 1941 Dec 25 ! 9:00 - JST 1945 Sep 16 8:00 HK HK%sT ############################################################################### # Taiwan
*** 1078,1087 **** --- 1150,1169 ---- 8:00 - +08 2000 Sep 17 0:00 9:00 - +09 # India + # British astronomer Henry Park Hollis disliked India Standard Time's offset: + # "A new time system has been proposed for India, Further India, and Burmah. + # The scheme suggested is that the times of the meridians 5½ and 6½ hours + # east of Greenwich should be adopted in these territories. No reason is + # given why hourly meridians five hours and six hours east should not be + # chosen; a plan which would bring the time of India into harmony with + # that of almost the whole of the civilised world." + # Hollis HP. Universal Time, Longitudes, and Geodesy. Mon Not R Astron Soc. + # 1905-02-10;65(4):405-6. https://doi.org/10.1093/mnras/65.4.382 + # From Ian P. Beacock, in "A brief history of (modern) time", The Atlantic # https://www.theatlantic.com/technology/archive/2015/12/the-creation-of-modern-time/421419/ # (2015-12-22): # In January 1906, several thousand cotton-mill workers rioted on the # outskirts of Bombay.... They were protesting the proposed abolition of
*** 1248,1263 **** # 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 --- 1330,1398 ---- # 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 (2018-11-30): # Go with Shanks & Pottenger before Sept. 1991, and with Pournader thereafter. ! # I used the following code in GNU Emacs 26.1 to generate the "Rule Iran" ! # lines from 2008 through 2087. Emacs 26.1 uses Ed Reingold's ! # cal-persia implementation of Birashk's approximation, which in the ! # 2008-2087 range disagrees with the the astronomical Persian calendar ! # for Persian years 1404 (Gregorian 2025) and 1437 (Gregorian 2058), ! # so the following code special-case those years. See Table 15.1, page 264, of: ! # Edward M. Reingold and Nachum Dershowitz, Calendrical Calculations: ! # The Ultimate Edition, Cambridge University Press (2018). ! # https://www.cambridge.org/fr/academic/subjects/computer-science/computing-general-interest/calendrical-calculations-ultimate-edition-4th-edition ! # Page 258, footnote 2, of this book says there is some dispute over what will ! # happen in 2091 (and some other years after that), so this code ! # stops in 2087, as 2088 and 2089 agree with the "max" rule below. ! # (cl-loop ! # initially (require 'cal-persia) ! # with first-persian-year = 1387 ! # with last-persian-year = 1466 ! # ;; Exceptional years in the above range, ! # ;; from Reingold & Dershowitz Table 15.1, page 264: ! # with exceptional-persian-years = '(1404 1437) ! # with range-start = nil ! # for persian-year from first-persian-year to last-persian-year ! # do ! # (let* ! # ((exceptional-year-offset ! # (if (member persian-year exceptional-persian-years) 1 0)) ! # (beg-dst-absolute ! # (+ (calendar-persian-to-absolute (list 1 1 persian-year)) ! # exceptional-year-offset)) ! # (end-dst-absolute ! # (+ (calendar-persian-to-absolute (list 6 30 persian-year)) ! # exceptional-year-offset)) ! # (next-year-beg-dst-absolute ! # (+ (calendar-persian-to-absolute (list 1 1 (1+ persian-year))) ! # (if (member (1+ persian-year) exceptional-persian-years) 1 0))) ! # (beg-dst (calendar-gregorian-from-absolute beg-dst-absolute)) ! # (end-dst (calendar-gregorian-from-absolute end-dst-absolute)) ! # (next-year-beg-dst (calendar-gregorian-from-absolute ! # next-year-beg-dst-absolute)) ! # (year (calendar-extract-year beg-dst)) ! # (range-end (if range-start year "only"))) ! # (setq range-start (or range-start year)) ! # (when (or (/= (calendar-extract-day beg-dst) ! # (calendar-extract-day next-year-beg-dst)) ! # (= persian-year last-persian-year)) ! # (insert ! # (format ! # "Rule\tIran\t%d\t%s\t-\t%s\t%2d\t24:00\t1:00\t-\n" ! # range-start range-end ! # (calendar-month-name (calendar-extract-month beg-dst) t) ! # (calendar-extract-day beg-dst))) ! # (insert ! # (format ! # "Rule\tIran\t%d\t%s\t-\t%s\t%2d\t24:00\t0\t-\n" ! # range-start range-end ! # (calendar-month-name (calendar-extract-month end-dst) t) ! # (calendar-extract-day end-dst))) ! # (setq range-start nil)))) # # 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
*** 1288,1352 **** # 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 ! Rule Iran 1978 1980 - Mar 21 0:00 1:00 - ! Rule Iran 1978 only - Oct 21 0:00 0 - ! Rule Iran 1979 only - Sep 19 0:00 0 - ! Rule Iran 1980 only - Sep 23 0:00 0 - ! Rule Iran 1991 only - May 3 0:00 1:00 - ! Rule Iran 1992 1995 - Mar 22 0:00 1:00 - ! Rule Iran 1991 1995 - Sep 22 0:00 0 - ! Rule Iran 1996 only - Mar 21 0:00 1:00 - ! Rule Iran 1996 only - Sep 21 0:00 0 - ! Rule Iran 1997 1999 - Mar 22 0:00 1:00 - ! Rule Iran 1997 1999 - Sep 22 0:00 0 - ! Rule Iran 2000 only - Mar 21 0:00 1:00 - ! Rule Iran 2000 only - Sep 21 0:00 0 - ! Rule Iran 2001 2003 - Mar 22 0:00 1:00 - ! Rule Iran 2001 2003 - Sep 22 0:00 0 - ! Rule Iran 2004 only - Mar 21 0:00 1:00 - ! Rule Iran 2004 only - Sep 21 0:00 0 - ! Rule Iran 2005 only - Mar 22 0:00 1:00 - ! Rule Iran 2005 only - Sep 22 0:00 0 - ! Rule Iran 2008 only - Mar 21 0:00 1:00 - ! Rule Iran 2008 only - Sep 21 0:00 0 - ! Rule Iran 2009 2011 - Mar 22 0:00 1:00 - ! Rule Iran 2009 2011 - Sep 22 0:00 0 - ! Rule Iran 2012 only - Mar 21 0:00 1:00 - ! Rule Iran 2012 only - Sep 21 0:00 0 - ! Rule Iran 2013 2015 - Mar 22 0:00 1:00 - ! Rule Iran 2013 2015 - Sep 22 0:00 0 - ! Rule Iran 2016 only - Mar 21 0:00 1:00 - ! Rule Iran 2016 only - Sep 21 0:00 0 - ! Rule Iran 2017 2019 - Mar 22 0:00 1:00 - ! Rule Iran 2017 2019 - Sep 22 0:00 0 - ! Rule Iran 2020 only - Mar 21 0:00 1:00 - ! Rule Iran 2020 only - Sep 21 0:00 0 - ! Rule Iran 2021 2023 - Mar 22 0:00 1:00 - ! Rule Iran 2021 2023 - Sep 22 0:00 0 - ! Rule Iran 2024 only - Mar 21 0:00 1:00 - ! Rule Iran 2024 only - Sep 21 0:00 0 - ! Rule Iran 2025 2027 - Mar 22 0:00 1:00 - ! Rule Iran 2025 2027 - Sep 22 0:00 0 - ! Rule Iran 2028 2029 - Mar 21 0:00 1:00 - ! Rule Iran 2028 2029 - Sep 21 0:00 0 - ! Rule Iran 2030 2031 - Mar 22 0:00 1:00 - ! Rule Iran 2030 2031 - Sep 22 0:00 0 - ! Rule Iran 2032 2033 - Mar 21 0:00 1:00 - ! Rule Iran 2032 2033 - Sep 21 0:00 0 - ! Rule Iran 2034 2035 - Mar 22 0:00 1:00 - ! Rule Iran 2034 2035 - Sep 22 0:00 0 - ! # ! # The following rules are approximations starting in the year 2038. ! # These are the best post-2037 approximations available, given the ! # restrictions of a single rule using a Gregorian-based data format. # At some point this table will need to be extended, though quite # possibly Iran will change the rules first. ! Rule Iran 2036 max - Mar 21 0:00 1:00 - ! Rule Iran 2036 max - Sep 21 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Tehran 3:25:44 - LMT 1916 3:25:44 - TMT 1946 # Tehran Mean Time 3:30 - +0330 1977 Nov --- 1423,1539 ---- # 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 ! Rule Iran 1978 1980 - Mar 20 24:00 1:00 - ! Rule Iran 1978 only - Oct 20 24:00 0 - ! Rule Iran 1979 only - Sep 18 24:00 0 - ! Rule Iran 1980 only - Sep 22 24:00 0 - ! Rule Iran 1991 only - May 2 24:00 1:00 - ! Rule Iran 1992 1995 - Mar 21 24:00 1:00 - ! Rule Iran 1991 1995 - Sep 21 24:00 0 - ! Rule Iran 1996 only - Mar 20 24:00 1:00 - ! Rule Iran 1996 only - Sep 20 24:00 0 - ! Rule Iran 1997 1999 - Mar 21 24:00 1:00 - ! Rule Iran 1997 1999 - Sep 21 24:00 0 - ! Rule Iran 2000 only - Mar 20 24:00 1:00 - ! Rule Iran 2000 only - Sep 20 24:00 0 - ! Rule Iran 2001 2003 - Mar 21 24:00 1:00 - ! Rule Iran 2001 2003 - Sep 21 24:00 0 - ! Rule Iran 2004 only - Mar 20 24:00 1:00 - ! Rule Iran 2004 only - Sep 20 24:00 0 - ! Rule Iran 2005 only - Mar 21 24:00 1:00 - ! Rule Iran 2005 only - Sep 21 24:00 0 - ! Rule Iran 2008 only - Mar 20 24:00 1:00 - ! Rule Iran 2008 only - Sep 20 24:00 0 - ! Rule Iran 2009 2011 - Mar 21 24:00 1:00 - ! Rule Iran 2009 2011 - Sep 21 24:00 0 - ! Rule Iran 2012 only - Mar 20 24:00 1:00 - ! Rule Iran 2012 only - Sep 20 24:00 0 - ! Rule Iran 2013 2015 - Mar 21 24:00 1:00 - ! Rule Iran 2013 2015 - Sep 21 24:00 0 - ! Rule Iran 2016 only - Mar 20 24:00 1:00 - ! Rule Iran 2016 only - Sep 20 24:00 0 - ! Rule Iran 2017 2019 - Mar 21 24:00 1:00 - ! Rule Iran 2017 2019 - Sep 21 24:00 0 - ! Rule Iran 2020 only - Mar 20 24:00 1:00 - ! Rule Iran 2020 only - Sep 20 24:00 0 - ! Rule Iran 2021 2023 - Mar 21 24:00 1:00 - ! Rule Iran 2021 2023 - Sep 21 24:00 0 - ! Rule Iran 2024 only - Mar 20 24:00 1:00 - ! Rule Iran 2024 only - Sep 20 24:00 0 - ! Rule Iran 2025 2027 - Mar 21 24:00 1:00 - ! Rule Iran 2025 2027 - Sep 21 24:00 0 - ! Rule Iran 2028 2029 - Mar 20 24:00 1:00 - ! Rule Iran 2028 2029 - Sep 20 24:00 0 - ! Rule Iran 2030 2031 - Mar 21 24:00 1:00 - ! Rule Iran 2030 2031 - Sep 21 24:00 0 - ! Rule Iran 2032 2033 - Mar 20 24:00 1:00 - ! Rule Iran 2032 2033 - Sep 20 24:00 0 - ! Rule Iran 2034 2035 - Mar 21 24:00 1:00 - ! Rule Iran 2034 2035 - Sep 21 24:00 0 - ! Rule Iran 2036 2037 - Mar 20 24:00 1:00 - ! Rule Iran 2036 2037 - Sep 20 24:00 0 - ! Rule Iran 2038 2039 - Mar 21 24:00 1:00 - ! Rule Iran 2038 2039 - Sep 21 24:00 0 - ! Rule Iran 2040 2041 - Mar 20 24:00 1:00 - ! Rule Iran 2040 2041 - Sep 20 24:00 0 - ! Rule Iran 2042 2043 - Mar 21 24:00 1:00 - ! Rule Iran 2042 2043 - Sep 21 24:00 0 - ! Rule Iran 2044 2045 - Mar 20 24:00 1:00 - ! Rule Iran 2044 2045 - Sep 20 24:00 0 - ! Rule Iran 2046 2047 - Mar 21 24:00 1:00 - ! Rule Iran 2046 2047 - Sep 21 24:00 0 - ! Rule Iran 2048 2049 - Mar 20 24:00 1:00 - ! Rule Iran 2048 2049 - Sep 20 24:00 0 - ! Rule Iran 2050 2051 - Mar 21 24:00 1:00 - ! Rule Iran 2050 2051 - Sep 21 24:00 0 - ! Rule Iran 2052 2053 - Mar 20 24:00 1:00 - ! Rule Iran 2052 2053 - Sep 20 24:00 0 - ! Rule Iran 2054 2055 - Mar 21 24:00 1:00 - ! Rule Iran 2054 2055 - Sep 21 24:00 0 - ! Rule Iran 2056 2057 - Mar 20 24:00 1:00 - ! Rule Iran 2056 2057 - Sep 20 24:00 0 - ! Rule Iran 2058 2059 - Mar 21 24:00 1:00 - ! Rule Iran 2058 2059 - Sep 21 24:00 0 - ! Rule Iran 2060 2062 - Mar 20 24:00 1:00 - ! Rule Iran 2060 2062 - Sep 20 24:00 0 - ! Rule Iran 2063 only - Mar 21 24:00 1:00 - ! Rule Iran 2063 only - Sep 21 24:00 0 - ! Rule Iran 2064 2066 - Mar 20 24:00 1:00 - ! Rule Iran 2064 2066 - Sep 20 24:00 0 - ! Rule Iran 2067 only - Mar 21 24:00 1:00 - ! Rule Iran 2067 only - Sep 21 24:00 0 - ! Rule Iran 2068 2070 - Mar 20 24:00 1:00 - ! Rule Iran 2068 2070 - Sep 20 24:00 0 - ! Rule Iran 2071 only - Mar 21 24:00 1:00 - ! Rule Iran 2071 only - Sep 21 24:00 0 - ! Rule Iran 2072 2074 - Mar 20 24:00 1:00 - ! Rule Iran 2072 2074 - Sep 20 24:00 0 - ! Rule Iran 2075 only - Mar 21 24:00 1:00 - ! Rule Iran 2075 only - Sep 21 24:00 0 - ! Rule Iran 2076 2078 - Mar 20 24:00 1:00 - ! Rule Iran 2076 2078 - Sep 20 24:00 0 - ! Rule Iran 2079 only - Mar 21 24:00 1:00 - ! Rule Iran 2079 only - Sep 21 24:00 0 - ! Rule Iran 2080 2082 - Mar 20 24:00 1:00 - ! Rule Iran 2080 2082 - Sep 20 24:00 0 - ! Rule Iran 2083 only - Mar 21 24:00 1:00 - ! Rule Iran 2083 only - Sep 21 24:00 0 - ! Rule Iran 2084 2086 - Mar 20 24:00 1:00 - ! Rule Iran 2084 2086 - Sep 20 24:00 0 - ! Rule Iran 2087 only - Mar 21 24:00 1:00 - ! Rule Iran 2087 only - Sep 21 24:00 0 - ! # ! # The following rules are approximations starting in the year 2088. ! # These are the best post-2088 approximations available, given the ! # restrictions of a single rule using ordinary Gregorian dates. # At some point this table will need to be extended, though quite # possibly Iran will change the rules first. ! Rule Iran 2088 max - Mar 20 24:00 1:00 - ! Rule Iran 2088 max - Sep 20 24:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Tehran 3:25:44 - LMT 1916 3:25:44 - TMT 1946 # Tehran Mean Time 3:30 - +0330 1977 Nov
*** 1454,1463 **** --- 1641,1668 ---- Rule Zion 1957 only - Sep 22 0:00 0 S Rule Zion 1974 only - Jul 7 0:00 1:00 D Rule Zion 1974 only - Oct 13 0:00 0 S Rule Zion 1975 only - Apr 20 0:00 1:00 D Rule Zion 1975 only - Aug 31 0:00 0 S + + # From Alois Treindl (2019-03-06): + # http://www.moin.gov.il/Documents/שעון קיץ/clock-50-years-7-2014.pdf + # From Isaac Starkman (2019-03-06): + # Summer time was in that period in 1980 and 1984, see + # https://www.ynet.co.il/articles/0,7340,L-3951073,00.html + # You can of course read it in translation. + # I checked the local newspapers for that years. + # It started on midnight and end at 01.00 am. + # From Paul Eggert (2019-03-06): + # Also see this thread about the moin.gov.il URL: + # https://mm.icann.org/pipermail/tz/2018-November/027194.html + Rule Zion 1980 only - Aug 2 0:00 1:00 D + Rule Zion 1980 only - Sep 13 1:00 0 S + Rule Zion 1984 only - May 5 0:00 1:00 D + Rule Zion 1984 only - Aug 25 1:00 0 S + + # From Shanks & Pottenger: Rule Zion 1985 only - Apr 14 0:00 1:00 D Rule Zion 1985 only - Sep 15 0:00 0 S Rule Zion 1986 only - May 18 0:00 1:00 D Rule Zion 1986 only - Sep 7 0:00 0 S Rule Zion 1987 only - Apr 15 0:00 1:00 D
*** 1712,1722 **** # https://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 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Tokyo 9:18:59 - LMT 1887 Dec 31 15:00u 9:00 Japan J%sT ! # Since 1938, all Japanese possessions have been like Asia/Tokyo. # Jordan # # From <http://star.arabia.com/990701/JO9.html> # Jordan Week (1999-07-01) via Steffen Thorsen (1999-09-09): --- 1917,1929 ---- # https://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 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Tokyo 9:18:59 - LMT 1887 Dec 31 15:00u 9:00 Japan J%sT ! # Since 1938, all Japanese possessions have been like Asia/Tokyo, ! # except that Truk (Chuuk), Ponape (Pohnpei), and Jaluit (Kosrae) did not ! # switch from +10 to +09 until 1941-04-01; see the 'australasia' file. # Jordan # # From <http://star.arabia.com/990701/JO9.html> # Jordan Week (1999-07-01) via Steffen Thorsen (1999-09-09):
*** 2002,2013 **** # [For Atyrau and Oral] 1919 decree # (http://www.worldtimezone.com/dst_news/dst_news_russia-1919-02-08.html # and in Byalokoz) lists Ural river (plus 10 versts on its left bank) in # the third time belt (before 1930 this means +03). ! # From Paul Eggert (2016-12-06): ! # The tables below reflect Golosunov's remarks, with exceptions as noted. # Zone NAME GMTOFF RULES FORMAT [UNTIL] # # Almaty (formerly Alma-Ata), representing most locations in Kazakhstan # This includes KZ-AKM, KZ-ALA, KZ-ALM, KZ-AST, KZ-BAY, KZ-VOS, KZ-ZHA, --- 2209,2222 ---- # [For Atyrau and Oral] 1919 decree # (http://www.worldtimezone.com/dst_news/dst_news_russia-1919-02-08.html # and in Byalokoz) lists Ural river (plus 10 versts on its left bank) in # the third time belt (before 1930 this means +03). ! # From Alexander Konzurovski (2018-12-20): ! # Qyzyolrda Region (Asia/Qyzylorda) is changing its time zone from ! # UTC+6 to UTC+5 effective December 21st, 2018. The legal document is ! # located here: http://adilet.zan.kz/rus/docs/P1800000817 (russian language). # Zone NAME GMTOFF RULES FORMAT [UNTIL] # # Almaty (formerly Alma-Ata), representing most locations in Kazakhstan # This includes KZ-AKM, KZ-ALA, KZ-ALM, KZ-AST, KZ-BAY, KZ-VOS, KZ-ZHA,
*** 2017,2053 **** 6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s 5:00 RussiaAsia +05/+06 1992 Jan 19 2:00s 6:00 RussiaAsia +06/+07 2004 Oct 31 2:00s 6:00 - +06 # Qyzylorda (aka Kyzylorda, Kizilorda, Kzyl-Orda, etc.) (KZ-KZY) - # This currently includes Qostanay (aka Kostanay, Kustanay) (KZ-KUS); - # see comments below. Zone Asia/Qyzylorda 4:21:52 - LMT 1924 May 2 4:00 - +04 1930 Jun 21 5:00 - +05 1981 Apr 1 5:00 1:00 +06 1981 Oct 1 6:00 - +06 1982 Apr 1 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s 4:00 RussiaAsia +04/+05 1991 Sep 29 2:00s 5:00 RussiaAsia +05/+06 1992 Jan 19 2:00s 6:00 RussiaAsia +06/+07 1992 Mar 29 2:00s 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s ! 6:00 - +06 ! # The following zone is like Asia/Qyzylorda except for being one ! # hour earlier from 1991-09-29 to 1992-03-29. The 1991/2 rules for ! # Qostanay are unclear partly because of the 1997 Turgai ! # reorganization, so this zone is commented out for now. ! #Zone Asia/Qostanay 4:14:20 - LMT 1924 May 2 ! # 4:00 - +04 1930 Jun 21 ! # 5:00 - +05 1981 Apr 1 ! # 5:00 1:00 +06 1981 Oct 1 ! # 6:00 - +06 1982 Apr 1 ! # 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s ! # 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s ! # 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s ! # 6:00 - +06 # # Aqtöbe (aka Aktobe, formerly Aktyubinsk) (KZ-AKT) Zone Asia/Aqtobe 3:48:40 - LMT 1924 May 2 4:00 - +04 1930 Jun 21 5:00 - +05 1981 Apr 1 5:00 1:00 +06 1981 Oct 1 --- 2226,2261 ---- 6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s 5:00 RussiaAsia +05/+06 1992 Jan 19 2:00s 6:00 RussiaAsia +06/+07 2004 Oct 31 2:00s 6:00 - +06 # Qyzylorda (aka Kyzylorda, Kizilorda, Kzyl-Orda, etc.) (KZ-KZY) Zone Asia/Qyzylorda 4:21:52 - LMT 1924 May 2 4:00 - +04 1930 Jun 21 5:00 - +05 1981 Apr 1 5:00 1:00 +06 1981 Oct 1 6:00 - +06 1982 Apr 1 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s 4:00 RussiaAsia +04/+05 1991 Sep 29 2:00s 5:00 RussiaAsia +05/+06 1992 Jan 19 2:00s 6:00 RussiaAsia +06/+07 1992 Mar 29 2:00s 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s ! 6:00 - +06 2018 Dec 21 0:00 ! 5:00 - +05 # + # Qostanay (aka Kostanay, Kustanay) (KZ-KUS) + # The 1991/2 rules are unclear partly because of the 1997 Turgai + # reorganization. + Zone Asia/Qostanay 4:14:28 - LMT 1924 May 2 + 4:00 - +04 1930 Jun 21 + 5:00 - +05 1981 Apr 1 + 5:00 1:00 +06 1981 Oct 1 + 6:00 - +06 1982 Apr 1 + 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s + 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s + 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s + 6:00 - +06 + # Aqtöbe (aka Aktobe, formerly Aktyubinsk) (KZ-AKT) Zone Asia/Aqtobe 3:48:40 - LMT 1924 May 2 4:00 - +04 1930 Jun 21 5:00 - +05 1981 Apr 1 5:00 1:00 +06 1981 Oct 1
*** 2137,2159 **** # newspapers in Korean, all articles correspond with data in Wikipedia. # For example, the article in 1948 (Korean Language) proved that DST # started at June 1 in that year. For another example, the article in # 1988 said that DST started at 2:00 AM in that year. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule ROK 1948 only - Jun 1 0:00 1:00 D ! Rule ROK 1948 only - Sep 13 0:00 0 S Rule ROK 1949 only - Apr 3 0:00 1:00 D ! Rule ROK 1949 1951 - Sep Sun>=8 0:00 0 S Rule ROK 1950 only - Apr 1 0:00 1:00 D Rule ROK 1951 only - May 6 0:00 1:00 D Rule ROK 1955 only - May 5 0:00 1:00 D ! Rule ROK 1955 only - Sep 9 0:00 0 S Rule ROK 1956 only - May 20 0:00 1:00 D ! Rule ROK 1956 only - Sep 30 0:00 0 S Rule ROK 1957 1960 - May Sun>=1 0:00 1:00 D ! Rule ROK 1957 1960 - Sep Sun>=18 0:00 0 S Rule ROK 1987 1988 - May Sun>=8 2:00 1:00 D Rule ROK 1987 1988 - Oct Sun>=8 3:00 0 S # From Paul Eggert (2016-08-23): # The Korean Wikipedia entry gives the following sources for UT offsets: --- 2345,2389 ---- # newspapers in Korean, all articles correspond with data in Wikipedia. # For example, the article in 1948 (Korean Language) proved that DST # started at June 1 in that year. For another example, the article in # 1988 said that DST started at 2:00 AM in that year. + # From Phake Nick (2018-10-27): + # 1. According to official announcement from Korean government, the DST end + # date in South Korea should be + # 1955-09-08 without specifying time + # http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027977557 + # 1956-09-29 without specifying time + # http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027978341 + # 1957-09-21 24 o'clock + # http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027979690#3 + # 1958-09-20 24 o'clock + # http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027981189 + # 1959-09-19 24 o'clock + # http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0027982974#2 + # 1960-09-17 24 o'clock + # http://theme.archives.go.kr/next/common/viewEbook.do?singleData=N&archiveEventId=0028044104 + # ... + # 2.... https://namu.wiki/w/대한민국%20표준시 ... [says] + # when Korea was using GMT+8:30 as standard time, the international + # aviation/marine/meteorological industry in the country refused to + # follow and continued to use GMT+9:00 for interoperability. + + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule ROK 1948 only - Jun 1 0:00 1:00 D ! Rule ROK 1948 only - Sep 12 24:00 0 S Rule ROK 1949 only - Apr 3 0:00 1:00 D ! Rule ROK 1949 1951 - Sep Sat>=7 24:00 0 S Rule ROK 1950 only - Apr 1 0:00 1:00 D Rule ROK 1951 only - May 6 0:00 1:00 D Rule ROK 1955 only - May 5 0:00 1:00 D ! Rule ROK 1955 only - Sep 8 24:00 0 S Rule ROK 1956 only - May 20 0:00 1:00 D ! Rule ROK 1956 only - Sep 29 24:00 0 S Rule ROK 1957 1960 - May Sun>=1 0:00 1:00 D ! Rule ROK 1957 1960 - Sep Sat>=17 24:00 0 S Rule ROK 1987 1988 - May Sun>=8 2:00 1:00 D Rule ROK 1987 1988 - Oct Sun>=8 3:00 0 S # From Paul Eggert (2016-08-23): # The Korean Wikipedia entry gives the following sources for UT offsets:
*** 2880,2892 **** # Palestine summer time will start on Mar 24th 2018 by advancing the # clock by 60 minutes as per Palestinian cabinet decision published on # the official website, though the decree did not specify the exact # time of the time shift. # http://www.palestinecabinet.gov.ps/Website/AR/NDecrees/ViewFile.ashx?ID=e7a42ab7-ee23-435a-b9c8-a4f7e81f3817 ! # ! # From Paul Eggert (2018-03-16): ! # For 2016 on, predict spring transitions on March's fourth Saturday at 01:00. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule EgyptAsia 1957 only - May 10 0:00 1:00 S Rule EgyptAsia 1957 1958 - Oct 1 0:00 0 - Rule EgyptAsia 1958 only - May 1 0:00 1:00 S --- 3110,3128 ---- # Palestine summer time will start on Mar 24th 2018 by advancing the # clock by 60 minutes as per Palestinian cabinet decision published on # the official website, though the decree did not specify the exact # time of the time shift. # http://www.palestinecabinet.gov.ps/Website/AR/NDecrees/ViewFile.ashx?ID=e7a42ab7-ee23-435a-b9c8-a4f7e81f3817 ! ! # From Even Scharning (2019-03-23): ! # DST in Palestine will start on 30 March this year, not 23 March as the time ! # zone database predicted. ! # https://ramallah.news/post/123610 ! # ! # From Tim Parenti (2019-03-23): ! # Combining this with the rules observed since 2016, adjust our spring ! # transition guess to Mar Sat>=24. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule EgyptAsia 1957 only - May 10 0:00 1:00 S Rule EgyptAsia 1957 1958 - Oct 1 0:00 0 - Rule EgyptAsia 1958 only - May 1 0:00 1:00 S
*** 2913,2923 **** Rule Palestine 2012 2014 - Mar lastThu 24:00 1:00 S Rule Palestine 2012 only - Sep 21 1:00 0 - Rule Palestine 2013 only - Sep Fri>=21 0:00 0 - Rule Palestine 2014 2015 - Oct Fri>=21 0:00 0 - Rule Palestine 2015 only - Mar lastFri 24:00 1:00 S ! Rule Palestine 2016 max - Mar Sat>=22 1:00 1:00 S Rule Palestine 2016 max - Oct lastSat 1:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Gaza 2:17:52 - LMT 1900 Oct 2:00 Zion EET/EEST 1948 May 15 --- 3149,3159 ---- Rule Palestine 2012 2014 - Mar lastThu 24:00 1:00 S Rule Palestine 2012 only - Sep 21 1:00 0 - Rule Palestine 2013 only - Sep Fri>=21 0:00 0 - Rule Palestine 2014 2015 - Oct Fri>=21 0:00 0 - Rule Palestine 2015 only - Mar lastFri 24:00 1:00 S ! Rule Palestine 2016 max - Mar Sat>=24 1:00 1:00 S Rule Palestine 2016 max - Oct lastSat 1:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Gaza 2:17:52 - LMT 1900 Oct 2:00 Zion EET/EEST 1948 May 15
*** 2941,2950 **** --- 3177,3191 ---- # Paracel Is # no information # Philippines + + # From Paul Eggert (2018-11-18): + # The Spanish initially used American (west-of-Greenwich) time. + # It is unknown what time Manila kept when the British occupied it from + # 1762-10-06 through 1764-04; for now assume it kept American time. # On 1844-08-16, Narciso Clavería, governor-general of the # Philippines, issued a proclamation announcing that 1844-12-30 was to # be immediately followed by 1845-01-01; see R.H. van Gent's # History of the International Date Line # https://www.staff.science.uu.nl/~gent0113/idl/idl_philippines.htm
*** 3026,3037 **** # assembled his staff and laid down the law. 'I've had enough of this,' he # shrieked. 'It is now 12 o'clock Higgins Time, and from now on this station is # going to run on Higgins Time.' And so, until last year, it did." See: # Antar E. Dinner at When? Saudi Aramco World, 1969 March/April. 2-3. # http://archive.aramcoworld.com/issue/196902/dinner.at.when.htm ! # newspapers.com says a similar story about Higgins was published in the Port ! # Angeles (WA) Evening News, 1965-03-10, page 5, but I lack access to the text. # # The TZ database cannot represent quasi-solar time; airline time is the best # we can do. The 1946 foreign air news digest of the U.S. Civil Aeronautics # Board (OCLC 42299995) reported that the "... Arabian Government, inaugurated # a weekly Dhahran-Cairo service, via the Saudi Arabian cities of Riyadh and --- 3267,3278 ---- # assembled his staff and laid down the law. 'I've had enough of this,' he # shrieked. 'It is now 12 o'clock Higgins Time, and from now on this station is # going to run on Higgins Time.' And so, until last year, it did." See: # Antar E. Dinner at When? Saudi Aramco World, 1969 March/April. 2-3. # http://archive.aramcoworld.com/issue/196902/dinner.at.when.htm ! # Also see: Antar EN. Arabian flying is confusing. ! # Port Angeles (WA) Evening News. 1965-03-10. page 3. # # The TZ database cannot represent quasi-solar time; airline time is the best # we can do. The 1946 foreign air news digest of the U.S. Civil Aeronautics # Board (OCLC 42299995) reported that the "... Arabian Government, inaugurated # a weekly Dhahran-Cairo service, via the Saudi Arabian cities of Riyadh and
*** 3400,3406 **** --- 3641,3659 ---- 8:00 - +08 1955 Jul 1 7:00 - +07 1959 Dec 31 23:00 8:00 - +08 1975 Jun 13 7:00 - +07 + # From Paul Eggert (2019-02-19): + # + # The Ho Chi Minh entry suffices for most purposes as it agrees with all of + # Vietnam since 1975-06-13. Presumably clocks often changed in south Vietnam + # in the early 1970s as locations changed hands during the war; however the + # details are unknown and would likely be too voluminous for this database. + # + # For timestamps in north Vietnam back to 1970 (the tzdb cutoff), + # use Asia/Bangkok; see the VN entries in the file zone1970.tab. + # For timestamps before 1970, see Asia/Hanoi in the file 'backzone'. + + # Yemen # See Asia/Riyadh.
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