--- old/make/data/tzdata/asia 2020-04-27 18:00:47.325232830 +0000 +++ new/make/data/tzdata/asia 2020-04-27 18:00:46.857209213 +0000 @@ -309,6 +309,27 @@ # China +# From Phake Nick (2020-04-15): +# According to this news report: +# http://news.sina.com.cn/c/2004-09-01/19524201403.shtml +# on April 11, 1919, newspaper in Shanghai said clocks in Shanghai will spring +# forward for an hour starting from midnight of that Saturday. The report did +# not mention what happened in Shanghai thereafter, but it mentioned that a +# similar trial in Tianjin which ended at October 1st as citizens are told to +# recede the clock on September 30 from 12:00pm to 11:00pm. The trial at +# Tianjin got terminated in 1920. +# +# From Paul Eggert (2020-04-15): +# The Returns of Trade and Trade Reports, page 711, says "Daylight saving was +# given a trial during the year, and from the 12th April to the 1st October +# the clocks were all set one hour ahead of sun time. Though the scheme was +# generally esteemed a success, it was announced early in 1920 that it would +# not be repeated." +# +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Shang 1919 only - Apr 12 24:00 1:00 D +Rule Shang 1919 only - Sep 30 24:00 0 S + # From Paul Eggert (2018-10-02): # The following comes from Table 1 of: # Li Yu. Research on the daylight saving movement in 1940s Shanghai. @@ -317,6 +338,89 @@ # The table lists dates only; I am guessing 00:00 and 24:00 transition times. # Also, the table lists the planned end of DST in 1949, but the corresponding # zone line cuts this off on May 28, when the Communists took power. + +# From Phake Nick (2020-04-15): +# +# For the history of time in Shanghai between 1940-1942, the situation is +# actually slightly more complex than the table [below].... At the time, +# there were three different authorities in Shanghai, including Shanghai +# International Settlement, a settlement established by western countries with +# its own westernized form of government, Shanghai French Concession, similar +# to the international settlement but is controlled by French, and then the +# rest of the city of Shanghai, which have already been controlled by Japanese +# force through a puppet local government (Wang Jingwei regime). It was +# additionally complicated by the circumstances that, according to the 1940s +# Shanghai summer time essay cited in the database, some +# departments/businesses/people in the Shanghai city itself during that time +# period, refused to change their clock and instead only changed their opening +# hours. +# +# For example, as quoted in the article, in 1940, other than the authority +# itself, power, tram, bus companies, cinema, department stores, and other +# public service organizations have all decided to follow the summer time and +# spring forward the clock. On the other hand, the custom office refused to +# spring forward the clock because of worry on mechanical wear to the physical +# clock, postal office refused to spring forward because of disruption to +# business and log-keeping, although they did changed their office hour to +# match rest of the city. So is travel agents, and also weather +# observatory. It is said both time standards had their own supporters in the +# city at the time, those who prefer new time standard would have moved their +# clock while those who prefer the old time standard would keep their clock +# unchange, and there were different clocks that use different time standard +# in the city at the time for people who use different time standard to adjust +# their clock to their preferred time. +# +# a. For the 1940 May 31 spring forward, the essay claim that it was +# coordinared between the international settlement authority and the French +# concession authority and have gathered support from Hong Kong and Xiamen, +# that it would spring forward an hour from May 31 "midnight", and the essay +# claim "Hong Kong government implemented the spring forward in the same time +# on the same date as Shanghai". +# +# b. For the 1940 fall back, it was said that they initially intended to do +# so on September 30 00:59 at night, however they postponed it to October 12 +# after discussion with relevant parties. However schools restored to the +# original schedule ten days earlier. +# +# c. For the 1941 spring forward, it is said to start from March 15 +# "following the previous year's method", and in addition to that the essay +# cited an announcement in 1941 from the Wang regime which said the Special +# City of Shanghai under Wang regime control will follow the DST rule set by +# the Settlements, irrespective of the original DST plan announced by the Wang +# regime for other area under its control(April 1 to September 30). (no idea +# to situation before that announcement) +# +# d. For the 1941 fall back, it was said that the fall back would occurs at +# the end of September (A newspaper headline cited by the essay, published on +# October 1, 1941, have the headlines which said "French Concession would +# rewind to the old clock this morning), but it ultimately didn't happen due +# to disagreement between the international settlement authority and the +# French concession authority, and the fall back ultimately occurred on +# November 1. +# +# e. In 1941 December, Japan have officially started war with the United +# States and the United Kingdom, and in Shanghai they have marched into the +# international settlement, taken over its control +# +# f. For the 1942 spring forward, the essay said that the spring forward +# started on January 31. It said this time the custom office and postal +# department will also change their clocks, unlike before. +# +# g. The essay itself didn't cover any specific changes thereafter until the +# end of the war, it quoted a November 1942 command from the government of the +# Wang regime, which claim the daylight saving time applies year round during +# the war. However, the essay ambiguously said the period is "February 1 to +# September 30", which I don't really understand what is the meaning of such +# period in the context of year round implementation here.. More researches +# might be needed to show exactly what happened during that period of time. + +# From Phake Nick (2020-04-15): +# According to a Japanese tour bus pamphlet in Nanjing area believed to be +# from around year 1941: http://www.tt-museum.jp/tairiku_0280_nan1941.html , +# the schedule listed was in the format of Japanese time. Which indicate some +# use of the Japanese time (instead of syncing by DST) might have occurred in +# the Yangtze river delta area during that period of time although the scope +# of such use will need to be investigated to determine. # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Shang 1940 only - Jun 1 0:00 1:00 D @@ -595,7 +699,7 @@ 6:00 - +06 -# Hong Kong (Xianggang) +# Hong Kong # Milne gives 7:36:41.7; round this. @@ -605,9 +709,7 @@ # it is not [an] observatory, but the official meteorological agency of HK, # and also serves as the official timing agency), there are some missing # 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 +# think 3:30 is correct. # From Phake Nick (2018-10-27): # According to Singaporean newspaper @@ -718,10 +820,10 @@ # Resolution of the Legislative Council passed on 9 May 1979 # https://www.legco.gov.hk/yr78-79/english/lc_sitg/hansard/h790509.pdf#page=39 -# From Paul Eggert (2019-05-31): +# From Paul Eggert (2020-04-15): # Here are the dates given at -# https://www.hko.gov.hk/gts/time/Summertime.htm -# as of 2014-06-19: +# https://www.hko.gov.hk/en/gts/time/Summertime.htm +# as of 2020-02-10: # Year Period # 1941 15 Jun to 30 Sep # 1942 Whole year @@ -1851,6 +1953,47 @@ # '9:00' and 'JST' is from Guy Harris. +# From Paul Eggert (2020-01-19): +# Starting in the 7th century, Japan generally followed an ancient Chinese +# timekeeping system that divided night and day into six hours each, +# with hour length depending on season. In 1873 the government +# started requiring the use of a Western style 24-hour clock. See: +# Yulia Frumer, "Making Time: Astronomical Time Measurement in Tokugawa Japan" +# . As the tzdb code and +# data support only 24-hour clocks, its tables model timestamps before +# 1873 using Western-style local mean time. + +# From Hideyuki Suzuki (1998-11-09): +# 'Tokyo' usually stands for the former location of Tokyo Astronomical +# Observatory: 139° 44' 40.90" E (9h 18m 58.727s), 35° 39' 16.0" N. +# This data is from 'Rika Nenpyou (Chronological Scientific Tables) 1996' +# edited by National Astronomical Observatory of Japan.... +# JST (Japan Standard Time) has been used since 1888-01-01 00:00 (JST). +# The law is enacted on 1886-07-07. + +# From Hideyuki Suzuki (1998-11-16): +# The ordinance No. 51 (1886) established "standard time" in Japan, +# which stands for the time on 135° E. +# In the ordinance No. 167 (1895), "standard time" was renamed to "central +# standard time". And the same ordinance also established "western standard +# time", which stands for the time on 120° E.... But "western standard +# time" was abolished in the ordinance No. 529 (1937). In the ordinance No. +# 167, there is no mention regarding for what place western standard time is +# standard.... +# +# I wrote "ordinance" above, but I don't know how to translate. +# In Japanese it's "chokurei", which means ordinance from emperor. + +# From Yu-Cheng Chuang (2013-07-12): +# ...the Meiji Emperor announced Ordinance No. 167 of Meiji Year 28 "The clause +# about standard time" ... The adoption began from Jan 1, 1896. +# https://ja.wikisource.org/wiki/標準時ニ關スル件_(公布時) +# +# ...the Showa Emperor announced Ordinance No. 529 of Showa Year 12 ... which +# means the whole Japan territory, including later occupations, adopt Japan +# Central Time (UT+9). The adoption began on Oct 1, 1937. +# 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 + # From Paul Eggert (1995-03-06): # Today's _Asahi Evening News_ (page 4) reports that Japan had # daylight saving between 1948 and 1951, but "the system was discontinued @@ -1899,37 +2042,6 @@ Rule Japan 1949 only - Apr Sat>=1 24:00 1:00 D Rule Japan 1950 1951 - May Sat>=1 24:00 1:00 D -# From Hideyuki Suzuki (1998-11-09): -# 'Tokyo' usually stands for the former location of Tokyo Astronomical -# Observatory: 139° 44' 40.90" E (9h 18m 58.727s), 35° 39' 16.0" N. -# This data is from 'Rika Nenpyou (Chronological Scientific Tables) 1996' -# edited by National Astronomical Observatory of Japan.... -# JST (Japan Standard Time) has been used since 1888-01-01 00:00 (JST). -# The law is enacted on 1886-07-07. - -# From Hideyuki Suzuki (1998-11-16): -# The ordinance No. 51 (1886) established "standard time" in Japan, -# which stands for the time on 135° E. -# In the ordinance No. 167 (1895), "standard time" was renamed to "central -# standard time". And the same ordinance also established "western standard -# time", which stands for the time on 120° E.... But "western standard -# time" was abolished in the ordinance No. 529 (1937). In the ordinance No. -# 167, there is no mention regarding for what place western standard time is -# standard.... -# -# I wrote "ordinance" above, but I don't know how to translate. -# In Japanese it's "chokurei", which means ordinance from emperor. - -# From Yu-Cheng Chuang (2013-07-12): -# ...the Meiji Emperor announced Ordinance No. 167 of Meiji Year 28 "The clause -# about standard time" ... The adoption began from Jan 1, 1896. -# https://ja.wikisource.org/wiki/標準時ニ關スル件_(公布時) -# -# ...the Showa Emperor announced Ordinance No. 529 of Showa Year 12 ... which -# means the whole Japan territory, including later occupations, adopt Japan -# Central Time (UT+9). The adoption began on Oct 1, 1937. -# 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 STDOFF RULES FORMAT [UNTIL] Zone Asia/Tokyo 9:18:59 - LMT 1887 Dec 31 15:00u 9:00 Japan J%sT @@ -3109,22 +3221,9 @@ # [T]he Palestinian cabinet decision (Mar 8th 2016) published on # http://www.palestinecabinet.gov.ps/WebSite/Upload/Decree/GOV_17/16032016134830.pdf # states that summer time will end on Oct 29th at 01:00. -# -# From Tim Parenti (2016-10-19): -# Predict fall transitions on October's last Saturday at 01:00 from now on. -# This is consistent with the 2016 transition as well as our spring -# predictions. -# -# From Paul Eggert (2016-10-19): -# It's also consistent with predictions in the following URLs today: -# https://www.timeanddate.com/time/change/gaza-strip/gaza -# https://www.timeanddate.com/time/change/west-bank/hebron # From Sharef Mustafa (2018-03-16): -# 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. +# Palestine summer time will start on Mar 24th 2018 ... # http://www.palestinecabinet.gov.ps/Website/AR/NDecrees/ViewFile.ashx?ID=e7a42ab7-ee23-435a-b9c8-a4f7e81f3817 # From Even Scharning (2019-03-23): @@ -3134,15 +3233,20 @@ # From Sharif Mustafa (2019-03-26): # The Palestinian cabinet announced today that the switch to DST will # be on Fri Mar 29th 2019 by advancing the clock by 60 minutes. -# The decree signing date is Mar 12th but it was not published till today. -# The decree does not specify the exact time of switch. # http://palestinecabinet.gov.ps/Website/AR/NDecrees/ViewFile.ashx?ID=e54e9ea1-50ee-4137-84df-0d6c78da259b # # From Even Scharning (2019-04-10): # Our source in Palestine said it happened Friday 29 at 00:00 local time.... + +# From Sharef Mustafa (2019-10-18): +# Palestine summer time will end on midnight Oct 26th 2019 ... +# http://www.palestinecabinet.gov.ps/website/ar/ViewDetails?ID=43948 # # From Paul Eggert (2019-04-10): # For now, guess spring-ahead transitions are March's last Friday at 00:00. +# +# From Tim Parenti (2016-10-19): +# Predict fall transitions on October's last Saturday at 01:00 from now on. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule EgyptAsia 1957 only - May 10 0:00 1:00 S