>From 3ddf68d115d0bfb6555e9744ea05d9d6bb47565c Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Fri, 4 Jul 2014 11:01:17 -0700 Subject: [PATCH] * asia (Asia/Taipei): 1945 transition was 09-21 01:00, not 10-25. Also, update commentary to describe recent changes better. (Thanks to Yu-Cheng Chuang.) * NEWS: Document this. --- NEWS | 4 +++- asia | 82 ++++++++++++++++++++++++++++++++++++++++++-------------------------- 2 files changed, 54 insertions(+), 32 deletions(-) diff --git a/NEWS b/NEWS index 217a35e..6f24217 100644 --- a/NEWS +++ b/NEWS @@ -45,7 +45,9 @@ Unreleased, experimental changes transition to standard time has been changed from 1928 to 1901. Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01, - then to CST on 1945-10-25, and did not observe DST in 1945. + then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945. + In 1946 it observed DST from 05-15 through 09-30; in 1947 + from 04-15 through 10-31; and in 1979 from 07-01 through 09-30. (Thanks to Yu-Cheng Chuang.) Finland's 1942 fall-back transition was October 4 at 01:00, not diff --git a/asia b/asia index 5884339..321deae 100644 --- a/asia +++ b/asia @@ -620,30 +620,11 @@ Zone Asia/Hong_Kong 7:36:42 - LMT 1904 Oct 30 # 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. - # From smallufo (2010-04-03): -# According to Taiwan's CWB, +# According to Taiwan's CWB [Central Weather Bureau], # http://www.cwb.gov.tw/V6/astronomy/cdata/summert.htm # Taipei has DST in 1979 between July 1st and Sep 30. -# From Arthur David Olson (2010-04-07): -# Here's Google's translation of the table at the bottom of the "summert.htm" page: -# Decade Name Start and end date -# Republic of China 34 years to 40 years (AD 1945-1951 years) Summer Time May 1 to September 30 -# 41 years of the Republic of China (AD 1952) Daylight Saving Time March 1 to October 31 -# Republic of China 42 years to 43 years (AD 1953-1954 years) Daylight Saving Time April 1 to October 31 -# In the 44 years to 45 years (AD 1955-1956 years) Daylight Saving Time April 1 to September 30 -# Republic of China 46 years to 48 years (AD 1957-1959) Summer Time April 1 to September 30 -# Republic of China 49 years to 50 years (AD 1960-1961) Summer Time June 1 to September 30 -# Republic of China 51 years to 62 years (AD 1962-1973 years) Stop Summer Time -# Republic of China 63 years to 64 years (1974-1975 AD) Daylight Saving Time April 1 to September 30 -# Republic of China 65 years to 67 years (1976-1978 AD) Stop Daylight Saving Time -# Republic of China 68 years (AD 1979) Daylight Saving Time July 1 to September 30 -# Republic of China since 69 years (AD 1980) Stop Daylight Saving Time - # From Yu-Cheng Chuang (2013-07-12): # On Dec 28, 1895, the Meiji Emperor announced Ordinance No. 167 of # Meiji Year 28 "The clause about standard time", mentioned that @@ -667,16 +648,50 @@ Zone Asia/Hong_Kong 7:36:42 - LMT 1904 Oct 30 # http://ja.wikisource.org/wiki/��������������������������������������������������������������������������������� # # That is, the time zone of Taipei switched to UTC+9 on Oct 1, 1937. -# -# Of course, after the surrender of Japan, time zone of Taiwan -# switched back to UTC+8. However I can't find enough evidence to tell -# when the switch happened. The only thing I know is that the official -# surrender ceremony is on Oct 25, 1945. From then, Taiwan and Penghu -# islands are territories of the Republic of China, until now. -# From Paul Eggert (2014-07-01): -# As per Yu-Cheng Chuang, say that Taiwan was at UT+9 from 1937-10-01 -# until 1945-10-25, overriding Shanks & Pottenger. +# From Yu-Cheng Chuang (2014-07-02): +# I've found more evidence about when the time zone was switched from UTC+9 +# back to UTC+8 after WW2. I believe it was on Sep 21, 1945. In a document +# during Japanese era [1] in which the officer told the staff to change time +# zone back to Western Standard Time (UTC+8) on Sep 21. And in another +# history page of National Cheng Kung University [2], on Sep 21 there is a +# note "from today, switch back to Western Standard Time". From these two +# materials, I believe that the time zone change happened on Sep 21. And +# today I have found another monthly journal called "The Astronomical Herald" +# from The Astronomical Society of Japan [3] in which it mentioned the fact +# that: +# +# 1. Standard Time of the Country (Japan) was adopted on Jan 1, 1888, using +# the time at 135E (GMT+9) +# +# 2. Standard Time of the Country was renamed to Central Standard Time, on Jan +# 1, 1898, and on the same day, the new territories Taiwan and Penghu islands, +# as well as Yaeyama and Miyako islands, adopted a new time zone called +# Western Standard Time, which is in GMT+8. +# +# 3. Western Standard Time was deprecated on Sep 30, 1937. From then all the +# territories of Japan adopted the same time zone, which is Central Standard +# Time. +# +# [1] Academica Historica, Taiwan: +# http://163.29.208.22:8080/govsaleShowImage/connect_img.php?s=00101738900090036&e=00101738900090037 +# [2] Nat'l Cheng Kung University 70th Anniversary Special Site: +# http://www.ncku.edu.tw/~ncku70/menu/001/01_01.htm +# [3] Yukio Niimi, The Standard Time in Japan (1997), p.475: +# http://www.asj.or.jp/geppou/archive_open/1997/pdf/19971001c.pdf + +# Yu-Cheng Chuang (2014-07-03): +# I finally have found the real official gazette about changing back to +# Western Standard Time on Sep 21 in Taiwan. It's Taiwan Governor-General +# Bulletin No. 386 in Showa 20 years (1945), published on Sep 19, 1945. [1] ... +# [It] abolishes Bulletin No. 207 in Showa 12 years (1937), which is a local +# bulletin in Taiwan for that Ordinance No. 529. It also mentioned that 1am on +# Sep 21, 1945 will be 12am on Sep 21. I think this bulletin is much more +# official than the one I mentioned in my first mail, because it's from the +# top-level government in Taiwan. If you���re going to quote any resource, this +# would be a good one. +# [1] Taiwan Governor-General Gazette, No. 1018, Sep 19, 1945: +# http://db2.th.gov.tw/db2/view/viewImg.php?imgcode=0072031018a&num=19&bgn=019&end=019&otherImg=&type=gener # From Yu-Cheng Chuang (2014-07-02): # In 1946, DST in Taiwan was from May 15 and ended on Sep 30. The info from @@ -699,7 +714,12 @@ Zone Asia/Hong_Kong 7:36:42 - LMT 1904 Oct 30 # # The Central Weather Bureau website didn't mention that, however it can # be found from historical government announcement database. - + +# From Paul Eggert (2014-07-03): +# As per Yu-Cheng Chuang, say that Taiwan was at UT+9 from 1937-10-01 +# until 1945-09-21 at 01:00, overriding Shanks & Pottenger. +# Likewise, use Yu-Cheng Chuang's data for DST in Taiwan. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Taiwan 1946 only - May 15 0:00 1:00 D Rule Taiwan 1946 only - Oct 1 0:00 0 S @@ -721,7 +741,7 @@ Rule Taiwan 1979 only - Oct 1 0:00 0 S # Taipei or Taibei or T'ai-pei Zone Asia/Taipei 8:06:00 - LMT 1896 Jan 1 8:00 - JWST 1937 Oct 1 - 9:00 - JST 1945 Oct 25 + 9:00 - JST 1945 Sep 21 01:00 8:00 Taiwan C%sT # Macau (Macao, Aomen) -- 1.9.3