From 2c371e8c25f29eeee1e45612d1b0f38d8d6fb705 Mon Sep 17 00:00:00 2001 From: Tim Parenti Date: Sat, 4 Oct 2014 16:22:06 -0400 Subject: Adjust Asia/Ho_Chi_Minh and Asia/Phnom_Penh between 1906 and 1911. * asia (Asia/Ho_Chi_Minh, Asia/Phnom_Penh): Standard time of UT+7:06:30 was introduced on 1906-07-01 and observed until the introduction of UT+7:00 on 1911-05-01. * NEWS: Document this. --- NEWS | 11 +++++++++++ asia | 23 +++++++++++++++++++---- 2 files changed, 30 insertions(+), 4 deletions(-) diff --git a/NEWS b/NEWS index 5e33102..6640268 100644 --- a/NEWS +++ b/NEWS @@ -1,5 +1,16 @@ News for the tz database +Unreleased, experimental changes + + Changes affecting past time stamps + + The date of the introduction of standard time in Asia/Ho_Chi_Minh and + Asia/Phnom_Penh was 1906-07-01, not 06-09; additionally, UT+7:00 was + adopted in these locations on 1911-05-01, not 03-11. The time has been + adjusted by a few seconds during this time. + (Thanks to Trần Ng�c Quân for reporting the problem.) + + Release 2014h - 2014-09-25 18:59:03 -0700 Changes affecting past time stamps diff --git a/asia b/asia index 0be896b..7ca109f 100644 --- a/asia +++ b/asia @@ -272,8 +272,8 @@ Zone Asia/Rangoon 6:24:40 - LMT 1880 # or Yangon # Cambodia # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Asia/Phnom_Penh 6:59:40 - LMT 1906 Jun 9 - 7:06:20 - SMT 1911 Mar 11 0:01 # Saigon MT? +Zone Asia/Phnom_Penh 6:59:40 - LMT 1906 Jul 1 0:00 + 7:06:30 - PLMT 1911 May 1 0:00 # Phù Liễn MT 7:00 - ICT 1912 May 8:00 - ICT 1931 May 7:00 - ICT @@ -2775,14 +2775,29 @@ Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2 # from Saigon's location. For now, ignore this and stick with Shanks # and Pottenger. +# From Trần Ng�c Quân (2014-10-03): +# http://www.thoigian.com.vn/?mPage=P80D01 +# is a good Vietnamese-language source for several 20th-century decrees +# related to time in Vietnam. +# +# Translation from Brian Inglis (2014-10-04): +# "When completed construction Observatory Phu Lien, Indochina government +# decree dated 1906-06-09 (Official Gazette dated 1906-06-18 Indochina) +# fixed now legal for all countries of Indochina under the meridian passing +# through Phù Liễn (104°17'17" east of Paris) from 0 hours on 1906-07-01." +# +# From Tim Parenti (2014-10-04): +# The Paris meridian is at 2°20'14"; adding 104°17'17" gives 106°37'31", or +# UT+7:06:30. + # From Arthur David Olson (2008-03-18): # The English-language name of Vietnam's most populous city is "Ho Chi Minh # City"; use Ho_Chi_Minh below to avoid a name of more than 14 characters. # From Shanks & Pottenger: # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Asia/Ho_Chi_Minh 7:06:40 - LMT 1906 Jun 9 - 7:06:20 - SMT 1911 Mar 11 0:01 # Saigon MT? +Zone Asia/Ho_Chi_Minh 7:06:40 - LMT 1906 Jul 1 0:00 + 7:06:30 - PLMT 1911 May 1 0:00 # Phù Liễn MT 7:00 - ICT 1912 May 8:00 - ICT 1931 May 7:00 - ICT -- 2.1.1