6
6
# tz@iana.org for general use in the future). For more, please see
7
7
# the file CONTRIBUTING in the tz distribution.
9
# From Paul Eggert (2013-08-11):
9
# From Paul Eggert (2014-10-31):
11
# A good source for time zone historical data outside the U.S. is
11
# Unless otherwise specified, the source for data through 1990 is:
12
12
# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
13
13
# San Diego: ACS Publications, Inc. (2003).
14
# Unfortunately this book contains many errors and cites no sources.
15
16
# Gwillim Law writes that a good source
16
17
# for recent time zone data is the International Air Transport
17
18
# Association's Standard Schedules Information Manual (IATA SSIM),
18
19
# published semiannually. Law sent in several helpful summaries
19
# of the IATA's data after 1990.
21
# Except where otherwise noted, Shanks & Pottenger is the source for
22
# entries through 1990, and IATA SSIM is the source for entries afterwards.
20
# of the IATA's data after 1990. Except where otherwise noted,
21
# IATA SSIM is the source for entries after 1990.
24
23
# Another source occasionally used is Edward W. Whitman, World Time Differences,
25
24
# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
1663
1659
# Korea (North and South)
1665
1661
# From Annie I. Bang (2006-07-10):
1666
# http://www.koreaherald.co.kr/SITE/data/html_dir/2006/07/10/200607100012.asp
1667
# The Ministry of Commerce, Industry and Energy has already
1668
# commissioned a research project [to reintroduce DST] and has said
1669
# the system may begin as early as 2008.... Korea ran a daylight
1670
# saving program from 1949-61 but stopped it during the 1950-53 Korean War.
1672
# From Shanks & Pottenger:
1662
# http://www.koreaherald.com/view.php?ud=200607100012
1663
# Korea ran a daylight saving program from 1949-61 but stopped it
1664
# during the 1950-53 Korean War. The system was temporarily enforced
1665
# between 1987 and 1988 ...
1667
# From Sanghyuk Jung (2014-10-29):
1668
# http://mm.icann.org/pipermail/tz/2014-October/021830.html
1669
# According to the Korean Wikipedia
1670
# http://ko.wikipedia.org/wiki/한국_표준시
1671
# [oldid=12896437 2014-09-04 08:03 UTC]
1672
# DST in Republic of Korea was as follows.... And I checked old
1673
# newspapers in Korean, all articles correspond with data in Wikipedia.
1674
# For example, the article in 1948 (Korean Language) proved that DST
1675
# started at June 1 in that year. For another example, the article in
1676
# 1988 said that DST started at 2:00 AM in that year.
1673
1678
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1674
Rule ROK 1960 only - May 15 0:00 1:00 D
1675
Rule ROK 1960 only - Sep 13 0:00 0 S
1676
Rule ROK 1987 1988 - May Sun>=8 0:00 1:00 D
1677
Rule ROK 1987 1988 - Oct Sun>=8 0:00 0 S
1679
Rule ROK 1948 only - Jun 1 0:00 1:00 D
1680
Rule ROK 1948 only - Sep 13 0:00 0 S
1681
Rule ROK 1949 only - Apr 3 0:00 1:00 D
1682
Rule ROK 1949 1951 - Sep Sun>=8 0:00 0 S
1683
Rule ROK 1950 only - Apr 1 0:00 1:00 D
1684
Rule ROK 1951 only - May 6 0:00 1:00 D
1685
Rule ROK 1955 only - May 5 0:00 1:00 D
1686
Rule ROK 1955 only - Sep 9 0:00 0 S
1687
Rule ROK 1956 only - May 20 0:00 1:00 D
1688
Rule ROK 1956 only - Sep 30 0:00 0 S
1689
Rule ROK 1957 1960 - May Sun>=1 0:00 1:00 D
1690
Rule ROK 1957 1960 - Sep Sun>=18 0:00 0 S
1691
Rule ROK 1987 1988 - May Sun>=8 2:00 1:00 D
1692
Rule ROK 1987 1988 - Oct Sun>=8 3:00 0 S
1679
# From Paul Eggert (2014-07-01):
1680
# The following entries are from Shanks & Pottenger, except that I
1681
# guessed that time zone abbreviations through 1945 followed the same
1694
# From Paul Eggert (2014-10-30):
1695
# The Korean Wikipedia entry gives the following sources for UT offsets:
1697
# 1908: Official Journal Article No. 3994 (Edict No. 5)
1698
# 1912: Governor-General of Korea Official Gazette Issue No. 367
1699
# (Announcement No. 338)
1700
# 1954: Presidential Decree No. 876 (1954-03-17)
1701
# 1961: Law No. 676 (1961-08-07)
1702
# 1987: Law No. 3919 (1986-12-31)
1704
# The Wikipedia entry also has confusing information about a change
1705
# to UT+9 in April 1910, but then what would be the point of the later change
1706
# to UT+9 on 1912-01-01? Omit the 1910 change for now.
1708
# I guessed that time zone abbreviations through 1945 followed the same
1682
1709
# rules as discussed under Taiwan, with nominal switches from JST to KST
1683
1710
# when the respective cities were taken over by the Allies after WWII.
1712
# For Pyongyang we have no information; guess no changes since World War II.
1685
1714
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1686
Zone Asia/Seoul 8:27:52 - LMT 1890
1715
Zone Asia/Seoul 8:27:52 - LMT 1908 Apr 1
1716
8:30 - KST 1912 Jan 1
1690
1717
9:00 - JCST 1937 Oct 1
1691
1718
9:00 - JST 1945 Sep 8
1692
1719
9:00 - KST 1954 Mar 21
1693
8:00 ROK K%sT 1961 Aug 10
1720
8:30 ROK K%sT 1961 Aug 10
1696
Zone Asia/Pyongyang 8:23:00 - LMT 1890
1722
Zone Asia/Pyongyang 8:23:00 - LMT 1908 Apr 1
1723
8:30 - KST 1912 Jan 1
1700
1724
9:00 - JCST 1937 Oct 1
1701
1725
9:00 - JST 1945 Aug 24
1702
9:00 - KST 1954 Mar 21
1703
8:00 - KST 1961 Aug 10
1706
1728
###############################################################################
1709
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1710
Zone Asia/Kuwait 3:11:56 - LMT 1950
1714
1734
# See Asia/Bangkok.