FW: Chinese timezones do not observe DST

Olson, Arthur David (NIH/NCI) olsona at dc37a.nci.nih.gov
Mon Aug 9 14:17:35 UTC 2004


Since sending this message, Alexandru Pulbere has been added to the time
zone mailing list.
 
                --ado

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From: Pulbere, Alexandru [mailto:Alexandru.Pulbere at cognos.com] 
Sent: Thursday, August 05, 2004 6:56 PM
To: tz at lecserver.nci.nih.gov
Subject: Chinese timezones do not observe DST



I noticed that the timezone description for chinese timezones use DST. 
Aparently the chinese governament stopped using DST in 1992. 

To fix the problem I changed my copy asia file and regenerated ICU4J
resources (my copy). 


# China 

# From Guy Harris: 
# People's Republic of China.  Yes, they really have only one time zone. 

# From Bob Devine (1988-01-28): 
# No they don't.  See TIME mag, 1986-02-17 p.52.  Even though 
# China is across 4 physical time zones, before Feb 1, 1986 only the 
# Peking (Bejing) time zone was recognized.  Since that date, China 
# has two of 'em -- Peking's and Urumqi (named after the capital of 
# the Xinjiang Uyghur Autonomous Region).  I don't know about DST for it. 
# 
# . . .I just deleted the DST table and this editor makes it too 
# painful to suck in another copy..  So, here is what I have for 
# DST start/end dates for Peking's time zone (info from AP): 
# 
#     1986 May 4 - Sept 14 
#     1987 mid-April - ?? 

# From U. S. Naval Observatory (1989-01-19): 
# CHINA               8 H  AHEAD OF UTC  ALL OF CHINA, INCL TAIWAN 
# CHINA               9 H  AHEAD OF UTC  APR 17 - SEP 10 

# From Paul Eggert <eggert at twinsun.com> (1995-12-19): 
# Shanks writes that China has had a single time zone since 1980 May 1, 
# observing summer DST from 1986 through 1991; this contradicts Devine's 
# note about Time magazine, though apparently _something_ happened in 1986. 
# Go with Shanks for now.  I made up names for the other pre-1980 time
zones. 

# From Shanks: 
# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE
LETTER/S 
Rule    Shang   1940    only    -       Jun      3      0:00    1:00    D 
Rule    Shang   1940    1941    -       Oct      1      0:00    0       S 
Rule    Shang   1941    only    -       Mar     16      0:00    1:00    D 
Rule    PRC     1949    only    -       Jan      1      0:00    0       S 
Rule    PRC     1986    only    -       May      4      0:00    1:00    D 
Rule    PRC     1986    1991    -       Sep     Sun>=11 0:00    0       S 
Rule    PRC     1987    1991    -       Apr     Sun>=10 0:00    1:00    D 
# 
# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL] 
# 
# From Anthony Fok (2001-12-20): 
# BTW, I did some research on-line and found some info regarding these five 
# historic timezones from some Taiwan websites.  And yes, there are official

# Chinese names for these locales (before 1949): 
# Changbai Time ("Long-white Time", Long-white = Heilongjiang area) 
Zone    Asia/Harbin     8:26:44 -       LMT     1928 # or Haerbin 
                        8:30    -       CHAT    1932 Mar # Changbai Time 
                        8:00    -       CST     1940 
                        9:00    -       CHAT    1966 May 
                        8:30    -       CHAT    1980 May 
                        8:00    PRC     C%sT    1992 
                        8:00    -       CST 
# Zhongyuan Time ("Central plain Time") 
Zone    Asia/Shanghai   8:05:52 -       LMT     1928 
                        8:00    Shang   C%sT    1949 
                        8:00    PRC     C%sT    1992 
                        8:00    -       CST 
# Long-shu Time (probably due to Long and Shu being two names of that area) 
Zone    Asia/Chongqing  7:06:20 -       LMT     1928 # or Chungking 
                        7:00    -       LONT    1980 May # Long-shu Time 
                        8:00    PRC     C%sT    1992 
                        8:00    -       CST 
# Xin-zang Time ("Xinjiang-Tibet Time") 
Zone    Asia/Urumqi     5:50:20 -       LMT     1928 # or Urumchi 
                        6:00    -       URUT    1980 May # Urumqi Time 
                        8:00    PRC     C%sT    1992 
                        8:00    -       CST 
# Kunlun Time 
Zone    Asia/Kashgar    5:03:56 -       LMT     1928 # or Kashi or Kaxgar 
                        5:30    -       KAST    1940     # Kashgar Time 
                        5:00    -       KAST    1980 May 
                        8:00    PRC     C%sT    1992 
                        8:00    -       CST 

# Hong Kong (Xianggang) 
# 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    1952    -       Oct     lastSun 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    1977    -       Apr     Sun>=16 3:30    1:00    S 
Rule    HK      1965    1977    -       Oct     Sun>=16 3:30    0       - 
Rule    HK      1979    1980    -       May     Sun>=8  3:30    1:00    S 
Rule    HK      1979    1980    -       Oct     Sun>=16 3:30    0       - 
# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL] 
Zone    Asia/Hong_Kong  7:36:36 -       LMT     1904 Oct 30 
                        8:00    HK      HK%sT   2002 
                        8:00    -       CST                     


############################################################################
### 

# Taiwan 

# Shanks writes 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. 

# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE
LETTER/S 
Rule    Taiwan  1945    1951    -       May     1       0:00    1:00    D 
Rule    Taiwan  1945    1951    -       Oct     1       0:00    0       S 
Rule    Taiwan  1952    only    -       Mar     1       0:00    1:00    D 
Rule    Taiwan  1952    1954    -       Nov     1       0:00    0       S 
Rule    Taiwan  1953    1959    -       Apr     1       0:00    1:00    D 
Rule    Taiwan  1955    1961    -       Oct     1       0:00    0       S 
Rule    Taiwan  1960    1961    -       Jun     1       0:00    1:00    D 
Rule    Taiwan  1974    1975    -       Apr     1       0:00    1:00    D 
Rule    Taiwan  1974    1975    -       Oct     1       0:00    0       S 
Rule    Taiwan  1980    only    -       Jun     30      0:00    1:00    D 
Rule    Taiwan  1980    only    -       Sep     30      0:00    0       S 
# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL] 
Zone    Asia/Taipei     8:06:00 -       LMT     1896 # or Taibei or T'ai-pei

                        8:00    Taiwan  C%sT    1992 
                        8:00    -       CST 

# Macau (Macao, Aomen) 
# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE
LETTER/S 
Rule    Macau   1961    1962    -       Mar     Sun>=16 3:30    1:00    S 
Rule    Macau   1961    1964    -       Nov     Sun>=1  3:30    0       - 
Rule    Macau   1963    only    -       Mar     Sun>=16 0:00    1:00    S 
Rule    Macau   1964    only    -       Mar     Sun>=16 3:30    1:00    S 
Rule    Macau   1965    only    -       Mar     Sun>=16 0:00    1:00    S 
Rule    Macau   1965    only    -       Oct     31      0:00    0       - 
Rule    Macau   1966    1971    -       Apr     Sun>=16 3:30    1:00    S 
Rule    Macau   1966    1971    -       Oct     Sun>=16 3:30    0       - 
Rule    Macau   1972    1974    -       Apr     Sun>=15 0:00    1:00    S 
Rule    Macau   1972    1973    -       Oct     Sun>=15 0:00    0       - 
Rule    Macau   1974    1977    -       Oct     Sun>=15 3:30    0       - 
Rule    Macau   1975    1977    -       Apr     Sun>=15 3:30    1:00    S 
Rule    Macau   1978    1980    -       Apr     Sun>=15 0:00    1:00    S 
Rule    Macau   1978    1980    -       Oct     Sun>=15 0:00    0       - 
# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL] 
Zone    Asia/Macau      7:34:20 -       LMT     1912 
                        8:00    Macau   MO%sT   1999 Dec 20 # return to
China 
                        8:00    -       CST 


 

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