[tz] The rules of DST at Shanghai need some modifications
Hong Xie
i at zizicici.com
Mon Aug 20 03:39:25 UTC 2018
The existing rules of DST at Shanghai is
# 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 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
There are a news record about the DST in China:
http://bjrb.bjd.com.cn/html/2017-08/25/content_169986.htm
The accurate hour of DST at China is 02:00.
For Example, In 1986, the start time of DST at China is 02:00 May 4 1986. The
end time of DST at China is 02:00 Sep 14 1986.
So the rule should be modified to:
# 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 1986 only - May 4 2:00 1:00 D
> Rule PRC 1986 1991 - Sep Sun>=11 2:00 0 S
> Rule PRC 1987 1991 - Apr Sun>=10 2:00 1:00 D
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