Change in Mongolian daylight saving time
eggert at twinsun.com
Sat Apr 17 05:20:31 UTC 2004
At Sat, 17 Apr 2004 11:30:25 +0900, Ganbold <ganbold at micom.mng.net> writes:
> Last time the rule was changed in 2001 only.
Thanks for the clarification.
The current tz data for Mongolia in 2001 relies on this comment:
# From Rives McDow (2001-05-13):
# In addition to Mongolia starting daylight savings as reported earlier
# (adopted DST on 2001-04-27 02:00 local time, ending 2001-09-28),
This conflicts with the rules that you mentioned, in two ways.
First, according to McDow the 2001 daylight-saving began on April 27,
which was a Friday, not a Saturday; and daylight-saving ended on
the last Friday in September, not the last Saturday.
It's possible that McDow's informant got confused about Friday versus
Saturday; it wouldn't be the first time that this has happened. But
the part about the end of April sounds plausible -- it's quite common
for countries to start daylight-saving late their first year. So,
unless you disagree, I'm inclined to change the rules to be the
Rule Mongol 2001 only - Apr lastSat 2:00 1:00 S
Rule Mongol 2001 max - Sep lastSat 2:00 0 -
Rule Mongol 2002 max - Mar lastSat 2:00 1:00 S
i.e., from the last Saturday in March at 02:00 to the last Saturday in
September in 02:00, except that in 2001 it didn't start until the last
Saturday in April.
More information about the tz