Change in Mongolian daylight saving time
ganbold at micom.mng.net
Sat Apr 17 07:15:51 UTC 2004
At 02:20 PM 17.04.2004, you wrote:
>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.
Yes, I agree.
>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.
I don't remember when daylight savings started in 2001. Probably it was on
Maybe McDow is confused about the day. Usually daylight saving started last
Saturday 2:00AM by local
Mongolian time. It means 6:00PM by GMT/UTC Friday.
>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.
>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.
I agree with it. One more question, maybe this is off topic. How to make
time synchronization? I installed ntp daemon which makes synchronization from
some public time servers. However because of daylight saving time it is
still off by 1 hour.
That's why I started looking at /usr/src/share/zoneinfo/asia file and found
out wrong rules for Mongolia.
Can you give me some advice and solution to make time synchronization which
counts daylight saving?
thanks in advance,
More information about the tz