(I've also sent this reply directly to Azhar.)
$ date -s "Sun OCT 26 01:59:00 MSK 2014"
Sun Oct 26 01:59:00 MSK 2014 Monitor the date
$ while true; do date; sleep 2; done Sun Oct 26 01:59:57 MSK 2014
Sun Oct 26 01:59:59 MSK 2014 Sun Oct 26 02:00:01 MSK 2014 *ß** Not good. Should move from 01:59:59 to 01:00:00* >
Sun Oct 26 02:00:03 MSK 2014
The situation here is that there are two instants in Moscow in 2014 when wall clocks are to read 1:59:00: one just prior to when clocks are adjusted, and one an hour after that. When you use the date command as above, it must pick which of the two instants to use; here it has picked the second one, so you don't see a clock shift after a couple of seconds. You should be able to verify this by modifying your script to output both Moscow and universal time. @dashdashado On Fri, Aug 29, 2014 at 5:47 AM, azhar saleh <seper5@hotmail.com> wrote:
Hi
Currently I’m preparing a document to update TZ for one of our customer in Russia due to the following TZ rule.
I think I found a bug in *tzdata2014f.tar.gz* where the time did not move from 01:59:59 to 01:00:00
http://www.timeanddate.com/time/change/russia/moscow?year=2014
Using *tzdata2014f.tar.gz*
$ ls -lrt /etc/localtime
lrwxrwxrwx 1 root root 33 Aug 29 13:05 */etc/localtime* -> /usr/share/zoneinfo/Europe/Moscow
$ /usr/sbin/zdump -v /etc/localtime | grep 201
/etc/localtime Sat Mar 27 22:59:59 2010 UTC = Sun Mar 28 01:59:59 2010 MSK isdst=0 gmtoff=10800
/etc/localtime Sat Mar 27 23:00:00 2010 UTC = Sun Mar 28 03:00:00 2010 MSD isdst=1 gmtoff=14400
/etc/localtime Sat Oct 30 22:59:59 2010 UTC = Sun Oct 31 02:59:59 2010 MSD isdst=1 gmtoff=14400
/etc/localtime Sat Oct 30 23:00:00 2010 UTC = Sun Oct 31 02:00:00 2010 MSK isdst=0 gmtoff=10800
/etc/localtime Sat Mar 26 22:59:59 2011 UTC = Sun Mar 27 01:59:59 2011 MSK isdst=0 gmtoff=10800
/etc/localtime Sat Mar 26 23:00:00 2011 UTC = Sun Mar 27 03:00:00 2011 MSK isdst=0 gmtoff=14400
/etc/localtime Sat Oct 25 21:59:59 2014 UTC = Sun Oct 26 01:59:59 2014 MSK isdst=0 gmtoff=14400
/etc/localtime Sat Oct 25 22:00:00 2014 UTC = Sun Oct 26 01:00:00 2014 MSK isdst=0 gmtoff=10800
Set the date to Sun Mar 27, 2011 (*Russia is abolishing DST time)*
$ date -s "Sun MAR 27 01:59:00 MSK 2011"
Sun Mar 27 01:59:00 MSK 2011
Monitor the date
$ while true; do date; sleep 2; done:
:
Sun Mar 27 01:59:57 MSK 2011
Sun Mar 27 01:59:59 MSK 2011
Sun Mar 27 03:00:01 MSK 2011 ß good
Sun Mar 27 03:00:03 MSK 2011
:
Set the date to Sun Oct 26, 2014 (*Russia back to European DST in October 2014)*
$ date -s "Sun OCT 26 01:59:00 MSK 2014"
Sun Oct 26 01:59:00 MSK 2014
Monitor the date
$ while true; do date; sleep 2; done
:
Sun Oct 26 01:59:57 MSK 2014
Sun Oct 26 01:59:59 MSK 2014
Sun Oct 26 02:00:01 MSK 2014 *ß** Not good. Should move from 01:59:59 to 01:00:00*
Sun Oct 26 02:00:03 MSK 2014
:
If I test again using Europe/Moscow for year 2010, it works fine for that year
$ zdump -v Europe/Moscow | grep 2010
Europe/Moscow Sat Mar 27 22:59:59 2010 UTC = Sun Mar 28 01:59:59 2010 MSK isdst=0 gmtoff=10800
Europe/Moscow Sat Mar 27 23:00:00 2010 UTC = Sun Mar 28 03:00:00 2010 MSD isdst=1 gmtoff=14400
Europe/Moscow Sat Oct 30 22:59:59 2010 UTC = Sun Oct 31 02:59:59 2010 *MSD* isdst=1 gmtoff=14400
Europe/Moscow Sat Oct 30 23:00:00 2010 UTC = Sun Oct 31 02:00:00 2010 *MSK* isdst=0 gmtoff=10800
And it works just fine for Europe/Rome for year 2014 as well
$ zdump -v /etc/localtime | grep 2014
/etc/localtime Sun Mar 30 00:59:59 2014 UTC = Sun Mar 30 01:59:59 2014 CET isdst=0 gmtoff=3600
/etc/localtime Sun Mar 30 01:00:00 2014 UTC = Sun Mar 30 03:00:00 2014 CEST isdst=1 gmtoff=7200
/etc/localtime Sun Oct 26 00:59:59 2014 UTC = Sun Oct 26 02:59:59 2014 CEST isdst=1 gmtoff=7200
/etc/localtime Sun Oct 26 01:00:00 2014 UTC = Sun Oct 26 02:00:00 2014 CET isdst=0 gmtoff=3600
Please tell me if it is a bug or something wrong in my testing.
Best Regards
Azhar
Support Engineer
Kuala Lumpur
Malaysia