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 AzharSupport EngineerKuala LumpurMalaysia