September 2014 - tz - lists.iana.org

Instructions
by luis zavala Sept. 3, 2014

Sept. 3, 2014

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Confusion about links in backward and backzone files
by Jon Skeet Sept. 2, 2014

Sept. 2, 2014

I've just been trying to "compile" the 2014g data into my Noda Time data format, and I've run against a couple of problems due to trying to include both the "backward" and "backzone" files. I'd like to just clarify the intention here, from the perspective of direct consumers of the files providing a service to others. It looks (from a brief look) like everything that's in backzone is also in backward, but the reverse is untrue - so it's not like we should *always* use backwards, but optionally *override* some previous definitions using the data in backzone... so things that would otherwise be defined as aliases may gain full zone rules, and aliases themselves may change (e.g. Antarctica/South_Pole). Is that a fair representation? I suspect that for the moment I just won't include backzone as a data source, with the result of the same set of zone IDs as in 2014f, but more of them being aliases. For most Noda Time users that's probably fine, but I may well want to allow users to use backzone data in the future, so I figure it's worth understanding as early as possible... Jon

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I found a bug in tzdata2014f.tar.gz for Europe/Moscow or similar such as Europe/Volgograd
by azhar saleh Sept. 2, 2014

Sept. 2, 2014

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

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