[Bug 1222345] Re: Wrong DST dates in Israel

[itsadok]

Yaron, you're right. I mistakenly assumed that zdump accepts a file
name, but its parameters are actually zone names, and it always reads
from /usr/share/zoneinfo.

After running dpkg -i tzdata_2013d-1ubuntu1_all.deb the situation is
resolved.

$ wget http://archive.ubuntu.com/ubuntu/pool/main/t/tzdata/tzdata_2013d-1ubuntu1_all.deb
$ dpkg -i tzdata_2013d-1ubuntu1_all.deb
$ ls -l /usr/share/zoneinfo/Asia/{Tel,Jer}*
lrwxrwxrwx 1 root root 9 Aug  2 11:32 /usr/share/zoneinfo/Asia/Jerusalem -> ../Israel
lrwxrwxrwx 1 root root 9 Aug  2 11:32 /usr/share/zoneinfo/Asia/Tel_Aviv -> ../Israel
$ zdump -v Asia/Jerusalem | grep '2013\|2014'
Israel  Thu Mar 28 23:59:59 2013 UTC = Fri Mar 29 01:59:59 2013 IST isdst=0 gmtoff=7200
Israel  Fri Mar 29 00:00:00 2013 UTC = Fri Mar 29 03:00:00 2013 IDT isdst=1 gmtoff=10800
Israel  Sat Oct 26 22:59:59 2013 UTC = Sun Oct 27 01:59:59 2013 IDT isdst=1 gmtoff=10800
Israel  Sat Oct 26 23:00:00 2013 UTC = Sun Oct 27 01:00:00 2013 IST isdst=0 gmtoff=7200
Israel  Thu Mar 27 23:59:59 2014 UTC = Fri Mar 28 01:59:59 2014 IST isdst=0 gmtoff=7200
Israel  Fri Mar 28 00:00:00 2014 UTC = Fri Mar 28 03:00:00 2014 IDT isdst=1 gmtoff=10800
Israel  Sat Oct 25 22:59:59 2014 UTC = Sun Oct 26 01:59:59 2014 IDT isdst=1 gmtoff=10800
Israel  Sat Oct 25 23:00:00 2014 UTC = Sun Oct 26 01:00:00 2014 IST isdst=0 gmtoff=7200

So all that is needed is backporting the package to older ubuntu
versions.

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https://bugs.launchpad.net/bugs/1222345

Title:
  Wrong DST dates in Israel

Status in “tzdata” package in Ubuntu:
  Confirmed

Bug description:
  DST start/end times were changed during 2013, DST should only end in
  more than a month from the actual change happened.

  In order to solve this bug the tzdata package should be updated to the
  most recent version (currently tzdata 2013d-1) which contains the fix.

  Please notice the tzdata has no dependencies but tzdata-java which
  also needs to be updated (both versions are already updated in Debian
  testing).

  This is pretty urgent, releases not affected:
  Saucy Salamander (13.10), all others are affected.

  The change is described in the following diff:
  http://launchpadlibrarian.net/146460855/tzdata_2013c-2ubuntu1_2013d-1ubuntu1.diff.gz

  The updated packages from Debian were installed in my personal system
  (12.04) and nothing seems broken so far, the package deployment was
  successful.

  
  SRU Template starts here:
  [Impact] 

   * DST ends prematurely causing Ubuntu systems to work with a 1 hour
  diff, the actual change should take place on October 27th.

   * tzdata was updated accordingly, time difference could cause many
  issues.

   * tzdata was changes this June, fix was included in this release by
  Ephraim Silverberg  on 2013-06-27.

  [Test Case]

   * All of the affected systems are one hour behind.

  [Regression Potential]

   * This change could possibly solve other issues as well (regarding
  different timezone changes around the world).

   * I only have 12.04 system so I checked the packages on my system and
  nothing is broken AFAICT.

   * Please notice tzdata and tzdata-java are dependent of one another
  but besides that they have no other dependencies.

  [Other Info]
   
   * Anything else you think is useful to include
   * Anticipate questions from users, SRU, +1 maintenance, security teams and the Technical Board
   * and address these questions in advance

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