No data for Africa/Cairo 2011

[Harry Roberts]

It doesn't look like the tzdata is up-to-date despite being the most up-to-date Ubuntu package.

Debian 6 contains data for 2011
debian6$ zdump -v /usr/share/zoneinfo/Africa/Cairo | grep 2011
/usr/share/zoneinfo/Africa/Cairo Thu Apr 28 21:59:59 2011 UTC = Thu Apr 28 23:59:59 2011 EET isdst=0 gmtoff=7200
/usr/share/zoneinfo/Africa/Cairo Thu Apr 28 22:00:00 2011 UTC = Fri Apr 29 01:00:00 2011 EEST isdst=1 gmtoff=10800
/usr/share/zoneinfo/Africa/Cairo Thu Sep 29 20:59:59 2011 UTC = Thu Sep 29 23:59:59 2011 EEST isdst=1 gmtoff=10800
/usr/share/zoneinfo/Africa/Cairo Thu Sep 29 21:00:00 2011 UTC = Thu Sep 29 23:00:00 2011 EET isdst=0 gmtoff=7200

No data for for 2011
ubuntu10.04$ zdump -v /usr/share/zoneinfo/Africa/Cairo | grep 2011

But contains data for 2010:
ubuntu10.04$ zdump -v /usr/share/zoneinfo/Africa/Cairo | grep 2010
/usr/share/zoneinfo/Africa/Cairo Thu Apr 29 21:59:59 2010 UTC = Thu Apr 29 23:59:59 2010 EET isdst=0 gmtoff=7200
/usr/share/zoneinfo/Africa/Cairo Thu Apr 29 22:00:00 2010 UTC = Fri Apr 30 01:00:00 2010 EEST isdst=1 gmtoff=10800
/usr/share/zoneinfo/Africa/Cairo Tue Aug 10 20:59:59 2010 UTC = Tue Aug 10 23:59:59 2010 EEST isdst=1 gmtoff=10800
/usr/share/zoneinfo/Africa/Cairo Tue Aug 10 21:00:00 2010 UTC = Tue Aug 10 23:00:00 2010 EET isdst=0 gmtoff=7200
/usr/share/zoneinfo/Africa/Cairo Thu Sep 9 21:59:59 2010 UTC = Thu Sep 9 23:59:59 2010 EET isdst=0 gmtoff=7200
/usr/share/zoneinfo/Africa/Cairo Thu Sep 9 22:00:00 2010 UTC = Fri Sep 10 01:00:00 2010 EEST isdst=1 gmtoff=10800
/usr/share/zoneinfo/Africa/Cairo Thu Sep 30 20:59:59 2010 UTC = Thu Sep 30 23:59:59 2010 EEST isdst=1 gmtoff=10800
/usr/share/zoneinfo/Africa/Cairo Thu Sep 30 21:00:00 2010 UTC = Thu Sep 30 23:00:00 2010 EET isdst=0 gmtoff=7200

The one that works:
debian6$ dpkg -s tzdata
Package: tzdata
Status: install ok installed
Priority: required
Section: libs
Installed-Size: 6308
Maintainer: GNU Libc Maintainers <email address hidden>
Architecture: all
Version: 2011d-0squeeze1
Doesn't work:

ubuntu10.04$ dpkg -s tzdata
Package: tzdata
Status: install ok installed
Priority: required
Section: libs
Installed-Size: 6244
Maintainer: Ubuntu Developers <email address hidden>
Architecture: all
Version: 2011j-0ubuntu0.10.04

[Benjamin Drung (bdrung)]

Thank you for taking the time to report this bug and helping to make Ubuntu better.

I compared the upstream release 2011d to 2011j and found the relevant change: https://github.com/eggert/tz/commit/7bf85c80a63f31e97134d75313736b792bcd94c6

According to that commit Egypt abandoned DST in 2011. So not having any offset change (caused by DST) for 2011 is correct. Let me know in case this DST change did not happen in 2011.