Public bug reported: Ubuntu 16.04 LTS amd64 libc-bin 2.23-0ubuntu3 tzdata 2016d-0ubuntu0.16.04
The Africa/Casablanca and Africa/El_Aaiun time zones in the 2016d- 0ubuntu0.16.04 tzdata package have transitions from daylight savings to standard time at 02:00 UTC on 2037-10-04 (see https://github.com/eggert/tz/blob/2016d/africa#L892). The time zone files (/usr/share/zoneinfo/Africa/Casablanca and /usr/share/zoneinfo/Africa/El_Aaiun) both contain the correct transition time (Unix timestamp 0x7f72de20) in the 32-bit and 64-bit sections: $ hd -s 0x1b8 -n 4 /usr/share/zoneinfo/Africa/Casablanca 000001b8 7f 72 de 20 |.r. | 000001bc $ hd -s 0x59d -n 8 /usr/share/zoneinfo/Africa/Casablanca 0000059d 00 00 00 00 7f 72 de 20 |.....r. | 000005a5 $ hd -s 0x18c -n 4 /usr/share/zoneinfo/Africa/El_Aaiun 0000018c 7f 72 de 20 |.r. | 00000190 $ hd -s 0x506 -n 8 /usr/share/zoneinfo/Africa/El_Aaiun 00000506 00 00 00 00 7f 72 de 20 |.....r. | 0000050e However zdump (from libc-bin 2.23-0ubuntu3) incorrectly shows that the transitions for both time zones occur on 2037-10-25 instead of 2037-10-04: $ zdump -v -c 2037,2038 /usr/share/zoneinfo/Africa/Casablanca | grep Oct /usr/share/zoneinfo/Africa/Casablanca Sun Oct 25 01:59:59 2037 UT = Sun Oct 25 02:59:59 2037 WEST isdst=1 gmtoff=3600 /usr/share/zoneinfo/Africa/Casablanca Sun Oct 25 02:00:00 2037 UT = Sun Oct 25 02:00:00 2037 WET isdst=0 gmtoff=0 $ zdump -v -c 2037,2038 /usr/share/zoneinfo/Africa/El_Aaiun | grep Oct /usr/share/zoneinfo/Africa/El_Aaiun Sun Oct 25 01:59:59 2037 UT = Sun Oct 25 02:59:59 2037 WEST isdst=1 gmtoff=3600 /usr/share/zoneinfo/Africa/El_Aaiun Sun Oct 25 02:00:00 2037 UT = Sun Oct 25 02:00:00 2037 WET isdst=0 gmtoff=0 The copy of zdump.c released with glibc 2.23 is identical to zdump.c in the tzcode2015g release from the IANA Timezone Database (https://www.iana.org/time- zones/repository/releases/tzcode2015g.tar.gz). I have compiled the IANA Timezone Database 2015g version of zdump with the default options and it produces the correct results for the Ubuntu- distributed Africa/Casablanca and Africa/El_Aaiun time zone files: $ ~/tz/2015g/zdump --version zdump (tzcode) 2015g $ ~/tz/2015g/zdump -v -c 2037,2038 /usr/share/zoneinfo/Africa/Casablanca | grep Oct /usr/share/zoneinfo/Africa/Casablanca Sun Oct 4 01:59:59 2037 UT = Sun Oct 4 02:59:59 2037 WEST isdst=1 gmtoff=3600 /usr/share/zoneinfo/Africa/Casablanca Sun Oct 4 02:00:00 2037 UT = Sun Oct 4 02:00:00 2037 WET isdst=0 gmtoff=0 $ ~/tz/2015g/zdump -v -c 2037,2038 /usr/share/zoneinfo/Africa/El_Aaiun | grep Oct /usr/share/zoneinfo/Africa/El_Aaiun Sun Oct 4 01:59:59 2037 UT = Sun Oct 4 02:59:59 2037 WEST isdst=1 gmtoff=3600 /usr/share/zoneinfo/Africa/El_Aaiun Sun Oct 4 02:00:00 2037 UT = Sun Oct 4 02:00:00 2037 WET isdst=0 gmtoff=0 ** Affects: glibc (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1587128 Title: zdump returns incorrect transitions for Africa/Casablanca and Africa/El_Aaiun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1587128/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
