Comment 9 for bug 1948698

verification of the tzdata update on bionic:

bdmurray@clean-bionic-amd64:~$ zdump -v Asia/Gaza | grep 2021
Asia/Gaza Fri Mar 26 21:59:59 2021 UT = Fri Mar 26 23:59:59 2021 EET isdst=0 gmtoff=7200
Asia/Gaza Fri Mar 26 22:00:00 2021 UT = Sat Mar 27 01:00:00 2021 EEST isdst=1 gmtoff=10800
Asia/Gaza Fri Oct 29 21:59:59 2021 UT = Sat Oct 30 00:59:59 2021 EEST isdst=1 gmtoff=10800
Asia/Gaza Fri Oct 29 22:00:00 2021 UT = Sat Oct 30 00:00:00 2021 EET isdst=0 gmtoff=7200
bdmurray@clean-bionic-amd64:~$ sudo apt-get -qq install tzdata
Preconfiguring packages ...
(Reading database ... 205624 files and directories currently installed.)
Preparing to unpack .../tzdata_2021e-0ubuntu0.18.04_all.deb ...
Unpacking tzdata (2021e-0ubuntu0.18.04) over (2021a-2ubuntu0.18.04) ...
Setting up tzdata (2021e-0ubuntu0.18.04) ...

Current default time zone: 'America/Los_Angeles'
Local time is now: Wed Oct 27 10:21:39 PDT 2021.
Universal Time is now: Wed Oct 27 17:21:39 UTC 2021.
Run 'dpkg-reconfigure tzdata' if you wish to change it.

bdmurray@clean-bionic-amd64:~$ zdump -v Asia/Gaza | grep 2021
Asia/Gaza Fri Mar 26 21:59:59 2021 UT = Fri Mar 26 23:59:59 2021 EET isdst=0 gmtoff=7200
Asia/Gaza Fri Mar 26 22:00:00 2021 UT = Sat Mar 27 01:00:00 2021 EEST isdst=1 gmtoff=10800
Asia/Gaza Thu Oct 28 21:59:59 2021 UT = Fri Oct 29 00:59:59 2021 EEST isdst=1 gmtoff=10800
Asia/Gaza Thu Oct 28 22:00:00 2021 UT = Fri Oct 29 00:00:00 2021 EET isdst=0 gmtoff=7200

And confirmation that the SystemV time zones are still good to go:

bdmurray@clean-bionic-amd64:~$ diff <(zdump -v America/Phoenix | cut -d' ' -f2-) <(zdump -v SystemV/MST7 | cut -d' ' -f2-)
bdmurray@clean-bionic-amd64:~$