Comment 13 for bug 1913482

Verification for Xenial:

(xenial-amd64)root@impulse:~# apt-cache policy tzdata
tzdata:
  Installed: 2021a-0ubuntu0.16.04
  Candidate: 2021a-0ubuntu0.16.04
  Version table:
 *** 2021a-0ubuntu0.16.04 500
        500 http://ubuntu.osuosl.org/ubuntu xenial-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     2020f-0ubuntu0.16.04 500
        500 http://ubuntu.osuosl.org/ubuntu xenial-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
     2016d-0ubuntu0.16.04 500
        500 http://ubuntu.osuosl.org/ubuntu xenial/main amd64 Packages
(xenial-amd64)root@impulse:~# zdump -v Africa/Juba | grep 2021
Africa/Juba Sun Jan 31 20:59:59 2021 UT = Sun Jan 31 23:59:59 2021 EAT isdst=0 gmtoff=10800
Africa/Juba Sun Jan 31 21:00:00 2021 UT = Sun Jan 31 23:00:00 2021 CAT isdst=0 gmtoff=7200
(xenial-amd64)root@impulse:~# diff <(zdump -v America/Phoenix | cut -d' ' -f2-) <(zdump -v SystemV/MST7 | cut -d' ' -f2-)
(xenial-amd64)root@impulse:~#