Comment 12 for bug 1913482

Verification for Bionic:

bdmurray@clean-bionic-amd64:~$ apt-cache policy tzdata
tzdata:
  Installed: 2021a-0ubuntu0.18.04
  Candidate: 2021a-0ubuntu0.18.04
  Version table:
 *** 2021a-0ubuntu0.18.04 500
        500 http://ubuntu.osuosl.org/ubuntu bionic-proposed/main amd64 Packages
        500 http://ubuntu.osuosl.org/ubuntu bionic-proposed/main i386 Packages
        100 /var/lib/dpkg/status
     2020f-0ubuntu0.18.04 500
        500 http://ubuntu.osuosl.org/ubuntu bionic-updates/main amd64 Packages
        500 http://ubuntu.osuosl.org/ubuntu bionic-updates/main i386 Packages
        500 http://ubuntu.osuosl.org/ubuntu bionic-security/main amd64 Packages
        500 http://ubuntu.osuosl.org/ubuntu bionic-security/main i386 Packages
     2018d-1 500
        500 http://ubuntu.osuosl.org/ubuntu bionic/main amd64 Packages
        500 http://ubuntu.osuosl.org/ubuntu bionic/main i386 Packages
bdmurray@clean-bionic-amd64:~$ 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

System V Test Case:

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