I am running Ubuntu 18.04.3 and changes I make to the timezone do not persist. That is, I make the change and at some point within 5-20 minutes, the clock reverts to UTC time.
I have updated the timezone using the GUI and also via the command line:
sudo timedatectl set-timezone "Pacific/Auckland" sudo dpkg-reconfigure -f noninteractive tzdata
I've also played around with the "Automatic Date/Time" and "Automatic Timezone" settings and it doesn't make any difference whether they're on or off.
I can't find a report for anything similar when searching for this issue online.
Any suggestions for how to investigate or fix this would be appreciated.