gworldclock
The time zones may be entered by hand in TZ format or chosen from a list prepared from /usr/share/zoneinfo/zone.tab. The zone list is kept in a format consistent with the shell script tzwatch.
Latest reviews
Works great for me! For example, from the Options menu, select Add Time Zone, then select Asia under the Continents tab, then India under Countries tab, and then under the Regions tab select the city Kolkata (the only city showing since there is one time zone for all of India). Then click the button Add Zone and a new line shows up in the main display with the correct time, correctly labeled IST. Click Done. If you Quit the app before saving your modified time zone list, it warns you. I added a number of other time zones, all were correct. You can grab and move a time zone to place it where you want. Linux Mint 20.3 Cinnamon
Does not work on modern Mint. The timezones are not complete and not properly named (I.E. it doesn't have India Standard Time). The selection screen is broken: Clicking a zone doesn't add it.
Simple but useful when you need it. Too bad that it ignores the locale settings for its interface.
It's awesome, Like it says it lists all the time zones you want, but I like that you can customize it. Even name the zones based on your friend's name who lives there.
Allows you to view a list of time zones you choose so you can customize it to your needs slightly, which is helpful for me. Can be viewed in 24 or 12 hr format with date. Simple program that works as asdvertised.