For some strange reason, additional timezones cannot be added to the clock using the date-time indicator in Gnome Classic (Ubuntu 12.04). I used Unity before I switched to Gnome Classic, and it was possible to add more timezones. Even in Gnome Classic I can see the other timezones in the menu of the date-time indicator which I added when I was still using Unity. When I go to System Settings > Date and Time, there is no option for adding other timezones. How can I set additional timezones in Gnome Classic?
Ubuntu – How to set multiple timezones in Gnome Classic
gnome-classicindicatortimezone
Best Answer
background
The unity-indicator as you may have gathered does not have the same capabilities as Unity. The developers have patched the gnome-libraries to give this integration. However - by design - they have left the Gnome-Shell & Gnome-Classic desktops as vanilla as possible. This is by expression wish by the gnome-developers.
Thus you will need a slightly more inventive solution - this answer will give you one such suggestion.
use the clock applet
Temporarily add the clock applet to the panel.
Find your location by clicking edit in the applet
Next look carefully at the locations:
The value you are interested in is timezone city
In this example:
Next fire up
dconf-editor
dconf-tools
Look at the locations field as shown and add your new location(s) - each entry is in the format
,'timezone city'
i.e. separate entries with commasYou then will automatically update your date-time indicator. You can finish off by deleting the clock applet.