By default settings of elementary OS Freya, it only shows the time zone that was entered at the time of installation. While this should be OK for many, I think multiple time zones come in handy in these days where people travel long distances and often out of local time zone, it is a basic need for the PC to show time from different zones.
This guide will walk you through the steps to set up multiple time zones in elementary OS Freya.
We will be using Dconf editor that activates several powerful features on your elementary OS.
Launch ‘Terminal’ and enter these commands one-at-a-time to install the Nautilus Dconf tools.
sudo apt-get update
sudo apt-get install nautilus dconf-tools
Go to ‘Applications’ and launch ‘dconf-editor’.
In the left pane of the dconf editor, go to ‘com>canonical>indicator>datetime’ and then in the right hand pane, check the boxes ‘show-calendar’, ‘show-clock’, and ‘show locations’. Finally, double-click in ‘locations’ and add your preferred time zones separated by commas and with in single quotes.
You should immediately see the new time zones added to the clock.