How can I set the clock to 24 hour mode? [closed]

How can I set the clock to global (24h time) in Maverick instead of am/pm? Including the login screen?

I mean there's no option to do that in rclick clock > preferences or in system > admin > time & date.

Solution 1:

The normal way :

• Go to System -> Administration -> Language Support
• On the Text Tab, choose your prefered language to display numbers, dates, ...

The advanced way for your Desktop Applet :

• Press Alt+F2
• Type: gconf-editor & Hit return
• Navigate to “Apps > Panel > Applets > Clock_Screen0 > Prefs”
• Double-click on the ‘Format’ value. Change it to ‘24-hour'

Login Screen

There was an option in Ubuntu previous versions in the GDM setup GUI (System > Admin > Login Window) but not in maverick, bug is reported on Launchpad