I suggest the clock app to inherit the preference in the Settings app, rather than having a specific in app setting.
Systems settings bug here https://bugs.launchpad.net/bugs/1392699 ** Changed in: ubuntu-ux Status: Triaged => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1388931 Title: [clock] No setting for 12h or 24h clock format any more To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-clock-app/+bug/1388931/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs