I like having a clock showing the current time and date in the menu bar, but this morning when I logged in it's not there anymore. Everything under System Settings > Time & Date > Clock is greyed out. Ubuntu 13.10 64-bit.
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sudo killall unity-panel-service
. – Lilley Feb 25 '14 at 07:15> dpkg-reconfigure --frontend noninteractive tzdata
......> sudo restart lightdm
rebooted the system with nochange after reboot. – Cbhihe Jun 23 '15 at 09:37