Unity Clock Missing

As per the comments above I've fixed this issue on my brand new 14.04 LTS installation by running.

$ pkill -f indicator-datetime-service

The clock came straight back.

Open a terminal window (Ctrl+Alt+T), then run the following:

killall unity-panel-service

This command should reset the panel, and hopefully reactivate the clock indicator.

This could be one of two things, either the clock isn't installed, or a setting has been flipped to turn it off.

First make sure the clock is installed by making sure indicator-datetime is installed:

Then log out and back in. If it's already installed and it's still not showing up, try the options here:

• How to make the date appear next to the time indicator in Gnome Classic?

If that still doesn't work update your question with the results, thanks!