Menu Bar Time Disappeared
Solution 1:
For me, this make the clock, time, date come back to menu bar: killall unity-panel-service
Solution 2:
I just had this problem while I was also dealing with another bug to do with my keyboard layout changing spontaneously, and the fix for that also brought back my time and date display.
Try the following command:
sudo restart lightdm
Seemed to work for me, anyway. Hope this helps.
Solution 3:
You need to add the panel "indicator" for date and time back by running:
sudo apt-get install indicator-datetime
That will restore the time readout on the top panel for you.
Solution 4:
As someone pointed out, I typed:
initctl restart indicator-datetime
and it worked fine.