Fix date time missing in the menu bar in Ubuntu 14.04

There are few solutions to fix this issue.

Solution 1:

First solution is to restart lightdm. This will log you out of the current session:

sudo restart lightdm

Solution 1:

Second Solution Open a terminal and use the command given below. This is optional and just to make sure that you have the indicator installed already.

sudo apt-get install indicator-datetime
Once we have made sure that the indicator is installed, next step is to reconfigure it:

sudo dpkg-reconfigure --frontend noninteractive tzdata
And the last step is to restart Unity:

sudo killall unity-panel-service
That should be it. Now the date time should be appearing in the top panel.