Date-time missing from menu bar (Ubuntu 16.10)Posted: May 11, 2017
When I reinstalled Ubuntu 16.10 today, the date and time wasn’t showing up in the menu bar at the top of Unity (I’m going to miss it now that they are planning to stop supporting it in 17.10).
When I clicked on System and Date and Time, everything was correctly set.
The solution comes from here
sudo apt-get install indicator-datetime sudo dpkg-reconfigure --frontend noninteractive tzdata sudo killall unity-panel-service
Of these, really only the last was necessary in my case: the dialogue showed that it was up-to-date and when I rant the
apt-get install is was clearly already installed.