For those who hate rebooting/relogging: killall unity-panel-service
If doesn't work:
/usr/lib/x86_64-linux-gnu/indicator-datetime/indicator-datetime-service killall unity-panel-service
or
/usr/lib/x86_64-linux-gnu/indicator-session/indicator-session-service killall unity-panel-service
For those who hate rebooting/ relogging:
killall unity-panel-service
If doesn't work:
/usr/lib/ x86_64- linux-gnu/ indicator- datetime/ indicator- datetime- service
killall unity-panel-service
or
/usr/lib/ x86_64- linux-gnu/ indicator- session/ indicator- session- service
killall unity-panel-service