At the moment I'm using this:-
$Date(<Last Played>,dd/mm/yy) - CREDIT to Redwing
For the unknown part, you could try:
$IsNull(<Last Played>,"UNKNOWN",$Date(<Last Played>,dd/mm/yy))That won't work as <Last Played> never returns a null value.
If <Last Played> has no value it already returns
UnknownSo if you want it in capitals:
$If(<Last Played>="Unknown","UNKNOWN",$Date(<Last Played>,dd/mm/yyy))