I've done a search but didn't find exactly what I need. From the startdate field I need to calculate: If the month of the startdate is 1,2, or 3 then show ("yyyy",[startdate] & "1", if the month is 4,5, or then ("yyyy,[startdate]& "2", or if the month is 7,8 or 9 then ("yyyy",[startdate] & "3"...