If statement returning 0/01/1900

Hi Benishiryo, If C6 is 30 Aug 13 & Main!T2 is 29 Aug 13 -> should return T2
when C6 is 30 Aug 13 & Main!T2 is 30 Aug 13 should return T2
when C6 is 30 Aug 13 & Main!T2 is 31 Aug 13 should return 0