A.=OR(AND(MOD(YEAR(TODAY()),4)=0,MOD(YEAR(TODAY()),100)<>0),MOD(YEAR(TODAY()),400)=0)
B.=MID(OR(MOD(YEAR(TODAY()),4)=0,MOD(YEAR(TODAY()),100)<>0),MOD(YEAR(TODAY()),400)=0)
C.=OR(AND(MOD(YEAR(TODAY()),4)<>0,MOD(YEAR(TODAY()),100)=0),MOD(YEAR(TODAY()),400)=0)
D.=AND(OR(MOD(YEAR(TODAY()),4)<>0,MOD(YEAR(TODAY()),100)=0),MOD(YEAR(TODAY()),400)=0)