Thanks. Surely I am not the only one to come up with a one-line check, though.

>I wasn't aware of the INLIST function...
>
>This is a cool implementation of it...
>
>Joe
>
>>dDate = a Date variable
>>MOD(YEAR(dDate),4)=0 AND !(INLIST(MOD(YEAR(dDate),400),300,200,100))
>>
>>
>>>I need a function to calculate leap years. Any suggestions? Thanks,
>>>
>>>Raef