If you have a date:

A1 = some date like 4/12/2007 (April 12 2007)

=DAY(DATE(YEAR(A1),MONTH(A1)+1,0))

Returns 30

Biff

"dipsy" wrote in message
...
I know the month and want a formula that will tell me number of days in the
month. For example, April would be 30 days and May would be 31 days.