All,

I need some help sorting out a problem with dates.

In G8: 12/31/1995 (serial value of: 35064)
G9, has the formula: =DATE(YEAR(G8),MONTH(G8)+2,1)-1 and yields #NUM!
(the purpose of the formula is to give me the last day of the next
month)

If I copy these two cells into a new workbook, I get the desired,
1/31/1996.

What could be causing this erratic behavior with my excel? The
workbook that I am modifying was created originally in Excel '97

Thanks!

Jonathan