Try =DATE(YEAR(A1),MONTH(A1)+1,0)+1
The first part =DATE(YEAR(A1),MONTH(A1)+1,0) find the last day of the month
of the date in A1. Adding one does what you want.

best wishes

--
Bernard V Liengme
www.stfx.ca/people/bliengme
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"faberk" wrote in message
...
I am trying to construct a formula to return the first day of the next
month:

08-01-1969 = 09-01-1969
11-09-1960 = 12-01-1960
12-01-1970 = 01-01-1971

I dont have a problem with the first two. I use the month function and
increment it by one. This works fine until i run into a date in december.
How can i do this?