My preference is to use two countif functions for each range. For example,
to count the dates in January 2009, I'd count all those on or after Jan 1 09
and subtract the count of those on or after Feb 1 09:
=countif(range,"=" & date(2009,1,1)) - countif(range,"=" & date(2009,2,1))

"richzip" wrote:

I have a spreadsheet where there are several cells, each containing a date.
I would like to set up a formula that counts how many of thsoe cells contain
dates within each month. So, I want to count the number of cells that
contain dates from 1/1-1/31, 2/1-2/28, etc.