add occurrences by month

I have a lists of occurrences that are dates 4/1/2009 , 5/26/2009 etc. My problem is I have some #N/A because these are shipments that have not left yet. I need to add up all the dates to see how many shipments went out that month these are pulled in by a vlookup.

So
January 10
Febuaury 26
Etc...


Thanks for anyone who spends anytime on this!
Travis

Try this ARRAY formula

=SUM(IF(NOT(ISNA($A$8:$A$1000)),IF(TEXT($A$8:$A$1000,"mmmm")=$B2,1)))

Thanks it worked! I did have a extra space after March and it did bring back 0, but once I delete that extra space it worked great!