Thanks for the assistance, it now works without error. Hope I can pass along
similar help someday!

Matt

"Sloth" wrote:

Good problem solving, I didn't realise you had blank cells. Try these
formulas.

=SUMPRODUCT(--(MONTH(range)=1),1-(ISBLANK(range)))
or
=SUMPRODUCT(--(MONTH(range)=1),--(ISNUMBER(range)))

"Matt7102" wrote:

I just figured out that the cell range is 130 cells, and entering any date
reduces the <blank cell count by one- Jan formula is counting blank cells
perhaps?

"Sloth" wrote:

I have no idea why it wouldn't be working. I made a small list to test that
worked fine. Can you show the list, formulas, and results? Is it giving an
error, or the wrong value? What value does the formula produce? What value
should it be?

"Matt7102" wrote:

Thanks for the help, and the short tutorial on explaining the formula
function... however, using a smaller dataset to test, the formula does not
return the correct result for January. Works fine for all other months.
When I add a date in the range other than January to the test dataset, (or
delete an existing) all is well for the month altered. January is just NOT
working...any ideas?

"Sloth" wrote:

It turns an array of logical terms into 1's and 0's. This way they can be
summed (TRUE/FALSE is ignored when summing).

Example:
{TRUE,TRUE,FALSE,TRUE}-{1,1,0,1}

NOTE: The formula is missing a close parenthesis and should be

=SUMPRODUCT(--(MONTH(P2:AB659)=1))

"Bean123r" wrote:

What is the purpose/meaning of the double dash (--) in this formula?

Thanks

"Sloth" wrote:

=SUMPRODUCT(--(MONTH(P2:AB659)=1)

change the 1 to the month number you want to count (ie. Jan=1, Feb=2, Mar=3,
etc.)

"Matt7102" wrote:

I seek help to find a formula to do the following:
I have a range (P2:AB659) that is populated with dates entered 1/16/06
format and displayed as 6-Jan format. I need to count the number of cells
containing any date in January, any date in February, etc.

TIA, Matt