Hi Robert,

I think I have a solution for you..
I assumed the values you were lookign to sum are in Column B of Sheet 1
where the dates are stored.

Try the following formula in Sheet 2 col B and replicate down to all the
associated rows next to the month Summaries:
{=SUM((MONTH(Sheet1!$A$2:$A$366) = MONTH(Sheet2!A2))*Sheet1!$B$2:$B$366)}


Note: the {} brackets indicate that it is an array formula. You do not
include them in the cell but are automatically included when you use the Ctr
+ Shift + Enter Key.
Sorry if you already know this..

Also, this does not distinguish between different years. You could add the
same logic to do that.

Hope this helps..

GG

"Robert Gillard" wrote:

On worksheet1, I have a several columns (A-M) one of which (colA) is the
daily date in the format of 21-Nov-2004 so by the end of a year there will
be approx 365 rows.

On worksheet2, there is a single row monthly summary of the above data (so
sheet1 has approx 30 rows per month while worksheet2 has a one row summary)
where the date on this second worksheet is headed as
Month Begining
(A1) 01-Nov-2004,
(A2) 01-Dec-2004,
(A3) 01-Jan-2005

I now need reference a date from sheet1 to the summary on sheet2, so if I
input 12-Jan-2005 on sheet1, I need to have the monthly summary row from
sheet2 to infill.

So if I input any date from 1Jan to 31Jan then it would return the same row
from sheet2 in this example Month Begining 01-Jan-2005.

Could anybody help in this regard,

With Thanks

Bob