Assuming your dates are in cells A1 to A1000:

=SUMPRODUCT((A1:A1000=DATE(2006,6,6))*(A1:A1000<= DATE(2006,6,18)))

Regards

Trevor


"hoyt" wrote in message
...
i have a column which shows the date that a task is complete, what i want
is
a formula to show how many times the task has beem completed in a week.
for
example if the column had the date 12/6/6 three times and the date 15/6/6,
seven times then between 12/6/6 & 18/6/6 the task has been completed ten
times.

is this possible, any ideas?

thanks