Hi Daniel
Your not giving any cell reference.
So...
Networkdays
This function will calculate the number of working days between two dates.
It will exclude weekends and any holidays.
Syntax
=NETWORKDAYS(StartDate,EndDate,Holidays)
Holidays : This is a list of dates which will be excluded from the calculation, such as Xmas.
Example:
A1 B1 C1
3/1/20114/6/2011answer 27
=NETWORKDAYS(B28,C28,C30:C42)
C30:C42 is a list of holiday dates you would type in.
These
functions show #NAME if the Analysys
Toolpak is not installed.



HTH
John