Hi Rob,

While the function uses some nifty tricks (I particularly like the trick to get correct results regardless of datefirst setting; this is a new trick for me), I'd never recommend using this function to anyone.

There are other ways to achieve this. Ways that are, in my opinion, better. Check out http://www.aspfaq.com/show.asp?id=2519, and especially the section titled "Pre-determine delivery dates".

Best, Hugo