The NETWORKDAYS function is part of the Analysis Tool Pak. In 2003 and
earlier, you need to go to the Tools menu, choose Add-Ins and select
that item in the list. If you don't want to use the ATP, I have an
improvement to NETWORKDAYS that doesn't use the ATP at http://www.cpearson.com/Excel/BetterNetWorkDays.aspx
Cordially,
Chip Pearson
Microsoft MVP
Excel 1998 - 2010
Pearson Software Consulting, LLC www.cpearson.com
[email on web site]
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