Excel doesn't use a list of holidays. You have to provide the list of dates
yourself. For example, if cells A1:A10 contain the list of holidays, you
would use a formula like
=NETWORKDAYS(start,end,A1:A10)
If you don't provide a list of holidays, then holidays are not used in
calculating the number of days.
--
Cordially,
Chip Pearson
Microsoft MVP - Excel
Pearson Software Consulting, LLC
www.cpearson.com (e-mail address removed)