Hi,
Try this for starters:
Define a vertical range "Holidays" and include several holiday dates in ascending order.
Enter your start date in cell A2.
The basic formula for entering workdays (Mon-Fri) below A2 would be:
=IF(WEEKDAY(A2+1)=7,A2+3,A2+1)
You can checkout WEEKDAY in Excel Help
To accomodate the holidays this would need to be expanded with a vlookup to the following in cell A3 and then copied down:
=IF(ISNA(VLOOKUP(IF(WEEKDAY(A2+1)=7,A2+3,A2+1),Holidays,1,FALSE)),IF(WEEKDAY(A2+1)=7,A2+3,A2+1),IF(WEEKDAY(A2+1)=7,A2+3,A2+1)+1)
This is limited to not having consecutive workdays as holidays in the holiday list, otherwise it becomes further complicated.
See how this looks and lets know if you need further help.
Good Luck!
Peter Moran