I need to be able to calculate a deadline that is x hours from an input datetime. The calculation has to count only business hours (i.e. 8:00 AM to 5:00 PM) and exclude weekends and holidays. For example, if I have a 4 hour deadline, beginning at 3:00 PM on Monday, the deadline should be at 10:00 AM Tuesday. Likewise a 4 hour deadline at 3:00 PM Friday would be due at 10:00 AM Monday. I have UDF's that determine if a day is a weekend or holiday.

TIA

John