Add workdays to date custom weekends

To add or subtract workdays days to a date so that you can calculate a date in the future or past that skips weekends (customized) and holidays , you can use the WORKDAY.INTL function. Holidays and weekend are both optional.

In the example, the formula in D6 is:

=WORKDAY.INTL(B6,C6,11,B9:B11)

This formula adds 7 workdays days to Tuesday, Dec 22. Three holidays are supplied and weekends are set using 11 for the weekend argument, which means "Sunday only". The result is Wednesday, December 30, 2015.

Explanation

By default, the WORKDAY.INTL function will exclude weekends (Saturday and Sunday). In this case, however, we have supplied 11 for this argument, which means "Sunday only" (see: full list weekend codes).

We have also supplied a list of 3 holidays that all fall in the date range being calculated, which means that the holidays and Sundays will be excluded. The following table shows which dates are excluded with and without holidays provided (exluded dates are shaded gray). The final dates returned by WORKDAY are highlighted in yellow.

No holidays	Holidays provided
Wed, 23-Dec-2015	Wed, 23-Dec-2015
Thu, 24-Dec-2015	Thu, 24-Dec-2015
Fri, 25-Dec-2015	Fri, 25-Dec-2015
Sat, 26-Dec-2015	Sat, 26-Dec-2015
Sun, 27-Dec-2015	Sun, 27-Dec-2015
Mon, 28-Dec-2015	Mon, 28-Dec-2015
Tue, 29-Dec-2015	Tue, 29-Dec-2015
Wed, 30-Dec-2015	Wed, 30-Dec-2015
Thu, 31-Dec-2015	Thu, 31-Dec-2015
Fri, 01-Jan-2016	Fri, 01-Jan-2016
Sat, 02-Jan-2016	Sat, 02-Jan-2016
Sun, 03-Jan-2016	Sun, 03-Jan-2016