Allow for exclusion of weekends/holidays in datediff calc

Who would benefit?

anyone currently needing to do this calc in xls

What impact would it make?

all of my data is in Aha but I have to export it monthly to do this calculation because xls can do it and Aha can't. it would be nice to be able to do this in the same tool where the data resides.

How should it work?

like in xls, a weekend exclusion (business days only) and the ability to add a running list of holidays observed to allow for the data calc to no include those dates in the calc