I am wondering if this possible, i hope it is.

What i am trying to do is put a schedule together for labor for scheduling
a project. So far i have a start date and finish date. Now i would like to be
able to select what days they working. For example if the project says they
have to work saturday or sunday or both days, i would select thoughs options
and the days will automatically add thoughs days, but if i deselected thoughs
days, the dates will automatically skip saturday and sunday. This isnt just
for thoughs days, i want it also work for other days that i can select and
deselect.

Also is it possible to calculate the number of days based on if each day
selected and not selected to see if the schedule will go over the arranged
finish date

Thanks in advance