This is for the period ending date on a payroll time entry form. I need to restrict the user to only specific biweekly end dates.  I thought I'd found a way to do this by adding exceptions, but now I can't make that work. I can only enter exceptions if the day of the week is disabled; however, if I disable all days of the week, the field automatically resets to allow all days of the week and wipes out all the exceptions I just entered. 

• Was I on the right track, but missing something about how to do it?
• Is there another way to accomplish this? (I've asked a related question before but got no response, as though this isn't something that anyone else has ever needed to do.)