Setting a random schedule which is different from day to day during the month

Hi,

I have Appointments + installed and need to schedule service providers at random times throughout the week. Their schedules are different every day and are not the same every week. How do I set their availability as I only see that they can do monday through Friday, I dont see a monthly option where they can select specific days during the month.

Can you help me do this please,

Thank You

Joe