We have a calendar type that requires us to do pre-work before the appointment. So we need working days as an option.

Days (as the only option now) does not work because for the example of needing a 3 working days minimum scheduling notice, the following is not possible:

- Someone booking on Monday then they can book from Thursday (3 days)

- Someone booking on Tuesday then they can book from Friday (3 days)

- Someone booking on Wednesday then they can book from Monday (5 days)

- Someone booking on Thursday then they can book from Tuesday (5 days)

- Someone booking on Friday then they can book from Wednesday (5 days)

- Someone booking on Saturday then they can book from Thursday (4 days)

- Someone booking on Sunday then they can book from Thursday (4 days)