The date field in Magical Order Form Fields includes a "Set available days" option that lets you enable or disable specific days of the week. For example, you could disable Mondays so that customers can only select Tuesday through Sunday. This setting applies to every week — there's no way to allow or block specific calendar dates (like only allowing March 19-21, or only dates after a certain date).
The time field uses a standard time input and does not have any restriction settings. Customers can select any time.
If you need to communicate availability constraints beyond the day-of-week setting, use the field's help text to let customers know (e.g., "Delivery available Tuesday to Sunday").