the reminders should allow for cancellation policy consideration; ours is 48 business hours and we re not open weekends; patients think they cn cancel a Monday appointment on a Saturday, or Tuesday on a Sunday; they cannot without a fee being applied, but your system sends out notifications too late for us. If I set it for 4 days, they will cancel too last minute for us as well. The reminder serves as a warning that if they cancel they will be charged