Date Range Formula with Calendar's drop-down option needed


Is it possible to create formula for Appointment date with calendar’s drop-down box where:
Appointment will have an option to be scheduled in range between 30 and 60 calendar days ONLY from the Customer Request Date?
Example: CRD is today, November 28,2017. Appointment can be scheduled ONLY between December 29, 2017 and January 28,2017