Periods - Define different prices applicable to the rental, for different times of the year, and to define blackout dates when bookings won't be possible.
Seasonal pricing - A consecutive number of days during which the price may vary. A lodging in the mountains could, for example, be rented more expensive in high season. You can create as many periods as you like.
Booking blackout dates - Consecutive days during which it is not possible to book the rental (or appointment) on your website. A message will indicate that your property or service is closed. For example, a college could thus set a period of closure of the computer room during the school holidays.
Special day pricing - A day whose price varies the same every week. For example, a hotel might choose different prices on Friday nights or on Saturday nights (nights on weekends being generally more expensive).