In the organizer's words:

Part 1-4 on 6.12. & part 5-8 on 7.12. Start at 11 am. Your ticket is valid for both days of the event. Experience the entire Harry Potter saga on the big screen and immerse yourself in two days full of magic, adventure and unforgettable moments. Your ticket is valid for both days of the event - individual bookings are not possible. Water, coffee and tea are available free of charge during the marathon. Catering is also taken care of: in the next step, you can book suitable offers, including vegan options, of course.