This makes the tickets quite flexible for the user, but for Disney Parks, it makes things difficult when it comes to predicting what crowds will be like on any given day.
Even though a day at Disneyland will cost you upwards of $97 per person, the park regularly fills to capacity during the summer season and the Christmas holiday.
If you were to buy a three-day pass to Disneyland today, you’d have until January of 2020 to use it, but that ticket would be valid anytime you want between now and then, though you only have 13 days to use the remaining days on the ticket once the first day gets used.