In 2026, the necessity of booking Disney park reservations depends on the specific park and ticket type. For Walt Disney World in Florida, reservations are no longer required for most guests with standard "date-based" tickets (the most common type). However, if you are an Annual Passholder or are using a non-dated ticket, you still need to make a reservation. For these guests, popular weekends and holidays should be booked 2 to 3 months in advance. For Disneyland in California, the rules are stricter: all guests still require a park reservation. You can book up to 120 days (4 months) in advance, and it is highly recommended to do so as soon as you purchase your tickets, especially for high-demand periods like Spring Break, Christmas, or the opening of new attractions. If you are a "Magic Key" holder in California, you should book your preferred dates the moment your 90-day window opens, as reservations can disappear within minutes for popular parks. Even for date-based tickets in Florida, while you don't need a "reservation," you should still book your "Lightning Lane" entries and dining 60 days in advance to ensure a smooth trip.