In 2026, Disney park reservations (formerly known as "Park Passes") still have the potential to sell out, though the system has become more flexible for certain ticket types. While "date-based" tickets at Walt Disney World no longer require a separate reservation, Annual Passholders (Magic Key in Disneyland or Incremental tiers in Disney World) and certain non-dated tickets still must secure a spot. During peak periods like Christmas week, Spring Break, or the opening of a major new attraction, these "buckets" of reservations can and do reach capacity well in advance. At Disneyland Resort, the reservation requirement remains more strictly applied to almost all ticket types to manage the smaller footprint of the parks. To ensure entry, it is essential to check the official "Availability Calendar" on the Disney website before purchasing your tickets. If a date shows as "unavailable," it means the park has reached its allocated capacity for that specific group, and you will not be allowed entry without a pre-secured reservation.