On Christmas Day, Disneyland Park and Disney World are typically very busy, as many families and children visit the theme parks to enjoy the holiday atmosphere. The parks are decorated with festive lights and ornaments, and there are often special events and shows planned to celebrate the season. However, it can be a very crowded and hectic time at the parks, as there are many people trying to enjoy the holiday spirit. It's always best to check the park hours and plan your visit accordingly to avoid the busiest times.