Disney World is usually quite busy on Christmas Day. The park is decorated with festive decorations and there are special events and shows going on throughout the day. Many families make it a tradition to visit Disney World on Christmas and so the park can be quite crowded. It's also a time when many people are off from work and school, which can also increase the crowds. However, if you plan ahead and arrive early, you can still enjoy all the magic of Disney World even on a busy day like Christmas.