The most popular holiday by far is Christmas, and what better way to celebrate than at the happiest place on earth? It is a fact that the Magic Kingdom reaches capacity on Christmas day within the morning hours each and every year. If you can avoid this day, you’ll thank me later. If you absolutely want to enjoy Magic Kingdom on Christmas day, but want to try to get some things accomplished in the parks, head over in the evening hours. Many of the morning guests are exhausted by then and leave to return to their resorts leaving a little more room in the parks for the evening attendees.