Christmas Day is one of the most popular holidays of the year, and movie theaters take advantage of this by showing many movies that are centered around Christmas and the holiday season. Some of the movies that may be playing on Christmas Day include "The Grinch," "The Polar Express," "Elf," "Home Alone," and many others. These movies often have themes of family, togetherness, and holiday spirit, making them a perfect choice for a holiday movie marathon.