On Christmas Day, the reindeer take a break from their flight duties and enjoy some leisure time at the North Pole. They typically spend the day playing in the snow and enjoying the festive atmosphere. Some of the reindeer have been known to play games like hide-and-seek or tag, while others prefer to relax and take in the beauty of the winter landscape. Santa also tends to spend some time with the reindeer on Christmas Day, sharing his appreciation for their hard work throughout the year.