Yes, Denny's is open on Christmas Day from 6:00am to 2:00am. They offer a Christmas menu with traditional holiday items like turkey and stuffing, as well as their regular menu. You can also get your favorite Denny's dishes like Grand Slam breakfast or classic burgers. Denny's is also a great option for those who want to spend time with family or friends without having to cook or clean up. You can just enjoy a festive meal and take a break from the holiday hustle and bustle.