*Denny's is a popular restaurant chain in the United States that is known for its affordable and tasty breakfast options. While most restaurants are closed on Christmas Day, Denny's is open 24 hours a day, 7 days a week, including Christmas Day. The restaurant serves a variety of breakfast, lunch, and dinner options, as well as a wide selection of desserts. Denny's also offers a variety of specials and discounts throughout the year, including on Christmas Day.*