There are many breakfast restaurants that are open on Christmas. Many diners and cafes will be open and serving breakfast, and some restaurants may even offer special holiday-themed breakfasts. Some popular options include IHOP, Denny's, and Waffle House. If you're looking for something more upscale, you might also try a local brunch restaurant. It's always a good idea to call ahead and confirm that the restaurant you're planning to visit will be open on Christmas day.