There are various restaurants open on Christmas day, including some chain restaurants, as well as local eateries that cater to holiday diners. Some popular chain restaurants that are open on Christmas day include Denny's, IHOP, and Waffle House. Additionally, many local restaurants also offer holiday specials, such as brunch buffets or Christmas-themed menus. However, it's always a good idea to call ahead and check with the restaurant to make sure they are open and to confirm their hours of operation.