Unfortunately, Burger King is not open on Christmas Day. It's one of the few days of the year when most restaurants and stores are closed, as people tend to spend time with their families and friends during this holiday. However, some fast-food chains and convenience stores may be open on a limited basis to serve customers who are in need of quick meals or snacks. So if you're really craving a burger on Christmas, you might have to get creative and find a way to make it yourself!