Yes, unfortunately, most Dunkin' Donuts locations are closed on Christmas Day. It's a time for family and friends, so many businesses close down to allow their employees to enjoy the holiday. But if you need a sweet treat, there are still plenty of other options available, like homemade cookies or cakes from local bakeries. Or you could always make your own treats! Either way, there's no shortage of delicious desserts to satisfy your sweet tooth on Christmas Day.