Christmas Eve is celebrated in Cuba, not Christmas Day.
It's called Noche Buena, and it includes food, music, dancing and gatherings.
A traditional Cuban Noche Buena feast consists of plenty of roast pig (yes, a whole one), black beans and rice, fried plantains and yucca with garlic. To wash it all down: mojitos, cuba libres, or a sidra (sparkling hard cider). Desserts include rice pudding and rum cake. I can feel the food coma starting already.