The Gannons prepare for Christmas by decorating their tree with ornaments collected from around the world. “The 25th is an all-day affair for up to 30,” says Charissa. After a celebratory lunch, guests traditionally play Dirty Santa, a spin on Kris Kringle. “We put wrapped gifts in a circle. Everyone draws a number and then, in numerical order, has the option of choosing a gift from the circle or taking someone else’s opened gift!”