Where does Christmas come from?

Why do we celebrate Jesus' birthday on December 25? Is that really the day he was born? On this episode, Lydia and Andrew talk about the tradition of celebrating Christmas on December 25 and why it exists. Their conversation has a little bit of everything: Herod the Terribly Great, Dionysius Exiguus, Numerology, Sol Invictus, and the Battle of the Milvian Bridge. And by the end, they kind-of, sort-of, maybe just arrive at an answer.