Backstory: Why is Christmas on December 25?

If Christmas commemorates the birth of Jesus, and we celebrate it on December 25, then Jesus must have been born on that day, right? Not so fast! We actually have no good idea when Jesus was born. And besides, the observance of his birth on December 25 is a 4th century contrivance. But why December 25 of all days? In today's episode, professor and author Michael Foley joins Brian to make sense of…