The Saturnalia, when even slaves had enjoyed great liberty, became Christmas; the resurrection of Attis, Easter. There was a lot of legerdemain in this. No one then knew the year Christ was born—it was probably 5 B.C.—let alone the date. Sometime in A.D. 336 Roman Christians first observed his birthday. The Eastern Roman Empire picked January 6 as the day, but later in the same century December 25 was adopted, apparently at random.
