Does Christmas have anything to do with Saturnalia? As it turns out, no. But the date of Christmas may have been determined by a minor Roman festival…
Further Reading
P. F. Bradshaw and M. E. Johnson, The Origins of Feasts, Fasts, and Seasons in Early Christianity (Collegeville, MN, 2011)
A. McGowan, “How December 25 Became Christmas,” Biblical Archaeology Review (December 2002)
Sol Invictus and Christmas (an encyclopedic review)