When I was a lad we observed January 6th as the last day of Christmas. Mother's people called it "Old Christmas." The church calls it Epiphany and celebrates it as the commemoration of the visit to the Christ-child by the Magi. The Eve of Epiphany, January 5th is Twelfth Night.
The Appalachian people to whom I referred had very strong beliefs and traditions surrounding Old Christmas. It was considered inappropriate to lend anything on this day, for the lender would never retrieve the item. Also, they believed that no matter how hard the ground might be frozen the elderbushes would sprout on the eve of Epiphany. If you were to sneak out to the barn or stable on the night of January 5th, at the very stroke of midnight, you would hear the animals praying.
Happy Birthday, son Mark.