when was old christmas day

Old Christmas Day, also known as Epiphany or the Feast of the Three Kings, is a Christian holiday celebrated on January 6th. It commemorates the visit of the Magi, also known as the Three Wise Men or Three Kings, to the infant Jesus. The holiday has been observed since at least the 4th century, when the Church officially set January 6th as the date of the feast. In some countries, it is celebrated as a major festival, while in others it is a more subdued observance.