The modern Armenian church continues to celebrate Christmas on January 6; for most Christians, however, December 25 would prevail, while January 6 eventually came to be known as the Feast of the Epiphany, commemorating the arrival of the magi in Bethlehem.
The Gospels of Matthew and Luke provide well-known but quite different accounts of the event—although neither specifies a date. E., further details of Jesus’ birth and childhood are related in apocryphal writings such as the Infancy Gospel of Thomas and the Proto-Gospel of James.
These texts provide everything from the names of Jesus’ grandparents to the details of his education—but not the date of his birth. E., a Christian teacher in Egypt makes reference to the date Jesus was born.
E., when the apocryphal text known as the Epistle to the Apostles has Jesus instruct his disciples to “make commemoration of [his] death, that is, the Passover.” Jesus’ ministry, miracles, Passion and Resurrection were often of most interest to first- and early-second-century C. We can begin to see this shift already in the New Testament.
The earliest writings—Paul and Mark—make no mention of Jesus’ birth.
This would have occurred on the 14th of the Hebrew month of Nisan, just before the Jewish holiday began at sundown (considered the beginning of the 15th day because in the Hebrew calendar, days begin at sundown).