The Solemnity of the Epiphany, which we honor on the Sunday after January 1, is older than the celebration of Christmas, going back to the very beginnings of the Church.
Early Christians found deep meaning and inspiration in the astounding truth that God has fully revealed Himself in an absolute and definitive way in Jesus Christ.
The Book of Hebrews tells us that God spoke in fragmentary and varied ways in the past, but now, in Christ, all has been spoken and revealed to us!