In the history of Western liturgy, if a second Sunday falls within the Twelve Days of Christmas, then confusion reigned. The Roman Rite, including the Sarum and Tridentine uses, had ZERO provisions for anything for that Sunday. When the English Reformation hit, Anglicans did not pick up on this gaping hole either. Anglicans in the United States (Episcopalians) tried to fix that in 1928 with their new prayer book (at the time) and based the new propers on the flight to Egypt of the Holy Family. whereas in 1979 with the current prayer book the Episcopalians pulled in a choice of a couple of Epiphany-style readings (the Adoration of the Magi or the Finding of the Child Jesus Teaching in the Temple). Rome fixed the hole on their own at Vatican II with the prologue of St. John's Gospel (which the Episcopal Church in the US puts as the first Sunday after Christmas). As a result, we Anglicans in the US have THREE Gospel readings TOTALLY UNRELATED from which to choose. [1]
Good Lord deliver us. Don't even get me started on the Daily Office readings, or the readings for New Year's Day (Circumcision? Holy Name? Mary Mother of God?).
All of this confused welter for a Sunday that "appears" only four times in a seven year period however is unified on one point. That point is that in Jesus God the Word came and dwelt among us. He was a baby dependent on the care of human adults. He was physically at risk like any other human child. He actually grew and developed as a human would. The eternal God who was not human took on humanity and became one of us. How great a mystery this is, how wonderful a thing, what a great risk on the part of God, to become a part of His creation so we might better know Him. We will see Him revealed at Epiphany, hear His message through Ordinary Time and Lent, walk with Him in Jerusalem for Holy Week, then behold His redeeming love for us in His Passion, Crucifixion, Death, and Resurrection, behold Him depart with a promise to return at His Ascension, become united with Him when the Holy Spirit comes upon us at Pentecost, as we ponder for the rest of the year His message, and look for His return to us in Advent.
But for right now, let us just take joy in the fact that He has become one of us.
[1] A good summary of this confusion is given in a commentary recently written for The Living Church by Fr. Matthew S. C. Olver, Assistant Professor of Liturgics and Pastoral Theology at Nashotah House Seminary. The full article may be found here, but do get scratch paper and a pencil and a good eraser, it's quite involved.