The Gospels for the Sundays in December are taken from St. Matthew and are from Year A, Cycle 2 of the readings.

 

December 1st - 1st Sunday in Advent Watch, therefore; you do not know when the Lord of the house is coming.
December 8th -2nd Sunday in Advent The Gospel is about John the Baptist preaching in the wilderness.
December 15th - 3rd Sunday in Advent The crowds question St. John the Baptist asking him who he is.
December 22nd - 4th Sunday in Advent The Gospel is about the revelation to St. Joseph of Mary's virginal conception.
December 29th - Holy Family This Gospel recounts the Holy Family's flight into Egypt.