An alternate reading follows.
Gospel (Matthew 1.16, 18-21, 24a)
Jacob was the father of Joseph, the husband of Mary, of whom Jesus was born, who is called the Christ.
Now the birth of Jesus the Christ took place in this way. When his mother Mary had been engaged to Joseph, but before they lived together, she was found to be with child from the Holy Spirit.
Her husband Joseph, being a righteous man and unwilling to expose her to public disgrace, planned to dismiss her quietly.
But just when he had resolved to do this, an Angel of the Lord appeared to him in a dream and said, “Joseph, son of David, do not be afraid to take Mary as your wife, for the child conceived in her is from the Holy Spirit. She will bear a son, and you are to name him Jesus, for he will save his people from their sins.”
When Joseph awoke from sleep, he did as the Angel of the Lord commanded him; he took her as his wife.
Gospel (Luke 2.41-51a)
Every year the parents of Jesus went to Jerusalem for the festival of the Passover. And when he was twelve years old, they went up as usual for the festival.
When the festival was ended and they started to return, the boy Jesus stayed behind in Jerusalem, but his parents did not know it. Assuming that he was in the group of travellers, they went a day’s journey. Then they started to look for him among their relatives and friends. When they did not find him, they returned to Jerusalem to search for him.
After three days they found him in the temple, sitting among the teachers, listening to them and asking them questions. And all who heard him were amazed at his understanding and his answers.
When his parents saw him they were astonished; and his mother said to him, “Child, why have you treated us like this? Look, your father and I have been searching for you in great anxiety.” He said to them, “Why were you searching for me? Did you not know that I must be in my Father’s house?” But they did not understand what he said to them. Then he went down with them and came to Nazareth, and was obedient to them.