On the liturgical calendar, the baptism of Jesus is traditionally commemorated on the second Sunday of Epiphany.
Reading from Matthew chapter 3:13-15
13 Then Jesus went from Galilee to the Jordan River to be baptized by John. 14 But John tried to talk him out of it. “I am the one who needs to be baptized by you,” he said, “so why are you coming to me?”15 But Jesus said, “It should be done, for we must carry out all that God requires.” So John agreed to baptize him.
Reading from Luke 2:25 after baby Jesus was presented in the Temple.
25-32 Now there was a man in Jerusalem called Simeon, who was pious, righteous and devout. He was waiting for the consolation of Israel, and the Holy Spirit was on him. The Holy Spirit had shown him that he would see the Messiah of God before he died. Led by the Spirit, he entered the Temple. As the parents of the child Jesus brought him in to carry out the rituals of the Law, Simeon took him into his arms and blessed God: (MSG)
The word of the Lord came to John son of Zechariah in the wilderness. 3 He went into all the country around the Jordan, preaching a baptism of repentance for the forgiveness of sins. 4 As it is written in the book of Isaiah the prophet: