The Fourth Sunday of Lent is called Laetare Sunday. Laetare means “rejoice.” The name comes from the entrance antiphon for the Mass: “Rejoice, Jerusalem, and all who love her. Be joyful, all who were in mourning; exult and be satisfied at her consoling breast” (cf. Is 66:1011).
3rd Sunday of Advent (C)
The third Sunday of Advent is known as Gaudete Sunday, after the first word of the Entrance Antiphon for the Mass: “Gaudete in Domino semper… Rejoice in the Lord always; again I say, rejoice. Indeed the Lord is near.” This verse is taken from St. Paul’s letter to the Philippians, which is also the second reading for this Sunday.