The fourth Sunday of Lent is traditionally known by the name Laetare Sunday. This name is taken from the Introit at Mass, Laetare Jerusalem which means “Rejoice, O Jerusalem.” Laetare Sunday marks the halfway point through the Lenten season of fasting, abstinence, and penance, and because of this it is a day of joy in anticipation of the close arrival of Easter. This day corresponds with Gaudete Sunday halfway through the Advent season, where the priests wear rose-colored liturgical vestments and the altar is decorated with flowers, often roses.
//The Catholic Company//