Gaudete Sunday: This Child is our Victory. REJOICE! - Catholic Online:
"The Third Sunday of Advent is Gaudete Sunday, the 'pink candle' Sunday, the Sunday we light the pink candle on the Advent wreath. Gaudete is the imperative plural form of the Latin verb gaudere (to rejoice). It is a command ordering us to rejoice! In these days of penance and preparation leading up to the feast of our Savior's birth, it reminds us of the joy that is to come, and serves, amid this season of penance, as a kind of 'break' when we recall the hope we have because of the coming of Jesus."