As you may or may not know, I'm waaay Catholic (six kids, who woulda thunk it?). In the spirit of the season, I greet you with Gaudete! Rejoice! Yesterday is commonly referred to as Gaudete Sunday, coming from the Introit for this day which begins "Rejoice in the Lord always, again I say 'Rejoice!'" Typically, this day is also marked on the Advent Wreath with a pink or rose candle. Each Sunday, a new candle is lit. The first two and last are purple, but the one for the third Sunday, for Gaudete Sunday, is pink or rose. Of course, you don't have to use purple and pink colored candles. All four of the candles in the Pope's Advent Wreath are red!
Gaudete Sunday Wikipedia entry
Gaudete Sunday Catholic Encyclopedia entry
The Papal Advent Wreath at Catholic News Service
Music to Traditional Christmas Carol Gaudete (I can't get that melody out of my head)