“O” Antiphons of the Greater Ferias of Advent Help prepare your family for Christmas each day from December 17-24 by meditating on the Antiphons for Vespers. They may be found online with a meditation by the Servant of God, Dom Prosper Gueranger in his classic work The Liturgical Year. The antiphons were popularized in English by the hymn “O Come, O Come, Emmanuel”.