In 2008, because March 25 falls during the Octave of Easter, the Annunciation is celebrated on March 31.
"Love and veneration are due to Mary for her own sake, because she is the Mother of mankind; because above all other mere creatures she has been sanctified by the Holy Spirit; and because in being chosen the Mother of the Incarnate Son, she is the Mother of us all."
Lives of the Saints For Every Day of the Year