We celebrate another feast—the Annunciation of the Lord—on March 25, exactly nine months before Christmas. It was at the Annunciation, when the Blessed Virgin Mary humbly accepted the honor bestowed on her by God and announced by the angel Gabriel, that the conception of Christ took place.
Date: December 8.
Type of Feast: Solemnity; Holy Day of Obligation.
Readings: Genesis 3:9-15, 20; Psalm 98:1, 2-3ab, 3cd-4; Ephesians 1:3-6, 11-12; Luke 1:26-38
Other Names for the Feast: Solemnity of the Immaculate Conception of the Blessed Virgin Mary; Feast of the Conception of Saint Anne
History of the Feast of the Immaculate Conception:
The Feast of the Immaculate Conception, in its oldest form, goes back to the seventh century, when churches in the East began celebrating the Feast of the Conception of Saint Anne, the mother of Mary. In other words, this feast celebrates the conception of the Blessed Virgin Mary in the womb of Saint Anne; and nine months later, on September 8, we celebrate the Nativity of the Blessed Virgin Mary.