The Feast of the Annunciation (Greek: Ο Ευαγγελισμός της Θεοτόκου, romanized: O Evangelismós tis Theotókou, lit. 'the Annunciation of the Mother of God') commemorates the visit of the archangel Gabriel to the Virgin Mary, during which he informed her that she would be the mother of Jesus Christ, the Son of God. It is celebrated on 25 March; however, if 25 March falls either in Holy Week or in Easter Week, the feast is postponed to the Monday after the Second Sunday of Easter.
Other names for the feast include the Solemnity of the Annunciation, Lady Day, Feast of the Incarnation (Festum incarnationis), and Conceptio Christi (Christ's Conception).