The Feast of the Annunciation, in greek, Ο Ευαγγελισμός της Θεοτόκου, contemporarily the Solemnity of the Annunciation, and also called Lady Day, the Feast of the Incarnation, or Conceptio Christi, 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. Wikipedia