The Annunciation (anglicised from the Latin Vulgate Luke 1:26-39 Annuntiatio nativitatis Christi), also referred to as the Annunciation to the Blessed Virgin Mary or Annunciation of the Lord, is the Christian celebration of the announcement by the angelGabriel to the Virgin Mary that she would conceive and become the mother of Jesus, the Son of God, marking his Incarnation. Gabriel told Mary to name her son Jesus, meaning "Saviour". Many Christians observe this event with the Feast of the Annunciation on 25 March, nine full months before Christmas, the birthday of Jesus. According to Luke 1:26, the Annunciation occurred "in the sixth month" of Elizabeth's pregnancy with John the Baptist. Irenaeus (c.130-202) of Lyon regarded the conception of Jesus as 25 March coinciding with the Passion.
Approximating the northern vernal equinox, the date of the Annunciation also marked the New Year in many places, including England, where it is called Lady Day. Both the Roman Catholic and Eastern Orthodox Churches hold that the Annunciation took place at Nazareth, but differ as to the precise location. The Basilica of the Annunciation marks the site preferred by the former, while the Greek Orthodox Church of the Annunciation marks that preferred by the latter.