text: Religious significance The commemorated event is known in the 1549 prayer book of Edward VI and the 1662 Book of Common Prayer as "The Annunciation of the (Blessed) Virgin Mary" but more accurately (as in the modern Calendar of the Church of England) termed "The Annunciation of our Lord to the Blessed Virgin Mary". It is the first of the four traditional English quarter days. The "(Our) Lady" is the Virgin Mary. The term derives from Middle English, when some nouns lost their genitive inflections. "Lady" would later gain an -s genitive ending, and therefore the name means "(Our) Lady's day". The day commemorates the tradition of archangel Gabriel's announcement to Mary that she would give birth to the Christ.
  It is celebrated on 25 March each year. In the Catholic Church's Latin liturgical rites, when 25 March falls during Holy Week or Easter week, it is transferred forward to the first suitable day during Eastertide. In Eastern Orthodoxy and Eastern Catholicism, it is never transferred, even if it falls on Pascha (Easter). The concurrence of these two feasts is called kyriopascha.
  The Feast of the Annunciation is observed almost universally throughout Christianity, especially within Orthodoxy, Anglicanism, Catholicism, and Lutheranism. It is a major Marian feast, classified as a solemnity in the Catholic Church, a Festival in the Lutheran Churches, and a Principal Feast in the Anglican Communion. In Orthodox Christianity, because it announces the incarnation of Christ, it is counted as one of the 8 great feasts of the Lord, and not among the four great Marian feasts, although some prominent aspects of its liturgical observance are Marian. Two examples in liturgical Christianity of the importance attached to the Annunciation are the Angelus prayer and, especially in Roman Catholicism, the event's position as the first Joyful Mystery of the Dominican Rosary.