Feast of the Circumcision of Christ of Jesus. Pope John XXIII's 1960 rubrical and calendrical revision called 1 January simply the Octave of the Nativity. (This 1960 calendar was incorporated into the 1962 Roman Missal, whose continued use is authorized by the motu proprio "Summorum Pontificum".) The 1969 revision states: "1 January, the Octave Day of the Nativity of the Lord, is the Solemnity of Mary, the Holy Mother of God, and also the commemoration of the conferral of the Most Holy Name of Jesus." The Anglican communion's "Book of Common Prayer" liturgy celebrates this day as the Circumcision of Christ. Since 2000, the "Common Worship"
Feast of the Annunciation with the Incarnation of Christ at the Annunciation, on which date Jesus Christ is believed to have been conceived in the Virgin Mary by the Holy Spirit. The Knights of Columbus observe the Feast of the Annunciation as the "International Day of the Unborn Child". Feast of the Annunciation The Feast of the Annunciation, contemporarily the Solemnity of the Annunciation, also known as Lady Day, the Feast of the Incarnation ('), 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