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 Immaculate Conception Feast of the Immaculate Conception The Solemnity of the Immaculate Conception celebrates the solemn celebration of belief in the Immaculate Conception of the Virgin Mary. It is universally celebrated on December 8, nine months before the feast of the Nativity of Mary, which is celebrated on September 8. The Immaculate Conception is one of the most important Marian feasts in the liturgical calendar of the Roman Catholic Church, and is celebrated worldwide. By Pontifical designation and decree, it is the patronal feast day of Argentina, Brazil, Korea, Nicaragua, Paraguay, Philippines, Spain, the United States, Uruguay and Italy. By royal decree,