The Feast of the Conception of the Virgin Mary is a liturgical holiday celebrated on December 9 by the Orthodox Church and a number of Eastern Catholic Churches. It is also the name given in the Catholic Tridentine calendar for 8 December. In the present General Roman Calendar, the feast is called the Solemnity of the Immaculate Conception of the Blessed Virgin Mary. In the Eastern Orthodox Church, the holy day was once called the Feast of Conception of Saint Anne.