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The Feast of the Circumcision, which commemorates the circumcision of the infant Jesus on the eighth day after his birth, is known by a number of different names: Roman Catholics, who used to call it the Octave of the Birth of Our Lord or the Circumcision of Jesus, now mark the day as the Solemnity of Mary, the Mother of God. Episcopalians call it the Feast of the Holy Name of Our Lord Jesus Christ, as Jesus was officially given his name on this day. Lutherans refer to it as the Feast of the Circumcision and the Name of Jesus.
Source: The Free Dictionary