“The Virgin Mary… being obedient to His word, received from an angel the glad tidings that she would bear God.” (Saint Irenaeus, Bishop of Lyons; Against Heresies, 5:19:1; A.D. 180)
The Solemnity of Mary, Mother of God is January 1. The Memorial of St. Irenaeus, Bishop and Martyr (A.D. 130 – 202), is June 28.