The Solemnity of Mary, Mother of God Day Celebrated: January 1, Holy Day of Obligation. What Is the Feast About? One of the most important dogmatic Marian teachings of our faith is that Mary is the Mother of God. This title of “Theotokos” or “God-Bearer” testifies to the fundamental reality of the Incarnation: the Person of the Son assumed to Himself a human nature; He is fully God and fully Man. The Catechism of the Catholic Church explains that: Called in... Read more