The Solemnity of Mary, Mother of God
The Solemnity of Mary, Mother of God is this Monday, January 1. Since the Solemnity falls on a Monday, unlike other years, the precept to attend Mass is abrogated. (It is not a Holy Day of Obligation.) The Holy See approved the decree of the USCCB effective January 1, 1992.
However, there is a full schedule of Masses to start the new year worshipping God and giving Him thanks for the awesome gift of our Mother Mary.