From a reader:
Per the United States Conference of Catholic Bishops (USCCB), January 1, the Solemnity of Mary, Mother of God, is a holy day of obligation — one of the few non-Sundays throughout the year when Catholics are required to attend Mass.
Since I follow the Traditional Calendar, along with my church, Old St. Mary’s here in Washington, we celebrated this feast, known as the Maternity of the Blessed Virgin Mary, on Saturday, October 11.
Did I satisfy my obligation for attending Mass on the feast of Mary, in her role as Mother of God?
Going to Mass on 11 October does not satisfy the obligation to go to Mass on 1 January.