THE PRECEPTS OF THE CATHOLIC CHURCH
Precept #1 :
“You shall attend Mass on Sundays and on holy days of obligation and rest from servile labor” – Catechism of the Catholic Church, 2042

Fr. Bill addresses the obligation to celebrate Sunday Mass and answers the questions:
Why do Catholics go to Mass on Sundays?
How did the command “Keep Holy the Sabbath” shift from an observance on Saturday for the Jewish People to Sunday for Christians?