Description: Why does the Catholic Church obligate its members to attend Mass on Sundays? For Christians, Sunday, the first day of the week or the eighth day, replaces the seventh day, the Sabbath, as the day to reserve for worshiping God. The Sabbath represents the completion of the first creation. When Jesus Christ arose from the dead on Sunday, He inaugurated the new creation. Thus, Sunday became the Lord’s Day and is now the foremost holyday of obligation in the universal Church, as we are told in paragraph 2127 of the Catholic Catechism. We are bound to attend Mass, under pain of grave sin, unless there is a serious reason for not doing so. Sundays are also called to be a day of rest. Christians are bound to abstain from work which impedes worshiping God and the joy of the Lord’s Day. This is Peggy Stanton and this has been the Order of Malta’s Minute with the Catechism.