Life in Christ
Sunday fulfills the spiritual truth of the Jewish sabbath and an
nounces man’s eternal rest in God. For worship under the Law pre
pared for themystery of Christ, andwhat was done there prefigured
some aspects of Christ:
Those who lived according to the old order of things have
come to a new hope, no longer keeping the sabbath, but the
Lord’s Day, in which our life is blessed by him and by his
The celebration of Sunday observes the moral command
ment inscribed by nature in the human heart to render to God an
outward, visible, public, and regular worship “as a sign of his
universal beneficence to all.”
Sunday worship fulfills the moral
command of the Old Covenant, taking up its rhythm and spirit in
the weekly celebration of the Creator and Redeemer of his people.
The Sunday Eucharist
The Sunday celebration of the Lord’s Day and his Eucha
rist is at the heart of the Church’s life. “Sunday is the day on which
the paschal mystery is celebrated in light of the apostolic tradition
and is to be observed as the foremost holy day of obligation in the
“Also to be observed are the day of the Nativity of Our Lord Jesus
Christ, the Epiphany, the Ascension of Christ, the feast of the Body and
Blood of Christi, the feast of Mary the Mother of God, her Immaculate Con
ception, her Assumption, the feast of Saint Joseph, the feast of the Apostles
Saints Peter and Paul, and the feast of All Saints.”
This practice of the Christian assembly dates from the
beginnings of the apostolic age.
Letter to the Hebrews
minds the faithful “not to neglect to meet together, as is the habit
of some, but to encourage one another.”
108 St. Ignatius of Antioch,
9, 1: SCh 10, 88.
109 St. Thomas Aquinas,
II-II, 122, 4.
110 CIC, can. 1246 § 1.
111 CIC, can. 1246 § 2: “The conference of bishops can abolish certain holy
days of obligation or transfer them to a Sunday with prior approval of
the Apostolic See.”