355. Q. How are we to worship God on Sundays and holydays of obligation?
A. We are to worship God on Sundays and holydays of obligation by
hearing Mass, by prayer, and by other good works.

356. Q. Are the Sabbath day and the Sunday the same?
A. The Sabbath day and the Sunday are not the same. The Sabbath is the
seventh day of the week, and is the day which was kept holy in the Old
Law; the Sunday is the first day of the week, and is the day which is
kept holy in the New Law.

357. Q. Why does the Church command us to keep the Sunday holy instead
of the Sabbath?
A. The Church commands us to keep the Sunday holy instead of the Sabbath
because on Sunday Christ rose from the dead, and on Sunday He sent the
Holy Ghost upon the Apostles.

358. Q. What is forbidden by the third Commandment?
A. The third Commandment forbids all unnecessary servile work and
whatever else may hinder the due observance of the Lord's day.

359. Q. What are servile works?
A. Servile works are those which require labor rather of body than of
mind.

360. Q. Are servile works on Sunday ever lawful?
A. Servile works are lawful on Sunday when the honor of God, the good of
our neighbor, or necessity requires them.