"Ques. - Which is the Sabbath day?
"Ans. - Saturday is the Sabbath day.
"Ques. - Why do we observe Sunday instead of Saturday?
"Ans. - We observe Sunday instead of Saturday because the Catholic Church, in the Council of Laodicea (A.D. 336), transferred the solemnity from
Saturday to Sunday."
Source: The Convert's Catechism of Catholic Doctrine, written by Reverend Peter Geiermann, C.S.R., and blessed by Pope Pius X on the 25th of January
1910, Second edition, page 50.
LAODICEA, CANON 29. - Christians must not judaize by resting on the Sabbath, but must work on that day, rather honoring the Lord's Day; and, if they
can, resting then as Christians. But if any shall be found to be judaizers, let them be anathema from Christ.
CATECHISM OF POPE PIUS X
The Third Commandment
1 Q. What does the Third Commandment: Remember thou keep holy the Sabbath day, command us to do?
A. The Third Commandment: Remember thou keep holy the Sabbath day, commands us to honour God by acts of worship on festivals.
2 Q. What are festivals?
A. In the Old Law they were Saturdays and certain other days regarded as specially solemn by the Jews; in the New Law they are Sundays and other
festivals instituted by the Church.
3 Q. Why is Sunday sanctified instead of Saturday in the New Law?
A. Sunday, which means the Lord's Day, was substituted for Saturday, because it was on that day that our Lord rose from the dead.
Note: Sun day does NOT mean Lord's Day. Sun Day is the holiday of the Roman sun-god "Sol Inviticus.
Q. Have you any other way of proving that the church has power to institute festivals of precept?
A. Had she not such power, she could not have done that in which all modern religionists agree with her - she could not have substituted the
observance of Sunday the first day of the week, for the observance of Saturday the seventh day, a change for which there is no Scriptural
Source: A Doctrinal Catechism, by Rev. Stephen Keenan, Imprimatur by John Cardinal McCloskey, Archbishop of New York, Copyright 1876 by T. W. Strong,
For more interesting reading on this subject go to godkind.org...