James Cardinal Gibbons, The Faith of our Fathers, 88th ed., pp. 89.
"But you may read the Bible from Genesis to Revelation, and you will not find a single line authorizing the sanctification of Sunday. The Scriptures enforce the religious observance of Saturday, a day which we never sanctify."
James Cardinal Gibbons, Archbishop of Baltimore (1877-1921), in a signed letter.
"Is Saturday the seventh day according to the Bible and the Ten Commandments? I answer yes. Is Sunday the first day of the week and did the Church change the seventh day —Saturday — for Sunday, the first day? I answer yes. Did Christ change the day'? I answer no!
"Faithfully yours, J. Card. Gibbons"
Peter Geiermann, C.S.S.R., The Converts Catechism of Catholic Doctrine (1957), p. 50.
"Question: Which is the Sabbath day?
"Answer: Saturday is the Sabbath day.
"Question: Why do we observe Sunday instead of Saturday?
"Answer: We observe Sunday instead of Saturday because the Catholic Church transferred the solemnity from Saturday to Sunday."
Roman Catholic and Protestant Confessions about Sunday and the Bible Sabbath