Whats interesting is some of their statements on the Sabbath, here is what the Protestant churches have on it:
Anglican:
"And where are we told in the Scriptures that we are to keep the first day at all? We are commanded to keep the seventh; but we are nowhere commanded to keep the first day... The reason why we keep the first day of the week holy instead of the seventh is for the same reason that we observe many other things, not because the Bible, but because the Church, has enjoined it." Isaac Williams, Plain Sermons on the Catechism, pages 334, 336.
Baptist:
'There was and is a command to keep holy the Sabbath day, but that Sabbath day was not Sunday. It will however be readily said, and with some show of triumph, that the Sabbath was transferred from the seventh to the first day of the week, with all its duties, privileges and sanctions. Earnestly desiring information on this subject, which I have studied for many years, I ask, where can the record of such a transaction be found: Not in the New Testament absolutely not. There is no scriptural evidence of the change of the Sabbath institution from the seventh to the first day of the week.' Dr. E. T. Hiscox, author of the Baptist Manual.
"To me it seems unaccountable that Jesus, during three years' discussion with His disciples, often conversing with them upon the Sabbath question, discussing it in some of its various aspects, freeing it from its false [Jewish traditional] glosses, never alluded to any transference of the day; also, that during the forty days of His resurrection life, no such thing was intimated. Nor, so far as we know, did the Spirit, which was given to bring to their remembrance all things whatsoever that He had said unto them, deal with this question. Nor yet did the inspired apostles, in preaching the gospel, founding churches, counseling and instructing those founded, discuss or approach the subject.
Of course I quite well know that Sunday did come into use in early Christian history as a religious day as we learn from the Christian Fathers and other sources. But what a pity that it comes branded with the mark of Paganism, and christened with the name of the sun-god, then adopted and sanctified by the Papal apostasy, and bequeathed as a sacred legacy to Protestantism." Dr. E. T. Hiscox, report of his sermon at the Baptist Minister's Convention, in 'New York Examiner,' November 16, 1893
"The Scriptures nowhere call the first day of the week the Sabbath. . .There is no Scriptural authority for so doing, nor of course, any Scriptural obligation." The Watchman.
"We believe that the law of God is the eternal and unchangeable rule of His moral government."-"Baptist Church Manual," Art. 12.
"There was never any formal or authoritative change from the Jewish seventh-day Sabbath to the Christian first-day observance." -WILLIAM OWEN CARVER, "The Lord's Day in Our Day," page 49.
"There is nothing in Scripture that requires us to keep Sunday rather than Saturday as a holy day." Harold Lindsell (editor), Christianity Today, Nov. 5, 1976
Church of Christ:
"But we do not find any direct command from God, or instruction from the risen Christ, or admonition from the early apostles, that the first day is to be substituted for the seventh day Sabbath." "Let us be clear on this point. Though to the Christian 'that day, the first day of the week' is the most memorable of all days ... there is no command or warrant in the New Testament for observing it as a holy day." "The Roman Church selected the first day of the week in honour of the resurrection of Christ. ..." Bible Standard, May, 1916, Auckland, New Zealand.
"... If the fourth command is binding upon us Gentiles by all means keep it. But let those who demand a strict observance of the Sabbath remember that the seventh day is the ONLY sabbath day commanded, and God never repealed that command. If you would keep the Sabbath, keep it; but Sunday is not the Sabbath. The argument of the 'Seventh-day Adventists' is on one point unassailable. It is the Seventh day not the first day that the command refers to." G. Alridge, Editor, The Bible Standard, April, 1916.
"There is no direct Scriptural authority for designating the first day the Lord's day."-DR. D. H. LUCAS, Christian Oracle, Jan. 23, 1890.
"The first day of the week is commonly called the Sabbath. This is a mistake. The Sabbath of the Bible was the day just preceding the first day of the week. The first day of the week is never called the Sabbath anywhere in the entire Scriptures. It is also an error to talk about the change of the Sabbath. There never was any change of the Sabbath from Saturday to Sunday. There is not in any place in the Bible any intimation of such a change."-"First-Day Observance," pages 17, 19.
"It has reversed the fourth commandment by doing away with the Sabbath of God's Word, and instituting Sunday as a holiday." DR. N. SUMMERBELL, "History of the Christian Church," Third Edition, page 4I5.
"To command...men...to observe...the Lord's day...is contrary to the gospel." - "Memoirs of Alexander Campbell," Vol. 1, page 528.
"It is clearly proved that the pastors of the churches have struck out one of God's ten words, which, not only in the Old Testament, but in all revelation, are the most emphatically regarded as the synopsis of all religion and morality."-ALEXANDER CAMPBELL, "Debate With Purcell," page 214.
"I do not believe that the Lord's day came in the room of the Jewish Sabbath, or that the Sabbath was changed from the seventh to the first day, for this plain reason, where there is no testimony, there can be no faith. Now there is no testimony in all the oracles of heaven that the Sabbath was changed, or that the Lord's day came in the room of it."-ALEXANDER CAMPBELL, Washington Reporter, Oct. 8, 1821.
Episcopalian:
"We have made the change from the seventh day to the first day, from Saturday to Sunday, on the authority of the one holy, Catholic, Apostolic Church of Christ." Bishop Symour, Why We keep Sunday.
"The Bible commandment says on the seventh-day thou shalt rest. That is Saturday. Nowhere in the Bible is it laid down that worship should be done on Sunday." Phillip Carrington, quoted in Toronto Daily Star, Oct 26, 1949 [Carrington (1892-), Anglican archbishop of Quebec
Lutheran:
"The observance of the Lord's Day (Sunday) is founded not on any command of God, but on the authority of the Church." Augsburg Confession of Faith.
"They [the Catholics] allege the Sabbath changed into Sunday, the Lord's day, contrary to the Decalogue, as it appears, neither is there any example more boasted of than the changing of the Sabbath day. Great, say they, is the power and authority of the church, since it dispensed with one of the Ten Commandments." -Augsburg Confession of Faith, Art. 28, par. 9.
"They [Roman Catholics] allege the change of the Sabbath into the Lord's day, as it seemeth, to the Decalogue [the ten commandments]; and they have no example more in their mouths than they change of the Sabbath. They will needs have the Church's power to be very great, because it hath dispensed with the precept of the Decalogue." The Augsburg Confession, 1530 A.D. (Lutheran), part 2, art 7, in Philip Schaff, the Creeds of Christiandom, 4th Edition, vol 3, p64 [this important statement was made by the Lutherans and written by Melanchthon, only thirteen years after Luther nailed his theses to the door and began the Reformation].
"For up to this day mankind has absolutely trifled with the original and most special revelation of the Holy God, the ten words written upon the tables of the Law from Sinai."-"Crown Theological Library," page I78.
"The Christians in the ancient church very soon distinguished the first day of the week, Sunday; however, not as a Sabbath, but as an assembly day of the church, to study the Word of God together, and to celebrate the ordinances one with another: without a shadow of doubt, this took place as early as the first part of the second century."-Bishop GRIMELUND, "History of the Sabbath," page 60.
"The festival of Sunday, like all other festivals, was always only a human ordinance."- AUGUSTUS NEANDER, "History of the Christian Religion and Church," Vol. 1, page 186.
"I wonder exceedingly how it came to be imputed to me that I should reject the law of Ten Commandments...Whosoever abrogates the law must of necessity abrogate sin also."-MARTIN LUTHER, Spiritual Antichrist," pages 71, 72.
"We have seen how gradually the impression of the Jewish Sabbath faded from the mind of the Christian church, and how completely the newer thought underlying the observance of the first day took possession of the church. We have seen that the Christian of the first three centuries never confused one with the other, but for a time celebrated both." The Sunday Problem, a study book by the Lutheran Church (1923) p.36
"But they err in teaching that Sunday has taken the place of the Old Testament Sabbath and therefore must be kept as the seventh day had to be kept by the children of Israel .... These churches err in their teaching, for scripture has in no way ordained the first day of the week in place of the Sabbath. There is simply no law in the New Testament to that effect" John Theodore Mueller, Sabbath or Sunday, pp.15, 16.....