This is a question that is often asked, and it is answered in various ways, according to the various ideas that men have as to the way that the first day of the week came to be so generally substituted for the seventh.
But the true answer to the question is that nobody ever changed the Sabbath, because such a thing is impossible. The Sabbath is enjoined by the fourth commandment, which is a part of the law that is the righteousness of God; and of the commandments we read that: "They stand fast for ever and ever, and are done in truth and uprightness." (Psalm 112:8)
The Saviour said, "It is easier for heaven and earth to pass, than one tittle of the law to fail." (Luke 16:17)
So the Sabbath has never been changed.
But the Bible tells of a power,--the papacy,--symbolized by the little horn of the seventh of Daniel, which should "think to change times and laws," (Daniel 7:25)--or, as most versions, including the Revised, have it, "He shall...think to change the times and the law." (Daniel 7:25,RV)
This power thinks itself able to do it, because it exalts itself above all that is called God, or that is worshiped, and sets itself forth to be God. But what it thinks to do it is as unable to do as it is to make itself God. It is true that it has made a great many people believe that the Sabbath has been changed, but that does not make it so.
Those who recognize the Lord as the sole Ruler and Creator of the universe, without any vicegerent, know that the Sabbath of the fourth commandment is as unchangeable as the throne of the eternal God.--Present Truth, March 12, 1903 572--Originally appeared in Present Truth, February 3, 1893.