Protestants, since their emergence in the sixteenth century, have rejected the day named by God for His worship, assuming a different day in apparent contradiction to His command, despite having the Bible as their sole infallible teacher. The Protestant world has been in thorough accord with the Catholic Church in keeping holy not Saturday, but Sunday, for over three centuries. What Protestant pulpit does not ring almost every Sunday with loud and impassioned invectives against Sabbath violation? The fanatical clamor of Protestant ministers against opening the gates of the World's Fair on Sunday, along with thousands of petitions signed by millions to save the Lord's Day from desecration, demonstrates their widespread excitement and noisy remonstrance. At the World's Fair, various sects of Protestantism exhibited virtuous and conscientious indignation when the Supreme Court decided not to interfere with the Sunday opening, with some refusing to utilize their assigned space or open their boxes in rigid adherence to their principles. If arguments furnished by Israelites and Seventh-day Adventists, who appeal to the Bible for strict observance of Saturday, prove incontrovertible, the great body of Protestants would have no recourse but to admit they have been teaching and practicing what is Scripturally false for over three centuries by adopting the practice of a church they have long considered apostate. No Protestant living has ever obeyed the command to remember the Sabbath day and keep it holy, preferring to follow this apostate church rather than the Bible, their teacher. The discussion of whether Saturday or Sunday is the day enjoined by God hinges on plain questions: which day does the Bible enjoin to be kept holy, has the New Testament modified the original command, and have Protestants obeyed the command of God by keeping holy the day enjoined by their infallible guide and teacher, the Bible?

Protestantism, adhering to the principle of Sola Scriptura, recognizes no rule of faith or teacher save the infallible Bible. It holds that all spirituality, religion, faith, and practice are derived solely from its teachings, viewing the Bible as the voice of God and the sole inspired teacher. This stance asserts that the Bible alone is the foundation of Protestant Christianity. However, there exists a direct contradiction between the teaching and practice of Protestant Christianity, with the exception of Seventh-day Adventists, and that of the Jewish people, as both observe different days for the worship of God. The Roman Catholic Church challenges that if Protestantism bases its teachings only on the Bible, it should worship on Saturday, the biblical Sabbath, rather than Sunday. The Catholic Mirror has historically emphasized that unless one accepts the authority of the Catholic Church to designate the day of worship, the Christian should observe Saturday. Thus, Protestant practice of Sunday worship lacks biblical support, as no divine decree in the New Testament repeals the Saturday Sabbath or substitutes Sunday as the day to be kept holy.

Protestant theologians and preachers from various denominations candidly admit that there is no Biblical authority for observing Sunday as a sabbath. Isaac Williams of the Anglican/Episcopal tradition notes that Scripture commands the keeping of the seventh day, not the first, and the observance of Sunday is due to church injunction rather than Biblical mandate. Canon Eyton from the same tradition states there is no divine law in the New Testament regarding rest on Sunday, placing its observance on the same footing as other church traditions like Ash Wednesday or Lent. Bishop Seymour acknowledges the change from the seventh to the first day was made on the authority of the Catholic Church. Dr. Edward T. Hiscox, a Baptist, asserts that the Sabbath day commanded in Scripture is not Sunday, and no record of such a transfer exists in the New Testament, lamenting the day's association with pagan influences adopted by papal authority and passed to Protestantism. William Owen Carver, also a Baptist, confirms there was never a formal or authoritative change from the seventh-day Sabbath to the first-day observance. Dr. R. W. Dale, a Congregationalist, clarifies that observing Sunday is not keeping the Sabbath, as the Sabbath was founded on a specific Divine command, with no such command existing for Sunday in the New Testament. Timothy Dwight, another Congregationalist, states that the Christian Sunday is not found in Scriptures and was not called the Sabbath by the early Church. Alexander Campbell of the Disciples of Christ questions the change from the seventh to the first day, asserting that no man can pinpoint where, when, or by whom such a change occurred, dismissing it as unsupported by Scripture. A publication from the Disciples of Christ further notes that the first day of the week is never called the Sabbath in the Bible, and there is no intimation of such a change. The United Lutheran Church's study book, *The Sunday Problem*, observes that early Christians gradually shifted from the Jewish Sabbath to the first day, never confusing the two, and for a time celebrated both. The Augsburg Confession of Faith, approved by Martin Luther, critiques the notion of changing the Sabbath Day into the Lord's Day as contrary to the Decalogue, highlighting the power claimed by the Church to dispense with commandments. Dr. Augustus Neander, a Lutheran historian, states that the festival of Sunday was a human ordinance, not a Divine command, and was not intended by the apostles to transfer Sabbath laws to Sunday. John Theodore Mueller, also Lutheran, argues that Scripture does not ordain the first day in place of the Sabbath, and churches err in teaching otherwise. Harris Franklin Rall of the Methodist tradition notes indications in the New Testament of the church keeping the first day for worship, but no passage commands Christians to observe it or transfer the Jewish Sabbath to that day. John Wesley, a prominent Methodist, emphasizes that Christ did not revoke the moral law of the Ten Commandments, which remains in force for all mankind in all ages. Dwight L. Moody, an influential evangelist, maintains that the Sabbath was binding from Eden and remains in force, as evidenced by the commandment to remember it, questioning how one commandment could be dismissed while the other nine are upheld. T. C. Blake, a Presbyterian, asserts that the Sabbath, as part of the Decalogue, stands until the whole moral law is repealed, and the teaching of Christ confirms its perpetuity.