At what time the first day began to be observed weekly, we have no particular account; but from the favor it received from the bishops of Rome, and some of the Christian fathers, at the close of the third and beginning of the fourth century, we suppose it had then become a practice in Rome and some of the western churches.
This brings us to near the close of the third century. And here it ought to be noted, that Lord's day, or Sunday, was not the only holy-day of the Church during these three centuries. Origen (as quoted by Dr. Peter Heylyn in his History of the Sabbath) names the Good Friday as we call it now, the Parasceve as he calls it there; the feasts of Easter and of Pentecost. And anciently, not only the day which is now called Whitsunday or Pentecost, but all the fifty days from Easter forward, were accounted holy, and solemnized with no less observance than the Sundays were. Of the day of the Ascension, or Holy Thursday, it may likewise be said, that soon after, it came to be more highly esteemed of than all the rest. Such was the estimation in which the Lord's day was held. It was on a level with those other holy days which are now disregarded by the body of the Protestant Church. It is to be remembered, farther, that the term Sabbath was applied exclusively to the seventh day of the week, or Saturday. Indeed, wherever, for a thousand years and upwards, we meet the word Sabbatum in any writer, of what name soever, it must be understood of no day but Saturday.
The Sabbath from the time of Constantine to the Reformation.
We have seen how the matter stood until the commencement of Constantine's career. The Sabbath was generally observed, while the Lord's day was regarded as a festival of no greater importance or authority than Good Friday or Holy Thursday. No text of Scripture, or edict of emperor, or decree of council, could be produced in its favor. But from this time forth may be found emperors and councils combining to give importance to the Lord's day and to oppose the Sabbath.
An important change in the regard paid to the first day was produced soon after the accession of Constantine, the first Christian emperor, in the early part of the fourth century. When he became master of Rome, he soon gave himself up to the guidance of the Christian clergy. According to Jones' Church History, "He built places of public worship; he encouraged the meeting of synods and bishops; honored them with his presence, and employed himself continually in aggrandizing the church. He was scrupulously attentive to the religious rites and ceremonies which were prescribed to him by the clergy. He fasted, observed the feasts in commemoration of the martyrs, and devoutly watched the whole night on the vigils of the saints," and showed great anxiety for uniformity in the doctrines and observances of religion in the church. He was, therefore, exactly suited to the wishes of the Roman bishop and clergy, in establishing, by his imperial authority, what they had no Scripture to support, and what their influence had hitherto been insufficient to effect, viz. a uniformity in the celebration of Easter and the first day. In 321, Constantine first published his edicts enjoining upon his subjects these superstitious celebrations.
Eusebius, in his Life of Constantine, says: "He appointed as a suitable time for prayers the Dominical day, which then was an especial day, and now is undoubtedly the very first. His body guard observed the day, and offered on it prayers written by the Emperor. The happy prince endeavored to persuade all to do this, and by degrees to lead all to the worship of God; wherefore he determined that those obeying Roman power should abstain from every work upon the days named after the Saviour, that they should venerate also the day before the Sabbath, in memory, as seems to me, of the events occurring on those days to our common Saviour." He says again, "An edict also, by the will and pleasure of the Emperor, was transmitted to the Prefects of the provinces, that they thenceforth should venerate the Dominical day; that they should honor the days consecrated to the martyrs, and should celebrate the solemnities of the festivals in the churches, all which was done according to the will of the Emperor." And, as quoted by Lucius, he says, that he admonished his subjects likewise that those days which were Sabbaths should be honored or worshiped.
Sozomen, in his Ecclesiastical History, b. 1, c. 8, says, "He (Constantine) also made a law that on the Dominical day, which the Hebrews call the first day of the week, the Greeks the day of the Sun, and also on the day of Venus, (i. e. Friday,) judgments should not be given, or other business transacted, but that all should worship God with prayer and supplications, and venerate the Dominical day, as on it Christ rose from the dead, and the day of Venus, as the day on which he was fixed to the cross."
Dr. Chambers says, "It was Constantine the Great who first made a law for the observance of Sunday, and who, according to Eusebius, appointed that it should be regularly celebrated throughout the Roman empire. Before him, and even in his time, they observed the Jewish Sabbath as well as Sunday, both to satisfy the law of Moses, and to imitate the Apostles, who used to meet together on the first day." He adds, "Indeed, some are of opinion that the Lord's day mentioned in the Apocalypse is our Sunday, which they will have to have been so early instituted." By Constantine's laws, made in 321, it was decreed that for the future the Sunday should be kept a day of rest in all cities and towns; but he allowed the country people to follow their work. In 538, the Council of Orleans prohibited this country labor.
To give the more solemnity to the first day of the week, (as we learn from Lucius' Ecclesiastical History,) Sylvester, who was bishop of Rome while Constantine was Emperor, changed the name of Sunday, giving it the more imposing title of Lord's day.
It cannot be doubted, that the laws of Constantine did much to make the first day conspicuous throughout the empire, as all public business was forbidden upon it. They changed its character from a special day, in which, as a weekly festival, all kinds of business and labor were performed in city and country, to be, as Eusebius says, the very first. This imperial favor for the first day operated against all who conscientiously regarded the Sabbath from respect to the fourth commandment, in obedience to which the seventh day had always been observed; and if it had produced a general abandonment of its observance, it would not have been very surprising, considering the influence of court example, and the general ignorance and darkness of the age. This, however, does not appear to have been the case. The Sabbath was still extensively observed; and to counteract it the Council of Laodicea, about A. D. 350, passed a decree saying, "It is not proper for Christians to Judaize, and to cease from labor on the Sabbath, but they ought to work on that day, and put especial honor upon the Lord's day, as Christians. If any be found Judaizing, let him be anathematized."