B.B. Warfield nicely captures the first century transition from Jewish Sabbath observing on Saturdays to the Christian observance of the Lord’s Day on Sundays. His words follow…
Our Lord, too, following the example of his Father, when he had finished the work which it had been given him to do, rested on the Sabbath—in the peace of his grave. But he had work yet to do, and, when the first day of the new week, which was the first day of a new era, the era of salvation, dawned, he rose from the Sabbath rest of the grave, and made all things new. As C. F. Keil beautifully puts it;
“Christ is Lord of the Sabbath, and after the completion of his work, he also rested on the Sabbath. But he rose again on the Sabbath; and through his resurrection, which is the pledge to the world of the fruit of his redeeming work, he made this day the Lord’s Day for his Church, to be observed by it till the Captain of its salvation shall return, and having finished the judgment upon all his foes to the very last, shall lead it to the rest of that eternal Sabbath which God prepared for the whole creation through his own resting after the completion of the heaven and the earth.”
Christ took the Sabbath into the grave with him and brought the Lord’s Day out of the grave with him on the resurrection morn. It is true enough that we have no record of a commandment of our Lord’s requiring a change in the day of the observance of the Sabbath. Neither has any of the apostles to whom he committed the task of founding his Church given us such a commandment. By their actions, nevertheless, both our Lord and his apostles appear to commend the first day of the week to us as the Christian Sabbath. It is not merely that our Lord rose from the dead on that day. A certain emphasis seems to be placed precisely upon the fact that it was on the first day of the week that he rose. This is true of all the accounts of his rising, Luke, for example, after telling us that Jesus rose “on the first day of the week,” on coming to add the account of his appearing to the two disciples journeying to Emmaus, throws what almost seems to be superfluous stress on that also having happened “on that very day.” It is in John’s account, however, that this emphasis is most noticeable. “Now, on the first day of the week,” he tells us, “cometh Mary Magdalene early,” to find the empty tomb. And then, a little later: “When therefore it was evening on that day, the first day of the week,” Jesus showed himself to his assembled followers. The definition of the time here, the commentator naturally remarks, is “singularly full and emphatic.” Nor is this all. After thus pointedly indicating that it was on the evening of precisely the first day of the week that Jesus first showed himself to his assembled disciples, John proceeds equally sharply to define the time of his next showing himself to them as “after eight days”; that is to say it was on the next first day of the week that “his disciples were again within” and Jesus manifested himself to them. The appearance is strong that our Lord, having crowded the day of his rising with manifestations, disappeared for a whole week to appear again only on the next Sabbath. George Zabriskie Gray seems justified, therefore, in suggesting that the full effect of our Lord’s sanction of the first day of the week as the appointed day of his meeting with his disciples can be fitly appreciated only by considering with his manifestations also his disappearances. “For six whole days between the rising day and its octave he was absent.” “Is it possible to exaggerate the effect of this blank space of time, in fixing and defining the impressions received through his visits?”
We know not what happened on subsequent Sabbaths: there were four of them before the Ascension. But there is an appearance at least that the first day of the week was becoming under this direct sanction of the risen Lord the appointed day of Christian assemblies. That the Christians were early driven to separate themselves from the Jews (observe Acts 19:9) and had soon established regular times of “assembling themselves together,” we know from an exhortation in the Epistle to the Hebrews. A hint of Paul’s suggests that their ordinary day of assembly was on the first day of the week (1 Cor. 16:2). It is clear from a passage in Acts20:7 that the custom of “gathering together to break bread” “upon the first day of the week” was so fixed in the middle of the period of Paul’s missionary activity that though in haste he felt constrained to tarry a whole week in Troas that he might meet with the brethren on that day. It is only the natural comment to make when Friedrich Blass remarks: “It would seem, then, that that day was already set apart for the assemblies of the Christians.” We learn from a passing reference in the Apocalypse (Rev. 1:10) that the designation “the Lord’s Day” had already established itself in Christian usage. “The celebration of the Lord’s Day, the day of the Resurrection,” comments Johannes Weiss, “is therefore already customary in the churches of Asia Minor.” With such suggestions behind us, we cannot wonder that the Church emerges from the Apostolic Age with the first day of the week firmly established as its day of religious observance. Nor can we doubt that apostolic sanction of this establishment of it is involved in this fact.
That this was precisely what he did, and with him the whole Apostolic Church, there seems no room to question. And the meaning of that is that the Lord’s Day is placed in our hands, by the authority of the Apostles of Christ, under the undiminished sanction of the eternal law of God.
– excerpts from Foundations of the Sabbath in the Word of God by B.B. Warfield