Well lets look at if Jesus or the Apostles change the day of worship from Saturday to Sunday the first day of the week? Here is a excerpt from a book by Kenneth A. Strand,
The Sabbath in Scripture and History.
"...The word
Sunday is not found in the Bible. In the New Testament the first day of the week is mentioned eight times. In none of the eight instances is the first day said to be a day of worship, never is it said to be the Christian substitute for the Old Testament Sabbath, and never do the texts suggest that the first day of the week should be regarded as a memorial of Christ's resurrection. Let us briefly consider each of the eight New Testament passages that mention the first day of the week.
Matthew 28:1, "After the sabbath, as the first day of the week was dawning, Mary Magdalene and the other Mary went to see the tomb. And suddenly there was a great earthquake. . . ." Jesus was crucified on Friday. He rested in the tomb over the Sabbath and rose early on Sunday morning. The verse indicates that the women disciples returned to the tomb at the very first opportunity after the death and burial of Jesus. Because the Sabbath came so soon after His burial, they could not approach the tomb again until after sundown on Sabbath evening. (The Sabbath began at sundown on the sixth day and ended at sundown on the seventh day; compare Lev. 23:32; Neh. 13:19;
Mark 1:21, 32) Early Sunday morning was the most convenient time for them to visit the tomb.
Mark 16:1, 2, "When the sabbath was over, Mary Magdalene, and Mary the mother of James, and Salome bought spices, so that they might go and anoint him. And very early on the first day of the week, when the sun had risen, they went to the tomb."Mark records the same events as Matthew with the additional information that the women visited the tomb early on the Sunday morning for the express purpose of anointing Jesus' body with spices.
Mark 16:9, "Now after he rose early on the first day of the week, he appeared first to Mary Magdalene, from whom he had cast out seven demons."This verse simply records that, after His resurrection early on the Sunday morning, Jesus appeared to Mary Magdalene.
Luke 23:54 ­ 24:1, "It [the day of Jesus' death and burial] was the day of Preparation, and the sabbath was beginning. The women who had come with him from Galilee followed, and they saw the tomb and how his body was laid. Then they returned, and prepared spices and ointments. On the sabbath they rested according to the commandment. But on the first day of the week, at early dawn, they came to the tomb, taking the spices that they had prepared." The Sabbath came a few hours after Jesus' death on the cross. The women disciples "rested the sabbath day according to the commandment" (
Luke 23:56, KJV). Then very early in the morning of the first day they visited the tomb to anoint the body of Jesus. The fact that they observed the Sabbath rest is sufficient indication that Jesus had never attempted to change the day or to suggest that after His death the first day would replace the Sabbath. Writing years after the event, Luke gave not the slightest hint that, even though the women disciples of Jesus observed the Sabbath, such a practice was no longer expected of Christians. He simply recorded that the Sabbath day "according to the commandment," which Jesus' followers were careful to observe, was the day after the crucifixion day (Friday), and before the resurrection day (Sunday).
John 20:1, "Early on the first day of the week, while it was still dark, Mary Magdalene came to the tomb and saw that the stone had been removed from the tomb."Mary Magdalene visited the tomb early the first day of the week. Nothing is said of Sunday as a day of worship or rest.
John 20:19, "When it was evening on that day, the first day of the week, and the doors of the house where the disciples had met were locked for fear of the Jews, Jesus came and stood among them and said, 'Peace be with you.'" On the evening of the first day of the week the disciples were assembled behind locked doors "for fear of the Jews." Jesus appeared to them at that time. The passage does not say that henceforth Sunday was to be the day for worship. Since it was the evening of the first day of the week that Jesus appeared to the disciples, it was after sundown. According to Jewish reckoning this was actually the beginning of the second day (Monday; compare Gen. 1:5, 8). A week later when Thomas happened to be present, Jesus met with the disciples again (verse 26). But, writing years later, John records nothing regarding Sunday as a day of Christian worship. John's narrative gives no warrant for regarding Sunday as a substitute for the Sabbath or as a day to be distinguished by Christians above any other day of the week. And there is no indication in the passage that Sunday should henceforth be observed as a memorial of Christ's resurrection.......