Mat 28:1 In the end of the sabbath, as it began to dawn toward the first day of the week, came Mary Magdalene and the other Mary to see the sepulcher. Mar 16:2 And very early in the morning the first day of the week, they came unto the sepulcher at the rising of the sun. Luk 24:1 Now upon the first day of the week, very early in the morning, they came unto the sepulcher, bringing the spices which they had prepared, and certain others with them. Joh 20:1 The first day of the week cometh Mary Magdalene early, when it was yet dark, unto the sepulcher, and seeth the stone taken away from the sepulcher. Act 20:7 And upon the first day of the week, when the disciples came together to break bread, Paul preached unto them, ready to depart on the morrow; and continued his speech until midnight. Rev 1:10 I was in the Spirit on the Lord's day, and heard behind me a great voice, as of a trumpet. Because Sabbath (which runs from Friday sundown to Saturday sundown) was past, sometime in the wee hours of the night, Jesus rose from His tomb. Some might make a case that technically, the Saturday might not have reached midnight, thus not being Sunday yet, but lest you forget, the Jewish day is from sundown to sundown, hence after Sabbath on Saturday (at sundown), their next day (the first day of the week) officially began. The early church grew to call this "The Lord's Day". This developed into the traditional Sunday service.

For the husband is the head of the wife, even as Christ is the head of the church: and he is the saviour of the body. Ephesians 5:23

Pagans worshiped their god, the Sun god, on Sunday. Constantine "converted" this day to a "Christian" holy day so as to marry these religions.