Nevertheless, as it took place on Saturday evening after sundown, this meeting did occur on the first day of the week, not the seventh, or Sabbath.
Yes, but it is the end of a long day of Sabbath keeping, not the beginning of activities of a new day. To them, they would have perceived what they did as the end of a long day, not the beginning of a new one. They didn’t signify a change by what is recorded in the Scriptures.
IMO, it does not mean that you can’t keep Sunday. I’m not going to get into that arguemnent, but it’s not relevant to me. By this I mean that every one of our short-comings and sins are paid for by the Christ. The Sabbath is an issue of Truth and all Truth can really wait until the coming of the Messia, the Christ.