James just didn't mention the 4'th as all at that time were keeping it and had no idea of using the Sunday in it's place and the 4'th reads,
Ex 20:8 Remember the sabbath day, to keep it holy.
You're already on record as admitting that you don't keep the Sabbath Holy according to the Law, as I explained in my first post to you yesterday. There is no commandment anywhere to keep the Sabbath
unholy, you've already admitted that the Sabbath shares the same disposition God exercised on the Mosaic covenant, and now you're trying to insert nonsense to fill in the silence the Biblical authors chose to write. This reveals a dedication to replace Scripture with your agenda that can't be reconciled with God's Word.
And for the fourth time, you've repeated the straw man fallacy that Sunday replaced the Sabbath. It did not. We don't have the Sabbath, and no one can 'change' an entity that doesn't exist within their tenure. You've already admitted we don't have the Sabbath outside the Mosaic covenant, and yet once again you couldn't help yourself but to repeat the Mosaic covenant as if it conveys a commandment outside of Judaism. It doesn't.
You can find uninspired opinions that claim to change the Sabbath, but none of them explain how they resurrected this component that depends on the Mosaic covenant to exist. It is bogus, and Sunday Sabbatarianism is as equally incompatible with Christianity as Saturday Sabbatarianism. Old-covenant "christianity" is a oxymoron that doesn't exist except in your tortured imagination. We have the liberty to assemble at any time, and we extend that same liberty to those who want to assemble on Saturday. Sunday became the common tradition for the reason our Lord chose the first day of the week to meet with us.
John 20
19 Then, the same day at evening, being the first day of the week, when the doors were shut where the disciples were assembled, for fear of the Jews, Jesus came and stood in the midst, and said to them, Peace be with you. 20 When He had said this, He showed them His hands and His side. Then the disciples were glad when they saw the Lord.
We're always glad to see the Lord, and we remember the first experience when we saw Him after His resurrection. In no way does this convey the Sabbath forward to those God redeemed as His purchased possession.