This is an unbiblical fallacy, that stems from a failure to distinguish between God's rest (permanent) from the Sabbath (periodic). You show that you don't know the origin of the Sabbath.From the creation God has created the Sabbath in the Seventh day.
“You came down also on Mount Sinai,
And spoke with them from heaven,
And gave them just ordinances and true laws,
Good statutes and commandments.
You made known to them Your holy Sabbath,
And commanded them precepts, statutes and laws,
By the hand of Moses Your servant.
They're also circumcised according to the prerequisite necessary to comply with the Sabbaths ordained by God to the children of Israel (see Exodus 12:48). This is still the standard for those remaining under the Mosaic covenant.Till today the Jews are keeping the Sabbath day on Saturday.
Why do the churches worship on Sunday?
I answered this very question for another member on this very thread:
One would find a reasonable answer in the Augsburg Confession, written in 1530.
For those who judge that by the authority of the Church the observance of the Lord’s Day instead of the Sabbath-day was ordained as a thing necessary, do greatly err. Scripture has abrogated the Sabbath-day; for it teaches that, since the Gospel has been revealed, all the ceremonies of Moses can be omitted. And yet, because it was necessary to appoint a certain day, that the people might know when they ought to come together, it appears that the Church designated the Lord’s Day for this purpose; and this day seems to have been chosen all the more for this additional reason, that men might have an example of Christian liberty, and might know that the keeping neither of the Sabbath nor of any other day is necessary.
There are monstrous disputations concerning the changing of the law, the ceremonies of the new law, the changing of the Sabbath-day, which all have sprung from the false belief that there must needs be in the Church a service like to the Levitical, and that Christ had given commission to the Apostles and bishops to devise new ceremonies as necessary to salvation. These errors crept into the Church when the righteousness of faith was not taught clearly enough.