OK.
Joh 14:21 He that hath my commandments, and keepeth them, he it is that loveth me: and he that loveth me shall be loved of my Father, and I will love him, and will manifest myself to him.
No, there is nothing in the Bible that changes the Sabbath. It was Rome that changed it - And she declares it as her mark of authority...
And therefore you claim those who celebrate the Lord's Day are not following the commandments of God.
So, in your view: are the Protestants following the Church in this or are they guilty of their own grievous scriptural error?