[Responsibility2nd]

Where does it say to keep Sunday holy and disregard Sabbath?

Are you a Gentile? Then observing the Sabbath does not apply to you. Only the Jews wee commanded to keep the Sabbath.

[BipolarBob]

Do you love Jesus? He said “If you love Me, keep My Commandments”. He talked about Gentiles being grafted in. The Apostle Paul said Romans 3:31
“Do we then make void the law through faith? God forbid: yea, we establish the law.”