In no passage is it stated that men should keep the Jewish Sabbath to commemorate the old creation rest. It is the only commandment that could be and has been broken without breaking a moral law. Christ ignored completely the old Jewish Sabbath. The outpouring of the Holy Ghost came on Sunday. Thus both Christ and the Holy Spirit manifested themselves to the church on this day, completely ignoring the Jewish Sabbath.
Sin is sin whenever committed.
Anything sinful on Saturday or Sunday is sinful on every other day. I hope this helps you. Jesus Christ God Bless.