As far as I know there are no Sunday Sabbath laws then or now.
The Sabbath is Jewish and is a Saturday.
Pope John Paul II
We move from the "Sabbath" to the "first day after the Sabbath", from the seventh day to the first day: the dies Domini becomes the dies Christi! (Apostolic Letter, Dies Domini, Pope John Paul II, 1998 – para 18).
As far as I know, anything outside of the scriptures does not save anyone.
What is in the scriptures is the laying down of the life of Jesus Christ, because anything else means we still die in our sins. ( sin is unbelief in Jesus Christ.)
Through believing in Christ laying HIs life down and taking it again, we can take our life too, by first losing it, to find it again. ( as Christ did)
Then we can lay our lives down for others, as we layed our life down and found it again, far up high away from the talk that profits/saves nobody, of earthly devilish wisdom
James 1:18 Of his own will begat he us with the word of truth, that we should be a kind of firstfruits of his creatures.
19 Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
20 For the wrath of man worketh not the righteousness of God.
21 Wherefore lay apart all filthiness and superfluity of naughtiness, and receive with meekness the engrafted word, which is able to save your souls.
22 But be ye doers of the word, and not hearers only, deceiving your own selves.
James 3:14 But if ye have bitter envying and strife in your hearts, glory not, and lie not against the truth.
15 This wisdom descendeth not from above, but is earthly, sensual, devilish.
16 For where envying and strife is, there is confusion and every evil work.
17 But the wisdom that is from above is first pure, then peaceable, gentle, and easy to be intreated, full of mercy and good fruits, without partiality, and without hypocrisy.
18 And the fruit of righteousness is sown in peace of them that make peace.