The Old and New Testament are quite clear that the Old Testament obligation for Jews to observe the Sabbath days ended with the death & Resurrection of Christ. Jesus Himself confirmed the Sabbath as to it's timing was a ceremonial law of lesser importance than circumcision.
The Sabbath was a sign between God and Israel.
Exodus 31, 13
Speak thou also unto the children of Israel, saying, Verily my sabbaths ye shall keep: for it is a sign between me and YOU throughout your generations; that ye may know that I am the Lord that doth sanctify you.
The question of observing the ceremonial law was asked and answered long ago.
But there rose up certain of the sect of the Pharisees which believed, saying, That it was needful to circumcise them, and to command them to keep the law of Moses. And the apostles and elders came together for to consider of this matter. And when there had been much disputing, Peter rose up, and said unto them, Men and brethren, ye know how that a good while ago God made choice among us, that the Gentiles by my mouth should hear the word of the gospel, and believe. And God, which knoweth the hearts, bare them witness, giving them the Holy Ghost, even as he did unto us; And put no difference between us and them, purifying their hearts by faith. Now therefore why tempt ye God, to put a yoke upon the neck of the disciples, which neither our fathers nor we were able to bear? But we believe that through the grace of the Lord Jesus Christ we shall be saved, even as they.
Ministry of Death =
"And while the children of Israel were in the wilderness, they found a man that gathered sticks upon the sabbath day. And they that found him gathering sticks brought him unto Moses and Aaron, and unto all the congregation. And they put him in ward, because it was not declared what should be done to him. And the Lord said unto Moses, The man shall be surely put to death: all the congregation shall stone him with stones without the camp. And all the congregation brought him without the camp, and stoned him with stones, and he died; as the Lord commanded Moses." Numbers 15, 32
Galatians 4, 9
But now, after that ye have known God, or rather are known of God, how turn ye again to the weak and beggarly elements, whereunto ye desire again to be in bondage? Ye observe days, and months, and times, and years. I am afraid of you, lest I have bestowed upon you labour in vain.
The days, months, times and years are all identified in Leviticus 23.
That's about as clear as language can be - the "DISTINCATIVES" of Judaism were terminated by Christ when He fulfilled what no man could fulfil. In ancient times a person who won a battle would literally drag the corpse of the looser behind him, desecrating the corpse. This is what Jesus did to the Sabbath and other religious distinctives of Israel and that includes the Sabbath as to it's timing.