In the New covenant God wants to sanctify and make holy his people not a day. The worshipping of days and temples and sacrificial offerings came to an end 2000 years ago. The Sabbath is a shadow of the rest we find in Christ and will only lead you away from Christ and back to the defunct law.
Isaiah 56:1-7—Thus says the Lord: “Keep justice, and do righteousness, for My salvation is about to come, and My righteousness to be revealed. Blessed is the man who does this, and the son of man who lays hold on it; who keeps from defiling the Sabbath, and keeps his hand from doing any evil.” Do not let the son of the foreigner who has joined himself to the Lord speak, saying, “The Lord has utterly separated me from His people”; nor let the eunuch say, “Here I am, a dry tree.” For thus says the Lord: “To the eunuchs who keep My Sabbaths, and choose what pleases Me, and hold fast My covenant, even to them I will give in My house and within My walls a place and a name better than that of sons and daughters; I will give them[a] an everlasting name that shall not be cut off. “Also the sons of the foreigner who join themselves to the Lord, to serve Him, and to love the name of the Lord, to be His servants—everyone who keeps from defiling the Sabbath, and holds fast My covenant—even them I will bring to My holy mountain, and make them joyful in My house of prayer. Their burnt offerings and their sacrifices will be accepted on My altar; for My house shall be called a house of prayer for all nations.” Here we see that Isaiah foretold the gospel going to the gentile world and the formation of the new testament church. And according to this prophecy, New Testament believers, both Jews and nonJews, will be Sabbath-keepers because the Sabbath is a constant reminder of the new covenant of God’s law written in the heart and the impossibility of salvation by works. It is not surprising, then, that we find the new testament church, both Jews and Gentiles, keeping the Sabbath:
Acts 13:13-44—Paul and his party . . . went into the synagogue on the Sabbath day and sat down. . . So when the Jews went out of the synagogue, the Gentiles begged that these words might be preached to them the next Sabbath. . . On the next Sabbath almost the whole city came together to hear the word of God.
Nor is is surprising that Jesus, as the embodiment of the new covenant, was a Sabbath keeper and envisioned his end-time people as Sabbath keepers:
Luke 4:16—So He came to Nazareth, where He had been brought up. And as His custom was, He went into the synagogue on the Sabbath day, and stood up to read. Mark 2:27-28—And He said to them, “The Sabbath was made for man, and not man for the Sabbath. Therefore the Son of Man is also Lord of the Sabbath.”
Matthew 24:20—Pray that your flight may not be in winter or on the Sabbath. The Sabbath will forever be for us a point of intimate contact in time with our Maker and Savior:
Isaiah 66:23—It shall come to pass that from one new moon to another, and from one Sabbath to another, all flesh shall come to worship before Me,” says the LORD.