Makes true statements about Sabbath and the law that you can prove with scriptures when questioned.
1.God's covenants contain the righteous requirements He required His people to follow.
2.When God gave the law as a covenant, the Sabbath is the sign of that covenant.
3.The New Covenant does not have Sabbath as the sign of that covenant.
4.The Abrahamic Covenant and New Covenant are eternal covenants.
5.The Mosaic Covenant is not an eternal covenant.
6. Jeremiah 31:31-34 God promised a New Covenant unlike the one given at Sinai.
7. Paul made it crystal clear that the law was added to the Abrahamic covenant because the people the people were sinning after freedom from Egypt.
8. The law was would serve until the seed would come.
The Sabbath is the one command God specifically commanded to remember, yet it is the one that you specifically want to forget. God's righteousness is eternal, so the way to act in accordance with God's righteousness existed before God made any covenants with man, so it is therefore not dependent on any particular covenant, though it has been revealed through them. Likewise, sin was in the world before the Law was given, so the Law did not change the way to practice righteousness or to avoid practicing sin, but rather it revealed what has always been and will always be the way to do that. So there is a distinction between a set of instructions for how to practice righteousness and a covenant agreement to follow those instructions. Those instructions will always be valid as long as God's righteousness remains eternal, so anyone who wants to find out how to practice righteousness can do so by reading God's eternal instructions for the in the Mosaic Law regardless of what covenant they are under, but as part of the New Covenant, those who do not follow those instructions are not children of God (1 John 3:10). So while the Mosaic Covenant has become obsolete, God's eternal righteousness and His eternal instructions for how to reflect His righteousness did not become obsolete along with it.
In Luke 16:16, Jesus said that the Law and the Prophets were until John and that since then the Gospel of the Kingdom has been preached, namely to repent from our sins for the Kingdom of God is at hand. The Mosaic Law is how the people knew what sin is, so repenting from our disobedience to it is an integral part of the Gospel message. Neither John nor Jesus came with the message that the Law has been done away with and repentance is no longer necessary, but rather they both taught repentance, so clearly Jesus was not speaking about the Law ending with John. Jesus went on in Luke 16:17 to say that it would be easier for heaven and earth to disappear than for the least part to disappear from the Law and in Luke 16:18 to teach obedience to the Law. As such, I see no good grounds to interpret saying that the law was until the seed would come as speaking about the Law ending with Jesus. Now that Jesus has come we have a superior teacher, but the subject matter is still how to walk in God's ways in obedience to the Law according to what Jesus taught by word and by example.
Jesus taught how to keep the Sabbath through His interactions with the Pharisees. However, he was sinless, so he set a perfect example of how to walk in obedience to the Mosaic Law, which means that he would have still taught full obedience to it by example even if he had said nothing, including keeping the Sabbath throughout his ministry, and as his followers we are told to follow his example (1 Peter 2:21-22), to walk in the same way he walked (1 John 2:3-6), and to be imitators of Him (1 Corinthians 11:1). Following Jesus is not just for Jews, but for Gentiles to, but Gentiles can't follow him by refusing to repent and follow the Law that he followed and taught his followers to obey by word and by example.
In Colossians 2:16, they were keeping God's holy days in obedience to God's commands in accordance with Christ's example, they were being judged by those teaching human precepts and traditions, self-made religion, asceticism, and severity to the body (Colossians 2:16), and Paul was writing to encourage them not to let any man judge them and keep them from obeying God. In Acts 15:21, it has the understanding that Gentiles would continue to learn about how to obey Moses by hearing him taught every Sabbath in the synagogues. In 1 Peter 1:13-16, we are told to have a holy conduct for God is holy, which is a quote from Leviticus where God was giving instructions for how to have a holy conduct, which straightforwardly includes keeping God's Sabbaths holy (Leviticus 19:2-3).
In Jeremiah 31:33-34, it says that the New Covenant involves God writing His Law on our heart, so while it is true that the New Covenant is not like the Mosaic Covenant, the difference is not in regard to God's eternal Law, but rather as those verses describe, the difference is in regard no longer having man as a mediator and in regard to being based on better promises, which is exactly how Hebrews 8:6 describes the differences.