God made a certain day of rest for His people instead of the 7th day....that day is called "Today"..Hebrews 4
Brother, happy Sabbath! The “rest” promised is when made "perfect" are we “together” at the return of Jesus, as is clear in the fifth passage in red below in the letter to the Hebrews.
therefore, since the promise of entering his rest still stands, let us be careful that none of you be found to have fallen short of it. (Hebrews 4:1 NIV)
The promise to enter His rest remains as long as we are not found to have fallen short of it before Jesus returns.
There remains, then, a Sabbath-rest for the people of God; (Hebrews 4:9 NIV)
The day will come when we will rest from our effort, to persevere to do the will of God in a world that opposes our effort to remember the Sabbath, to keep it holy.
let us, therefore, make every effort to enter that rest, so that no one will perish by following their example of disobedience. (Hebrews 4:11 NIV)
We are making an effort to enter that rest, the effort of obedience to the ten commandments of Jesus.
you need to persevere so that when you have done the will of God, you will receive what he has promised. (Hebrews 10:36 NIV)
When we have done the will of God throughout our lives persevering over sin, we will receive what God has “promised” when Jesus returns for all of us “together”, to take us to the rooms that He told us He would prepare in His father’s house.
These were all commended for their faith, yet none of them received what had been promised, since God had planned something better for us so that only together with us would they be made perfect. (Hebrews 11:39-40 NIV)
The promised “rest” takes place after the dead rise, and when "we who are alive” are changed “in the twinkling of an eye”; therefore, what done is “today” is the decision to obey at least the ten commandments written by the finger of Jesus before His incarnation, so that we may show our reciprocal love for our Redeemer who gave His life for us.
If ye love me, keep my commandments. (John 14:15 KJV)
Jesus revealed that the ten commandments are His own commandments when He tells us that the voice of the Father had not been heard nor had His form been seen. Everyone had learned of the voice of God heard on the mountain and that Moses saw the form of the finger writing the ten commandments. Jesus revealed in that statement that He is the one they heard on the mountain and Moses saw the form of His finger writing His own ten commandments.
The 7th day Sabbath is the Sabbath of the Lord...as you've said is the sign between God and Israel...and that sign is Jesus Christ who is an Israelite and is God in the flesh...
The Sabbath is the “sign” of our obedience to Jesus' ten commandments that asks us in the fourth to remember the Sabbath, to keep it holy.
The Israelites are to observe the Sabbath, celebrating it for the generations to come as a lasting covenant. It will be a sign between me and the Israelites forever, for in six days the Lord made the heavens and the earth, and on the seventh day he rested and was refreshed. (Exodus 31:16-17 NIV)
This is the most expensive of the ten commandments given by Jesus to obey in a world that will force you to give up the job you prefer due to you wanting to remember the Sabbath, to keep it holy. We are “part” of “all Israel” and we are no longer Gentiles who have “come in” to the “part” of Israel that accepted Jesus in Romans 11:25-31 NIV. In the following passage ask yourself: when did the Lord “bless” the Sabbath and make it “holy”? He “blessed” and made “holy” the Sabbath when He rested on the seventh day of creation week, blessing that day in the Eden time zone and making it holy. A cycle of the week maintained by God's people from the beginning. Through the remnant, obedient to God, the weekly cycle spread throughout the world; that by obeying the Sabbath, until this day the site of Eden preserved is in our origin, where God taught us to count the days to remember the Sabbath rest. The Sabbath gives us the site of the true International Date Line (IDL), near the politically irregular line of nearby Islands, which change sides to favor trade with their neighbors.
Remember the Sabbath day by keeping it holy. Six days you shall labor and do all your work, but the seventh day is a sabbath to the Lord your God. On it you shall not do any work, neither you, nor your son or daughter, nor your male or female servant, nor your animals, nor any foreigner residing in your towns. For in six days the Lord made the heavens and the earth, the sea, and all that is in them, but he rested on the seventh day. Therefore the Lord blessed the Sabbath day and made it holy. (Exodus 20:8-11 NIV)
United in our hope of the soon return of Jesus, Jorge