It's really very simple. The demand of God to set aside a day to worship Him did not begin in Exodus 20. It began the last day of creation.
For Israel, that was Saturday.
Scripture and church history proves that for the New Testament church is was Sunday.
Although the burden of proof is not on the person who says, "Honor the the Lord's Day as God commands." The burden of proof is on the person who says, "You don't have to honor the Lord's Day as the Lord says. God took that back."
Where did God take it back?
You want to claim a standard that the Scriptures do not state and then put the burden on the opposition to prove that the Scriptures do not state the standard.
NOT.
It is in
your opinion the "day of the Lord" is Sunday.
YOU must prove that it is. I have no warrant to prove the negative.
There is only ONE occasion the Scriptures use the term "the Lord's Day."
It does not state what day, nor is there any historical record of which day. It could have just as well have been a Saturday for John was a Jew.
The Scripture principle has been given that six days a person is to work.
To hold to tradition of history does not Scriptural principle make.
The calendar is not an exact relic. If one were to attempt to keep the specific day, then every four years from January to leap day in February, Sunday actually falls on the celestial clock on Monday. Even then, the celestial calendar does not flow exactly like the human calendar.
YOU must prove that Sunday is the one and only day in which one is to rest and then demonstrate how that day works for all the preachers who have churches that allow them to take a different day for rest.
YOU must prove that Sunday was the first day of creation, when the celestial time keepers (sun, stars...) were not in existence until the fourth day.
YOU must prove that the PRINCIPLE of Scriptures is a law in which believers are to submit.
Because you cannot prove these things, it is better to abide in the Principle that the believe is to sacrifice daily, remain a temple of the Holy Spirit and follow the example of Christ - who worked (according to Jewish tradition) on the "Shabath" (Hebrew for rest), which was/is considered Saturday. If Christ worked, so can the believers.
I have separated the statements into blocks so that you can respond to each point with Scripture proof.
If you cannot use Scripture proof to dismantle the statements, then your view fails the test of Scripture.