Jesus, “Lord Sabbath”, rose on the first day on the week, Sunday, the day AFTER Saturday, Sabbath. Henceforth beginning with his resurrection, his followers met together with Jesus himself on the following Sundays.
This “change” is consistent with the change from the Old Covenant of the Law being replaced by the New Covenant of Grace. Under the Old Covenant of the Law, you worked first and then on the seventh day, you rested.
Under the New Covenant of Grace, you begin by resting in the perfect and finished work of Christ on the cross. “IT IS FINISHED!”
In my catechism it asked;"What day is the Sabbath?
A: Saturday
Q: Why do we worship on Sunday instead of Saturday?
A: Because the Holy Catholic Church changed the day from Saturday to Sunday.
Q: By what authority did the church change the day from Saturday to Sunday?
A: By the plenitude of that divine power bestowed on her by Jesus Christ.
So there you pretty much have it.
I think the whole argument is gagging on a gnat while swallowing a camel.
——>Under the New Covenant of Grace, you begin by resting in the perfect and finished work of Christ on the cross. “IT IS FINISHED!”
Here’s the New Covenant (which the Jews rejected). What did God say about his LAWS?
Hebrews 8:
10For this is the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people:
11And they shall not teach every man his neighbour, and every man his brother, saying, Know the Lord: for all shall know me, from the least to the greatest.
12For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more.