To add to my previous post--I don't see any reason not to honor the sabbath and keep it holy-but never to become legalistic about it. I am still trying to sort the thing out as I just begun to study it very recently.
It is one of the 10 Commandments written by the very finger of God in STONE. Jesus said, " If you love me, you will keep my commandments." I have always attended church on Sunday. I have been looking and looking for a new church--during this time I have been studying denominations and was disturbed by all the false teaching I discovered in ALL of them. One day, I was looking at the Commandments and began to wonder why we keep all the Commandments with exception of the Sabbath--I looked up bible verses and could find nothing in the New Testament where the Sabbath was done away with. There are a number of the verses in Acts where both Jews and Gentiles gathered to hear Paul speak on the Sabbath--again they met every day, but why do meet on Sunday--that is as an assembly--only because Constantine changed Sunday to the Sabbath--it's like the inverted cross of Satanists--the Sabbath says God's work is finished. Sunday is the opposite of that. There is more than just about a day--God sanctified it--therefore it is into perpetuity..
Note that when it says let no one judge you on xyz...or on a sabbath day--this is different than THE Sabbath--these were special days, like Holidays. Again, this is not about legalism--as I said, I am still trying to come to a better understanding of this myself.
Just before He did, Lord Jesus declared "It is FINISHED!" Everything to do with the old covenant is finished. It was only a shadow of what was to come anyway. I prefer the light to the shadows any time!
The real rest for the Christian comes when he quits trying to live up to God's standard. Yes, God put His law on stone. You can't have fellowship with a stone. God's intent was that His law would be written on our hearts. He intends not only to tell us what we should do, but be the power within to do it.
I was in the Navy when I got saved. Every day is pretty much the same at sea. We had most of Sunday off if we were not on shift work. But if the need arose, I was on call 24/7. I was not in a position to tell the captain I was not working because it was the sabbath. In those days, I had no idea what a sabbath was anyway.
Once I worked 3 weeks straight with only a few hours sleep a night. It's military life. God did not jump all over me because I broke His law. In the OT, a man was killed for collecting firewood on the Sabbath. Those who want to live by the law should expect to be judged by it also. I prefer to be saved by grace.
I've been saved 50 years now. Our small group fellowships daily. I've never observed the sabbath. I've survived to now!