I cannot believe that you actually posted that reference in all seriousness. I thought at the very least, a "thus saith the Lord"... Scripture... Was the foundation of faith and practise for non Catholics. But that entire article was built solely on human reasoning. Some of it was just nonsense. For example...
It is obvious that resurrection day, is the day the Lord Made. (Really?)
Resurrection day is Sunday.
Sunday is the day the Lord made! (He made 7 days, and sanctified and blessed only one. )
The first day (Sunday) is the Lord's Day!
All built on presumption that the day David spoke of, "this is the day the Lord has made", was Sunday. It's nononsense and presumption. Going to extreme lengths to justify the sacredness of a day never sanctioned in scripture. Not once. That stuff happened on that day is no reason for granting that day anything more than what God says. And He said nothing. But He did say much about the 7th day, the Sabbath.
KJV Isaiah 58:13
13 If thou turn away thy foot from the sabbath, from doing thy pleasure on my holy day; and call the sabbath a delight, the holy of the LORD, honourable; and shalt honour him, not doing thine own ways, nor finding thine own pleasure, nor speaking thine own words...
KJV Ezekiel 20:12
12 Moreover also I gave them my sabbaths, to be a sign between me and them, that they might know that I am the LORD that sanctify them.
KJV Matthew 12:6-8
6 But I say unto you, That in this place is one greater than the temple.
7 But if ye had known what this meaneth, I will have mercy, and not sacrifice, ye would not have condemned the guiltless.
8 For the Son of man is Lord even of the sabbath day.
The Sabbath day is the only day in scripture that God specifically refers to in scripture as belonging to Him. The Lord's Day in revelation is the Sabbath.
You are entitled to your opinion which isn't convincing to me. I agree with the article that the Lord's Day in Revelation 1:10 being the Sabbath is a very weak argument and the actual evidence for the first day (Sunday) is much stronger for the reasons addressed in the article. Since you turn the Sabbath day into an idol, I'm not surprised by your reasoning.
Who is Isaiah 58:13 addressed to? The term
house of Jacob (vs. 1) is simply another way to refer to the
nation of Israel. Israel the patriarch was originally named Jacob. These terms are interchangeable as illustrated in Exodus 19:3-4: “Moses went up to God, and the Lord called to him from the mountain, saying, ‘Thus you shall say to the
house of Jacob and tell the
sons of Israel: You yourselves have seen what I did to the Egyptians."
Who is
"them" in Ezekiel 20:12? The
house of Israel. (vs. 13) You are not an Israelite living under the old covenant of law so stop acting like one.
Exodus 31:16 - Therefore the
children of Israel shall keep the Sabbath, to observe the Sabbath throughout their generations as a perpetual covenant. 17 It is a
sign between Me and the children of Israel forever; for in six days the Lord made the heavens and the earth, and on the seventh day He rested and was refreshed.
Deuteronomy 5:15 - And remember that
YOU were a slave in the land of Egypt, and the Lord your God brought
YOU out from there by a mighty hand and by an outstretched arm; therefore, the Lord your God commanded
YOU to keep the Sabbath day.
THE CHILDREN OF ISRAEL.
If Revelation 1:10 was the Sabbath, John would have said, "I was in the Spirit on the Sabbath" but that is not what John said. The article refutes your biased assumptions which are inconclusive.
Our 'sabbatismos' rest is found in Christ (Hebrews 4:9) in contrast with keeping the weekly Sabbath day under the law.
Colossians 2:16 - Therefore no one is to act as your judge in regard to food or drink or in respect to a festival or a new moon or a
Sabbath day— 17 things which are a
mere shadow of what is to come; but the substance belongs to Christ. It's time for you to stop living in the shadow on the old covenant plantation of law and embrace the substance in the new covenant.