I stated "the specific day of Matthew 24:20 applies to Israel where and when the AOD appears. Meaning that while the end of days is a world-wide event, the context is that of seeing visible manifestation:
And Jesus went out, and departed from the temple: and his disciples came to him for to shew him the buildings of the temple. And Jesus said unto them, See ye not all these things? verily I say unto you, There shall not be left here one stone upon another, that shall not be thrown down. And as he sat upon the mount of Olives, the disciples came unto him privately, saying, Tell us, when shall these things be? and what shall be the sign of thy coming, and of the end of the world? (Matthew 24:2,3)
"When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand:) Then let them which be in Judaea flee into the mountains: (Matthew 24:15-16) For wheresoever the carcase is [be], there will the eagles be gathered together. (Matthew 24:28)
Thus the mention of the Sabbath goes with the visible destruction of the visible temple, and the AOD sitting therein, and the fleeing from visible Judaea flee into the visible mountains, these all being localized manifestation in answer to the apostles in Jerusalem question "when shall these things be? and what shall be the sign of thy coming, and of the end of the world?" (Matthew 24:3) And the reason for praying that this flight "be not in the winter, neither on the sabbath day" is in consideration of how much harder this would be in that location, not in Arizona.
To use the mention of the Sabbath as teaching that the church is to observe this day is also teach that its worships in the temple in Judaea and is to flee to the mountains, rather than this describing localized manifestation of the end and what the specific reaction should be in that location to the apostles whom the Lord is addressing, not to those in Kansas, but who can see the world-wide aspects signifying the coming of the "End" but have no temple, Judea, or mountains.
In conclusion, stop trying to read into Scripture what is not manifest in the only wholly inspired substantive authoritative record of what the NT church believed, which is Scripture, in particular Acts through Revelation, which best shows how the NT church understood the gospels: In which there is no reiteration of the 4th commandment, nor example of an established NT church observing it, while the Holy Spirit reveals in what way the "new covenant" is "Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt." (Jeremiah 31:31-32)
That such literal observance of laws as regarded meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days, (Colossians 2:16) "days, and months, and times, and years" (Galatians 4:10) "meats and drinks, and divers washings, and carnal ordinances, imposed on them until the time of reformation," (Hebrews 9:10) foreshadowed Christ. "For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh: That the righteousness of the law might be fulfilled in us, who walk not after the flesh, but after the Spirit." (Romans 8:3-4) Christ.
THE NEW COVENANT
Jeremiah 31:31 “Behold, the days are coming, says the Lord, when I will make a new covenant with the house of Israel and with the house of Judah— 32 not according to the covenant that I made with their fathers in the day that I took them by the hand to lead them out of the land of Egypt, My covenant which they broke, though I was a husband to them, says the Lord. 33 But this is the covenant that I will make with the house of Israel after those days, says the Lord: I will put My law in their minds, and write it on their hearts; and I will be their God, and they shall be My people.
Heb 8:10 For 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:
Heb 10:16 This is the covenant that I will make with them after those days, saith the Lord, I will put my laws into their hearts, and in their minds will I write them:
Romans 2: 11For there is no respect of persons with God.
12For as many as have sinned without law shall also perish without law: and as many as have sinned in the law shall be judged by the law;
13(For not the hearers of the law are just before God, but the doers of the law shall be justified.
Revelation 11:15And the seventh angel sounded; and there were great voices in heaven, saying, The kingdoms of this world are become the kingdoms of our Lord, and of his Christ; and he shall reign for ever and ever.
16And the four and twenty elders, which sat before God on their seats, fell upon their faces, and worshipped God,
17Saying, We give thee thanks, O Lord God Almighty, which art, and wast, and art to come; because thou hast taken to thee thy great power, and hast reigned.
18And the nations were angry, and thy wrath is come, and the time of the dead, that they should be judged, and that thou shouldest give reward unto thy servants the prophets, and to the saints, and them that fear thy name, small and great; and shouldest destroy them which destroy the earth.
19And the temple of God was opened in heaven, and there was seen in his temple the ark of his testament: and there were lightnings, and voices, and thunderings, and an earthquake, and great hail.
Exo 24:12 And the LORD said unto Moses, Come up to me into the mount, and be there: and I will give thee tables of stone, and a law [towrah - H8451], and commandments which I have written; that thou mayest teach them.
Exo 25:16 And thou shalt put into the ark the testimony which I shall give thee.
Exo 31:18 And he gave unto Moses, when he had made an end of communing with him upon mount Sinai, two tables of testimony, tables of stone, written with the finger of God.
Exo 32:15 And Moses turned, and went down from the mount, and the two tables of the testimony were in his hand: the tables were written on both their sides; on the one side and on the other were they written.
Josh 4:16 Command the priests that bear the ark of the testimony, that they come up out of Jordan.
Deu 4:13 And he declared unto you his covenant, which he commanded you to perform, even ten commandments; and he wrote them upon two tables of stone.
Num 10:33 And they departed from the mount of the LORD three days' journey: and the ark of the covenant of the LORD went before them in the three days' journey, to search out a resting place for them.
1 Sam 4:5 And when the ark of the covenant of the LORD came into the camp, all Israel shouted with a great shout, so that the earth rang again.
Heb 9:4 Which had the golden censer, and the ark of the covenant overlaid round about with gold, wherein was the golden pot that had manna, and Aaron's rod that budded, and the tables of the covenant;
"So the Ten Commandments written on stone were called the tables of testimony, and the tables of the covenant, and the ark that contained them was called the ark of the testimony, and the ark of the covenant. Note these next verses closely:
Isa 8:16 Bind up the testimony, seal the law [towrah - H8451] among my disciples.
Isa 8:20 To the law [towrah - H8451] and to the testimony: if they speak not according to this word, it is because there is no light in them.
What is the testimony spoken of in the above two verses?
The testimony sealed among the disciples of God in Isaiah 8:16 is the Ten Commandments, the Law of God written on two tablets and contained in the Ark of the Testimony. So according to Isaiah 8:20 anyone who speaks not according to the Ten Commandments of God has no light in them:" See article linked to previously in post 49
Eccl 12:13Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man. 14For God shall bring every work into judgment, with every secret thing, whether it be good, or whether it be evil.
And, anyone who says that God's 10 commandment law was all inclusive in the law of Moses, and was nailed to the cross, has made a grave error.