The spiritual intent of the fourth commandment is upheld in born again believers every day, not just one day. Hence rom14:5
There is nothing in rom 14 that speaks of any specific set of sabbath days, as you mentioned.
Incidentally, Paul twice states in Rom ch14 ALL food is clean(14&20)
The Sabbath is a day we are to cease from work like GOD did from HIS. As GOD did. He ceased fro work. It is a physical rest on the Seventh Day we do because of the Spiritual rest which is the Gospel. No mention of the Sabbath in Romans 14 just days in general and also my friend no mention unclean food only COMMON.
Most translation in Romans 14:14 do not due the Spirit justice They do not translate the Greek properly. The word unclean in the KJV and others should be translated profane or common. It is the Greek word koinos and should be translated As shown below.
I know and am persuaded in the Lord Jesus, that nothing is profane of itself; except to the one considering anything to be profane, to that one it is profane.
(Rom 14:14 ABP)
I know and am persuaded in the Lord Jesus that nothing by itself is common; except to the one counting anything to be common, it is common.
(Rom 14:14 LITV-TSP)
G2839 κοινός koinos (koy-nos') adj.
1. common
2. (literally) shared by all or several
3. (ceremonially) profane
There is a difference between what was considered common and unclean. This Luke brings out in his telling through the Spirit of Peter's vision.
Wherein were
all manner of fourfooted beasts of the earth, and wild beasts, and creeping things, and fowls of the air. And there came a voice to him, Rise, Peter; kill, and eat. But Peter said, Not so, Lord; for I have never eaten any thing that is common
or unclean. And the voice spake unto him again the second time, What God hath cleansed, that call not thou common.
(Act 10:12-15 KJV)
A couple things need to be noted. First ALL MANNER of four footed beasts of the earth, and wild beasts, and creeping things, and fowls of the air were shown unto Peter. He Could have very easily killed and ate a clean animal.
Second thing that needs noted. The animals were inter mingling. Because the clean animals were touching the unclean they were impure. They were made common. They could not be readily eaten they needed to be purified.
Thirdly. Peter makes a distinction between the common and the unclean. He said, I have never eaten any thing that is common
or unclean. Which makes a distinction between the two. There is that which is considered common and that which is considered unclean.
The Forth thing that needs to be understood in Acts 10 is The word common here is the same Greek word used in Romans 14:14.
And lastly GOD never mentioned that HE cleansed the unclean only the common. He said, What God hath cleansed, that call not thou common.
The law for the believer is written in their minds and placed on their hearts. You must know in your mind what has been placed there. You must have heartfelt conviction of sin when you transgress the law within you. I have never been convicted of sin by failing to observe a set Saturday sabbath. How were you convicted to observe it? Only because you read law written in ink. That is not where the law is for the believer:
You show that you are a letter from Christ, the result of our ministry, written not with ink but with the Spirit of the living God, not on tablets of stone but on tablets of human hearts.2Cor3:3
Amen! A new ministry! Not on Tables of Stone but on the fleshy Tables of the Heart.
The righteousness which is of faith speaketh on this wise, Say not in thine heart, Who shall ascend into heaven? (that is, to bring Christ (the word; His Commandments and Statutes written in the Book of the Law) down from above: ) Or, Who shall descend into the deep? (that is, to bring up Christ (the word; His Commandments and Statutes written in the Book of the Law) again from the dead.) But what saith it? The word (Christ) is nigh thee, even in thy mouth, and in thy heart: that is, the word of faith, which we preach ; For Christ (the word; His Commandments and Statutes written in the Book of the Law in the heart and mouth) is the end of the (written) law ( on parchment and Tables of Stone) for righteousness to every one that believeth. that is, the word of faith, which we preach.
(Rom 10:4-8; Deut 30:11-14)
To further this point we will go to Hebrews chapter eight where the writer through the Spirit quotes Jeremiah. The same thing is being stated just in different words.
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 (Christ, the word; His Commandments and Statutes written in the Book of the Law) 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: For Christ (the word; His Commandments and Statutes written in the Book of the Law in the heart and mouth) is the end of the (written) law ( on parchment and Tables of Stone) for righteousness to every one that believeth. That is, the word of faith, which we preach.
(Heb 8:10)
It is a NEW ministry. Not of Tables of Stone and of parchment; the Book of the Law. But of the fleshly Tables of the Heart; Faith through Christ and of Christ.
Forasmuch as ye are manifestly declared to be the epistle of Christ ministered by us, written not with ink, but with the Spirit of the living God; not in tables of stone, but in fleshy tables of the heart. For Christ, the word; His Commandments and Statutes written in the Book of the Law in the heart and mouth is the end of the (written) law ( on parchment and Tables of Stone) for righteousness and the ministry to every one that believeth. that is, the word of faith, which we preach. And such trust have we through Christ to God-ward: Not that we are sufficient of ourselves to think any thing as of ourselves; but our sufficiency is of God;
(2Co 3:3-5)
And the LORD thy God will circumcise thine heart, and the heart of thy seed, to love the LORD thy God with all thine heart, and with all thy soul, that thou mayest live. And ye are complete in him, which is the head of all principality and power: In whom also ye are circumcised with the circumcision made without hands, in putting off the body of the sins of the flesh by the circumcision of Christ (the word; His Commandments and Statutes written in the Book of the Law in the heart and mouth): Buried with him in baptism, wherein also ye are risen with him through the faith of the operation of God, who hath raised him from the dead.
(Deu 30:6; Col 2:10-12)