This is exactly why I don't see how these two verses (got any more?) Support what you want them to support.
We can easily get the context by studying a bit on how Sabbath was and is observed.
This is why the meal after Shabbat (sundown on Saturday) makes sense.
You are reading back into the text 100s of years of church tradition. I am looking at it through a Hebrew lens, which was the looking glass of the time, when these accounts were written about.
Sunday is the first day of the week, not the Seventh.
" The practice of meeting together on the first day of the week for the celebration of the Eucharistic Sacrifice is indicated in
Acts 20:7;
1 Corinthians 16:2; in
Apocalypse 1:10, it is called the Lord's day. In the
Didache (14) the injunction is given: "On the Lord's Day come together and break bread. And give thanks (offer the Eucharist), after confessing your
sins that your sacrifice may be pure". St. Ignatius (Ep. ad Magnes. ix) speaks of
Christians as "no longer observing the
Sabbath, but living in the observance of the Lord's Day, on which also Our Life rose again". In the Epistle of Barnabas (xv) we read: "Wherefore, also, we keep the eighth day (i.e. the first of the week) with joyfulness, the day also on which
Jesus rose again from the dead"."
CATHOLIC ENCYCLOPEDIA: Sunday
"It has come to my ears that certain men of perverse spirit have sown among you some things that are wrong and opposed to the
holy faith, so as to forbid any work being done on the
Sabbath day. What else can I call these but preachers of
Antichrist, who, when he comes, will
cause the Sabbath day as well as the Lord's day to be kept free from all work. For, because he pretends to die and rise again, he wishes the Lord's day to be had in reverence; and, because he compels the people to judaize that he may bring back the outward rite of the law, and subject the perfidy of the
Jews to himself, he wishes the
Sabbath to be observed."
CHURCH FATHERS: Registrum Epistolarum, Book XIII, Letter 1 (Gregory the Great)
" And yet your nameless metropolitan disputant calls such an one carnal, even though for five successive days of the week, excepting the seventh and the Lord's day, he so fast as to withhold all refection from the body;
...
Scripture states further concerning the apostle: When he therefore had come up again, and had broken bread, and eaten and talked a long while, even till break of day, so he departed. Acts 20:11 Far be it from us to accept this as affirming that the apostles were accustomed to fast habitually on the Lord's day. For the day now known as the Lord's day was then called the first day of the week, as is more plainly seen in the Gospels; for the day of the Lord's resurrection is called by Matthew μία σαββάτων, and by the other three evangelists ἡ μία (τῶν) σαββάτων, and it is well ascertained that the same is the day which is now called the Lord's day. Either, therefore, it was after the close of the seventh day that they had assembled — namely, in the beginning of the night which followed, and which belonged to the Lord's day, or the first day of the week — and in this case the apostle, before proceeding to break bread with them, as is done in the sacrament of the body of Christ, continued his discourse until midnight, and also, after celebrating the sacrament, continued still speaking again to those who were assembled, being much pressed for time in order that he might set out at dawn upon the Lord's day; or if it was on the first day of the week, at an hour before sunset on the Lord's day, that they had assembled, the words of the text, Paul preached unto them, ready to depart on the morrow, themselves expressly state the reason for his prolonging his discourse — namely, that he was about to leave them, and wished to give them ample instruction. The passage does not therefore prove that they habitually fasted on the Lord's day, but only that it did not seem meet to the apostle to interrupt, for the sake of taking refreshment, an"
CHURCH FATHERS: Letter 36 (St. Augustine)
"5. We are not afraid to meet your scoff at the
Sabbath, when you call it the fetters of Saturn. It is a silly and unmeaning expression, which occurred to you only because you are in the
habit of worshipping the sun on what you call Sunday.
What you call Sunday we call the Lord's day, and on it we do not worship the sun, but the Lord's resurrection. And in the same way, the fathers observed the rest of the
Sabbath, not because they worshipped Saturn, but because it was incumbent at that time, for it was a shadow of things to come, as the apostle testifies.
Colossians 2:17 The
Gentiles, of whom the apostle says that they "worshipped and served the creature rather than the Creator,"
Romans 1:25 gave the names of their gods to the days of the week. And so far you do the same, except that you worship only the two brightest luminaries, and not the rest of the stars, as the
Gentiles did. Besides, the
Gentiles gave the names of their gods to the months. In
honor of Romulus, whom they
believed to be the son of Mars, they dedicated the first month to Mars, and called it March. The next month, April, is named not from any god, but from the word for opening, because the buds generally open in this month. The third month is called May, in
honor of Maia the mother of Mercury. The fourth is called June, from Juno. The rest to December used to be named according to their number. The fifth and sixth, however, got the names of July and August from men to whom divine
honors were decreed; while the others, from September to December, continued to be named from their number. January, again, is named from Janus, and February from the
rites of the Luperci called Februæ. Must we say that you worship the god Mars in the month of March? But that is the month in which you hold the feast you call Bema with great pomp. But if you think it allowable to observe the month of March without thinking of Mars, why do you try to bring in the name of Saturn in connection with the rest of the seventh day enjoined in Scripture, merely because the
Gentiles call the day Saturday? The Scripture name for the day is
Sabbath, which means rest. Your scoff is as unreasonable as it is profane."
CHURCH FATHERS: Contra Faustum, Book XVIII (Augustine)
"2. There are other things, however, which are different in different places and countries:
e.g.,
some fast on Saturday, others do not; some partake daily of the body and blood of
Christ, others receive it on stated days: in some places no day passes without the
sacrifice being offered; in
others it is only on Saturday and the Lord's day,
or it may be only on the Lord's day. In regard to these and all other variable observances which may be met anywhere, one is at liberty to comply with them or not as he chooses; and there is no better rule for the wise and serious
Christian in this matter, than to conform to the practice which he finds prevailing in the
Church to which it may be his lot to come. For such a custom, if it is clearly not contrary to the
faith nor to sound morality, is to be held as a thing indifferent, and ought to be observed for the sake of fellowship with those among whom we live."
CHURCH FATHERS: Letter 54 (St. Augustine)
" I, indeed, communicate four times a week, on the Lord's day, on Wednesday, on Friday, and on the
Sabbath,"
CHURCH FATHERS: Letter 93 (St. Basil)
Romans 14
Easy-to-Read Version
Don’t Criticize Others
14 Be willing to accept those who still have doubts about what believers can do. And don’t argue with them about their different ideas. 2 Some people believe they can eat any kind of food,[a] but those who have doubts eat only vegetables. 3 Those who know they can eat any kind of food must not feel that they are better than those who eat only vegetables. And those who eat only vegetables must not decide that those who eat all foods are wrong. God has accepted them. 4 You cannot judge the servants of someone else. Their own master decides if they are doing right or wrong. And the Lord’s servants will be right, because the Lord is able to make them right.
5
Some people might believe that one day is more important than another. And others might believe that every day is the same. Everyone should be sure about their beliefs in their own mind. 6 Those who think one day is more important than other days are doing that for the Lord. And those who eat all kinds of food are doing that for the Lord. Yes, they give thanks to God for that food. And those who refuse to eat some foods do that for the Lord. They also give thanks to God.
7 We don’t live or die just for ourselves. 8 If we live, we are living for the Lord. And if we die, we are dying for the Lord. So living or dying, we belong to the Lord. 9 That is why Christ died and rose from death to live again—so that he could be Lord over those who have died and those who are living.
10 So why do you judge your brother or sister in Christ? Or why do you think that you are better than they are? We will all stand before God, and he will judge us all. 11 Yes, the Scriptures say,
“‘As surely as I live,’ says the Lord,
‘Everyone will bow before me;
everyone will say that I am God.’”
12 So each of us will have to explain to God about the things we do.
Don’t Cause Others to Sin
13 So we should stop judging each other. Let’s decide not to do anything that will cause a problem for a brother or sister or hurt their faith. 14 I know that there is no food that is wrong to eat. The Lord Jesus is the one who convinced me of that. But if someone believes that something is wrong, then it is wrong for that person.
15 If you hurt the faith of your brother or sister because of something you eat, you are not really following the way of love. Don’t destroy anyone’s faith by eating something they think is wrong. Christ died for them. 16 Don’t allow what is good for you to become something they say is evil. 17 In God’s kingdom, what we eat and drink is not important. Here is what is important: a right way of life, peace, and joy—all from the Holy Spirit. 18 Whoever serves Christ by living this way is pleasing God, and they will be accepted by others.
19 So let’s try as hard as we can to do what will bring peace. Let’s do whatever will help each other grow stronger in faith. 20 Don’t let the eating of food destroy the work of God. All food is right to eat, but it is wrong for anyone to eat something that hurts the faith of another person. 21 It is better not to eat meat or drink wine or do anything else that hurts the faith of your brother or sister.
22
You should keep your beliefs about these things a secret between yourself and God. It is a blessing to be able to do what you think is right without feeling guilty. 23 But anyone who eats something without being sure it is right is doing wrong. That is because they did not believe it was right. And if you do anything that you believe is not right, it is sin.
