Did the Catholic Church changed the Sabbath to Sunday?

[Meowzltov]

That isn't what Moses says. And I don't care what non Bible sources you quote say.

And it isn't what YOU say either.

 

[BobRyan]

BobRyan said: ↑
The reason for changing the Lord's day from Saturday to Sunday lies in the fact that to the Christian church the first day of the week had been made double ho

So long as we understand that although the Catholic Church changed the SOLEMNITY from Saturday to Sunday, we didn't change the Sabbath from Saturday to Sunday. We switched our worship from Sabbath to the Lord's Day. If you look up Sabbath in the Catholic Encyclopedia, it will still say it goes from Friday sundown until Saturday sundown.

The text says "changing the Lord's day from Saturday" admitting that this is the day as given in the Bible. In my initial statements I was merely trying to make that same point - that the Bible has the Lord's Day on Saturday.

 

[BobRyan]

in the example below - the TEN commandments -- all TEN (including the Sabbath) are being affirmed in the catholic Catechism

QUOTE="BobRyan, post: 67484856, member: 235244"]Since the thread does mention Catholic claims...

===========================

Originally Posted by BobRyan Catholic Catechism claims that ALL TEN of the TEN Commandments - the [FONT=&quot]Decalogue - remains binding such that the Sabbath Commandment is simply "bent" to point to week-day 1 and all 10 remain binding.


2056 The word "Decalogue" means literally "ten words."11 God revealed these "ten words" to his people on the holy mountain. They were written "with the finger of God,"12 unlike the other commandments written by Moses.13 They are pre-eminently the words of God. They are handed on to us in the books of Exodus 14 and Deuteronomy.15 Beginning with the Old Testament, the sacred books refer to the "ten words,"16 but it is in the New Covenant in Jesus Christ that their full meaning will be revealed.[/FONT]

2072 Since they express man's fundamental duties towards God and towards his neighbor, the Ten Commandments reveal, in their primordial content, grave obligations.They are fundamentally immutable, and they oblige always and everywhere. No one can dispense from them. the Ten Commandments are engraved by God in the human heart.[/FONT]

2063.... the words of the Decalogue remain likewise for us Christians. Far from being abolished, they have received amplification and development from the fact of the coming of the Lord in the flesh.26

2068 The Council of Trent teaches that the Ten Commandments are obligatory for Christiansand that the justified man is still bound to keep them;28 The Second Vatican Council confirms: "The bishops, successors of the apostles, receive from the Lord . . . the mission of teaching all peoples, and of preaching the Gospel to every creature, so that all men may attain salvation through faith, Baptism and the observance of the Commandments."29

(Application in James 2)
2069 The Decalogue forms a coherent whole. Each "word" refers to each of the others and to all of them; they reciprocally condition one another. the two tables shed light on one another; they form an organic unity. To transgress one commandment is to infringe all the others.30 One cannot honor another person without blessing God his Creator. One cannot adore God without loving all men, his creatures. the Decalogue brings man's religious and social life into unity.

 

[BobRyan]

Catholic Encyclopedia -

NewAdvent

CATHOLIC ENCYCLOPEDIA: Sunday

Sunday was the first day of the week according to the Jewish method of reckoning, but for Christians it began to take the place of the Jewish Sabbath in Apostolic times as the day set apart for the public and solemn worship of God

St. Cæsarius of Arles in the sixth century teaching that the holy Doctors of the Church had decreed that the whole glory of the Jewish Sabbath had been transferred to the Sunday, and that Christians must keep the Sunday holy in the same way as the Jews had been commanded to keep holy the Sabbath Day. He especially insisted on the people hearing the whole of the Mass and not leaving the church after the Epistle and the Gospel had been read. He taught them that they should come to Vespers and spend the rest of the day in pious reading and prayer. As with the Jewish Sabbath, the observance of the Christian Sunday began with sundown on Saturday and lasted till the same time on Sunday

The obligation of rest from work on Sunday remained somewhat indefinite for several centuries. A Council of Laodicea, held toward the end of the fourth century, was content to prescribe that on the Lord's Day the faithful were to abstain from work as far as possible. At the beginning of the sixth century St. Caesarius, as we have seen, and others showed an inclination to apply the law of the Jewish Sabbath to the observance of the Christian Sunday. The Council held at Orléans in 538 reprobated this tendency as Jewish and non-Christian. From the eight century the law began to be formulated as it exists at the present day, and the local councils forbade servile work, public buying and selling, pleading in the law courts, and the public and solemn taking of oaths. There is a large body of civil legislation on the Sunday rest side by side with the ecclesiastical. It begins with an Edict of Constantine, the first Christian emperor, who forbade judges to sit and townspeople to work on Sunday. He made an exception in favour of agriculture. The breaking of the law of Sunday rest was punished by the Anglo-Saxon legislation in England like other crimes and misdemeanours. After the Reformation, under Puritan influence, many laws were passed in England whose effect is still visible in the stringency of the English Sabbath. Still more is this the case in Scotland.
================================================== end CE

Current Catechism on the Sabbath Commandment -

IN BRIEF
2189 "Observe the sabbath day, to keep it holy" (Deut 5:12). "The seventh day is a sabbath of solemn rest, holy to the Lord" (Ex 31:15).
2190 The Sabbath, which represented the completion of the first creation, has been replaced by Sunday which recalls the new creation inaugurated by the Resurrection of Christ.
2191 The Church celebrates the day of Christ's Resurrection on the "eighth day," Sunday, which is rightly called the Lord's Day (cf. SC 106).
2192 "Sunday . . . is to be observed as the foremost holy day of obligation in the universal Church" (CIC, can. 1246 § 1). "On Sundays and other holy days of obligation the faithful are bound to participate in the Mass" (CIC, can. 1247).


I am showing that...

1. they maintain that ALL TEN of the Ten Commandments are still in force.
2. They apply the force of the Sabbath Commandment to week-day-1.
3. This evolved over time from Sabbath keeping, to war against the Sabbath Commandment .. to enforcement of Sunday under the cover of the Sabbath Commandment. Such that today when you look up what they say about the Sabbath Commandment - they apply it today - to week-day-1

It came about in stages with the 3rd stage - uniquely Catholic.

 

[BobRyan]

QUOTE="BobRyan, post: 67333148, member: 235244"]

The more documented view --

Pope John Paul II

Dies Domini pt 13 -
"the Sabbath ...is therefore rooted in the depths of God's plan. This is why unlike many other laws - it is not within the context of strictly cultic (Jewish) stipulations but within the Decalogue the "ten words" which represent the very pillars of moral life inscribed on the human heart!! In setting this commandment within the context of the basic structure of ethics, Israel and then the church declare that they consider it not just a matter of community religious discipline but a defining and indelible expression of our relationship to God, announced and expounded by biblical revelations.

=========================

No wait - 3 Catholics... 2 views.

their own commentary on the Baltimore Catechism -

1965 -- first published 1959

(from "The Faith Explained" page 243

"we know that in the O.T it was the seventh day of the week - the Sabbath day- which was observed as the Lord's day. that was the law as God gave it...'remember to keep holy the Sabbath day.. the early Christian church determined as the Lord's day the first day of the week. That the church had the right to make such a law is evident...

The reason for changing the Lord's day from Saturday to Sunday lies in the fact that to the Christian church the first day of the week had been made double holy...

nothing is said in the bible about the change of the Lord's day from Saturday to Sunday..that is why we find so illogical the attitude of many non-Catholic who say they will believe nothing unless they can find it in the bible and yet will continue to keep Sunday as the Lord's day on the say-so of the Catholic church

Proof that this view has been around ... for a while.


1946

In the Convert's Catechism of Catholic Doctrine, we read:

Q. Which is the Sabbath day?
A. Saturday is the Sabbath day.
Q. Why do we observe Sunday instead of Saturday?
A. We observe Sunday instead of Saturday because the Catholic Church, in the Council of Laodicea, (AD 336) transferred the solemnity from Saturday to Sunday….
Q. Why did the Catholic Church substitute Sunday for Saturday?
A. The Church substituted Sunday for Saturday, because Christ rose from the dead on a Sunday, and the Holy Ghost descended upon the Apostles on a Sunday.
Q. By what authority did the Church substitute Sunday for Saturday?
A. The Church substituted Sunday for Saturday by the plenitude of that divine power which Jesus Christ bestowed upon her!
—Rev. Peter Geiermann, C.SS.R., (1946), p. 50.


1566

In the Catechism of the Council of Trent,

The Church of God has thought it well to transfer the celebration and observance of the Sabbath to Sunday!
p 402, second revised edition (English), 1937. (First published in 1566)


1530 A non-Catholic source

the Augsburg Confession,

They [the Catholics] allege the Sabbath changed into Sunday, the Lord's day, contrary to the decalogue, as it appears; neither is there any example more boasted of than the changing of the Sabbath day. Great, they say, is the power and authority of the church, since it dispensed with one of the ten commandments.
Art. 28.​

 

[BobRyan]

Dies Domini

From the Sabbath to Sunday

18. Because the Third (the Sabbath) Commandment depends upon the remembrance of God's saving works and because Christians saw the definitive time inaugurated by Christ as a new beginning, they made the first day after the Sabbath a festive day, for that was the day on which the Lord rose from the dead. The Paschal Mystery of Christ is the full revelation of the mystery of the world's origin, the climax of the history of salvation and the anticipation of the eschatological fulfilment of the world. What God accomplished in Creation and wrought for his People in the Exodus has found its fullest expression in Christ's Death and Resurrection, though its definitive fulfilment will not come until the Parousia, when Christ returns in glory. In him, the "spiritual" meaning of the Sabbath is fully realized, as Saint Gregory the Great declares: "For us, the true Sabbath is the person of our Redeemer, our Lord Jesus Christ".(14) This is why the joy with which God, on humanity's first Sabbath, contemplates all that was created from nothing, is now expressed in the joy with which Christ, on Easter Sunday, appeared to his disciples, bringing the gift of peace and the gift of the Spirit (cf. Jn 20:19-23). It was in the Paschal Mystery that humanity, and with it the whole creation, "groaning in birth-pangs until now" (Rom 8:22), came to know its new "exodus" into the freedom of God's children who can cry out with Christ, "Abba, Father!" (Rom 8:15; Gal 4:6). In the light of this mystery, the meaning of the Old Testament precept concerning the Lord's Day is recovered, perfected and fully revealed in the glory which shines on the face of the Risen Christ (cf. 2 Cor 4:6). We move from the "Sabbath" to the "first day after the Sabbath", from the seventh day to the first day: the dies Domini becomes the dies Christi!

 

[BukiRob]

So long as we understand that although the Catholic Church changed the SOLEMNITY from Saturday to Sunday, we didn't change the Sabbath from Saturday to Sunday. We switched our worship from Sabbath to the Lord's Day. If you look up Sabbath in the Catholic Encyclopedia, it will still say it goes from Friday sundown until Saturday sundown.

The churches own words are in conflict with what you say.
"The Pope has the power to change times, to abrogate laws, and to dispense with all things, even the precepts of Christ." "The Pope has the authority and often exercised it, to dispense with the command of Christ." -Decretal, de Tranlatic Episcop. Cap. (The Pope can modify divine law.) Ferraris' Ecclesiastical Dictionary.

“Most Christians assume that Sunday is the biblically approved day of worship. The Catholic Church protests that it transferred Christian worship from the biblical Sabbath (Saturday) to Sunday, and that to try to argue that the change was made in the Bible is both dishonest and a denial of Catholic authority. If Protestantism wants to base its teachings only on the Bible, it should worship on Saturday.” Rome’s Challenge www.immaculateheart.com/maryonline Dec 2003

“Is not every Christian obliged to sanctify Sunday and to abstain on that day from unnecessary servile work? Is not the observance of this law among the most prominent of our sacred duties? But you may read the Bible from Genesis to Revelation, and you will not find a single line authorizing the sanctification of Sunday. The Scriptures enforce the religious observance of Saturday, a day which we never sanctify.” James Cardinal Gibbons, The Faith of Our Fathers (1917 edition), p. 72-73 (16th Edition, p 111; 88th Edition, p. 89).

“For example, nowhere in the Bible do we find that Christ or the Apostles ordered that the Sabbath be changed from Saturday to Sunday. We have the commandment of God given to Moses to keep holy the Sabbath day, that is the 7th day of the week, Saturday. Today most Christians keep Sunday because it has been revealed to us by the [Roman Catholic] church outside the Bible.” Catholic Virginian, October 3, 1947, p. 9, article “To Tell You the Truth.”

The (Catholic) Church, on the other hand, after changing the day of rest from the Jewish Sabbath, or seventh day of the week, to the first, made the Third Commandment refer to Sunday as the day to be kept holy as the Lord’s Day...He (God) claims one day out of the seven as a memorial to Himself, and this must be kept holy...”The Catholic Encyclopaedia, vol. 4, “The Ten Commandments”, 1908 edition by Robert Appleton Company; and 1999 Online edition by Kevin Knight, Imprimatur, John M. Farley, Archbishop of New York.

“Perhaps the boldest thing, the most revolutionary change the Church ever did, happened in the first century. The holy day, the Sabbath, was changed from Saturday to Sunday. ‘The day of the Lord’ was chosen, not from any direction noted in the Scriptures, but from the (Catholic) Church’s sense of its own power...People who think that the Scriptures should be the sole authority, should logically become 7th Day Adventists, and keep Saturday holy.” St. Catherine Church Sentinel, Algonac, Michigan, May 21, 1995.

“Nowhere in the Bible is it stated that worship should be changed from Saturday to Sunday...Now the Church...instituted, by God’s authority, Sunday as the day of worship. This same Church, by the same divine authority, taught the doctrine of Purgatory long before the Bible was made. We have, therefore, the same authority for Purgatory as we have for Sunday.” Martin J. Scott, Things Catholics Are Asked About, 1927 edition, p. 136.

“Question - Why do we observe Sunday instead of Saturday?
“Answer - We observe Sunday instead of Saturday because the Catholic Church, in the Council of Laodicea (A.D. 364), transferred the solemnity from Saturday to Sunday.” Peter Geiermann, C.S.S.R., The Convert’s Catechism of Catholic Doctrine, p. 50, 3rd edition, 1957.

“Some theologians have held that God likewise directly determined the Sunday as the day of worship in the New Law, that He Himself has explicitly substituted the Sunday for the Sabbath. But this theory is now entirely abandoned. It is now commonly held that God simply gave His Church the power to set aside whatever day or days she would deem suitable as Holy Days. The (Roman Catholic) Church chose Sunday, the first day of the week, and in the course of time added other days as holy days.” John Laux, A Course in Religion for Catholic High Schools and Academies, 1936 edition, vol. 1, p. 51.

“The Catholic church for over one thousand years before the existence of a Protestant, by virtue of her divine mission, changed the day from Saturday to Sunday...The Protestant World at its birth found the Christian Sabbath too strongly entrenched to run counter to its existence; it was therefore placed under the necessity of acquiescing in the arrangement, thus implying the (Catholic) Church’s right to change the day, for over three hundred years. The Christian Sabbath is therefore to this day, the acknowledged offspring of the Catholic Church as spouse of the Holy Ghost, without a word of remonstrance from the Protestant World.” James Cardinal Gibbons in the Catholic Mirror, September 23, 1983.

“It was the Catholic church which...has transferred this rest to Sunday in remembrance of the resurrection of our Lord. Therefore the observance of Sunday by the Protestants is an homage they pay, in spite of themselves, to the authority of the (Catholic) church.” Monsignor Louis Segur, Plain Talk About the Protestantism of Today, p. 213.

This is but a few of the very many comments on how the RCC church changed Sabbath to Sunday under its "own authority" These are comments from church leaders not outside commentaries

 

[Meowzltov]

The text says "changing the Lord's day from Saturday" admitting that this is the day as given in the Bible. In my initial statements I was merely trying to make that same point - that the Bible has the Lord's Day on Saturday.

There is no reason to think that the Bible has the Lord's Day on Shabbat. According to Act 20:7 the Church was already meeting on the first day of the week for the Lord's Supper.

 

[Meowzltov]

The churches own words are in conflict with what you say.

No they are not. Go back and read what I said again. Pay close attention to the word solemnity.

 

[BukiRob]

No they are not. Go back and read what I said again. Pay close attention to the word solemnity.

Im not playing this word game with you. The RCC set aside Sabbath for Sunday. I didn't even post ALL of the quotes from church leaders that make this point unmistakably clear. Her daughters (the rest of the gentile protestant church) persist in this very same error

 

[Meowzltov]

Im not playing this word game with you. The RCC set aside Sabbath for Sunday. I didn't even post ALL of the quotes from church leaders that make this point unmistakably clear. Her daughters (the rest of the gentile protestant church) persist in this very same error

You are incorrect, and unwilling to read carefully the nuances of what exactly went on. Catholics do not worship on the Sabbath. We worship on the Lord's Day, which is not the Sabbath.

 

[BukiRob]

You are incorrect, and unwilling to read carefully the nuances of what exactly went on. Catholics do not worship on the Sabbath. We worship on the Lord's Day, which is not the Sabbath.

I am not incorrect, you dont read what is written, you deny the very words of the catholic church itself.

The RCC forbade the observance of Sabbath and exchanged it for Sunday and repackaged it as "the lords day"

No where did I say that Catholics worship on Sabbath I have NO idea why you seem to think that I stated anything of that kind.

The worship on any day of the week is not the issue. The issue is that the RCC and her daughters teach that Sabbath is to be ignored.

 

[Meowzltov]

The RCC forbade the observance of Sabbath and exchanged it for Sunday and repackaged it as "the lords day"

Which is not the same thing as saying that Sunday is the Sabbath. Sheesh.

BTW the that forbidding of observing the Sabbath was never dogma, which is why it could be reversed. Hebrew Catholics often observe the Sabbath. I certainly do, and with Rome's blessing.

 

[BobRyan]

There is no reason to think that the Bible has the Lord's Day on Shabbat. According to Act 20:7 the Church was already meeting on the first day of the week for the Lord's Supper.

Ok so you and John Paul II differ on that point. No problem everyone has free will and can choose for themselves.

=================================================
QUOTE="BobRyan, post: 68315037, member: 235244"]Dies Domini

From the Sabbath to Sunday

18. Because the Third (the Sabbath) Commandment depends upon the remembrance of God's saving works and because Christians saw the definitive time inaugurated by Christ as a new beginning, they made the first day after the Sabbath a festive day, for that was the day on which the Lord rose from the dead. The Paschal Mystery of Christ is the full revelation of the mystery of the world's origin, the climax of the history of salvation and the anticipation of the eschatological fulfilment of the world. What God accomplished in Creation and wrought for his People in the Exodus has found its fullest expression in Christ's Death and Resurrection, though its definitive fulfilment will not come until the Parousia, when Christ returns in glory. In him, the "spiritual" meaning of the Sabbath is fully realized, as Saint Gregory the Great declares: "For us, the true Sabbath is the person of our Redeemer, our Lord Jesus Christ".(14) This is why the joy with which God, on humanity's first Sabbath, contemplates all that was created from nothing, is now expressed in the joy with which Christ, on Easter Sunday, appeared to his disciples, bringing the gift of peace and the gift of the Spirit (cf. Jn 20:19-23). It was in the Paschal Mystery that humanity, and with it the whole creation, "groaning in birth-pangs until now" (Rom 8:22), came to know its new "exodus" into the freedom of God's children who can cry out with Christ, "Abba, Father!" (Rom 8:15; Gal 4:6). In the light of this mystery, the meaning of the Old Testament precept concerning the Lord's Day is recovered, perfected and fully revealed in the glory which shines on the face of the Risen Christ (cf. 2 Cor 4:6). We move from the "Sabbath" to the "first day after the Sabbath", from the seventh day to the first day: the dies Domini becomes the dies Christi![/QUOTE]

=================================== end quote

And it could not noted that you and a number of other well documented RCC sources -- also differ on that point.

QUOTE="BobRyan, post: 68314978, member: 235244"]QUOTE="BobRyan, post: 67333148, member: 235244"]

...commentary on the Baltimore Catechism -

1965 -- first published 1959

(from "The Faith Explained" page 243

"we know that in the O.T it was the seventh day of the week - the Sabbath day- which was observed as the Lord's day. that was the law as God gave it...'remember to keep holy the Sabbath day.. the early Christian church determined as the Lord's day the first day of the week. That the church had the right to make such a law is evident...

The reason for changing the Lord's day from Saturday to Sunday lies in the fact that to the Christian church the first day of the week had been made double holy...

nothing is said in the bible about the change of the Lord's day from Saturday to Sunday..that is why we find so illogical the attitude of many non-Catholic who say they will believe nothing unless they can find it in the bible and yet will continue to keep Sunday as the Lord's day on the say-so of the Catholic church

Proof that this view has been around ... for a while.


1946

In the Convert's Catechism of Catholic Doctrine, we read:

Q. Which is the Sabbath day?
A. Saturday is the Sabbath day.
Q. Why do we observe Sunday instead of Saturday?
A. We observe Sunday instead of Saturday because the Catholic Church, in the Council of Laodicea, (AD 336) transferred the solemnity from Saturday to Sunday….
Q. Why did the Catholic Church substitute Sunday for Saturday?
A. The Church substituted Sunday for Saturday, because Christ rose from the dead on a Sunday, and the Holy Ghost descended upon the Apostles on a Sunday.
Q. By what authority did the Church substitute Sunday for Saturday?
A. The Church substituted Sunday for Saturday by the plenitude of that divine power which Jesus Christ bestowed upon her!
—Rev. Peter Geiermann, C.SS.R., (1946), p. 50.


1566

In the Catechism of the Council of Trent,

The Church of God has thought it well to transfer the celebration and observance of the Sabbath to Sunday!
p 402, second revised edition (English), 1937. (First published in 1566)
​

[/QUOTE]

=================

I happen to think they are right about the Bible Sabbath being the Lord's Day as given in the Bible - but you are free to differ.

in Christ,

Bob

 

[Meowzltov]

We move from the "Sabbath" to the "first day after the Sabbath", from the seventh day to the first day:

This is what I have been saying. It is different from saying the CC moved the Sabbath.

 

[BobRyan]

We move from the "Sabbath" to the "first day after the Sabbath", from the seventh day to the first day:

This is what I have been saying. It is different from saying the CC moved the Sabbath.

I agree - if that is all that had been said it could be argued that you are in complete agreement.

but in this case -

But in this case we see a very different set of details -- much harder to reconcile with your statements.
==============================

The reason for changing the Lord's day from Saturday to Sunday lies in the fact that to the Christian church the first day of the week had been made double holy...

nothing is said in the bible about the change of the Lord's day from Saturday to Sunday..that is why we find so illogical the attitude of many non-Catholic who say they will believe nothing unless they can find it in the bible and yet will continue to keep Sunday as the Lord's day on the say-so of the Catholic church

 

[Meowzltov]

We move from the "Sabbath" to the "first day after the Sabbath", from the seventh day to the first day:


I agree - if that is all that had been said it could be argued that you are in complete agreement.

but in this case -

But in this case we see a very different set of details -- much harder to reconcile with your statements.
==============================

The reason for changing the Lord's day from Saturday to Sunday lies in the fact that to the Christian church the first day of the week had been made double holy...

nothing is said in the bible about the change of the Lord's day from Saturday to Sunday..that is why we find so illogical the attitude of many non-Catholic who say they will believe nothing unless they can find it in the bible and yet will continue to keep Sunday as the Lord's day on the say-so of the Catholic church

There is only one thing I take issue with: The Lord's Day. Just as the Sabbath was always Saturday, the Lord's Day was always Sunday.

 

[BobRyan]

There is only one thing I take issue with: The Lord's Day. Just as the Sabbath was always Saturday, the Lord's Day was always Sunday.

That is a common view - but interestingly - the RCC itself does not appear to take that view.

 

[Meowzltov]

That is a common view - but interestingly - the RCC itself does not appear to take that view.

The early Christian writers also bear witness to the observance of the Lord's Day (Sunday) over the Hebrew Sabbath (Saturday). http://www.catholicnewsagency.com/resources/apologetics/catholic-doctrines-and-practices/the-sabbath-or-the-lords-day/

However, passages of Scripture such as Acts 20:7, 1 Corinthians 16:2, Colossians 2:16-17, and Revelation 1:10 indicate that, even during New Testament times, the Sabbath is no longer binding and that Christians are to worship on the Lord’s day, Sunday, instead. http://www.catholic.com/tracts/sabbath-or-sunday

Catechism: 2177 The Sunday celebration of the Lord's Day and his Eucharist is at the heart of the Church's life. "Sunday is the day on which the paschal mystery is celebrated in light of the apostolic tradition and is to be observed as the foremost holy day of obligation in the universal Church." http://www.vatican.va/archive/ccc_css/archive/catechism/p3s2c1a3.htm

Catholics do not worship on the Sabbath, which according to Jewish law is the last day of the week (Saturday), when God rested from all the work he had done in creation (Gen. 2:2-3). Catholics worship on the Lord’s Day, the first day of the week (Sunday, the eighth day); the day when God said "Let there be light" (Gen. 1:3); the day when Christ rose from the dead; the day when the Holy Spirit came upon the Apostles (Day of Pentecost). The Catechism of the Catholic Church says: "The Church celebrates the day of Christ’s Resurrection on the ‘eighth day,’ Sunday, which is rightly called the Lord’s Day" (CCC 2191). The early Church did not move the Sabbath from Saturday to Sunday. Instead "The Sabbath, which represented the completion of the first creation, has been replaced by Sunday, which recalls the new creation inaugurated by the Resurrection of Christ" (CCC 2190). Sunday is the day Catholics are bound to keep, not Saturday. http://www.catholic.com/quickquestions/did-the-early-church-move-the-sabbath-from-saturday-to-sunday

In the Western Catholic Church, Sunday is kept in commemoration of the resurrection of Christ and celebrated with the Eucharist (Catholic Catechism 2177).[32] It is also the day of rest. Lord's Day is considered both the first day and "the eighth day" of the seven-day week, symbolizing both first creation and new creation (2174).[32] Roman Catholics view the first day as a day for assembly for worship (2178, Heb. 10:25) https://en.wikipedia.org/wiki/Sabbath_in_Christianity#Roman_Catholicism

 

[SAAN]

There is no reason to think that the Bible has the Lord's Day on Shabbat. According to Act 20:7 the Church was already meeting on the first day of the week for the Lord's Supper.

I think alot of people have Acts 20:7 out of context. Jesus was not instituting a replacement for Passover and outside of Acts 20:7, there is no where else in the NT in which there purpose was to meet on the 1st day of the week to break bread, that was just one instance of them meeting together.