You must be a Catholic or not have read very much. I ran into this article today and BS. " The Catholic Church changed Saturday Sabbath to Sunday Sabbath. We are still obligated to the Law (Matthew 5:17-20). How do you resond to this biblically" I don’t have time now but i will. I can prove to you that you are wrong. Later
Asking a question by attacking and accusing is not a particularly "Christian" approach to discussing biblical questions. With that said, let me respond.
Many passages can be used to show that those in the New Covenant are not subject to the laws in the Old Covenant, but let me suggest a few.
First, there is Colossians 2:13-23. Here Paul says that the "Law" was nailed to the cross. This may not refer exclusively to the Law of Moses, but it includes this law. He is specific here in saying that no one should be judged with regard to a Sabbath or a New Moon festival. Therefore, no Christian should judge another with regard to Sabbaths. Jesus said in Matthew 5:17 that he came to fulfill the requirements of the Law, making it not necessary for us to do so. The entire message of Galatians is that enforcing Law, specifically the Law of Moses, on Christians is a false doctrine, liable to condemnation. The Hebrew writer makes it clear that the Old Covenant was "old, fading and about to disappear" (Hebrews 8:13).
The New Testament did not replace Saturday Sabbath with Sunday Sabbath. There is NO Sabbath in Christianity, except for our final Sabbath-rest in heaven according to Hebrews 4:1-11.
I am not a Catholic and I do a great variety of reading. I believe you should be more gracious in your approach to those with whom you do not agree.