There is no such thing as a denomination in the Bible. Now many Churches have done incredibly good things for the world where they have stuck to the truth of the Word and followed its principles, but the truth is that we are never told to go to a Church. If you find one that is a blessing to you, great, but you are not commanded to go there. The word "Church" is simply a Greek word translated from "ecclesia" which means a gathering of believers any time and anywhere. The Church is the body of believers, the body of Messiah.
You might want to search the Bible to see what it says on how to keep the Sabbath. First, we are told that the Almighty says He "will not alter" what goes out of His mouth. He audibly spoke the 10 Commandments to the ears of the terrified Israelites below Mt. Sinai and this included a Fri. nightfall to Sat. nightfall Sabbath. The 4th Commandment, the Sabbath Commandment, is the longest of the 10 and is stated as being the very sign of the Covenant between the Lord and His people. Other religions speak out against theft, murder and so on. Only in the 10 Commandments do we see a command to rest one day a week. We are told to congregate on the Sabbath, but not told to do so on Sundays or in a big building with a cross on top. Yes, we can worship on any day of the week, but we are not to work on the Sabbath.
(Some say "Paul said.... Paul said.... " about the Sabbath and holy days. First, Paul had no authority whatsoever to change what was spoken by the Father and written with His very finger and he himself said not to follow him but the Savior, Who certainly never said the Sabbath would change. 2nd, Paul never even said the Sabbath was changed to Sunday. His "Let no man judge you" speech was directed to newly converted pagans about avoiding peer pressure in keeping the holy days of the Scriptures.)
Now, the 4th Commandment says to not work on the Sabbath, to have no servants work, not to even have any animals work, not to cook on that day. All denominations that I know of, even if they think the Sabbath is Sunday, pretty much ignore all that. (Some SDAers do pay attention, but not all.) They feel they have done their duty on Sundays when they go to Church. Then they go out and shop or eat in restaurants where others have to serve them. Though we are told, in Isaiah, that we are to keep the day holy unto the Lord, they often watch Netflix or engage in other forms of worldly entertainment.
I would say not to seek out what denominations say, but what the Bible really says about the Sabbath and when and how to keep it. For me it was helpful to search out first century historians to see what the early believers were really doing on the Sabbath. They all agree, secular, Protestant and Catholic.
