First Century Christianity NEVER kept the Sabbath. NEVER. Not once do the Apostles tell the Christians they must keep the Sabbath, or any of the other 613 Commandments of Judaism. Sabbath Keeping has never been a part of genuine Christianity. Only quasi-Christian cults emphasize it.
Under Jewish law, circumcision is required before ANY of the Mosaic Laws can be kept. The Council of Jerusalem in AD 50 decided once and for all that the Gentile Christians would not be required to follow the Mosaic Law. Their duties were described in the Book of Acts and are parallel to the Noahide Law.
Seventh Day Adventism has a yearly stampede of 300,000 fleeing their cruel system of cult bondage. EVERY single significant doctrine of SDA has been soundly debunked by their own theologians! Not one of them has held up under scrutiny of their own Bible scholars! It is a cultish house of cards.
SDAs THINK they are keeping the Sabbath and brag loudly about their superiority over other Christians because of it, but in truth they do not keep the Sabbath. What they "keep" is a convenient, Americanized, sanitized, dumbed down, processed cheese-version of the Sabbath that bears absolutely NO resemblance to the Sabbath as kept by Jesus or anyone in the Old Testament.
Don't flatter yourself for imagining you have accomplished something you haven't. The only truly honest Sabbath Keepers are the ones who recently began also keeping the monthly, yearly and New Moons Sabbaths, all the Jewish feast days and some of them have built the necessary backyard temples to commence animal sacrifices, following the lead of Jesus who participated in both animal sacrifices and paid the Temple taxes The honest Sabbath keepers have searched out and find the Rabbis necessary to follow the Levitical food laws. If you are going to follow Jesus's example of Sabbath keeping and his perfect record on ALL of the Jewish laws, then you also have to follow all the other Mosaic Laws outlined above.
Just do not pretend this is Christianity. Because it isn't.
In the aftermath of SDA's Sabbath Scholar Dr. Samuelle Bachiochi's demolition of the culture that had developed over 150 years around SDA's version of the Sabbath, honest Adventists have followed his lead and are undertaking the necessary steps to follow ALL of the Jewish laws that are required. Furthermore, they have seen the necessity of rejectubg St. Paul as a "False Prophet" and someone who they claim
"illegitimately introduced Greek and Roman thought into Christianity." Notice how advocates of the Sabbatarian cult NEVER cite St. Paul for support for their system of cult bondage.
Big Red is on another thread on this subject honest about the tacit need for rejecting St. Paul and his Epistles and Luke when he wrote: "The answer will reveal that Paul and Luke had an anti-law agenda." Judaizers have consistently attacked St. Paul for that very reason, from the beginning of Christianity. Big Red at the very least has demonstrated that Sabbath Keeping and all of the other Mosaic Laws are incompatible with the Christian theology as given to us by the Apostle Paul.
The Judaizers that rejected St. Paul and his message of Christian freedom in Christ gradually degenerated into the Marcionite cult that over time simply became irrelevant to Christianity. Whereas the Gentile Christian community thrived and grew like wildfire.
Christianity has NEVER required Sabbath keeping.