The 7th Day Adventists Salvific day, meaning Saturday is the Sabbath a
holy day. This sort of doctrine happens when people do not divide the
Bible with dispensations.
  The doctrine of the Church is found from Romans to Philemon.
We are in the dispensation of the Church. The other books of the Bible
were written to the Jews under the dispensation of the Law. There
were, are, and will be seven dispensations.
    So, No, Christians are not allowed/ required to do the Law of
Moses as in keeping Saturday as a Holy Day, or blood sacrifices, or
tithing, or stoning someone to death for various crimes.
   You are certainly not allowed to have the church elders stone
rebellious teenagers to death! >  The Apostle Paul makes all this
very clear.
Lewis Brackett