The Only Sabbath of the Bible is God's
The word “Sabbath” means rest. It is the untranslated Hebrew word signifying rest. So where we read, “The seventh day is the Sabbath of the Lord thy God,” it is the same as though it read, “The seventh day is the rest of the Lord thy God.” That this is so will be plain to any one who recalls the statement that on the seventh day God rested from all His works which He had made.