In the book of Acts, there are 8 different references to the seventh day as being the Sabbath, and what the apostles did on that day (13:14, 27, 42, 44, 15:21, 16:13, 17:2 and 18:4). The church and its first day meeting had already been well established by the apostles.
Now, why, if Sunday were the "Christian" or "New Testament" Sabbath, does THE BIBLE ITSELF still recognize the seventh day as the Sabbath after the Sabbath had already supposedly changed to Sunday?
This is a question that Sabbatarians have never given a reasonable answer to for me. Does anybody have any additional observations on the Sabbath question?