Some Christians ask, “Should we keep Saturday or Sunday?” When studying the Bible about this—and any other subject—there are three things to keep in mind: who is speaking, who is being spoken to, and what is being spoken about. Applying this approach, Dr. Halff answers these questions: Which day is the Sabbath? When and to whom was the Sabbath given? What is the penalty for breaking the Sabbath? Is the Sabbath still in effect today?