The Creation model should always guide us in knowing what God’s original intent for man was as far as certain institutions are concerned. To know the original intent of God for Marriage, Dieting, Work etc, we must always turn to the Garden of Eden to know how it was in that perfect unfallen world. This certainly applies to the Sabbath. The Creation model helps us to know the original day of Creation ie. The Seventh Day ,and the original intent of the Sabbath. ( see Genesis 2:1-3)