Pilgrim

Although I agree with you concerning Calvin's view of the Sabbath; I have found that the issue of Calvin's view of the Sabbath is debated in the Reformed community.
Theologians such as Richard Gaffin disagree strongly that Calvin held to the same understanding of the Sabbath that the WCF teaches. Gaffin and many others believe that the Puritans returned to Scholasticism and created the Lord’s Day as the Reformed Church knows it today.
Apparently Gaffin quotes Calvin (though I don’t have a reference) “"...we ought to observe this order of having some day of the week, whether one or two. But all of that can be left up to the liberty of Christians."

The previous Calvin quote was taken from the Institutes where Calvin offers his exposition of the “Moral Law”.
Many Reformed theologians also believe that the 4th Commandment was ceremonial, not moral.
It appears that Calvin isn’t as clear on this issue as I thought.

Tom