"The Fourth Commandment is very tricky. It seems like most Christians are either oblivious of the Sabbath and treat it like Saturday interrupted by church, or they advocate a strict sabbatarianism that tries hard to apply to Sunday the details of the law of Moses (minus the death penalty, of course). I prefer the simple approach laid out in the Heidelberg Catechism: Go to church on the 'festive day of rest' and cease from evil ways every day of the week." - Kevin DeYoung.The Good News We Almost Forgot. 179.

Question 103: What is God's will for you in the fourth commandment?

Answer: First, that the gospel ministry and education for it be maintained, and that, especially on the festive day of rest, I regularly attend the assembly of God's people to learn what God's Word teaches, to participate in the sacraments, to pray to God publicly, and to bring Christian offerings. Second, that every day of my life I rest from my evil ways, let the Lord work in me through His Spirit, and so begin already in the life the eternal Sabbath.