Answer: The Fourth Commandment requires of all men the sanctifying or keeping holy to God such set times as he has appointed in his Word, expressly one whole day in seven; which was the seventh from the beginning of the world to the resurrection of Christ, and the first day of the week ever since, and so to continue to the end of the world; which is the Christian sabbath₁, and in the New Testament called the Lord’s day.₂

1. Dt 5:12–14; Gen 2:2–3; 1 Cor 16:1–2; Acts 20:7; Mt 5:17–18; Isa 56:2, 4, 6–7;
2. Rev 1:10