From the beginning of the world to the resurrection of Christ, God appointed the seventh day of the week to be the weekly Sabbath; and the first day of the week, ever since, to continue to the end of the world, which is the Christian Sabbath.
Scripture proofs: Gen. 2:2-3; 1 Cor. 16:1-2; Acts 20:7.
Source: The Constitution of the Reformed Presbyterian Church of North America, updated 2026, C-8.