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Which day of the seven has God appointed to be the weekly Sabbath?
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
Genesis 2:2-3
And on the seventh day God ended his work which he had made; and he rested on the seventh day.
John 20:19
Then the same day at evening, being the first day of the week, when the doors were shut where the disciples were assembled.
Acts 20:7
And upon the first day of the week, when the disciples came together to break bread.
1 Corinthians 16:2
Upon the first day of the week let every one of you lay by him in store.