Question: what does the bible say about what day to worship?
Answer: Revelation: In 1:10, John the Beloved states that he was "in Spirit" in the "Lord's Day", a term apparently familiar to his readers, without mentioning Sabbath. First-day Sabbatarians hold that this means he was worshipping on Sunday, the day of Christ's resurrection (cf. Acts 20:7, 1 Cor.