The Lord’s Day
Revelation 1:10 reveals that John received the vision of Revelation on “the Lord’s day.” The Bible only identifies Sabbath as the “Lord’s day.” In Isaiah 58:13 God claims the Sabbath as “my holy day,” and Jesus repeated this claim when He said, “Therefore the Son of man is Lord also of the sabbath” (Mark 2:28). According to the Bible, therefore, John received the visions of Revelation on the Sabbath! In contrast, the earliest unequivocal reference to the “Lord’s Day” as Sunday appears in the second century apocryphal Gospel According to Peter, where the day of Christ’s resurrection is termed the “Lord’s day.”