And I beheld when he had opened the sixth seal, and, lo, there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became as blood;
All Commentaries on Revelation 6:12 Go To Revelation 6
Bede
AD 735
sixth: By the opening of the sixth seal the last persecution is announced, and that the world is shaken with darkness and fear, as when the Lord was crucified on the sixth day of the week.