What is Three Days of Darkness?

The Three Days of Darkness is an eschatological prophecy of future events, held by some Catholics to be true. The prophecy foretells three days and nights of "an intense darkness" over the whole earth, against which the only light will come from blessed beeswax candles, and during which "all the enemies of the Church... will perish."

The prophecy parallels the Ten Plagues against Egypt in the Book of Exodus. The Apocalypse of John also mentions a plague of unnatural darkness as an effect of the sixth seal and fifth vial. However, the specifics of the "Three Days of Darkness" prophecy are derived from private revelation.