In another thread Wolseley mentioned "Three days of darkness" Catholics.
Interesting search - here's the first hit:
The Three Days of Darkness
Exerpts from Yves Dupont (1922-1979 A.D.)
THE ACT OF GOD
The most spectacular aspect of the Act of God will be the three days of darkness over the whole earth. The Three Days have been announced by many mystics, viz., Bl. Anna-Maria Taigi, Padre Pio, Elizabeth Canori-Mora, Rosa-Colomba Asdente, Palma d'Oria, in Italy; Father Nectou, in Belgium; St. Hildegard, in Germany; Pere Lamy, Marie Baourdi, Marie Martel, Marie-Julie Jahenny, in France. (This list is not exhaustive; many more mystics have announced the Three Days.)
Later, on that web page:
...The Church does not oblige us to believe in any particular prophecy as a matter of faith [de fide], but we are indeed obliged to believe that prophecies may be made even in our own times, for this is in the Gospel [Evangelium]: the Holy Ghost will speak to many in the Latter Days.
Moreover, when an identical prophecy has been made by widely separated people in time and space, when this particular prophecy was accompanied by other predictions which have already come to pass, and when the holiness of the mystics in question has been recognized by the Church, we would be foolish indeed not to believe that the prophecy must come to pass. Such is the case concerning the Three Days of Darkness. How else could we explain that an illiterate peasant woman of Brittany is describing the very thing that another mystic in, say, Germany or Italy is also describing?
and then:
THE PROXIMATE SIGNS
Here are the proximate signs in their probable order of occurrence. This, to be sure, is only my own opinion, and I may be wrong for I am no prophet myself; but, after studying a large number of prophecies, this order appears to me to be the most likely:
1. Flouting of church laws, irreverence and immodesty in church, fall in attendance at church.
2. Lack of charity towards others, heartlessness, indifference, divisions, contentions, godlessness, pride in human knowledge.
3. Breakdown of family life: immorality, adultery, perversion of youth via the media (e.g. homosexuals giving lectures in schools), immodest fashions (e.g. mini-skirts, bikinis, see-throughs), people concerned only with eating, drinking, dancing and other pleasures.
4. Civil commotions, contempt for authority, downfall of governments, confusion in high places, corruption, coups d'etat, civil war, revolution. (The first four proximate signs have already come to pass, at least partly; for we are yet to see civil war and revolution in the West. But the sequence of events is not strictly chronological; there is room for some overlapping. Thus, the 5th proximate sign seems to have begun also.)
5. Floods and droughts, crop failures, unusual weather, tornadoes, earthquakes, tidal waves, famines, epidemics, unknown diseases (e.g. new strains of viruses).
THE WARNING
This will take place between the proximate and the immediate signs. It will be a supernatural occurrence.
During the Warning, everyone will be made aware of his/her own sinfulness, and many will wish to die, but the Warning itself will be completely harmless.
The Warning must be viewed as the last act of mercy from God, a final appeal to mankind to do penance before the three days of darkness and the destruction of three-quarters of the human race. At a time when the murder of unborn babies and the sin of Sodom and Lesbos have become respectable and sometimes legal, we should not wonder why God is going to punish mankind.
By that time, war and revolution will have already caused a high deathtoll, and Communism will be victorious, but all this will be as nothing compared with the deathtoll caused by the Three Days.
http://www.opusdeialert.com/3daysofdarkness.htm