Many saints have spoken of a three days of darkness that will come as a great chastisement to the world due to man’s pride and self-love, manifested in a great number of sins committed against God and neighbor throughout the entire world.
“After the three days of darkness, St. Peter and St. Paul, having come down from Heaven, will preach in the whole world and designate a new Pope. A great light will flash from their bodies and will settle upon the cardinal who is to become Pope. Christianity, then, will spread throughout the world. He is the Holy Pontiff, chosen by God to withstand the storm. At the end, he will have the gift of miracles, and his name shall be praised over the whole earth. Whole nations will come back to the Church and the face of the earth will be renewed. Russia, England, and China will come into the Church.” (Prophecy of Blessed Anna Maria Taigi [1769-1837 A.D.] who was Beatified by Bendedict XV in 1920.)
Click below for a movie that describes this terrible event and how the modern world is very offensive to God: