I am reminded of St. John Bosco's cryptic remark in his prophecy of 1870: THE THREE PROPHECIES OF DON BOSCO (franciscan-archive.org) Iniquity is at an end, sin shall cease, and before two full moons shall have shone in the month of flowers, the rainbow of peace shall appear on the earth The above prophecy includes a reference to both the Great Monarch and Holy Pope (i.e. "But behold, a great warrior from the north appears, a banner in his right hand, his arm bearing this inscription: 'Irresistible is the hand of the Lord.' At that moment the Venerable Old Man of Rome went forward to meet him, wielding a flaming torch. The banner then grew larger and its blackness became white as snow; in its centre stood out the name of the Almighty in golden letters. The warrior and his followers bowed profoundly to the Venerable Old Man and joined hands with him.") It predicts a possible date for the dawn of the period of peace, based upon a "Blue Moon" phenomenon occurring in the month of May (?). According to this definition, the next Blue Moon (two full moons in a single month) to occur during the "month of flowers" (assuming it is May and not a different month) is May 2026: http://www.moongiant.com/moonphases/May/2026/ If we take the "month of flowers" to be March rather than May, however, the nearest would be March 2037. There are only a finite number of dates in which this particular conjunction of March/May and two full moons can happen in any given 100-year period. In January and March of 1999, we had a situation which only takes place about four times a century and is even rarer: two Blue Moons occurring in the same year. It will not happen again until January and March 2037. It is from this astronomical phenomenon that we derive the phrase, "once in a blue moon" incidentally. Here is a scientifically precise and complete list of all Blue Moons calculated to occur this century in the month of May. They amount to five: http://www.obliquity.com/cgi-bin/bluemoon.cgi May 2026 May 2045 May 2064 May 2072 May 2083 And in March they amount to three: March 2037 March 2056 March 2067 All things considered, March is the month where spring officially begins and I would say that some time in the late 2030s (2037-2038) seems our best chance of seeing this realized in all of our lifetimes (I'm 28 years old at the moment) and would align with the information detailed in the prophecies.