What is the significance of Aug. 22?

Bernard Lewis’s Editorial in the Wall Street Journal (excerpted below) started the Aug. 22nd buzz.

Update- And just in-time for Aug. 22
  TEHRAN, Aug. 17 (Xinhua) — The Iranian army said on Thursday that it would launch a large-scale military exercise soon, the state television reported.
And here is another commentary

In Islam, as in Judaism and Christianity, there are certain beliefs concerning the cosmic struggle at the end of time—Gog and Magog, anti-Christ, Armageddon, and for Shiite Muslims, the long awaited return of the Hidden Imam, ending in the final victory of the forces of good over evil, however these may be defined. Mr. Ahmadinejad and his followers clearly believe that this time is now, and that the terminal struggle has already begun and is indeed well advanced. It may even have a date, indicated by several references by the Iranian president to giving his final answer to the U.S. about nuclear development by Aug. 22. This was at first reported as “by the end of August,” but Mr. Ahmadinejad’s statement was more precise.

What is the significance of Aug. 22? This year, Aug. 22 corresponds, in the Islamic calendar, to the 27th day of the month of Rajab of the year 1427. This, by tradition, is the night when many Muslims commemorate the night flight of the prophet Muhammad on the winged horse Buraq, first to “the farthest mosque,” usually identified with Jerusalem, and then to heaven and back (c.f., Koran XVII.1). This might well be deemed an appropriate date for the apocalyptic ending of Israel and if necessary of the world. It is far from certain that Mr. Ahmadinejad plans any such cataclysmic events precisely for Aug. 22. But it would be wise to bear the possibility in mind.

A passage from the Ayatollah Khomeini, quoted in an 11th-grade Iranian schoolbook, is revealing. “I am decisively announcing to the whole world that if the world-devourers [i.e., the infidel powers] wish to stand against our religion, we will stand against their whole world and will not cease until the annihilation of all them. Either we all become free, or we will go to the greater freedom which is martyrdom. Either we shake one another’s hands in joy at the victory of Islam in the world, or all of us will turn to eternal life and martyrdom. In both cases, victory and success are ours.”

In this context, mutual assured destruction, the deterrent that worked so well during the Cold War, would have no meaning. At the end of time, there will be general destruction anyway. What will matter will be the final destination of the dead—hell for the infidels, and heaven for the believers. For people with this mindset, MAD is not a constraint; it is an inducement.