What is the significance of Aug. 22?

FRC.org reports:

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.