In terms of "Judgment Day" -- there have been numerous predictions in the past that have not come true. Back in May, news channels focused on "May 21st" as the date for the end of the world (see http://www.csmonitor.com/Science/2011/0518/Judgment-Day-May-21-When-will-the-world-actually-end). Other failed predictions include October 22, 1844; 1806; December 21, 1954; 2000; October and November 1982 (http://www.csmonitor.com/Science/2011/0518/Judgment-Day-Five-failed-end-of-the-world-predictions/October-22-1844).
Many have also been waiting for the world to end in 2012 (see: http://abcnews.go.com/International/story?id=5301284&page=1) -- as attributed to Nostradamus (http://www.december2012endofworld.com/nostradamus-2012). We still have over a year to observe whether this will happen, or whether something will happen sooner or later. At this point, that's the best answer we can offer -- the world will end... sooner or later.