If the worst-case Y2K predictions had come true, the technology apocalypse would have hit at midnight on Jan. 1, 2000, plunging the world into a new dark age.
The global banking system would have collapsed, medical devices would have stopped working, planes would have fallen out of the sky, nuclear reactors would have melted down and egg timers would have turned into tiny bombs, all because of one fatal design flaw in calendar-based human technologies around the globe.