doomsdate
n. A future date that current computer software and hardware will interpret incorrectly, resulting in faulty logic or system failure.

Example Citation:
"Jan. 1, 2000, is The Big One, kids. By now, you've heard that many of the world's computers will roll the date clock forward from '99' to '00' with potentially disastrous consequences.... But that isn't the only computer 'doomsdate' looming. A slew of lesser-known dates also could wreak technological havoc."
—Steve Woodward, "Jan. 1, 2000, isn't only 'doomsdate'," Star Tribune (Minneapolis, MN)

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