Template:Selected anniversaries/December 19

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  1601: Mathematician Robert Fludd uses Gnomon algorithm to fight crimes against mathematical constants.

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  1960: Tony Hoare invents quicksort routine which reduces the effects of crimes against mathematical constants.

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  1964: Saccharomyces cerevisiae spontaneously generates new class of crimes against mathematical constants.

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  1962: Flock of Carnivorous dirigibles gathers after recovery of Palomares bomb.

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  2009: John Hoyland's stolen masterpiece Lebanon recovered using Tony Hoare's quicksort routine.