On March 14 at 1:59 (3.14159), people all over the world eat pies, run circles, crash computers, and generally act irrationally—all in celebration of everyone’s favorite irrational number. Pi Day was born at San Francisco’s Exploratorium in 1988 but has since colonized the globe, recognized by both UNESCO and the US House of Representatives. Ubiquitous in equations, pi begat Pilish, a constrained language fun for writing poems and stories (“how I want a drink—alcoholic of course” uses the first nine digits); 3.14 is also, incidentally, Einstein’s birthday. I’m not the only person with a cat named Pi.
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