Without knowing the history of made-up holidays, I can almost guarantee it was someone in America who declared March 14 (3/14) as Pi Day... and ultimately Pie Day!
What is Pi for real? Pi (often represented by the lower-case Greek letter π), one of the most well-known mathematical constants, is the ratio of a circle’s circumference to its diameter. For any circle, the distance around the edge is a little more than three times the distance across. Typing π into a calculator and pressing ENTER will yield the result 3.141592654, not because this value is exact, but because a calculator’s display is often limited to 10 digits. Pi is actually an irrational number (a decimal with no end and no repeating pattern) that is most often approximated with the decimal 3.14.
Also the date March 14.
I saw a funny today (mocking Hallmark and other greeting card companies) that said Pi Day was a holiday made-up by mathematicians so they could sell more math!
That's good.
But all the talk at work was the PIE version of Pi Day.
So someone went down the street to Perkins and suddenly we were observing the holiday like true mathematicians.
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