# Happy Pi Day!

by Gene on Mar. 14th, 2008

Pi is the ratio of the circumference of a circle to its diameter, or roughly 3.14. It's one of the most important numbers in all of mathematics, popping up in all kinds of equations. It even has its own day: March 14 (3.14).

Pi is an irrational number. No, that doesn't mean it gets upset easily. Rather, it never ends and it never repeats. "3.14" is just rounded off. You could carry pi to a couple more places -- 3.1416 -- which would make "Pi Hour" 4:00 pm today (3/14 16:00 hours military time).

And, since Gene is never one to leave well enough alone, we can go further. Carry pi to seven places -- 3.1415926 -- and the exact moment of pi is 3:55 pm and 35.5 seconds (15.926 hours since midnight).

Extra bonus fun: One year is 365.2425 days. If you had a circle 365.2425 inches in circumference, it's diameter would be 116.26 inches across. Which would make Diameter Day the 117th day of the year. This being a leap year, that would be April 26 at 6:14:50 am. Set your alarm clocks now!

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