Happy Pi Day!

March 14 is celebrated as Pi Day because the date, 3/14, is the first three digits of pi, the ratio of a circle's circumference to it diameters. Of course, the number is not "round" at all, and the digits go on to infinity. In that long sequence of numbers, you'll eventually find any other sequence of numbers, like your birthday. Time made a handy calculator to find where your birth date falls in the pi sequence.

 

Happy Pi Day!

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This year's Pi Day is even more special than you know

Today is the most magical day of the year: Pi Day.
 It's also the most magical year of the century: Pi Year.
 That is, today's date is 3/14/15 (at least in the US and a few other countries that write dates the same way), which matches up nicely with the first five digits of pi, the ratio of every circle's circumference to its diameter: 3.1415.

  But it doesn't stop there.