Oh look, it’s Pi Day.
Have you heard, then, of Tau Day?
“The true circle constant is the ratio of a circle’s circumference to its radius, not to its diameter. This number, called τ (tau, is equal to 2π, so π is 1/2τ—and March 14 is thus Half Tau Day. (Of course, June 28, or 6/28, is Tau Day itself.) Although it is of great historical importance, the mathematical significance of π is simply that it is one-half τ.”
http://www.math.utah.edu/~palais/pi.pdf
Interesting notion. Canadian news websites: reporting the slightly quirky version of Pi Day for all of us to enjoy.
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