Happy Pi Day!

It’s March 14 and I’m sure you know what that means. It’s Pi Day!

If you weren’t aware of this wonderful holiday, you’re really missing out. Today, 3/14, celebrates the number π. This wonderful number is an important one to know in math. It’s equal to the ratio of a circle’s circumference to its diameter, which always equals 3.141592…

One of the fun parts is that π is an irrational number, meaning that it has an infinite number of digits after the decimal place because it’s not an even fraction .Usually in practice we just abbreviate it to 3.14 or so. But yesterday π was taken to new heights in Austin.


Yesterday, 5 planes from a Florida skywriting company took to the skies to make sure everyone at SXSW knew exactly what today is. Flying in tandem, they circled overhead, writing hundreds of π — one at a time — in puffs of smoke. It was quite a sight to see. Even their start time, 6:28, had significance. 6.28 is two times 3.14.


After nearly 90 minutes, they ended with a hashtag, #piinthesky. These photos are circulating on news outlets (they’re better than the ones I took), but this was visible even from my office in North Austin.

I hope you have plans to celebrate Pi Day today and revel in the magic of math, preferably with some pie!


4 thoughts on “Happy Pi Day!

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