Speaking of pizza, there's a lot of Pizza parlors around the country with 'Pi Day' specials including Pizza Hut, Round Table Pizza, Papa Murphy's as well as a few others.

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Also speaking of 'Pi', here's a video where a math instructor in London, and his students, calculated, by hand, 'Pi' to a record number of digits, 528, a record which had stood since 1870:

And 'Pi day' is always followed by the 'Ides of March'.

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Even in engineering school, 3.14159 was good enough since the next digit was a '2', which meant any rounding would not have changed the '9'.

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