On March 12, 2009, the United States House of Representatives passed a resolution recognizing March 14, 2009 as the first National Pi Day.
“Pi appears to be woven into the very fabric of the Universe, popping up every time you look deeper into mathematics and physics.” Phil Plait
You may remember from high school geometry that Pi, 3.14 has to do with finding the circumference of a circle. Really, who could forget the formula πr² (Pi r2). March 14, or 3/14, represents the first 3 numbers of Pi when represented in decimal form.
You may have thought (if you even knew about it) that 2014’s celebration of the entire month of March as Pi Month was special. But 2015’s celebration is particularly unique. It is the only day this century that the date is Pi to four decimal places, 3.1415.
And, even more extraordinary, at precisely 9:26:53 (a.m. and p.m.) both the date and the time become Pi to nine decimal places 3.141592653. 😉
Celebrating Pi Day
Some people will spend Pi Day honoring the physicist Albert Einstein, born on March 14. Others participate in an Einstein look-a-like competition at Princeton University, where Einstein had an office for many years.
And on Saturday’s ultimate Pi Day, I imagine a great many more people will spend a part of the day making and/or eating pie.
Though, without knowing it, in all my years of making pies and tarts savory and sweet, I was celebrating Pi(e) Day almost every day of the year.
A few recipes for pies and tarts in Celebration of Pi Day.
- Perfectly Delicious Maple Pumpkin Pie
- Cranberry Apple Crostata
- Honey Apple Tarte Tatin
- Phyllo Tartlets with Lemon Curd and Berries