In our ever-changing world, it’s nice to have something constant that we can point to, so I’m happy that March 14 is celebrated as National Pi Day.
Pi is the ratio of a circle’s circumference to its diameter, and it’s a constant. (It’s also an irrational number, but that’s another story.) It doesn’t matter how big or small the circle is, the ratio of circumference to diameter is constant. The actual number begins with 3.14, hence our celebration of pi on 3/14.
Here are a few interesting facts about pi that I gleaned from piday.org:
- The notion that there was a constant ratio of a circle’s circumference to its diameter has been known for about 4000 years.
- Pi is such a fascinating concept that it inspired a style of writing called Pilish, where the number of letters in each word match the corresponding digit of pi (e.g., “Buy a girl a watch” corresponds to the first five digits of pi: 3.1415.) Software engineer Michael Keith wrote an entire book, called Not a Wake in this language. (The ebook sells on Amazon for $3.14.)
- The Greek symbol for Pi wasn’t always used to represent the mathematical concept. It was introduced by the Welsh mathematician William Jones, a friend of Sir Isaac Newton, in 1706.
- In 2015, Rajveer Meena memorized and recited pi to 70,000 decimal places.
- Albert Einstein was born on March 14, 1879.
But there are other celebrations on March 14. Have you ever used the National Day Calendar? It’s a great source of information about everything we celebrate in this country (as well as good fodder for blog posts). Today is also the national day of:
Write Your Story Day (This one should motivate us all.)
Learn About Butterflies Day
Potato Chip Day
It’s fun to look up birthdays, anniversaries, or other special occasions in the National Day Calendar. I just looked up my husband’s and my anniversary. Oh – it’s today! Time to make dinner reservations at a restaurant with really good pie.
So TKZers: Take a moment to look up your special days in the National Day Calendar and let us know what you find. Extra credit if you write a few words in Pilish.