# Best ways to Celebrate Pi Day 2014

### Pi is 3.14 (about), so that makes March 14 Pi Day

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It’s the holiday for every mathematician small and large: Pi Day! If you’re not familiar, math enthusiasts around the world embrace March 14 to commemorate the mathematical constant. No matter the size of the circle, the ratio of its circumference to its diameter will always be 3.14. What better way to celebrate this than on 3/14? Here are 10 ways you and your math friends can celebrate the day. Be sure to check out our previous years’ guide to Pi Day for more tips on how to celebrate the holiday.

10 Other ways to celebrate Pi Day (2102)

MIT Preps for Pi Day the pie way

## Show off your Pi clothing

There are a variety of clothing pieces and accessories you can wear or purchase, including sweatshirts, hats and shirts. All of these were found at the Boston Science Museum’s gift store, but there are also a variety of online sites that sell Pi related clothing.

## Cut your pizza pie with a pi cutter

Can you think of a better tool to cut pizza with than a pi cutter?

## Get Fido a Pi Day shirt

Humans don’t have to be the only ones celebrating Pi Day. Order here. Have a baby too? They can also have some Pi Day fun.

## Read up on the latest scientific research on Pi

In the March issue of the American Mathematical Monthly, there is some new commentary on the number pi. Mathematicians David H. Bailey and Jonathan Browein explore whether pi’s digits are statistically random. Powerful modern computers can help mathematicians answer questions that still linger about the number using analytics software. While the numbers never repeat in pi, Bailey and Browein go searching for patterns.

## Do pi-themed crossword puzzles

On March 14, 2007 the New York Times had a handful of clues that included the pi symbol in their answers to celebrate pi day, the answers to which are pictured above. Mathgoodies.com has its own pi and circle-themed crossword puzzles to do here.

## Do a Pi-themed riddle

Can you figure out the phrase associated with this image? (Answer next slide)

## Go for a run of Pi miles (or kilometers if you want to shorten it up slightly)

And afterwards, feel free to treat yourself to some pie.

Answer from previous slide: “Pie in the Sky”

## Countdown to Pi Day

PiDay.org, the unofficial site of Pi Day enthusiasts has tools bloggers can install on their websites with a countdown clock to Pi Day.

## Can’t wait for next year’s pi day? Then don’t

Why only celebrate pi on 3/14? Folks have some up with plenty of other excuses to celebrate pi on other days of the year. July 22, for example is the closest fraction to represent pi (22/7=3.14).

## Listen to some Pi music

Math and music go well together, so there are a number of pi-related music videos. Some are good, some are not so great. We liked this one, where Michael Blake uses various instruments to “play” the number pi. He’s assigned different notes to the numerals and plays the notes in the order of pi. Technically, that could be the song that never ends…

## Defend Pi!

Pi lovers, take notice: On this day to celebrate pi, there are some haters out there. Some math enthusiasts have undertaken a movement to use tau instead of pi in mathematical equations. Tau equals 2 pi, which some argue is a more logical way to measure a circle. For an explanation, watch the video. And if you do defect to Tau instead of pi, we’ll help you celebrate Tau Day too (6/28).

## Get ready for next year

While Pi Day is an official national holiday, as ordained by the U.S. Congress in 2009, next year’s Pi Day on March 14, 2015 will be extra special because the date (3/14/15) has the first five digits of pi, not just the first three like most other pi days. So, enjoy today, but get ready for a big celebration next year.

Welcome to March 14 – international Pi Day! You remember pi – the ratio of the circumference of a circle to its diameter, also known as 3.14, plus so much more. To celebrate, each March 14 nerds around the world unite to celebrate the math holiday. This year we've come up with 10 different ways to show your love of pi. For even more ideas, check out our list from last year, which has 10 other suggestions! Happy Pi Daying!

## Eat pies

One of the most delicious ways to celebrate Pi Day is to eat a pie. There are no rules as to what a Pi Day pie is – blueberry, strawberry, rhubarb or even chicken pot pie could all do the trick. True pi enthusiasts decorate the pies to signify the Pi Day though, adding some extra crust of dough on top of the pie in the pi symbol, for example. If you're exceptionally good at making pi-themed pies, you can enter your Pi into this contest and win an iPad. The 2011 winner is shown at left.

There's no shortage of pi-themed collectables on the Internet, ranging from these fashionable earrings at Etsy in the shape of the pi symbol, to T-shirts for the nerds among us. "My pin is the last four digits of Pi," reads one shirt. For more ideas of pi-themed memorabilia, check out Etsy's fantastic selection here

## Get the Pi trainer app

If you want to be a master at reciting the digits of pi, then practice makes perfect. Thankfully, there are a variety of smartphone apps to help train yourself to memorize pi's digits. The Learn Pi Free app on the Apple App Store includes a chart showing the digits of pi, a training mode and a test mode. The Pi-morize app in the Google Play store will work similarly for Android devices.

## Be wowed by pi world records

After all that practice, now how many digits can you recite? If you think you're pretty good, you've likely got nothing compared to Chao Lu, the Chinese world record holder for reciting the digits of pi. According to PiWorldRankingList.com, which indexes world records related to pi, Lu correctly recited 67,890 digits of pi over a 24-hour period. Krishnan Chahal of India holds second-place after reciting 43,000 digits of pi in 2006.

## Search pi

One fun way to celebrate Pi Day is to use this pi search tool. Enter in any assortment of digits and the app will inform you of when those numbers appear in pi. Enter your birthday (month/day/year) to see if it appears. Is your phone number in there?

No matter your age, there are a variety of pi-themed books out there. For the youngsters, try "Sir Cumference and the Dragon of Pi," a math adventure book. Or, for older audiences, get the complete lowdown on the irrational number by reading "A Biography of the World's Most Mysterious Number," a chronicling of pi.

## Give someone a "High Pi"

The traditional celebratory hand gesture of a "high five" just isn't quite suited for Pi Day, which is why on this special day nerds give each other "High Pis." It's similar to a high five, but uses only three fingers instead of five.

## How many Pi Day references can you find?

On the big day (March 14) there are bound to be a variety of celebratory events going on out and about and around the Internet. How many can you find? In downtown San Francisco, Mission Pie is selling slices of its pie for the discounted price of \$3.14 on Thursday. In St. Louis, Pi Pizzeria has deals on pizzas. Keep an eye out for deals in your local neighborhood. Two years ago Google created this doodle for Pi Day. How many other Pi Day references can you find?

## Watch a really good pi movie

"Life of Pi" the book garnered considerable attention first in the literary world, and as a movie, earned 11 Academy Award nominations this year and won in four categories. Director Ang Lee – who also directed "Crouching Tiger, Hidden Dragon" – took home the Oscar for best director.

## 2012 edition

There are holidays, and then there are holidays for nerds, and March 14 (3.14) is one of those. Based on the mathematical constant number that represents the ratio between the circumference and the diameter of a circle, Pi Day has grown to become somewhat of a day to celebrate for mathematicians and techies. Here are 10 things to do on the big day.

## Make a pi-themed pie

What tastes better than pie? A pi-themed pie on Pi Day, of course. The process to make a pi-themed pie is similar to the one used to make a regular pie, except one important difference: Reserve some dough at the end to make a pi symbol to slap on top. For complete directions, click here.

## Rock a Pi Day T-shirt

Clothing accessories are a great way to show off your Pi Day pride. There’s a variety of pi-themed clothes to wear, including the Super Pi shirt, and shirts emblazoned with scary graphics showing what the world would look like without pi. Or, if you’d like to decorate your car, purchase the “I’d rather be deriving” license plate holder.

## Write Pi-kus or Pi-ems

For those of you who are wordsmiths, there are ways to celebrate the day through the written word as well. For example,write a pi-ku or a pi-em, all about pi. NPR asked readers to submit pi-kus in which the first line has three syllables, the second line has one and the third line has four. Here’s one:

Hello Pi

Oh...

Endless digits

## Go on a pi scavenger hunt

Pi is an endless number, so look for numbers that are important to you in it. Search for your birthday, a family member’s birthday or other important dates or numbers in pi. Pi goes on forever, so it’s got to be in there somewhere, right? For reference, click here for a list of the first 1,000,000 decimal places.

## See how many digits of pi you can recite

Pi goes on forever, so you can’t possibly recite them all. But, there are contests to see just how far you can go. Can you beat Benjamin Most, who recited 2,552 digits?

## Watch “Pi” the movie

If you’re a movie buff, there are ways for you to celebrate too. You can, for example, watch “Pi” the movie. As described by IMDB, it is about “a paranoid mathematician who searches for a key number that will unlock the universal patterns found in nature.”

## Listen to Pi music

Musicians at heart have embraced Pi Day as well, by making a variety of songs. Some will help you remember the numbers in pi. Others are catchy jingles that can be played during cocktail parties, as children’s performer David Perry does here.

## Tell Pi Day jokes

For the pi-enthusiast pranksters, there are one-liner jokes you can tell on Pi Day. Such as: Mathematician: 'Pi r squared' Baker: 'No! Pies are round, cakes are square!' Or… Question: What do you get when you take the moon and divide its circumference by its diameter? Answer: Pi in the sky.

## Celebrate Albert Einstein’s birthday

Pi Day just so happens to also be Einstein’s birthday. So, while you’re at it, pay tribute to the father of modern physics.

After a long day of celebrating Pi Day, perhaps all you’ll want to do is sit and read a nice pi book. For that, there are plenty of options, including the biography of Pi and the Joy of Pi. If you have a son or daughter, perhaps they would like to read the story of Sir Cumference and the Dragon of Pi. And, if you don’t want to read about math, there is always the critically-acclaimed Life of Pi book by Yann Martel, which has very little to do with the number.

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