# Pi Day is March 14

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## Pi Day! Not pie. Pi!

Pi Day is observed on March 14 (3/14) in honor of the mathematical constant pi, frequently represented as 3.14. While most people learn about pi in school, some especially enthusiastic fans celebrate the constant with Pi Day festivities.

Pi Day coincides with the birthdate of Albert Einstein, which provides additional reason to celebrate.

image from PiDay.org

## What is Pi Day About?

Here's a very helpful video from Discovery News. It explains what Pi is, why it's important, and why people celebrate Pi Day.

## Top Ten Ways to Celebrate Pi Day

I've done quite a bit of research and reading about how people celebrate Pi Day. Here are my ten favorite Pi Day observances and activities. If you have suggestions, please leave a comment below! I'm always looking for more great ideas!

1. Eat some Pie. If you're having a party, serve 3.14 pies.
2. Take a pi photo. Find 2 friends and lie down in the shape of pi. Take a photo and post it!
3. Walk or run pi. It can be 3.14 miles, kilometers, blocks or laps.
4. Make pi-shaped food. Use a cookie cutter or food mold for cookies or Jell-o.
6. Memorize some pi. Start with 3.14 and go as far as you want!
7. Tell some pi jokes. Here's one to get you started.

Q: What do you get if you divide the circumference of a bowl of ice cream by its diameter?

A: Pi a la mode.

8. Convert numbers into units of pi. For example, if you're 31 years old, say you're 10pi.
9. Wish people "Happy Pi Day!" Especially people who don't know what you're talking about. Help get the word out.
10. Countdown to pi minute at 1:59 on March 14. It's 3/14 1:59. (3.14159) This is the quickest, easiest and least time-consuming observation of Pi Day.

## Pi Day Accessories

Make Pi Day even more pi-tacular with fun cookie cutters and accessories.

## How long is Pi?

### hint: you'll never guess correctly

Pi has been calculated to over one trillion digits beyond its decimal point, although only 39 digits past the decimal are necessary to calculate the spherical volume of the universe. As an irrational and transcendental number, pi will continue infinitely without repetition or pattern. Pi's infinite nature makes it a super challenge to memorize, if you don't mind knowing you'll never be able to learn all of the digits.

Want to get started? I don't have room to list an inifinite number of digits. So, here are 50 digits of pi. Enjoy!

3.14159265358979323846264338327950288419716939937510

source: Digits of pi

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## Did you know...

3.14% of sailors are pirates.

## Pi Day Party Essentials

Whether you're a party of one or throwing a big Pi Day Palooza, you'll need some supplies to help set the celebratory mood. Maybe these will help.

## Pi Day Pics - memes, photos, and other fun visuals

Click thumbnail to view full-size
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Pumpkin is my favorite kind of pi pie!
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from http://cheezburger.com/6816079616
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from http://brillantezzapuro.tumblr.com/post/25001660011
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from http://www.sosmath.com/CBB/viewtopic.php?f=8&t=58888

## Pi Day Activities and Events

Believe it or not, Pi Day events are becoming more and more popular. Check this growing list to see if there's one near you, or get some ideas for starting your own Pi Day party! Have one to add to the list? Leave me a comment below!

## Pi Day Songs

These songs are full of pi puns, which will make you giggle and/or groan. Enjoy!

## Did you know...

In Alaska, where it gets very cold, pi is only 3.00. As you know, everything shrinks in the cold. They call it Eskimo pi.

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## Pi Day Teacher Resources

Looking for printables and activities to incorporate into your Pi Day lesson plan? Try some of these sites for teacher resources.

## Epic Pi Day in 2015

An extra-special Pi Day is coming up in 2015! On March 14, 2015 at 9:27, the date and time will look like the numerical representation of pi to seven digits past the decimal point: 3.1415927

Put it on your calendar now, so you don't miss this epic Pi Day!

Last updated on March 16, 2014

## Follow (0)Are you a Pi Day fan? How do you celebrate? 52 comments

Merrci 6 months ago from Oregon's Southern Coast Level 8 Commenter

Fun and cute and a big congratulations for your 100th! That's very exciting and still another cause to celebrate!

geeky247 6 months ago from Colorado Hub Author

@Merrci: Thank you Merrci!!

Elsie Hagley 6 months ago from New Zealand Level 7 Commenter

Interesting this is the first time I have heard of Pi day. Sorry I don't celebrate, but at least I learnt something new today by reading this page Thanks.

geeky247 6 months ago from Colorado Hub Author

@Elsie Hagley: Thanks for stopping by! And now you know! :-)

anonymous 6 months ago

It's really a fun and cute lenses, very happy to see them!

Brite-Ideas 6 months ago from Toronto, Canada Level 7 Commenter

lol! funny - congratulations on LOTD - Love how Pi shrinks in Alaska lol!

reall nice and fun lens!

shared it.

esmonaco 6 months ago from Lakewood New York Level 7 Commenter

I had no Idea that Pi was celebrated!!! Where have I been?? Very nice, Thanks and Congratulations on LOTD!!!

VioletteRose LM 6 months ago Level 4 Commenter

This is interesting, I never knew that a day is celebrated in honor of Pi. Thanks for sharing!

parkseungwoo 6 months ago

wonder pie

Merrci 6 months ago from Oregon's Southern Coast Level 8 Commenter

Just stopped back by to congratulate you on LofT! That is wonderful, and still another reason to celebrate today. Love your lens!

writerkath 6 months ago Level 3 Commenter

Congratulations on your LotD! I have never understood Pi, and even listening to the video, I'm even more confused. I cannot wrap my head around how anyone could have come up with this to begin with. :)

GrammieOlivia 6 months ago from Toronto Level 7 Commenter

No, but after this lens I think I'm missing out on a good celebration! congratulations on LoTD! This is a great lens!

SusanDeppner 6 months ago from Arkansas USA Level 7 Commenter

Fun! I love the sailors/pirates statistic. Guess I'd better celebrate, probably with a pie. Congratulations on your very entertaining and informative Lens of the Day!

Diana Wenzel 6 months ago from Colorado Level 6 Commenter

An excellent reason to celebrate. Maybe I'll bake a birthday Pi for Albert. Congrats on LotD!

delia-delia 6 months ago Level 5 Commenter

Congratulations on LOTD! Very interesting, really never thought about Pi being a special day...and now I have another celebrating day to honor.

Faye Rutledge 6 months ago from Concord VA Level 5 Commenter

Happy Pi Day! Congratulations on LotD!

Dressage Husband 6 months ago from Pine Grove, Nova Scotia, Canada Level 5 Commenter

Not really but it is a fascinating number. Did you know that you can prove a straight line is a circle? This is done by mapping all the tangents to a circle and differentiating to the nth degree where n tends to infinity. The resulting graph can be shown to be continuous and hence +infinity is equal to -infinity at which point the straight line meets itself and it is therefore an infinite circle. The Universe can be plotted in the same way and is therefore an infinite globe.

This weird mathematical fact is not explainable in our 4d world and could not be done had we not discovered Pi. No wonder it is called an irrational number! Well done on the LOTD!

SteveKaye 6 months ago from Placentia, CA, USA Level 5 Commenter

I'm going to find a way to include pi in every sentence today.

Heather426 6 months ago from Amarillo, Texas Level 1 Commenter

Well I'm a fan of pie, does that count? LOL Now that I know about it , I'm a fan of Pi Day. I find mathematics fascinating especially how it underpins the structure of the Universe.

Donna Cook 6 months ago from Denver, Colorado USA Level 5 Commenter

Great lens! Wasn't aware of Pi Day but am a fan now!

Spirality 6 months ago Level 2 Commenter

I never knew there was a Pi Day.

ChocolateLily 6 months ago

I totally forgot it was Pi Day! Duh! Thanks for reminding me!

boneworld 6 months ago from West of Left South Lucky Level 4 Commenter

We celebrate this every year where I work. It's a great day for trying all kinds of strange kinds of pie.

Valerie Bloom 6 months ago from Pennsylvania, USA

My co-workers were surprised and a little confused but very happy when I brought coconut cream pie (decorated with a chocolate chip pi) to work to celebrate!

sounds like such a lot of fun

anonymous 6 months ago

I barely passed geometry, no way I'm celebrating. Seriously, this was a fun lens. Congratulations on getting LotD!

Lynn Klobuchar 6 months ago from Minneapolis, Minnesota Level 6 Commenter

I had a lot of fun telling students it was pi day Congratulations on lens of the day.

geeky247 6 months ago from Colorado Hub Author

@Lynn Klobuchar: Thank you! Glad you could share it with the students!

geeky247 6 months ago from Colorado Hub Author

@anonymous: LOL! Thank you!

geeky247 6 months ago from Colorado Hub Author

@Valerie Bloom: Excellent way to share the holiday with them! Great job!

geeky247 6 months ago from Colorado Hub Author

@boneworld: Any excuse for more pie is good!

geeky247 6 months ago from Colorado Hub Author

@ChocolateLily: You're welcome!

geeky247 6 months ago from Colorado Hub Author

@Spirality: Glad to introduce you to the holiday!

Carol Houle 6 months ago from Montreal Level 2 Commenter

10 trillion? I had no idea. It opened my mind. You made my day. Thank you!

geeky247 6 months ago from Colorado Hub Author

@Donna Cook: Hooray for a new Pi Day fan!

geeky247 6 months ago from Colorado Hub Author

@Heather426: Yes! I love pie and pi!

geeky247 6 months ago from Colorado Hub Author

@SteveKaye: Excellent goal! :-)

geeky247 6 months ago from Colorado Hub Author

@Dressage Husband: Wow! I didn't remember learning all of those fascinating things. Thanks for the info!

geeky247 6 months ago from Colorado Hub Author

@Faye Rutledge: Thank you very much!

geeky247 6 months ago from Colorado Hub Author

@delia-delia: I love celebrating! Glad you have a new holiday. :-)

geeky247 6 months ago from Colorado Hub Author

@Diana Wenzel: I think he would appreciate that!

geeky247 6 months ago from Colorado Hub Author

@SusanDeppner: Thank you! Don't let the pirates steal your pie. :-)

geeky247 6 months ago from Colorado Hub Author

@GrammieOlivia: Thank you!

geeky247 6 months ago from Colorado Hub Author

@writerkath: Thank you for visiting!

geeky247 6 months ago from Colorado Hub Author

@Merrci: Thank you so much!

geeky247 6 months ago from Colorado Hub Author

@VioletteRose LM: Thanks for stopping by!

geeky247 6 months ago from Colorado Hub Author

@esmonaco: Thank you for visiting!

geeky247 6 months ago from Colorado Hub Author

@dilipyadav: Thank you for visiting and sharing!

geeky247 6 months ago from Colorado Hub Author

@Brite-Ideas: Thank you!

geeky247 6 months ago from Colorado Hub Author

@anonymous: Thank you!

Arachnea 6 months ago from Texas USA Level 6 Commenter

I came across you lens for Pi day on Pi day. So, I thought it apt to take a look. Fun lens. I also made sure to wish all of my colleagues a happy Pi day.