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Pi is a mathematical constant that is the ratio of a circle's circumference to its diameter, or simply the circumference divided by the diameter. It is also one of the most revered mathematical constants in the known world.^{[1] X Research source } Pi Day was first officially celebrated on a large scale in 1988 at the San Francisco Exploratorium.^{[2] X Research source } Since then, Pi Day has been celebrated by millions of students and mathlovers each year. The holiday is celebrated on 14th March, since 3 (the month of March) 1 and 4 (the 14th day) are the first three and most wellknown digits in the decimal form of pi. Though you can observe this fun little holiday however you choose, there are a few Pi Day celebrations that are popular and guarantee a good time for everyone!
Steps
Method 1
Method 1 of 4:Enjoying PiThemed Foods

1Have a pi feast. No Pi Day activities are complete without pi foods! Eating these may be the easiest and the most fun way to celebrate pi. If you're in school, everyone can bring in a pithemed food for a pi pot luck, and if you're just celebrating with friends, you can all enjoy a pithemed meal together.

2Eat pie. While "pie" and "pi" are spelled differently, they sound the same so eating pie on Pi Day is a popular option. Furthermore, since traditional pies are round, their circular shape acknowledges the mathematical importance of pi.
 Eat any type of pie. Try key lime pie, pumpkin pie, pecan pie, or apple pie. You can even make a special Pi Day pie in honor of the day.
 For something a little different, consider purchasing and using a pie pan shaped in the mathematical symbol for pi. Such pans can be purchased online.^{[3] X Research source }
 Pi foods don't have to be limited to desserts. Eat shepherd's pie or chicken pot pie.

3Choose circular foods. Any food that has a circular shape can be fit for your feast due to the mathematical significance of pi. You might try making cookies, cakes, cupcakes, or pancakes.
 Consider using icing to put the pi symbol on a variety of cookies, pies, and cupcakes. You can even make the foods in advance and write pi on them in icing in a big group.
 Similarly, you can use pishaped cookie cutters, pans, and freeform techniques to shape these foods in the symbol for pi.

4Make a pun. Serve foods that start with the letters "pi." For instance, you could eat pineapple, pizza, or pine nuts, or drink piña coladas and pineapple juice.
 You might even consider combining this idea with some of the others. Write the symbol for pi using toppings on your pizza or make a pineapple pie.
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Method 2
Method 2 of 4:Creating a PiThemed Ambiance

1Wear pithemed clothing. Math geeks and clothing manufacturers have a better relationship than you might expect. Consider purchasing a tshirt with the mathematical symbol for pi on the front and wearing it on the special day. You can easily find these shirts online.
 If you don't want to buy a shirt, consider creating your own pi shirt using fabric paint and a pishaped stencil instead.
 You can also wear pi accessories. This idea can be taken further to include pi symbol pendants and other jewelry, or you can take a representative approach by wearing something like a necklace with beads representing the numbers of pi,
 You could even consider wearing a pi symbol temporary tattoo.

2Carry pi with you where you go. Shop around online for some fun pi paraphernalia, like pi mugs and pi watches.
 Another option would be to put pi symbol stickers on your belongings.
 If you want to spread the celebration, try giving away pencils with pi symbols on them.
 Make your computer or phone background into something related to pi. The symbol might work, or you can have a background filled with bubbles or other circular shapes.
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Method 3
Method 3 of 4:Throwing a PiThemed Celebration

1Play pi games. Pi games will not only be fun, but they will improve your understanding of pi and will make everyone around you have a deeper appreciation of pi.
 There are plenty of traditional games that are appropriate on Pi Day, like a piñata, a pieeating contest, or a pieintheface fundraiser.
 Answer math questions. Come to Pi Day with at least ten math questions you can spring on people. They should be related to geometry, trigonometry, or other fields where pi is particularly useful.
 Conduct a Pi Day Scavenger Hunt. Hide pithemed objects around your classroom, home, or other celebration venue. You can also hide objects representing the digits of pi: three baseballs, one frisbee, four basketballs, etc.
 Pi Day also happens to be the birthday of Albert Einstein. Play an Einsteinthemed trivia game, or have an Einstein impersonator contest.^{[4] X Research source }
 Have a pi memorization or recitation contest. As soon as someone loses, you can hit him in the face with a pie. If you want to really show your dedication on Pi Day, learn to memorize pi in advance by studying as many of the digits of pi as you can.

2Use your artistic side to celebrate pi. You don't have to be a leftbrained thinker to fully celebrate pi. You can use your creative side to show how much you love and appreciate pi. And even if you're not the world's most talented poet or writer, you can still have fun while being silly. You don't have to create art to celebrate pi; you can also just appreciate art that already celebrates it. Here are a few ways to celebrate pi artistically:
 Write poetry. Write either a piku (haiku) or a regular piem (poem) to show how much you love pi.
 Write a pithemed song and sing it, or write a short pithemed skit and act it out.
 Paint a picture of pi.
 Watch movies related to pi. Try the film πit's an interesting and dark movie about a mathematician who goes crazy, but intended for an adult audience only. You could also watch the film Life of Pi.^{[5] X Research source } Technically "Pi" is only the protagonist's name, but it has gotten people thinking about pi.
 Listen to Kate Bush. Progressive rock musician Kate Bush performed a song titled π on her 2005 album Aerial. Bush sings pi to its 137th decimal place, but omits the 79th through 100th decimal places of pi for unknown reasons.

3Get physical with pi. You can also use your physical prowess, or even your car, to show your love for pi. Here are a few things you can do to celebrate pi:
 Do a pi mile run. Run 3.14 miles (5.05 km), which is just a tiny bit longer than a 5K. You can take this a step further by organizing a pi mile run with friends or colleagues.
 Lay down in pi formation and take a picture. If you're bold, have two people standing up while holding up a third person who is lying sideways in between them. Make sure the lightest person is on top.
 Drive exactly 3.14 miles (5.05 km).
 March in a circle to show your love for pi.
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Method 4
Method 4 of 4:Celebrating the Real Meaning of Pi Day

1Celebrate at 1:59 PM on Pi Day. This time represents the next three digits of pi: 3.14159. Take a minute to acknowledge pi in whatever way you see fit at that moment During this minute, you can cheer wildly, or even have a countdown leading up to "pi minute" the minute before.
 For added effect for a countdown, have a "pi drop" where you drop a big pie off a balcony or another elevated structure. You can even add a lot of sprinkles to the pie to make it look like a disco ball.
 If you've written a pi song or made a pi dance, this would be the perfect minute to share your art.
 Note that there is some debate regarding the exact time that Pi Day should be celebrated. Though 1:59PM is probably the most common, some believe that the 24hour clock should be used instead, which would mean that Pi Day should be celebrated at 1:59AM or 15:09PM.

2Convert things into pi. This step is absolutely necessary for two reasons: first, to utterly confuse people who have no idea what you're talking about, and secondly, to have fun seeing how many things can be referenced with pi. This will help you reach an even higher appreciation for the amazing number that is pi. Consider two approaches:
 Use pi to tell the time. Convert naturally circular things into radians, like the hours on the clock. Instead of it being 3 o'clock, now it's 1/2 pi o'clock. Or, instead of it being 3 o'clock, convert the inclination of the sun into radians and describe that as the time.
 Simply use 3.14 as a unit of measure. Instead of being 31 years old, you are 9pi years old. With this same approach, you can find out your next pi birthday  just don't forget to celebrate it when it comes!

3Help the tradition continue. Don't let this be a onetime thing — you owe it to pi to celebrate again and again. Set the date for next year and consider creating a pi club or website in the process.
 Talk about your plans for Pi Day the following year. This will help generate enthusiasm.
 Take notes after your Pi Day celebration. What can you do next year to make your celebration even more incredible?
 Next year, talk about the day months in advance so your skeptical friends can be convinced to join in. You can even advertise for the event by emailing your closest friends or even setting up a Pi Day Facebook page.
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Community Q&A

QuestionWhat are some appropriate Pi Day activities for kids?Community AnswerYou can make some simple pies, such as filling premade pie crusts with pudding and/or whipped cream. If the kids like arts and crafts, you can have them design their own pithemed tshirts using puff paints. For a physical activity, you can have the kids do a pi run/walk.

QuestionIs Pi Day a national holiday?Community AnswerIt is not a national holiday, but it can be celebrated across the country.

QuestionWhy is the time 1:59 significant?Community AnswerIt is significant because the first few digits of pi are 3.14159. Pi day is 3/14 (March 14th), and the most significant time on pi day would be the digits that come next, or 1:59.

QuestionCan I add pi to something to celebrate Pi Day?Community AnswerYes. The more pi you manage to incorporate into your day, the better your Pi Day becomes.

QuestionWhy did people consider celebrating Pi Day at 1:59? Why not 3:14?Both times would be excellent for celebrating Pi Day, as would any time during the day. People consider celebrating Pi Day at 1:59 since the first few digits of pi are 3.14159, so they would be celebrating on 3/14 at 1:59.

QuestionCan Pi Day be celebrated in Britain?Pi Day can be celebrated anywhere. If you enjoy the number pi, consider having an event to commemorate the day.

QuestionHow many soccer balls do I have to hide for the Pi Day scavenger hunt?Hide the amount of soccer balls that correlate to the next digit in pi. If, for example, you've hidden 3 baseballs, 1 hat, 4 boxes, and 1 stuffed animal, hide 5 soccer balls to stick with the digits of pi (3.1415).

QuestionIn which countries is Pi Day popular?Pi Day is recognized worldwide, and thus, it is celebrated across the globe in many countries. It is perhaps most common in the United States. Many other locations use the day/month/year format for time and instead celebrate Pi Approximation Day on 22 July (for 22/7).
Tips
 Show your love for pi by getting married on Pi Day. There's nothing more romantic than being married to the one you love at 1:59:26 PM on March 14th to show that, like pi, your love will continue forever.Thanks!
 Pi day is also Einstein's Birthday.Thanks!
 Note that Pi Approximation Day is held on July 22, because when you use the DD/MM format, it is shown as 22/7, the fraction for pi.Thanks!
 Pi continues indefinitely, and so far it has been tracked out to 2,576,980,377,524 (over 2 trillion) digits after the decimal place using a computer. ^{[6] X Research source }Thanks!
References
About This Article
There are lots of fun ways to celebrate pi day, like having a pieeating contest or wearing a shirt that has the pi symbol on it! You can also eat pithemed foods, like pie, pizza, pancakes, or any other circular food. If you're feeling active, go for a 3.14mile run or do some jumping jacks for 3 minutes and 14 seconds. Or, if you're feeling artistic, you can paint the pi symbol or write a song about pi. Just don't forget to celebrate at 3:14 PM. If you want to learn pithemed games to play with friends, keep reading!