Pi Day Shirt — What is it and Where to Buy?

Aria Kim
10 min readMar 11, 2024

Hey fellow math enthusiasts and cool cats! Today, I’m diving into the wonderful world of Pi Day shirts — those epic, funny, and totally geeky pieces of clothing that make celebrating Mathematics feel like a party.

Pi shirt in white with a black spiral text, also offered in various base colors.
White Pi shirt with black spiral text, also available in different base colors.
Choose the type of design and shirt you like, the base color can be adjusted as well!

Where to Buy the Pi Day Shirt?

Now, let’s talk about where you can snag the coolest Pi Day shirt. Look no further than Redbubble! Trust me; I spend hours scrolling through their site because they have the most unique designs.

Their clothes are top-notch quality too! Redbubble is like a treasure trove for anyone who loves cool, epic, and funny stuff.

A stylish design for a Pi Day shirt.
One of the cool Pi Day shirt designs.

Also, don’t forget to check out other cool products with the same design, such as cups, pillows and hoodies, simply scroll to and choose the ones you like!

Be sure to discover more fantastic items showcasing the same designs, such as cups, pillows, and hoodies. Simply scroll through and choose the ones that appeal to you!
Make sure to explore additional awesome items featuring identical designs, like cups, pillows, and hoodies. Just scroll through and pick the ones that catch your eye!

What is Pi Day?

Pi Day, marked annually on March 14th (3/14 — a clever nod to the first three digits of Pi), is a truly fantastic celebration. On this special day, a diverse community of nerds and geeks, including individuals like myself and presumably you too, unites to revel in the glory of the mathematical constant Pi (π).

It transcends the ordinary, offering a unique opportunity to immerse ourselves in the wonders of all things circular and infinite. It’s a date that stands out on the calendar, not just for its numerical significance but for the vibrant spirit of curiosity and appreciation it fosters among those who share a love for the intriguing world of Mathematics.

Also check out my Egyptian Hieroglyphics Chart

This annual extravaganza isn’t merely about numbers; it’s a celebration of the beauty hidden within the infinite decimals of Pi. From mathematical aficionados to those just dipping their toes into the mathematical waters, Pi Day is an inclusive event that encourages everyone to join in the festivities. It’s a chance to embrace the elegance of mathematical constants, sparking conversations, hosting events, and fostering a sense of camaraderie among individuals who find joy in the fascinating realm of numbers.

So, as March 14th approaches, gear up for an experience that goes beyond the ordinary — a celebration where the infinite possibilities of Pi come to life, uniting minds in a shared fascination for the extraordinary world of Mathematics.

What is the Pi Day Shirt?

Picture this: you, rocking an awesome Pi Day shirt that screams, “I’m not just celebrating a number; I’m embracing the geek-chic lifestyle!” These shirts are more than just clothes; they’re a statement — a nod to the beauty of Mathematics and the wonders of the irrational number π.

Imagine walking around, proudly displaying your love for all things circular and infinite!

What is Pi?

Now, let’s break down the star of the show — Pi. Pi is a mathematical constant that represents the ratio of a circle’s circumference to its diameter. It’s approximately 3.14, hence the celebration on March 14th (clever, right?). But here’s the cool part: Pi is an irrational number, meaning its decimal expansion goes on forever without repeating. It’s like the rockstar of numbers, always keeping us on our toes!

Short Personal Experience with Pi Day So, let me share a little personal experience. Last Pi Day, I decided to go all out — rocking my favorite Pi Day shirt, of course. I hit the local pizza place because, hey, Pizza sounds a lot like Pi. I couldn’t help but laugh at the perfect connection between the two — both delicious and infinite in their own ways.

In the midst of cheesy goodness, I found myself explaining Pi to my friends, turning a casual pizza night into a mini geek-fest. Who knew Mathematics could be so much fun? It was a blast, and I can’t wait to do it all over again this Pi Day.

Fun facts about Pi

Here are some fun facts related to Pi Day, Pi, and mathematics:

  1. Pi Day Origin:
    Pi Day started becoming popular in 1988 when physicist Larry Shaw celebrated it at the San Francisco Exploratorium. The date was chosen because of the first three digits of Pi: 3.14.
  2. Pi World Record:
    In 2015, Rajveer Meena set the Guinness World Record for reciting the most decimal places of Pi. He recited 70,000 decimal places in just over 10 hours.
  3. Pi in Pop Culture:
    Pi has made its way into popular culture, appearing in movies like “Pi” (1998) and even as a character in the animated series “The Simpsons.”
  4. Buffon’s Needle Problem:
    A probability problem named after Georges-Louis Leclerc, Comte de Buffon, involves dropping a needle on a plane with parallel lines. The solution relates to the value of Pi.
  5. Feynman Point:
    The sequence of six nines (999999) in Pi is known as the “Feynman Point,” named after physicist Richard Feynman. It occurs at the 762nd decimal place.
  6. Pi Day Legislation:
    In 2009, the U.S. House of Representatives officially recognized March 14th as National Pi Day, thanks to the efforts of Congressman Joe Baca.
  7. Approximations of Pi:
    Ancient civilizations approximated Pi differently; the Babylonians used 3.125, the Egyptians used 3.16, and the Greeks used fractions.
  8. Pi in Architecture:
    Some architects incorporate the mathematical concept of Pi into their designs. For instance, the Gherkin building in London has a floor plan that reflects the mathematical ratio of Pi.
  9. NASA and Pi:
    NASA often uses Pi in its calculations for space missions, considering the precision required in celestial mechanics.
  10. Pi Day Celebrations:
    Schools, museums, and math enthusiasts around the world celebrate Pi Day with various activities like pie-eating contests, Pi recitation challenges, and educational events.
people having fun
Photo by Helena Lopes on Unsplash

FAQ

1. What do you do in Pi Day?
Celebrate the mathematical constant Pi (π)! Many people engage in fun and geeky activities, wear Pi Day shirts, enjoy circular treats, and maybe even explore the wonders of Mathematics. From organizing Pi-themed trivia nights to participating in pie-eating contests, Pi Day offers a playful opportunity to appreciate the beauty of numbers in a light-hearted and entertaining way. Whether you’re a math enthusiast or just someone looking for an excuse to have some fun, Pi Day has something for everyone.

2. Why do we eat pie on Pi Day?
Eating pie on Pi Day is a playful pun! Since “pie” sounds like “pi,” indulging in a slice of this delicious treat adds a tasty twist to the celebration. It’s a whimsical tradition that has caught on, turning what could be a solely academic observance into a delightful culinary experience.

From classic apple pie to savory quiches, the options are as infinite as the digits of Pi, making indulgence in pie a fun and delicious way to honor this mathematical constant.

3. Who celebrates Pi Day?
Anyone and everyone with a love for Mathematics and a flair for geek-chic festivities! Students, teachers, scientists, and even those who just enjoy a good nerdy party get in on the Pi Day fun. It’s a celebration that transcends age and professional boundaries, uniting people in their shared enthusiasm for the wonders of Pi.

Whether you’re hosting a Pi Day event at school or simply enjoying a slice of pie at home, the inclusive nature of Pi Day makes it accessible and enjoyable for all.

4. Why is Pi Day on the 14th?
Pi Day is on March 14th (3/14) because the first three digits of Pi are 3.14. It’s a clever way to connect the date with the mathematical constant. This choice of date adds a playful touch to the celebration, making it memorable and easy to remember.

The connection between the date and the first few digits of Pi adds an extra layer of geekiness to the festivities, turning March 14th into a day of mathematical revelry.

5. Where can I buy a Pi Day shirt?
Redbubble is the go-to spot! They offer a fantastic collection of unique, cool, and funny Pi Day shirts that let you celebrate in style. Redbubble’s platform empowers artists to showcase their creativity, ensuring that you’ll find a diverse range of Pi Day designs that cater to different tastes and preferences.

From witty mathematical humor to artistic representations of Pi, Redbubble provides a curated selection of Pi Day shirts for those who want to add a touch of geek-chic to their wardrobe.

6. Can I find Pi Day shirts for kids on Redbubble?
Absolutely! Redbubble has a diverse range of Pi Day shirts suitable for all ages. Explore their collection, and you’ll find options perfect for the little mathematicians in your life.

The playful and kid-friendly designs on Redbubble ensure that even the youngest members of the Pi Day celebration can sport cool and age-appropriate attire. Let the little ones join in the geeky fun with Pi Day shirts that cater to their unique interests.

7. Do Pi Day shirts come in different colors and sizes?
Yes! Redbubble offers a variety of colors and sizes for their Pi Day shirts. You can choose the one that suits your style and ensures a comfortable fit.

Whether you prefer a classic black Pi Day shirt or want to add a pop of color to your celebration, Redbubble’s diverse color options allow you to express your individuality. Additionally, the range of sizes ensures that everyone can find the perfect fit for a day of mathematical merriment.

8. Can I wear a Pi Day shirt on other occasions?
Absolutely! While Pi Day is the prime time to rock your Pi Day shirt, there’s no rule against wearing it whenever you want. Show off your love for Mathematics all year round! The versatility of Pi Day shirts extends beyond this specific date, making them a quirky and stylish addition to your wardrobe.

Whether you’re attending a math-themed event, expressing your geeky side, or simply want a conversation starter, your Pi Day shirt is welcome at any time.

9. Are there Pi Day events I can join?
Yes! Many schools, organizations, and communities host Pi Day events. Check local listings or online platforms to find exciting gatherings and activities to participate in. Pi Day events can range from educational lectures and workshops to fun-filled contests and competitions.

Joining these events allows you to connect with fellow math enthusiasts, share your passion for Pi, and participate in engaging activities that make the celebration even more memorable.

10. Can I create my own Pi Day design on Redbubble?
Absolutely! Redbubble allows artists to showcase their creativity. If you have a unique Pi Day design in mind, you can create and share it on Redbubble for others to enjoy and celebrate with you. Whether you’re an aspiring artist or someone with a specific vision for a Pi Day shirt,

Redbubble’s platform empowers you to turn your ideas into tangible and shareable pieces of art. Express your individuality, contribute to the diverse world of Pi Day designs, and share your creativity with the global community of math enthusiasts.

10. What is Redbubble?
Redbubble is a vibrant online marketplace that serves as a haven for artists, designers, and creatives from around the globe. Launched in 2006, this platform has grown into a thriving community where individuals can showcase and sell their artistic creations on an array of products, from T-shirts and hoodies to stickers, home decor, and more.

What sets Redbubble apart is its commitment to uniqueness; the marketplace prides itself on offering an extensive array of designs that cater to diverse tastes and interests. The platform empowers artists to express their creativity freely, turning their artwork into tangible, high-quality products that customers can proudly incorporate into their lives.

Navigating through Redbubble is a delightful experience, akin to strolling through a digital art gallery filled with an eclectic mix of styles. Artists have the flexibility to set their own profit margins, and customers can discover one-of-a-kind pieces that resonate with their individuality.

Redbubble not only supports independent artists but also fosters a sense of connection between creators and consumers. Whether you’re searching for a unique Pi Day shirt, a quirky phone case, or artwork to adorn your living space, Redbubble provides a diverse and dynamic marketplace that transforms art appreciation into a tangible and accessible experience for everyone.

In conclusion

The Pi Day shirt from Redbubble is more than just a garment; it’s a vibrant expression of our love for Mathematics and the playful celebration of the infinite and irrational beauty of Pi.

With its unique designs and top-notch quality, Redbubble is the go-to destination for those seeking cool, epic, and funny attire to rock on March 14th.

So, gear up, embrace the geek-chic lifestyle, and let your Pi Day festivities be as infinite as the number itself — all while looking stylish and having a bit of nerdy fun! Happy Pi Day, fellow math enthusiasts! 🥧✨

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Aria Kim

Asian American journalist, storyteller, and blogger seamlessly blends news reporting and creative expression with captivating insights.