π Pi Day 2025 – Mar 14

🥧 National Pi Day ORIGIN & HISTORY

National PI Day is celebrated on the 14th Day in March.

Early Studies of Pi

Pi (π) has been known and studied for thousands of years. Ancient civilizations like the Babylonians and Egyptians approximated pi for practical use in architecture and engineering. Archimedes of Syracuse (c. 250 BCE) was one of the first mathematicians to rigorously estimate pi’s value using polygons. Over the centuries, mathematicians worldwide continued refining its calculation.

The Birth of National Pi Day (1988)

The official celebration of Pi Day began in 1988 when physicist Larry Shaw and his colleagues at the Exploratorium (a science museum in San Francisco) organized the first event. They chose March 14 (3/14) because the date reflects the first three digits of pi (3.14). The event featured discussions about pi, math-related activities, and—most notably—eating pie, creating the tradition we know today.

Growing Recognition and Popularity

After the Exploratorium’s first Pi Day celebration, the idea spread. Schools, universities, and math enthusiasts embraced it as a fun way to celebrate math. As the internet grew, Pi Day gained traction worldwide, with competitions for reciting pi digits, themed events, and social media celebrations.
U.S. Government Recognition (2009)

In 2009, the U.S. House of Representatives officially recognized March 14 as National Pi Day, passing a resolution (House Resolution 224) to promote math and science education. The resolution encouraged schools and teachers to use the day to spark interest in STEM subjects.

Pi Day and Albert Einstein

March 14 is also the birthday of Albert Einstein (born March 14, 1879). Because of this, some celebrations also honor Einstein’s contributions to physics and mathematics, making the day even more special for science enthusiasts.

An ALTERNATIVE Look at Pi Day by PAPI

Today is March 14, and I believe some folks call it “Pie Day!”

So, is this the day to eat a slice of our favorite pie? Sadly nope! The spelling has to be altered by dropping the e; just keep the pronunciation. Quite often, the ancient Greek letter “π” is used to represent the identical sound associated with pronouncing pi. Yep, it still sounds like pie, doesn’t it? We can revisit this pie thing later.

Today is also 3/14, and that’s the reason we can make a phenomenal association with a multitude of processes and developments using those three particular numbers. Those avenues of discovery are rewarding to anyone who searches for them. Of course, everyone will now recognize 3.14 as the number of diameter lengths that fit around a circle in order to calculate its diameter, better known as pi. The 3.14 does not become, but it “is” an unending number. Many attempts have been made in ancient times and now, well into advancing computer capabilities, to find the digit that halts the progression.

It ain’t happenin’! Most calculators will give you the following ten digits and no more – 3.141592654. However, with those advanced computers? Some say pi calculations have reached 31 trillion digits.

Now for another acknowledgment to the day called today; which is secretly what we call every day. Today is a day to acknowledge the inexplicable progression and stability of all of creation, understanding that everything in the circle expands just enough to include what’s next to it. Today is a mere portion of time inextricably calculated into what some affectionately call eternity.

If this is the case then we must now bring in an acknowledgment of the Creator of the creation in which we exist. There is such an acknowledgment when we discover a Hebrew word references such a being. That appellation is Shaddai, meaning simply Almighty. It peculiarly has a numerical value of 314. It’s no coincidence, “today lovers;” it’s also worth further investigation. Shaddai comes from the root word that means breast, which comes from a deeper root wood, meaning to swell. The swelling of each individual digit makes for the associative presentation. Look it up.

GENESIS 28:3 KJV

May God Almighty [El Shaddai] bless you and make you fruitful and increase your numbers …

Oh, by the way, this pi day . . . This is the day that the Lord has made; let us rejoice and be glad in it. Psalm 118:24.

AND eat some pie maybe and begin to count, oh I don’t know … maybe your blessings.

Pi Day Today

Pi Day is now celebrated worldwide in schools, universities, and even workplaces. Activities range from pie-eating contests to memorization challenges, educational workshops, and fundraising events for STEM education. The Exploratorium continues to host an annual Pi Day event, keeping the original tradition alive.

🔢 HOW to Celebrate & Observe National Pi Day?

Not sure how to LOVE the day? We’ve got a few interesting ideas to consider that may help you get started.

Here are some activities you can do on National Pi Day!

💙 RAISE Social Awareness

Use social media posts with the hashtags #NationalPiDay, #PiDay, #Pi, #Math, #Mathematics, #SpecialInterestHolidays, #MarchHolidays, #Holiday, #FindADayToLOVE, #iHEARTdays to support the importance of celebrating, promoting, and sharing with the world why you ❤️ National Pi Day.

Future DATES for National PI Day

Year	Date	Day of the Week
2025	March 14	Friday
2026	March 14	Saturday
2027	March 14	Sunday
2028	March 14	Tuesday
2029	March 14	Wednesday

➰ Pi FAQ

WHEN is National Pi Day?

• National PI Day is an annual celebration held on March 14th each year.

When was Pi Day FIRST celebrated?

• National PI Day was first recognized in 1988 by physicist Larry Shaw at the Exploratorium in San Francisco.

Is Pi Day an OFFICIAL holiday?

• National PI Day is not a federal holiday, but 2009 the U.S. House of Representatives officially recognized March 14 as National Pi Day.

The Imp💜rtance of National PI Day

National PI Day is important because it highlights the significance of mathematics in everyday life. Pi (π) is a fundamental constant used in geometry, engineering, physics, and countless other fields. The day makes math more engaging, especially for students, by connecting it to fun activities like eating pie, solving puzzles, and memorizing digits of Pi.

It also helps us appreciate STEM (science, technology, engineering, and math) and encourages curiosity about numbers and problem-solving. Plus, it’s a great excuse to celebrate learning in a lighthearted way!

1. Making Math FUN

   Pi Day turns an abstract mathematical concept into something interactive and enjoyable. Whether through games, challenges, or just eating pie, it makes numbers feel less intimidating.

2. An Excuse to Eat PIE

   Let’s be honest — one of the biggest reasons we love Pi Day is the chance to enjoy a delicious slice of pie. Sweet or savory, it’s the perfect way to celebrate!

Enjoy A SLICE of Pi

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