Pi Day

What Is Pi Day?

Every year on March 14th, the world celebrates "Pi Day," named for the approximate value of pi, 3.14. The celebration began in 1988, when American physicist Larry Shaw celebrated the day at the Exploratorium science museum in San Francisco. In 2009, the U.S. House of Representatives officially recognized it as a national observance. Pi Day is an international celebration of the beauty and fun of mathematics, encouraging interest in science.

The Facts Behind an Infinitely Mysterious Number

Pi is a number that has fascinated humanity for thousands of years.

• An irrational and transcendental number: Pi is an "irrational number" -- its decimal digits continue infinitely without repeating -- and a "transcendental number," meaning it can never be the solution to any polynomial equation with integer coefficients. This endless quality is often seen as symbolic of the infinite nature of the universe.
• A long history of calculation: Calculations of pi date back to ancient Babylon and Egypt. Today, supercomputers have calculated it to more than 100 trillion digits.

Interesting Facts About Pi

• Einstein's birthday: March 14th is also the birthday of physicist Albert Einstein -- and, remarkably, the date physicist Stephen Hawking passed away in 2018, a striking coincidence in the world of science.
• Memorization records: Some people compete to memorize as many digits of pi as possible -- one Japanese man unofficially recited more than 100,000 digits from memory.
• International Day of Mathematics: In 2019, UNESCO officially declared March 14th as "International Day of Mathematics."
• The music of pi: Composers have assigned musical notes to each digit of pi, creating "Pi songs" with surprisingly captivating melodies.
• Pi in literature: "Pilish" is a style of writing in which the number of letters in each word follows the digits of pi (3, 1, 4, 1, 5...) -- and entire novels have been written in this constrained style.

Endless Curiosity Opens New Horizons

Pi Day is a chance to reflect on the infinite, complex laws of the universe hidden within something as simple as a circle. Just as pi's digits never end no matter how far you calculate, human imagination and potential have no limits either. Today, take a moment to notice the round objects around you and appreciate the beauty of perfect balance. Continuing to engage with questions that don't have a single answer is what makes life a deeper, more intellectually rich adventure.

Ideas for Celebrating Pi Day

• Share a round apple pie or pizza, and enjoy it together while appreciating the wonder of pi
• Search online to find out at what position in pi's digits your birthday or another meaningful number appears
• Spend 3 minutes and 14 seconds in quiet reading or meditation, feeling the rhythm of an endlessly repeating number and calming your mind
• Attend a math event at a science museum or university and discover the grand stories behind the equations

Perfect Harmony Guides You Toward a Fulfilling Future

March 14th is a day when your efforts come together smoothly, like a circle, creating wonderful harmony. Just as pi continues infinitely, may your curiosity never run dry, opening door after door to new knowledge. May today be filled with intellectual excitement and the kind of happiness that, like pi, simply can't be divided into neat numbers!