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When is National Pi Day in 2024?

National Pi Day in 2024 is on the Thursday, 14th of Mar (3/14/2024).

National Pi Day is on the 74th day of 2024. There are 292 days left in the year.

National Pi Day Facts

  • Date: Mar 14, 2024
  • Fun
  • Also Called: Pi Day
  • Celebrations: Eating, Partying, Contests
National Pi Day iImage Credit: PixaBay.com

Pi (π) is a mathematical symbol representing the ratio of the circumference of a circle to its diameter. The ratio is approximated as 3.14, but it’s calculated to over one trillion digits beyond the decimal point. Pi (π) is a vital key in Mathematical geometry and equations. The surface area and perimeter of circular objects depend on the symbol for accurate results. Observed on March 14th, National Pi Day is an opportunity for Math enthusiasts to showcase their love for numbers. National Pi Day should however not be confused with Pi Approximation Day observed ion June 22nd or Two Pi Day marked on June 28th.

Who Invented Pi?

According to historians, the first person to calculate pi was Archimedes of Syracuse. He was one of the ancient Greek mathematicians of the world, and he lived in the 3rd century. Archimedes used the Pythagorean Theorem alongside two regular polygons to calculate the area of a circle. Archimedes approach was theoretical, and it showed that pi was between 3 1/7 and 3 1/10. The use of Pi was popularized in the 1700s by William Jones and Leonhard Euler.

History of National Pi Day

Pi (π) has a rich history. Various ancient civilizations have been linked to the calculation of the Pi (π). Among them are Egyptians and Babylonians. Babylonians determined the area of a circle by squaring the radius and then multiplying it by three. This gave a value of 3 which is a close approximation to pi. For the Egyptians, they would calculate the area of a circle by a formula that approximated pi as 3.1605.

Pi is also biblical. In the Old Testament, (1 Kings 7:23), a circular pool is said to be 30 cubits around and ten cubits wide. This again gives the value of pi as 3 or thereof.

The first records of National Pi Day are traced in 1988 in San Francisco. The day was meant to draw attention to the STEM fields (science, technology, engineering, and math.) The celebrations were organized by physicist Larry Shaw, who led the public in marching around circular spaces and consuming fruit pies.

On March 12, 2009, a non-binding resolution was passed by the US Congress where March 14th was officially recognized as the National Pi Day. The entire month of March is also observed as the National Pi month. The date was chosen since it coincides with the first three significant digits of pi which are 3, 1 and 4. Interestingly, Albert Einstein’s birthday also falls on March 14th.

How to Celebrate National Pi Day

You can observe National Pi Day by eating pies and other circular treats. Pi and pie are English homophones, and the coincidental circular form of pie makes it the best treat of the day.

If you love Mathematics, mark the day by holding a pi memorization contest with friends. Although pi can be calculated to infinite numbers, figure out who among your friends can recite most of the numbers as they follow each other. Google has a training app for the same to help you in the contest.

Another great way to mark this day is by celebrating Albert Einstein’s birthday. You can attend celebrations in Princeton, New Jersey where a major event to mark the pi day and Einstein’s birthday is held. Some of the Pi Day activities you can take part in during the event include dressing like the Nobel Prize winner. If declared the winner of the Einstein’s Look-Alike contest then you will be lucky to go home with a great award. The German-born theoretical physicist lived in Princeton for 20 years while working at one of the institutes there.

You can also dazzle your friends by posting a pi-themed trivia on social media. Remember to share with them the practical problems in real life that pi help us solve. Spread all this enthusiasm using the hashtag #NationalPiDay.

Interesting National Pi Day Fun Facts

- Pi (π) is the 16th digit of the Greek alphabet.

- In the 18th century, Pi (π) was proved to be an irrational number. This means that it is decimal representation is infinite and never repeats.

- Lu Chao from China holds the World Record for memorizing the first 67,890 digits of the Pi (π).

- Only the first 39 digits of Pi (π) are required to give an accurate answer of any Pi (π) mathematical problems.

National Pi Day Observances

  • Mon
  • Mar 14, 2022
  • Tue
  • Mar 14, 2023

List of National and Regional Public Holidays of United States in 2023

SundaySunJan 01, 2023Jan 01New Year's Day
MondayMonJan 02, 2023Jan 02New Year's Day Holiday
MondayMonJan 16, 2023Jan 16M L King Day
MondayMonFeb 20, 2023Feb 20Presidents' Day
FridayFriApr 07, 2023Apr 07Good Friday
SundaySunApr 09, 2023Apr 09Easter Sunday
MondayMonMay 29, 2023May 29Memorial Day
MondayMonJun 19, 2023Jun 19Juneteenth
TuesdayTueJul 04, 2023Jul 04Independence Day
MondayMonSep 04, 2023Sep 04Labor Day
MondayMonOct 09, 2023Oct 09Columbus Day
SaturdaySatNov 11, 2023Nov 11Veterans Day
ThursdayThuNov 23, 2023Nov 23Thanksgiving Day
MondayMonDec 25, 2023Dec 25Christmas

List of Popular Celebration Days of United States in 2023

ThursdayThuJan 12, 2023Jan 12National Pharmacists Day
ThursdayThuJan 19, 2023Jan 19National Popcorn Day
WednesdayWedFeb 01, 2023Feb 01National Signing Day
ThursdayThuFeb 02, 2023Feb 02Groundhog Day
FridayFriFeb 03, 2023Feb 03National Wear Red Day
ThursdayThuFeb 09, 2023Feb 09National Pizza Day
MondayMonFeb 13, 2023Feb 13Galentine's Day
TuesdayTueFeb 14, 2023Feb 14Valentine's Day
WednesdayWedFeb 15, 2023Feb 15National Bagel Day
SaturdaySatFeb 18, 2023Feb 18National Drink Wine Day
TuesdayTueFeb 21, 2023Feb 21National Pancake Day
WednesdayWedFeb 22, 2023Feb 22National Margarita Day
FridayFriMar 03, 2023Mar 03National Employee Appreciation Day
TuesdayTueMar 07, 2023Mar 07National Cereal Day
SundaySunMar 12, 2023Mar 12Daylight savings
MondayMonMar 13, 2023Mar 13National Napping Day
TuesdayTueMar 14, 2023Mar 14National Walkout Day
TuesdayTueMar 14, 2023Mar 14National Pi Day
MondayMonMar 20, 2023Mar 20National Proposal Day
ThursdayThuMar 23, 2023Mar 23National Puppy Day
ThursdayThuMar 30, 2023Mar 30National Doctor Day
WednesdayWedApr 05, 2023Apr 05National Walking Day
ThursdayThuApr 06, 2023Apr 06National Burrito Day
FridayFriApr 07, 2023Apr 07National Beer Day
TuesdayTueApr 11, 2023Apr 11National Pet Day
WednesdayWedApr 12, 2023Apr 12National Grilled Cheese Day
ThursdayThuMay 04, 2023May 04National Day Of Prayer
SundaySunMay 14, 2023May 14Mother's Day
ThursdayThuMay 25, 2023May 25National Towel Day
ThursdayThuMay 25, 2023May 25National Wine Day
FridayFriJun 02, 2023Jun 02National Donut Day
ThursdayThuJun 08, 2023Jun 08National Best Friends Day
SundaySunJun 18, 2023Jun 18Father's Day
WednesdayWedJun 21, 2023Jun 21National Selfie Day
ThursdayThuJun 22, 2023Jun 22National Kissing Day
TuesdayTueJul 11, 2023Jul 11Amazon Prime Day
ThursdayThuJul 13, 2023Jul 13National French Fry Day
FridayFriJul 14, 2023Jul 14National Nude Day
SundaySunJul 16, 2023Jul 16National Ice Cream Day
WednesdayWedJul 19, 2023Jul 19National Hot Dog Day
MondayMonJul 24, 2023Jul 24National Tequila Day
SaturdaySatJul 29, 2023Jul 29National Chicken Wing Day
TuesdayTueAug 01, 2023Aug 01National Girlfriends Day
SundaySunAug 06, 2023Aug 06National Sister Day
MondayMonSep 18, 2023Sep 18National Cheeseburger Day
TuesdayTueOct 03, 2023Oct 03National Boyfriends Day
WednesdayWedOct 04, 2023Oct 04National Vodka Day
WednesdayWedOct 04, 2023Oct 04National Taco Day
MondayMonOct 09, 2023Oct 09Leif Erikson Day
SaturdaySatOct 21, 2023Oct 21Sweetest Day
SundaySunOct 29, 2023Oct 29National Cat Day
TuesdayTueOct 31, 2023Oct 31Halloween
FridayFriNov 03, 2023Nov 03National Sandwich Day
FridayFriNov 24, 2023Nov 24Black Friday
MondayMonNov 27, 2023Nov 27Cyber Monday
SaturdaySatDec 02, 2023Dec 02Candle Day
SaturdaySatDec 09, 2023Dec 09National Pastry Day
FridayFriDec 15, 2023Dec 15National Ugly Sweater day