"Pi Day is just a fake holiday created by math companies to sell more math” is a jocular saying that has been printed on many images. Pi Day is March 14th (3/14), just as Pi is “3.14.” No one is selling math, but it’s often said that other holidays such as Valentine’s Day and Mother’s Day were created by florists and greeting card companies.

“#PI day is just a holiday made up by the math companies to sell more math” was posted on Twetter by Tannerthanyou on March 15, 2013. “Pi Day is just a fake holiday created by math companies to sell more math” was posted on Twitter by Frankie Zelnick on March 14, 2015. “Pi Day is just a fake holiday created by math companies to sell more math” was posted on Twitter by Frankie Zelnick on March 14, 2016.

“Pi Day is just a fake holiday created by math companies to sell more math” was posted on Twitter by Frankie Zelnick—again—on March 13, 2017. This tweet went viral and received over 26,500 likes.

Wikipedia: Pi

The number π ( /paɪ/; spelled out as ”*pi*“ ) is a mathematical constant, approximately equal to 3.14159. It is defined in Euclidean geometry[a] as the ratio of a circle’s circumference to its diameter, and also has various equivalent definitions. It appears in many formulas in all areas of mathematics and physics.

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In the United States, Pi Day falls on 14 March (written 3/14 in the US style), and is popular among students.

Twetter

Tannerthanyou

@pkatanner

#PI day is just a holiday made up by the math companies to sell more math

11:12 AM · Mar 15, 2013·Twitter Web Client

Twitter

Frankie Zelnick

@phranqueigh

Pi Day is just a fake holiday created by math companies to sell more math.

9:12 AM · Mar 14, 2015·Twitter for iPhone

Twitter

Ryan

@27backspace

Pi Day’s just a holiday invented by big businesses to sell more math.

2:40 PM · Mar 14, 2015·Twitter for Android

Twitter

Frankie Zelnick

@phranqueigh

Pi Day is just a fake holiday created by math companies to sell more math.

12:04 PM · Mar 14, 2016·Twitter for iPhone

Twitter

Frankie Zelnick

@phranqueigh

Pi Day is just a fake holiday created by math companies to sell more math.

8:46 PM · Mar 13, 2017·Twitter Web Client

Twitter

Winnipeg Comedy Festival

@WpgComFest

Happy Pi Day! Also known as the holiday created by @Hallmark to sell more Math… #Math #MoreMath #ARoundOfMath #MathForEveryone! #PiDay #NotPieDay #MmmmmPieDay…

2:35 PM · Mar 14, 2018·Twitter for Android

Google Books

*Pi Day Is Just a Fake Holiday Invented by Math Companies to Sell More Math*

Big Math Shill - 6 X 9 100 Lined Page Journal

By Faculty Loungers · 2019

Reddit—Conspiracy

Crossposted by u/question_johndoe March 14, 2019

Pi day is a fake holiday created by math company’s to sell more math

Reddit—Teenagers

Posted by u/Raice19 March 15, 2019

Pi day is a hoax funded by math corporations to sell more math

That is all

Twitter

❄️ L…Mower 💎

@lisamower30

Pi Day is just a fake holiday created by math companies to sell more math.

10:55 AM · Mar 14, 2022·Twitter for iPhone

Twitter

Bob Kostic

@causticbob

#PiDay is just a fake holiday created by math companies to sell more math.

6:55 PM · Mar 14, 2022·Twitter Web App