For math lovers around the world, March 14 is a holiday, "Pi Day." That's because the date — 3/14 — is also the beginning of the decimal expansion of the world's best-known irrational number: ...

Add Yahoo as a preferred source to see more of our stories on Google. Math students everywhere will be eating pies in class this week in celebration of what is known as Pi Day, the 14th day of the 3rd ...

Whether using 3.141 or the record-holding 314 trillion–digit calculation announced in December 2025 by Storage Review Lab director Kevin O'Brien, every representation of π is still an approximation.

Did you know there are holidays for almost everything? While the U.S. may have 11 official federal holidays, there are actually thousands of quirky, themed days that make the calendar a whole lot more ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. Pi Day is celebrated every year on March 14—when the date can be written as 3.14 in U.S. date format notation. While some ...

Many Americans write dates in numerical form, with the first digits for the month, the second for the day of the month, and the third for the year. The notation 3/14/15, for example, represents March ...

It might be the most exciting reason to celebrate and dig into any festive sweet or savory dessert that has a pie-shape look, as today is Pi Day, March 14. According to NationalCalendarDay.com, the ...

Add Yahoo as a preferred source to see more of our stories on Google. This number-themed day dates back to 1988, when physicist Larry Shaw decided to host a circle walk to honor the mathematical π ...