Today marks the 28th celebration of Pi Day in honor of the useful, irrational and never ending number 3.14.
Pi, which is used in architecture and construction, among other things, is the ratio of the circumference of a circle to its diameter.
According to Piday.org, “Pi has been calculated to over one trillion digits beyond its decimal point. As an irrational and transcendental number, it will continue infinitely without repetition or pattern. While only a handful of digits are needed for typical calculations, Pi’s infinite nature makes it a fun challenge to memorize, and to computationally calculate more and more digits.”
While Pi has been known for thousands of years, it has only been named after the Greek letter since the 1700s, according to the website.
The first Pi Day was celebrated on March 14, 1988, and was started by San Francisco’s Exploratorium science museum, which will mark the day with a daylong celebration including a parade, and of course, pie.
March 14 is also the birthday of famed physicist Albert Einstein, and there will be Pi Day festivities at Princeton University where he lived for many years.