# Pi Day: How to Celebrate 3.14

Scientists, mathematicians, physicists and enthusiasts around the world are celebrating Pi Day, which annually falls on March 14. The number 3.14 is the universal numeral equivalent of Pi.

Pi Day was first celebrated in 1988 and planned by Larry Shaw. The numerals 3, 1, and 4 are the most important numbers in the Pi formula, which is a standard ratio for any circle's circumference to its diameter. The number 3.14 continues indefinitely, but the majority of people simply use the first three numbers.

People all around the world are celebrating Pi Day in their own ways. Some choose to eat actual pies, while others may simply engage in discussion or debates about the number 3.14, which includes over 10 trillion digits.

Twitter users are lighting up the boards with messages celebrating the day.

"Happy Pi day! (when I hear 'Pi' I reflexively think 3.14159) I think I took too much math," wrote Brad Nitz. Many are poking fun at themselves for celebrating a "nerdy" day.

"Happy Pi Day ya'll… 3.141579.. that's as far as I could memorize.. let's all solve at least one pi equation today!" challenged Kunle Ayegbusi.

Today is also Albert Einstein's birthday; the famed scientist would have been 133. He is the one of the founding fathers of science, physics and mathematics, giving the world their most famous formulas. The Maryland Science Center is celebrating both Pi Day and Einstein's birthday with several special events.

The Science Center invites all enthusiasts to participate in the celebration, which will include pie-eating contests, experiments, and singing "Happy Birthday" in Einstein's memory.

While Pi has been around for quite some time, the United States did not officially recognize Pi Day until 2009, when the House of Representatives issued a resolution recognizing March 14 as National Pi Day. If you are not able to attend a formal Pi celebration, invent one yourself.

Just remember that pies are round, and cakes are square.