It’s Pi Day today, the celebration date of the number that is the ratio of a circle’s circumference to its diameter. It is held annually on 14 March, because 03/14 spells out the first three digits of π, or pi, which is 3.14.

However, this year is rather a special year, as this year is the first time in a century that the date is 03/14/15 (MM/DD/YY), which represents the first 5 digits of π : 3.1415. And at 09.26:53am, the date & time (03/14/15, 09:26:53) will represent the first 10 digits of π: 3.141592653. Rather interesting, right?

Checkout this amazing Pi clock!