The world celebrates Pi Approximation Day every year on 22 July. The fraction 22/7 is an approximate value of Pi, and it is for this reason that this day is commemorated on July 22. In this case, the numerator 22 represents the date, while the numerator seven represents the month.
The number, ‘Pi,’ is defined as the circumference to diameter ratio of a circle and is approximately equal to 3.14159. If you plug the numbers into your calculator, you’ll notice that 22 divided by 7 provides an infinite variety of answers. The digits continue indefinitely. That is why Pi is regarded as an approximation, and therefore the rationale for today.