# Pi Approximation Day Celebrated on 22 July Worldwide

Pi Approximation Day is celebrated worldwide on 22 July every year. The reason why this day is celebrated on 22 July is because of the value of Pi- 22/7.

Created On: Jul 22, 2013 13:05 ISTModified On: Jul 22, 2013 16:02 IST

22 July: Pi Approximation Day

Pi Approximation Day is celebrated worldwide on 22 July every year. The reason why this day is celebrated on 22 July is because of the value of Pi- 22/7. The fraction 22⁄7 is said to be the common approximation of Pi (π).

Objective of the Pi Approximation Day

Pi Approximation Day is observed or celebrated in order to mark the Pi or approximation of EMBED Equation- twenty two over seven, where the denominator 7 represents the 7th month, i.e., July and numerator 22 represents the 22nd day of the month.

Starting of the Pi Day

It is important to note that Pi Approximation Day is very closely related to the Pi Day which is celebrated on 14 March every year (representing the value 3.14). The Pi Day started in the year 1988. The first party for honouring this mathematical entity- Pi, was held in 1988 when Larry Shaw, a physicist at the Exploratorium, the San Francisco science museum revealed that the date was 14 March, i.e., number of the Pi (3.14). In the year 2009, the United States House of Representatives also supported the designation of Pi Day.

What is a Pi (π)?

• Pi is the ratio of circumference of a circle divided by the distance across the circle, i.e., diameter of the circle.
• The value of Pi is 22/7 or 3.14. Pi is an irrational number, which means that it is not possible to calculate Pi by dividing an integer by any other integer.
• Pi is a never-ending and never-repeating number.
• The most accurate calculation of Pi is to ten trillion digits.

Observance of the Day

Pi Approximation Day is observed in a lot of ways, which include eating a pie and discussion of the significance of number π. Various schools also hold competitions in order to find out which student recalls Pi to its highest number of decimal places.

Apart from this, there are recitation contests as well as annual Einstein look-alike contests in certain schools and universities.

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