March 16 , 2021
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- Pi is the ratio of a circle's circumference to its diameter.
- The value of Pi is 3.14 and the initial of the number is 3.
- Thus, it is observed in March as it is the third month in the annual calendar.
- The symbol of Pi was discovered by William Jones in the year 1706.
- The value of the Pi was first calculated by Mathematician, Archimedes of Syracuse.
- UNESCO started observing Pi Day as ‘International Day of Mathematics' from the year 2019.
- Pi Approximation Day is observed on July 22 (22/7 in the day/month format).
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