**In news**– Internationally, March 14 is celebrated as International Day of Mathematics or Pi Day as the date, which is written as 3/14 in many countries resembles the value of pi.

**About the International Day of Mathematics(Pi Day)-**

- Pi Day is celebrated on March 14 to celebrate the mathematical constant, Pi which happens to have one of the most recognisable mathematical symbols π.
- It is celebrated on this day since the date, when written in the format of month/day (3/14), matches the first three digits of the value of the mathematical constant.
**The theme for the 2022**International Day of Mathematics is*Mathematics Unites.*- March 14 2022 also marked the 143rd birth anniversary of Nobel Prize winning physicist Albert Einstein.
- The IDM project is
**led by the International Mathematical Union(IMU)**with the support of numerous international and regional organizations from all over the world. - IMU is an international non-governmental and non-profit scientific organization, with the purpose of promoting international cooperation in mathematics.
- It is a member of the International Science Council (ISC). IMU endorses ISC’s Principle of Freedom, Responsibility and Universality of Science.

**In November 2019, in its 40th General Conference, UNESCO, announced Pi Day as the International Day of Mathematics.****The first celebration was held on March 14, 2020.**

- It was mathematician Archimedes of Syracuse, born in 287 BC, who first calculated the value of the Pi.
- However, th
**e mathematical constant was popularized later when Swiss mathematician Leonhard Euler used the symbol of Pi in 1737.**

**The symbol for Pi has been in use for over two and a half centuries now. It also finds its place in Egyptian mythology.**

- People in ancient Egypt believed that the pyramids of Giza were built on the principles of pi.
- Pi also happens to be a unique Mathematical value as it represents the ratio of the circumference of any circle to its diameter.
- Most commonly the value of Pi is calculated up-to two decimal points, 3.14. However, given it is an irrational number, following the decimal point, the digits do continue to go on up to 70,000 decimal points.
**The value of Pi in fraction is 22/7.**

**India’s National Mathematics Day- **

- It is
**observed on December 22 to mark the birth anniversary of India’s famed mathematician Srinivasa Ramanujan.** - The
**day was first marked in 2012 by former prime minister Dr Manmohan Singh to commemorate Ramanujan’s 125th birth anniversary.** - From his childhood, he has had a huge passion for mathematics. So much so that at the age of 12, he had mastered trigonometry and developed many theorems on his own with no assistance.
**His breakthrough finally came in 1913, when Ramanujan wrote to G H Hardy.**- The British mathematician, on realising Ramanujan’s genius wrote back to him, invited him to London. Hardy then got Ramanujan into Trinity College, Cambridge and what began was a captivating saga of success.

**In 1917, Ramanujan was elected to be a member of the London Mathematical Society. In 1918, he also became a Fellow of the Royal Society, becoming the youngest person to achieve the feat.**

- The London weather and the poor eating habits slowly affecting the health of Ramanujan, and he breathed his last in Kumbakonam at an age of 32.

Source: The Indian Express