# Why is Pi Day celebrated today, 14 March?

MATHEMATICS ·

The current record for memorising decimals of the number Pi is held by Suresh Kumar Sharma from India, who was able to recite a total of 70,030 decimal places in 2015Sections

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MATHEMATICS ·

The current record for memorising decimals of the number Pi is held by Suresh Kumar Sharma from India, who was able to recite a total of 70,030 decimal places in 2015Isabel Méndez

Malaga

Tuesday, 14 March 2023, 11:28

In the international calendar of unusual events to celebrate, this Tuesday (14 March) is reserved for what is surely one of the** most popular mathematical concepts in the world**. It is the result obtained by dividing the circumference of a circle by its diameter. This quotient always results in the number Pi: 3.1416 in its short version, since this digit is irrational and therefore with an **infinite number of decimals**, of which more than 22 billion are currently known.

Because it is the date that joins the two best-known decimals of Pi and the way in which the day and month (3/14) are written in the **United States**, where this event originated. In fact, it was the **US House of Representatives** that approved the creation of this day in 2009, which also coincides with the** birth of the famous physicist Albert Einstein in 1879**.

The symbol with which -**π**- is represented is the **sixteenth letter of the Greek alphabet** as well as the first letter of the Greek word periphereia, a term used to designate the perimeter of a circle.

The **US space agency Nasa** uses 16 digits of Pi to calculate exact positions, and on **long-haul flights**, where planes make an arc of a circle, the route is calculated using the Pi number to optimise the trip and fuel.

It was first used by the **mathematician William Jones** in 1706 and later popularised by the grea**t mathematician and physicist Leonhard Euler**, around 1734, who was the first to work out its value. The symbol π was adopted three years later, in 1737. In 1988, **physicist Larry Shaw**, working at the **San Francisco Exploration Museum**, had the idea of promoting this anniversary.

The current record for memorising decimals of the number Pi is held by** Suresh Kumar Sharma **from India, who was able to recite a total of 70,030 decimal places in 2015. It took him more than 24 hours to do it.

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