1)

**Pi Day**and

**Pi Approximation Day**are two holidays held to celebrate the mathematical constant π (pi). Pi Day is observed on March 14, 3.14 being the first three digits of pi. It is also Albert Einstein's birthday. It can also be celebrated on March 4 (when 14% of the month of March has elapsed). Pi Approximation Day is observed on July 22, due to π being roughly equal to 22/7.

.....Pi Minute is also sometimes celebrated on March 14 at 1:59 p.m. If π is truncated to seven decimal places, it becomes 3.1415926, making March 14 at 1:59:26 p.m., Pi Second (or sometimes March 14, 1592 at 6:53:58 a.m.).

The Massachusetts Institute of Technology often mails out its acceptance letters to be delivered to prospective students on Pi Day.

2) Mikhail S Gorbachev becomes president of the Soviet Congress on 14th March,1990

3)Aamir Khan was born on this day.

4)Japan and Korea celebrate White Day similar to Valentine Day.

5)Besides many more significant events have happened on this date.