Sometimes it is celebrated on March 14 at 1:59 p.m. (commonly known as "Pi Minute"); if Pi is rounded out to five decimal places, it becomes 3.14159, making March 14 at 1:59:26 p.m. being "Pi Second".
March 14 happens to be Einstein's birthday.
Massachusetts Institute of Technology often mails out its acceptance letters to be delivered to prospective students on Pi Day.
Some also enjoy celebrating "Pi Approximation Day" which can fall on any of several dates:
March 14: A common approximation for Pi (3.14)
February 27: The Earth is estimated to have traveled 1 radian of its orbit since the New Year
July 22: 22/7 in the majority of date formats, an ancient approximation of pi
November 10: The 314th day of the year (on leap years the 9th)
December 21 @ 1:13 p.m.: The 355th day of the year (on leap years, the 20th), celebrated at 1:13 for the Chinese approximation 335/113 Pi
What is Pi?
- Greek letter (π), is the symbol for the ratio of the circumference of a circle to its diameter.
- approximately 22/7 and is usually calculated to 3 digits, 3.14.
- With the use of computers, Pi has been calculated to over 1 trillion digits past the decimal.
- An irrational number meaning it will continue infinitely without repeating.
- The symbol for pi, , was first used in 1737 by William Jones, but was popular after it was adopted by the Swiss mathematician Leonhard Euler in 1737.
Excerpts from: http://www.piday.org/index.php & http://en.wikipedia.org/wiki/Pi_day
It is impossible for me to think of Pi without thinking about you, 3gu!! We miss ya! And your memory + passion with the number of:3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679 8214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196 4428810975665933446128475648233786783165271201909145648566923460348610454326648213393607260249141273 7245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094 3305727036575959195309218611738193261179310511854807446237996274956735188575272489122793818301194912 9833673362440656643086021394946395224737190702179860943702770539217176293176752384674818467669405132 0005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235 4201995611212902196086403441815981362977477130996051870721134999999837297804995105973173281609631859 5024459455346908302642522308253344685035261931188171010003137838752886587533208381420617177669147303 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