All math-lovers have a special occasion today – a magical once-in-a-century Pi Day. It’s an international day which honors one of the most recognizable mathematical irrational symbols – “pi” or “π,” proving once again that math can be fun.

This Saturday, March 14,

2015 is 3/14/15 in the US date format which corresponds to the

first digits of a mathematical constant Pi: 3.1415. The best time

to enjoy all the ‘irritability’ of today’s day is to celebrate it

at 9:26 and 53 seconds, morning and evening as then the time

matches with all 10 digits of Pi: 3.141592653.

The holiday happens once in 100 years and the true fans of Pi

should really savor the moment as the next time it happens will

be in 2115. For the admirers of general theory of relativity it’s

also an occasion to celebrate Albert Einstein’s birthday, which

is also March 14.

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Happy pi day pic.twitter.com/dnIiBm2Qlw

— O to the M to the G (@AnaBM_00) March

14, 2015

*“It’s the Pi Day of the century,”* Michael Breen, public

awareness officer at the American Mathematical Society, told The

Boston Globe. *“There’s a lot going on to celebrate.”*

According to University of California Berkeley mathematician and

author Edward Frenkel, Pi is special as *“it’s a portal into
this magical mysterious world of mathematics.”*

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Happy Pi Day from CuCPS! #PiDay2015pic.twitter.com/C2UINPNjvs

— Cumberland Schools (@CuCPS) March 14,

2015

One special feature of Pi, which is the constant used to

calculate the area of a circle, is that it is irrational so its

digits never end or repeat. Pi number was also put to use for the

construction of the ancient pyramid of Giza in Egypt.

*“We cannot change it. It’s not subject to opinion or taste or
time,”* Frenkel said.

*“How many things like this in the*

universe mean the same thing to everyone through time and

space?”

universe mean the same thing to everyone through time and

space?”

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Today is 14.3.15, or written as 3.14.15. Pi= 3.1415 So today is

therefore the once in a century Pi Day! #PiDay#geekpic.twitter.com/1JcsS64s6G

— Porto Lounge (@Porto_Lounge) March

14, 2015

Some math enthusiasts want to pay tribute to one of the most

enigmatic numbers in the Queen of Science by eating pies.

*“It’s humorous, it’s a lot of fun, and people obviously enjoy
eating pie,”* Tom Gaudette, principal academic evangelist at

MathWorks in Natick, MA.

*“For me, next year won’t be as*

important.”

important.”

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Pi Day in #ETZ15 will be

different. Come to join us on March 14th,2015 (3.14.15)

@IsilBoy @hakanatas #edtech#egtpic.twitter.com/Q4bnQIRWKj

— ugur mert (@ugur72) March 6,

2015

*“It’s a real exciting moment for math enthusiasm,”* said

Nathan Kaplan, a Yale University math professor, who called it a

time for people to *“remember how much fun they found some of
the stuff in school.”*

Pi Day celebrations are held or planned today all around the

globe. The events are arranged across the US, including New York,

San Francisco, Chicago and Los Angeles.

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Journée du #PI(π): #PiTime du

#PiDay

ne se reproduira qu’en 2115↓↓↓#PiDay2015#maths#mathematics#Einstein#Humourpic.twitter.com/yYKCVyDrPw

— El Cón Dort ! (@El_Con_Dort) March

14, 2015

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Happy #PiDay!

pic.twitter.com/hnQN4lqPR0

— 9GAG (@9GAG) March 14,

2015

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It’s Pi Day today! Why March 14, 2015 is a special day #PiDayhttp://t.co/KTP2UvI4IBpic.twitter.com/eN0IY7o5gv

— The York Roast Co. (@TheYorkRoastCo) March

14, 2015

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Happy #PiDay! We

know it may seem irrational to celebrate in Australia but then

again, it is an irrational number! pic.twitter.com/llIOjCU6Sf

— Intel Australia/NZ (@Intelanz) March

14, 2015

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Happy #PiDay@pewdiepie pic.twitter.com/lkNwNzIuma

— Edward Arends (@E_J_H_A_) March

14, 2015

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Happy pi day #mcmerlinpic.twitter.com/LFa2I2Fyzi

— Nicholas Jakic (@MCMERLIN13) March

14, 2015

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Today is Pi Day! pic.twitter.com/aofBKA4eg2

— Jelena Jovanovic (@Miss_Cybernaut) March

14, 2015

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Wishing you and yours a glorious Pi day. pic.twitter.com/k1Dcw0nprh

— Chris Raymond (@PEZcjr) March

14, 2015

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Ultimate Pi Day and @jenqueary‘s 18th birthday!

Love you girl! pic.twitter.com/ItmKTt7JBZ

— Tina Queary (@TinaQueary) March

14, 2015