Pi Day is almost here but let's face it, we all learned about Pi in high school but do we really remember anything about it? Fear not because every year, Pi Day celebrates the mathematical constant.



First of all, what is Pi?



According Pi Day's official web site, "Pi (Greek letter " P ") is the symbol used in mathematics to represent a constant -- the ratio of the circumference of a circle to its diameter -- which is approximately 3.14159. ...Pi is a constant number, meaning that for all circles of any size, Pi will be the same." Got it? Now the fun stuff...

What is Pi Day?



Pi Day is celebrated annually on March 14 aka 3/14 which is akin to Pi's 3.14159. Celebrations on the day of observance also commemorate Albert Einstein's birthday, which is also March 14.



What can we do on Pi Day?



Pi Day's site suggests we check out these "Pi-approved" pie recipes. There probably won't be any shame in picking up a pie, however, from any of these New Jersey bakeries.



Pi Day in Princeton

As is the case every year, there's some fun Pi Day events planned troughout Princeton, where Einstein hung his hat for a great part of his life. Among the events are:

Monday

The "Nerd Herd Smart Phone Grub Crawl" kicks off at noon and 6:30 p.m. from 10 Palmer Square inside the Nassau Inn. Check in at the Nassau Inn Lobby to receive the official Pi Day Princeton glasses and Smart Phone Grub Crawl route.



Noon - Starting at noon the Princeton School Gardens Cooperative Fundraiser - Treat yourself through 6 p.m. to a LiLLiPiE topped with bent spoon ice cream. All proceeds are donated directly to the Princeton School Gardens Co-op.



Also be sure to check out these special Pi Day deals from local Princeton merchants. For a complete listing of all the Pi Day events, click here.

Staying in? Watch these

Why not watch Darren Aronofsky's trippy "Pi" or Ang Lee's sweeping "Life of Pi." Both are available to stream on Amazon Prime.

Solve some math problems

Philly.com reports that Pizza Hut is getting in on the Pi Day fun. The pizza chain is enlisting Princeton's Professor Emeritus John H. Conway to concoct math problems that could give some lucky winners free pizza for 3.14 years. Visit the Pizza Hut blog 8 a.m. Monday to check out the problems.

Eat some cheap pizza

Blaze Fast-Fire'd Pizza, the fast-casual pizza chain celebrates Pi Day by inviting guests to build their own artisanal pizzas for just $3.14 each at any Blaze Pizza location. To find your local Blaze, click here.

Google remembers Pi

Also feel free to check out Google's Doodle from March 14, 2010.

Anthony Venutolo may be reached at avenutolo@njadvancemedia.com. Follow him on Twitter @AnthonyVenutolo and Google+. Find NJ.com on Facebook.