While this mathematical constant never repeats itself, Pi Day comes full circle once a year on March 14. Also marking Albert Einstein’s birthday, Pi Day is the day that gives every math lover an excuse to increase their circumference with endless amounts of pi-inspired pie.

I love Pi Day! This Apple Pi Pie recipe is from the #NerdyNummiesCookbook! 🍏💕 #PiDay #NationalPiDay #Pi pic.twitter.com/XsWy9wciKZ

— Rosanna Pansino (@RosannaPansino) March 14, 2016

If you want to celebrate in a more savory way, Pizza Hut is offering a way to make this Pi Day a bit more satisfying with a chance to win free pizza pies for those who can solve one of their three puzzling math problems.

For all you math lovers out there, indulge in these sweet pi memes:

Let the #PiDay games begin pic.twitter.com/w4ifc3j8OJ

— Rami (@Ramisms) March 14, 2016

If you understand this, you realize just how important this day is.

International Pi day! https://t.co/7fmjfnZLHQ pic.twitter.com/frEbBlPNau

— 9GAG ❤️ Memeland (@9GAG) March 14, 2016

And if you aren’t as nerdy as the rest of us, here’s how to understand pi in less time than it takes to say 3.14159265.

Pi is one of the most important numbers in the Universe https://t.co/wvwpvzl4vP#PiDayhttps://t.co/Mu0QZq7e9o

— BBC Earth (@BBCEarth) March 14, 2016

So, in honor of Einstein’s 137th birthday, grab a fork and indulge in an endless plate of pie. After all, this irrational excuse only works once a year.

Happy #PiDay and happy birthday, @AlbertEinstein. pic.twitter.com/H6TI0k42mY

— Brian Greene (@bgreene) March 14, 2016