Math nerds everywhere, rejoice: It's Pi Day, so called because the date can be written as 3/14. Students, teachers and number lovers will spend Monday celebrating the first three digits of pi, a mathematical constant that represents the ratio of circumference to diameter. In truth, pi has more than 1 trillion digits.

Pi Day was officially recognized by the United States House of Representatives in 2009 to help the country "reinforce mathematics and science education for all students in order to better prepare our children for the future and in order to compete in a 21st Century economy." Plus, it's just funny.

You can spend the day eating actual dessert pie or completing math homework. No matter what you do, though, don't forget the word problems — aka jokes. Here are a few of our favorites, collected from Thought Catalog, mathjokes4mathyfolks, BuzzFeed and mytowntutors:

3.14 percent of sailors are pi-rates.

Who invented the Round Table? Sir Cumference.

What's the official animal of Pi Day? The pi-thon.

How can I know so many digits of pi and so few digits of your phone number?

Who led mathematicians out of Hamelin? The pi-ed pi-per!

Why was the student upset after his teacher called him average? He thought it was a mean thing to say.

Why are diapers like 100 dollar bills? They always need to be changed.

What piece of clothing does the mermaid wear? An algae-bra.

What do you get when you cut a jack-o'-lantern by its diameter? Pumpkin pi.

What is the first derivative of a cow? Prime rib.

You should never talk to pi ... he goes on forever.

How far can you recite pi? Apple, cherry, blueberry, pecan, peach ...

What did pi say to his partner? Stop being irrational.

Why couldn’t the angle get a loan? His parents wouldn’t cosine.

What did one math book say to the other? Don't bother me. I have my own problems.

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