Pi Day is celebrated annually to pay tribute to the essential mathematical constant pi. March 14 was chosen as the day to celebrate the constant as the first three digits of pi -- 3, 1 and 4 --represent the date. The day is celebrated by having some fresh-baked pie, with several restaurants offering deals.

The U.S. House of Representatives officially recognized the day in 2009 in order 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."

Here are some one-liners, jokes and memes to mark this day from Thought Catalog -

1. What did pi say to his partner? Stop being irrational.
2. Never talk to pi. He'll go on forever.
3. What do teachers from Georgia like to eat for dessert? Peach pi.
4. Why do teenagers travel in groups of 3 or 5? Because they can’t even.
5. What do you call a number that just can’t keep still? A roamin’ numeral.
6. If you ask a scientist what pi is, he'll tell you it equals 3.14159. If you ask a mathematician, he'll tell you pi equals the circumference of a circle divided by its diameter. If you ask an engineer, he'll say "Pi? Well, it's about 3, but we'll call it 4 just to be safe." But if you ask a kid, he’ll ask if he can have ice cream with it.
7. What do you get when you cut a jack-o'-lantern by its diameter? Pumpkin pi.
8. How many mathematicians does it take to change a light bulb? One—she just gives it to three physicists, thus reducing it to a problem that’s already been solved.
9. Why does algebra make you a better dancer? Because you can use algo-rhythm.
10. What’s the best place to do math homework? On a multiplication table.
11. Where do mathematicians like to party? In bar graphs.
12. Why is six afraid of seven? Because seven eight nine!
13. Why was the math book sad? Because it had so many problems.
14. Why should you never argue with decimals? Decimals always have a point.
15. Why did the student get upset when his teacher called him average? It was a ‘mean’ thing to say!
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