March 14 (3/14) is the day we celebrate the mathematical constant pi — 3.14. In honor of the holiday, restaurants across the country offer deals and freebies on pizza and pie.

Happy Pi Day 2025! Wohoo! That’s right, it’s March 14, which can be written as 3/14, which also happens to be the first three digits of pi (3.14!). And while there are plenty of ways to ...

Celebrate Pi Day (3.14) this March 14 with some extra laughs.

Pi Day is celebrated every year on March 14 because the date aligns with the first three digits of pi – 3.14. In 2025, Pi Day falls on a Friday. Stream NBC4 newscasts for free right here, right now.