Hey nerds! Today's the day to celebrate all things circular, especially if they come with a crust. No surprise: You can find deals on pizza and pie throughout the area. Here's where:

The South Side classico pizza at the District of Pi. (Photo by Bill O'Leary/The Washington Post)

1. Today is the biggest day of the year at District of Pi, where there's a digit-recitation contest (see Tim Carman's post on that here). Since you probably won't beat Siva Natarajan's attempt at 4,000 digits of pi, you might as well just eat and drink. If you buy one large pizza, you get the second for $3.14. Drink Schlafly Pi Common beer for $3.14, too. And if today is your birthday and you can prove it with a government ID, Pi will give you a free large pizza.

2. D.C.'s best-known pie purveyors are bringing back their annual Pi Day deal: Dangerously Delicious Pies will sell you a slice for $3.14 at all of their locations from 5 to 7 p.m.

3. Another math-themed pizzeria,  Radius Pizza, will be selling oversized slices for $3.14 beginning at noon.

.14. Over at Bayou Bakery, apple almond crunch pie is the deal of the day, at $3.14 per slice.

See any more deals? Let us know at goingoutguide@washpost.com, and we'll add them, along with more digits of pi.