All-Purpose’s three locations—pizzerias in Shaw and Navy Yard, and a snug spinoff in Bethesda—will offer Pi Day specials.

The home, known as the “pie house” for its slender cutout that resembles a slice of pie, sold for its asking price of $350,000 back in October, just over a month after it was listed for sale ...

Pi isn’t just a term you see in math problems. It’s a special number with its own unique day. Pi Day is celebrated every year ...