Love Pi Day? You Can Thank San Francisco for That.

Tomorrow is Pi Day, the annual celebration of the ever-intriguing mathematical constant denoted by the Greek letter π. Children in math classes across America will soon be discussing the magic of a circle’s circumference and, perhaps more memorably, devouring delicious pies.The nerdy holiday, observed on March 14 because the first three digits of pi are 3, 1 and 4, has been recognized by the U.S. House of Representatives. And in 2019, UNESCO designated March 14 as the International Day of Mathematics.But years before all that, Pi Day was just a wacky tradition at a science museum in the…