On the 14th day of the third month, we celebrate National Pi Day!
We're not talking about apple pie or pizza pies here.
3, 1 and 4 are the first digits of the number pi — a mathematical constant represented by the Greek letter pi. It's the ratio of a circle's circumference to its diameter.
According to NationalDayCalendar.com, the first major observance of Pi Day was in 1988 at the San Francisco Exploratorium.
You can watch the complete Today's Talker above.
