Today is Cinco de Mayo. And this year, the fifth of May is filled with mathematical joy. It is — Square Root Day! It all started in 1981. "I was writing a check in late August," says Ron Gordon, who ...

REDWOOD CITY, Calif. (KGO) -- In case you didn't know it, Monday is Square Root Day. It's 4-4-16. As you'll take note, both the day and month are the square root of the last two digits of the year.

Square Root Day — an event that occurs only nine times in a century — was celebrated with a variety of math activities this week at the St. Augustine Elementary School gym. Square Root Day is an ...