Pi Day is the annual celebration of the mathematical constant, Pi. Here's what to know about its date, and why we celebrate it by eating pie.

National Pi Day is recognized today in the U.S. and around the world. Here's what to know about the quirky holiday, and how to celebrate.

Thursday marks National Pi Day in the United States and around the world. The holiday commemorates a timeless symbol beloved by many in mathematical and scientific communities, while making the ...

The pi symbol isn't readily available on your iPhone's default keyboard, but there are tricks you can do to change that and have it available whenever you need.

It's Pi Day, and the world is celebrating more than just the Greek mathematical symbol (π). Retailers and restaurants everywhere have deals today. The folks at Offers.com have provided a list of ...

READ: What is Pi Day? Things to know about the holiday celebrating an iconic mathematical symbol Pi is the ratio of a circle's circumference to its diameter.

What’s Pi Day all about? Math, science, pies and more It’s also Albert Einstein’s birthday, making the pie eaten at Pi Day gatherings all the sweeter.

While Pi Day was only officially instated as a national holiday in 2009, the mathematical symbol, Pi, has been around for 4,000 years.

While Pi Day was only officially instated as a national holiday in 2009, the mathematical symbol, Pi, has been around for 4,000 years.