# Topic: Pi Day

## Featured

• ### Get irrational: 3.14 things to do on Pi Day

March 14 is Pi Day, which celebrates the mathematical constant measuring the ratio of a circle's circumference to its diameter (beginning with 3.14). Pi Day is celebrated internationally, and in 2009 it was decreed an official holiday by the US House of Representatives. Here are 3.14 ways to celebrate.

## All Content

• ### Pi day: How to memorize the world's most famous irrational number

From images and stories to poems and songs, there are numerous ways to sharpen your memory and improve your retention span

• ### Modern Parenthood Pi Day: Great for math and tastebuds (+video)

Pi Day gives math fans a chance to celebrate the popular ratio, and foodies the chance to make a play on words and bake their favorite pies. When your family celebrates both, its the perfect equation for fun.

• ### Stir It Up! Pi Day: Serve up a slice of rich chocolate cream pie

Pi Day on March 14 is celebrated in all kinds of binary ways, but the sweetest approach is to measure that diameter across your favorite pie filling.

• ### Stir It Up! Pi Day: Celebrate with a vintage custard pie

Pi Day may be a good excuse to indulge in whipped cream and sugary fillings nestled in graham cracker crusts. Here's a vintage pie recipe that doesn't go overboard with sugar and is still a satisfying end to a good meal.

• ### Get irrational: 3.14 things to do on Pi Day

March 14 is Pi Day, which celebrates the mathematical constant measuring the ratio of a circle's circumference to its diameter (beginning with 3.14). Pi Day is celebrated internationally, and in 2009 it was decreed an official holiday by the US House of Representatives. Here are 3.14 ways to celebrate.

• ### What's big at Mobile World Congress 2013

New hardware, gadgets, and business partnerships are creating buzz at Mobile World Congress, and it's only day one.

• ### Pi Day: five fun facts about 3.14

March 14, or 3.14, is Pi Day. Get it? Pi Day celebrates all things related to the mathematical constant that measures the ratio of a circle's circumference to its diameter. Here are five things you should know about π.

• ### Pi Day: Why we celebrate 3.14...

Pi Day: March 14 is Pi Day, where celebrants contemplate the world's most famous irrational number. Or just eat some pie.

• ### Stir It Up! Pi Day: 14 recipes for pie

Pi Day: Why get stuck counting pi when you can dream about infinite pie?

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