# Celebrating Square Root Day

Square Root Day is when the month and the day are the square root of the year. It only happens nine times in a century, and today (3-3-09) is one of those days.

The holiday is the brainchild of Sequoia High (Redwood City, California) driver education teacher Ron Gordon, who enjoys calendar quirks. He's tried to get schools to celebrate Square Root Day since 1981. Gordon also inspired a celebration of Odd Day on March 5, 2007 (3-5-7). He is giving away a prize of \$339 to the person who has the best Square Root Day celebratory event. What can you do to celebrate Square Root Day? Math teachers expect students to calculate square roots. We should do something fun in addition.

Robert X. Cringely at Infoworld has a plan for celebrating Square Root Day.

I don't know about you, but I'm planning to celebrate by watching a "SpongeBob SquarePants" marathon while playing with my slide rule.

That's only the beginning of the many ways you can celebrate Square Root Day.

The established custom is to cut root vegetables (carrots, turnips, radishes) into squares. Actually eating them may be asking too much. But potatoes are roots, aren't they? Square (or cubic) potatoes can mean only one thing -home fries.

For dessert you need to make a carrot cake. Square, of course. There are plenty of different recipes, all you have to do is find one that fits the ingredients you have. Enjoy it with some root beer. Oh yes, I'll have a slice, thank you very much!

Buy yourself a square root puzzle. You won't receive it in time to play today, but you'll be ready for the next holiday in 2016.

You can play Square Root Clock online. There are plenty of online games that challenge your math skills using square roots, but this is the most photogenic.

Then there's always a little square root poetry. This example is from Harold and Kumar Escape from Guantanamo Bay (contains spoiler, if you care).

After all the food and math, grab seven of your friends and have a square dance. Some basic instructions are at Square Dancing 101. Allemande left, 2 by 2! Image by Wikimedia user Deirdre.

If you are so inclined, you might go looking for a real square root in the world around you. They are kind of rare. Image by Flickr user arsheffield.

And if that's not enough fun for you, we're only a couple of weeks away from Pi Day! But celebrate Square Root Day wisely. The next such holiday will be on April 4, 2016.