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Chicago River Dyed Green In St. Patrick's Day Tradition

CHICAGO, IL - MARCH 16: A man dressed as a leprechaun entertains the crowd on a water propelled Flyboard while workers dye the Chicago River green to kick off the city's St. Patrick's day celebration on March 16, 2013 in Chicago, Illinois. The dying of the river has been a tradition in the city for 43 years. (Photo by Scott Olson/Getty Images)

St. Patrick's Day 2013

St. Patrick's Day is celebrated around the world, and even in space this year, on March 17.