Today is Friday the 13th, the first of three in 2015. Check out some of the most common superstitions.
Today is Friday the 13th -- considered an unlucky day by the superstitious dating back to the 19th century. Check out some other common (but silly) superstitions:
Photo: U.S. Coast Guard
John Palminteri photo
Photo Courtesy: Mike Eliason / Santa Barbara Co. Fire Dept.
Photo by Justin Sullivan/Getty Images
Jason Kempin/Getty Images
Courtesy St. Ermin's
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Ralph Freso/Getty Images
iStock / Terraxplorer
Antenne Réunion/linfo.re via CNN
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Jim Rogash/Getty Images
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