Thursday, April 16, 2015 was officially National High Five Day. The organization, known as National High Five, began this friendly tradition in 2002 when college-age students handed out free lemonade and, of course, high-fives at the University of Virginia. Now, it’s a national holiday celebrated by giving out high-fives to anyone and everyone every year on the third Thursday in April. This year participants were able to document their epic gestures through the trending Twitter #NH5D.