User blog comment:Wolf-gangs/April Fools' Party is back!/@comment-86.147.212.41-20120331100003/@comment-4500149-20120404035012

April Fools' Party: 2006- Red 2007- Blue 2008- Red 2009- Blue 2010- Red 2011- Purple 2012- Blue The oldest cap is currently the green one, which was released at the Festival of Flight back in 2009. So the red one is the second oldest. :)