On Saturday April 7th 2012, there will be massive pillow fights in cities around the world!
http://www.pillowfightday.com/
Use this site to locate the nearest one. If you would like to learn how to organize a pillow fight, read the howto guide. Organizers, add your event! Check out the list of cities that participated in 2008, 2009, 2010, and 2011. Learn more about the urban playground movement.