César Chávez's birthday

César Chávez's birthday (a festival used in some American States around March 31)

class, named holiday in part of the United States

Class
named holiday in part of the United States
Examples
March 31st 2013, March 31st 2012, March 31st 2011, March 31st 2010, March 31st 2009,  …
Parent Class
holiday in some parts of the United States
Wikipedia Page
http://en.wikipedia.org/wiki/César_Chávez_Day
Distinct From
Thanksgiving, Memorial Day, Inauguration Day, Labor Day, Columbus Day,  …