December 7 is Pearl Harbor Remembrance Day. This holiday commemorates the anniversary of the attack on Pearl Harbor on December 7, 1941 that prompted the U.S. entry into World War 2, as well as the courage and sacrifice of all those affected by the attack in that pivotal moment of our history. For more information on the holiday, please read this article by the National Parks Service, which also details some of the commemorative events being held in honor of the holiday: http://www.nps.gov/.../national-pearl-harbor-remembrance...
Original source can be found here.