Memorial Day is a United States federal holiday observed on the last Monday of May (May 31 in 2010). Formerly known as Decoration Day, it commemorates U.S. men and women who died while in the military service.^[1] First enacted to honor Union soldiers of the American Civil War (it is celebrated near the day of reunification after the Civil War), it was expanded after World War I.

Many people observe this holiday by visiting cemeteries and memorials. A national moment of remembrance takes place at 3 p.m. local time. Another tradition is to fly the flag of the United States at half-staff from dawn until noon local time. Volunteers often place American flags on each grave site at National Cemeteries.

(... from Wikipedia on 2010-03-05 12:11:25 )