>According to Wikipedia: “[T]he first memorial day was observed by liberated slaves at the Washington Race Course (today the location of Hampton Park) in Charleston, South Carolina. The race course had been used as a temporary Confederate prison camp in 1865 as well as a mass grave for Union soldiers who died there. Immediately after the cessation of hostilities, freed slaves exhumed the bodies from the mass grave and reinterred them properly with individual graves. They built a fence around the graveyard with an entry arch and declared it a Union graveyard. The work was completed in only ten days. On May 1, 1865, the Charleston newspaper reported that a crowd of up to ten thousand, mainly black residents, including 2800 children, processed to the location for a celebration which included sermons, singing, and a picnic on the grounds, thereby creating the first Decoration Day.”