The first widely publicized observance of a Memorial Day-type observance after the Civil War was in Charleston, South Carolina, on May 1, 1865. During the war, Union soldiers who were prisoners of war had been held at the Hampton Park Race Course in Charleston; at least 257 Union prisoners died there and were hastily buried in unmarked graves.Together with teachers and missionaries, black residents of Charleston organized a May Day ceremony in 1865, which was covered by the New York Tribune and other national papers. The freedmen cleaned up and landscaped the burial ground, building an enclosure and an arch labeled "Martyrs of the Race Course". Nearly 10,000 people, mostly freedmen, gathered on May 1 to commemorate the war dead. Involved were about 3,000 school children, newly enrolled in freedmen's schools, as well as mutual aid societies, Union troops, black ministers and white northern missionaries. Most brought flowers to lay on the burial field.
David W. Blight described the day:
However, Blight stated he "has no evidence" that this event in Charleston inspired the establishment of Memorial Day across the country.