The custom of strewing flowers on the graves of fallen soldiers has innumerable founders, going back perhaps beyond the horizon of recorded history, perhaps as far as war itself. But there is the ancient practice and there is Memorial Day, the specific holiday, arising from an order for the annual decoration of graves that was delivered in 1868 by Maj. Gen. John A. Logan, the commander in chief of the Grand Army of the Republic, a group made up of Union veterans of the Civil War.

According to the United States Department of Veterans Affairs, roughly two dozen places claim to be the primary source of the holiday, an assertion found on plaques, on Web sites and in the dogged avowals of local historians across the country.

Yet each town seems to have different criteria: whether its ceremony was in fact the earliest to honor Civil War dead, or the first one that General Logan heard about, or the first one that conceived of a national, recurring day.