In the End, we will remember not the words of our enemies, but the silence of our friends. Martin Luther King, Jr.

Three years after the Civil War ended, on May 5, 1868, the head of an organization of Union veterans — the Grand Army of the Republic (GAR) — established Decoration Day as a time for the nation to decorate the graves of the war dead with flowers. Maj. Gen. John A. Logan declared that Decoration Day should be observed on May 30. It is believed that date was chosen because flowers would be in bloom all over the country.

The first large observance was held that year at Arlington National Cemetery, across the Potomac River from Washington, D.C.

The ceremonies centered around the mourning-draped veranda of the Arlington mansion, once the home of Gen. Robert E. Lee. Various Washington officials, including Gen. and Mrs. Ulysses S. Grant, presided over the ceremonies. After speeches, children from the Soldiers’ and Sailors’ Orphan Home and members of the GAR made their way through the cemetery, strewing flowers on both Union and Confederate graves, reciting prayers and singing hymns.

By the end of the 19th century, Memorial Day ceremonies were being held on May 30 throughout the nation. State legislatures passed proclamations designating the day, and the Army and Navy adopted regulations for proper observance at their facilities.

It was not until after World War I, however, that the day was expanded to honor those who have died in all American wars. In 1971, Memorial Day was declared a national holiday by an act of Congress, though it is still often called Decoration Day. It was then also placed on the last Monday in May, as were some other federal holidays.

The origins of special services to honor those who die in war can be found in antiquity. The Athenian leader Pericles offered a tribute to the fallen heroes of the Peloponnesian War over 24 centuries ago that could be applied today to the 1.1 million Americans who have died in the nation’s wars: “Not only are they commemorated by columns and inscriptions, but there dwells also an unwritten memorial of them, graven not on stone but in the hearts of men.”

To ensure the sacrifices of America ’s fallen heroes are never forgotten, in December 2000, the U.S. Congress passed and the president signed into law “The National Moment of Remembrance Act,” P.L. 106-579, creating the White House Commission on the National Moment of Remembrance. The commission’s charter is to “encourage the people of the United States to give something back to their country, which provides them so much freedom and opportunity” by encouraging and coordinating commemorations in the United States of Memorial Day and the National Moment of Remembrance.

The National Moment of Remembrance encourages all Americans to pause wherever they are at 3 p.m. local time on Memorial Day for a minute of silence to remember and honor those who have died in service to the nation. As Moment of Remembrance founder Carmella LaSpada states: “It’s a way we can all help put the memorial back in Memorial Day.”