The last scheduled day for induction into the military by the Selective Service System. Due to the fact that President Richard Nixon declared this day a national day of mourning due to former President Harry S Truman's death, approximately 300 men were not able to report due to most Federal offices being closed. Since the draft was not resumed in 1973, they were never drafted.

The Selective Service System (SSS) is an independent agency of the United States government that maintains a database of registered male U.S. citizens and other U.S. residents potentially subject to military conscription.

Richard Milhous Nixon was the 37th president of the United States, serving from 1969 until his resignation in 1974. A member of the Republican Party, he represented California in both houses of the United States Congress before serving as the 36th vice president under President Dwight D. Eisenhower from 1953 to 1961. His presidency saw the reduction of U.S. involvement in the Vietnam War, détente with the Soviet Union and China, the Apollo 11 Moon landing, and the establishment of the Environmental Protection Agency and Occupational Safety and Health Administration. Nixon's second term ended early when he became the only U.S. president to resign from office, as a result of the Watergate scandal.

Harry S. Truman was the 33rd president of the United States, serving from 1945 to 1953. As the 34th vice president in 1945, he assumed the presidency upon the death of Franklin D. Roosevelt that year. Subsequently, Truman implemented the Marshall Plan in the aftermath of World War II to rebuild the economy of Western Europe, and established both the Truman Doctrine and NATO to contain the expansion of Soviet communism. A member of the Democratic Party, he proposed numerous New Deal coalition liberal domestic reforms, but few were enacted by the conservative coalition that dominated the United States Congress.

December 28 is the 362nd day of the year in the Gregorian calendar; three days remain until the end of the year.