April 9

April 9 is the 100th day of the year, and the American record for it runs from 1784 to 1981 — a span of 197 years. The entry that anchors it: American Civil War, 1865.

The revolutionary generation left its own mark on the date. In 1784, the Treaty of Paris, ratified by the United States Congress on January 14, 1784, is ratified by King George III of the Kingdom of Great Britain, ending the American Revolutionary War. Copies of the ratified documents are exchanged on May 12, 1784.

The antebellum decades brought the date closer to the country’s central argument. In 1865, American Civil War — Robert E. Lee surrenders the Army of Northern Virginia (26,765 troops) to Ulysses S. Grant at Appomattox Court House, Virginia, effectively ending the war.

The early twentieth century brought industry, air travel and war to the date. In 1909, the U.S. Congress passes the Payne–Aldrich Tariff Act. Then, in 1939, after being denied permission to perform at Constitution Hall by the Daughters of the American Revolution, African-American singer Marian Anderson gave an open-air concert on the steps of the Lincoln Memorial in Washington, D.C.

After 1945 the date reflects a country operating at global scale. In 1947, the Journey of Reconciliation, the first interracial Freedom Ride begins through the upper South in violation of Jim Crow laws. The riders wanted enforcement of the United States Supreme Court's 1946 Irene Morgan decision that banned racial segregation in interstate travel. The same year, the Glazier–Higgins–Woodward tornadoes killed 181 people and injured 970 others in Texas, Oklahoma, and Kansas. Then, in 1959, Project Mercury — NASA announces the selection of the United States' first seven astronauts, whom the news media quickly dub the "Mercury Seven" Then, in 1981, the U.S. Navy nuclear submarine USS George Washington accidentally collides with the Nissho Maru, a Japanese cargo ship, sinking it and killing two Japanese sailors.

The date is also a birthday. Among the Americans born on April 9: Charles Proteus Steinmetz (1865), Polish-American mathematician and engineer; Jacques Futrelle (1875), American journalist and author; Frank King (1883), American cartoonist; Sol Hurok (1888), Ukrainian-American talent manager; and Charles E. Burchfield (1893), American painter.

April 9 is also a date of endings. Among the Americans who died on it: Erastus Corning (1872), American businessman and politician; Charles Goodyear (1876), American lawyer, judge, and politician; Helena Modjeska (1909), Polish-American actress; and Zip the Pinhead (1926), American freak show performer.

The date carries formal observance as well — National Former Prisoner of War Recognition Day (United States). The record for April 9 runs 197 years deep across 8 entries. Read in sequence, the date stops being a coincidence and starts being a through-line.