September 18

September 18 is the 262nd day of the year, and the American record for it runs from 1793 to 1948 — a span of 155 years. The entry that anchors it: American Civil War, 1863.

The revolutionary generation left its own mark on the date. In 1793, the first cornerstone of the United States Capitol is laid by George Washington.

The antebellum decades brought the date closer to the country’s central argument. In 1850, the U.S. Congress passes the Fugitive Slave Act of 1850. A year later, in 1851, the New York Times, the largest metropolitan newspaper in the United States, was founded. Then, in 1863, American Civil War — the Battle of Chickamauga begins between Confederate and Union forces. It involves the second highest amount of casualties for any American Civil War battle apart from Gettysburg. A year later, in 1864, American Civil War — John Bell Hood begins the Franklin–Nashville Campaign in an unsuccessful attempt to draw William Tecumseh Sherman back out of Georgia.

Reconstruction and the years that followed added their own entries. In 1885, five Chinese people were lynched outside of Pierce City in the Idaho Territory of the United States.

The early twentieth century brought industry, air travel and war to the date. In 1910, in Washington, D.C., George Owen Squier demonstrated the first system to allow multiplexing of telephone transmissions, sending a message between two laboratories of the U.S. Signal Corps.

After 1945 the date reflects a country operating at global scale. In 1948, Margaret Chase Smith of Maine becomes the first woman elected to the United States Senate without completing another senator's term.

The date is also a birthday. Among the Americans born on September 18: George Read (1733), American lawyer and politician, 3rd Governor of Delaware; Joseph Story (1779), American lawyer, jurist, and politician; Herschel Vespasian Johnson (1812), American lawyer and politician, 41st Governor of Georgia; Cassius Marcellus Coolidge (1844), American artist; and Francis Grierson (1848), English-American pianist and composer.

September 18 is also a date of endings. Among the Americans who died on it: Joseph K. Mansfield (1862), American general; Dion Boucicault (1890), Irish-American actor and playwright; Robert G. Cole (1944), American colonel, Medal of Honor recipient; and Frank Morgan (1949), American actor.

The date carries formal observance as well — National Day or Dieciocho (Chile) and National HIV/AIDS and Aging Awareness Day (United States). The record for September 18 runs 155 years deep across 8 entries. Read in sequence, the date stops being a coincidence and starts being a through-line.