September 30

September 30 is the 274th day of the year, and the American record for it runs from 1882 to 2019 — a span of 137 years. The entry that anchors it: The McKinley National Memorial, 1907.

Reconstruction and the years that followed added their own entries. In 1882, the Vulcan Street Plant in Appleton, Wisconsin, the first hydroelectric central station to serve a system of private and commercial customers in North America, went online.

The early twentieth century brought industry, air travel and war to the date. In 1907, the McKinley National Memorial, the final resting place of assassinated U.S. President William McKinley and his family, is dedicated in Canton, Ohio. Then, in 1935, the Hoover Dam, astride the border between the U.S. states of Arizona and Nevada, is dedicated. Eight years on, in 1943, the United States Merchant Marine Academy is dedicated by President Roosevelt.

After 1945 the date reflects a country operating at global scale. In 1947, the 1947 World Series begins. It is the first to be televised, to include an African-American player, to exceed $2 million in receipts, to see a pinch-hit home run, and to have six umpires on the field. Seven years on, in 1954, the U.S. Navy submarine USS Nautilus is commissioned as the world's first nuclear-powered vessel. A year later, in 1955, American film actor James Dean suffered fatal injuries in a head-on car accident near Cholame, California.

The most recent entries fall within living memory. In 2019, President Martín Vizcarra dissolved the Congress of Peru, resulting in a constitutional crisis.

The date is also a birthday. Among the Americans born on September 30: Lucinda Hinsdale Stone (1814), American feminist, educator, and philanthropist; Ellis H. Roberts (1827), American journalist and politician, 20th Treasurer of the United States; Ann Jarvis (1832), American activist, co-founded Mother's Day; William Wrigley Jr. (1861), American businessman, founded Wrigley Company; and Thomas W. Lamont (1870), American banker and philanthropist.

September 30 is also a date of endings. Among the Americans who died on it: George Whitefield (1770), English-American priest and theologian; Franz Oppenheimer (1943), German-American sociologist and economist; James Dean (1955), American actor; and Mary Ford (1977), American singer and guitarist.

The date carries formal observance as well — National Day for Truth and Reconciliation or Orange Shirt Day (Canada). The record for September 30 runs 137 years deep across 8 entries. Read in sequence, the date stops being a coincidence and starts being a through-line.