During the American Revolution, the U.S. ship Bonhomme Richard, commanded by John Paul Jones, wins a hard-fought engagement against the British ships of war Serapis and Countess of Scarborough, off the eastern coast of England.

German astronomer Johann Gottfried Galle discovers the planet Neptune at the Berlin Observatory.

On September 23, 1933, a party of American geologists lands at the Persian Gulf port of Jubail in Saudi Arabia and begins its journey into the desert. That July, with the discovery of a massive oil field at Ghawar, Saudi King Abdel Aziz had granted the Standard Oil Company of California a concession to “explore and search for and drill and extract and manufacture and transport” petroleum and “kindred bituminous matter” in the country’s vast Eastern Province; in turn, Standard Oil immediately dispatched the team of scientists to locate the most profitable spot for the company to begin its drilling.

On September 23, 1944, during a campaign dinner with the International Brotherhood of Teamsters union, President Franklin D. Roosevelt makes a reference to his small dog, Fala, who had recently been the subject of a Republican political attack. The offense prompted Roosevelt to defend his dog’s honor and his own reputation.

On September 23, 1969, Butch Cassidy and the Sundance Kid, starring Paul Newman and Robert Redford as a team of bank robbers in the Old West, premieres in New York City. The film was a commercial and critical success, receiving seven Oscar nominations (including Best Picture and Best Director) and winning in the categories of Best Screenplay (William Goldman), Best Song (Burt Bacharach’s “Raindrops Keep Falling on My Head”), Best Score and Best Cinematography.

On September 23, 1992, Manon Rheaume becomes the first woman to play in one of the four major men's North American pro sports leagues when she takes the ice for the NHL's Tampa Bay Lightning in a preseason game. The 20-year-old goalie faces nine shots and allows two goals in St. Louis' 6-4 victory. "I was very nervous," she tells the Tampa Bay Tribune.