September 23

It is frequently the first day of in the Northern Hemisphere, and the first day of the  season in the Southern Hemisphere.

Events

 * -, the first major battle of the , is fought at  in.
 * - The begins as  begins his attack on the city.
 * - First commencement exercises occur at.
 * - ; squadron commanded by in  wins the, off the coast of , against two  warships.
 * - ;   arrested as a  by  soldiers exposing 's treason.
 * - return to, after exploring the  of the.
 * - Border demarcation markers for formally installed.
 * - The, the first team to play under the modern rules, is founded in.
 * - Discovery of by    and   ; verified by.
 * - First commercial production of by  on a stove at his home in  in the  and marketed as ''.
 * - (Lares Revolt) occurs in  against  rule.
 * - ("Billy the Kid") is arrested for the first time.
 * - patents his mechanical tabulating machine.
 * - ' Koppai (Later ' Company, Limited) founded by to produce and market the playing card game.
 * - and  sign the " treaty", peacefully dissolving the  between the two countries.
 * - First "" is released.
 * - passed by the.
 * - The Kingdom of and  is renamed the Kingdom of.
 * - The first gas experiments are conducted at.
 * - First day of the September on  as  forces attack  units along the.
 * 1952  -  makes his "".
 * The ’s first  RO/RO   makes maiden voyage across.
 * 1962  -  in  opens with the first building completed, Philharmonic Hall (now ) home of the . ABC broadcasts in color for the first time, airing the initial epsisode of "The Jetsons."
 * - The trial opens in.
 * -   announces over television and radio the implementation of  and signs General Order No. 1  which orders the arrest of opposition leaders,, banning travel to other countries except for diplomatic missions, abolishing the , establishing  dictatorial government, take-over or  of public and private corporations and suspension of classes for one week in the.
 * - returns to power in.
 * - joins the.
 * 1983  -  of  becomes the first n  world heavyweight champion.
 * - of the  becomes the first member of the.
 * - announces that it has lost contact with the.
 * 1999  -  overruns the runway in  during a storm. While some passengers only received minor injuries, it is still the worst crash in 's history to date.
 * - The first public version of the web browser ("Phoenix 0.1") is released.
 * - At least 1,070 in reported killed by s due to
 * - killing of  on.
 * - At least 1,070 in reported killed by s due to
 * - killing of  on.

Births

 * -, Greek playwright (d. )
 * -, (d. )
 * - (d. )
 * - of Japan (d. )
 * - of the Mongol Empire (d. )
 * -, Duchess of Savoy (d. )
 * -, wife of (d. )
 * -, American statesman (d. )
 * -, English bishop (d. )
 * - King (d. )
 * - (d. )
 * -, queen of piedmont-Sardinia (d. )
 * - (d. )
 * -, German astronomer (d. )
 * -, French physicist (d. )
 * -, American suffragist (d. )
 * -, American surgeon (d. )
 * -, German inventor and industrialist (d. )
 * -, American writer (d. )
 * -, Queen of Serbia (d. )
 * -, British novelist (d. )
 * -, also known as Typhoid Mary, first carrier of typhoid
 * -, Scottish physician, (d. )
 * -, American journalist (d. )
 * -, German general (d. )
 * -, American baseball player (d. )
 * -, Canadian actor (d. )
 * -, Justice of the U.S. Supreme Court (d. )
 * -, American sculptor (d. )
 * -, Czech writer, (d. )
 * -, French novelist (d. )
 * 1907  -, heir to the throne of  (d. )
 * -, (d. )
 * -, Pakistani researcher, critic and linguist (d. )
 * 1912  -, American sculptor (d. )
 * -, Sultan of Brunei (d. )
 * -, American physicist, (d. )
 * -, Italian politician (d. )
 * -, American actor
 * -, Nicaraguan newspaper editor (d. )
 * -, Cambridge scholar, and Chinese historian (d. )
 * 1925  -, Italian actress
 * -, American saxophonist (d. )
 * -, English musician (d. )
 * -, American musician (d. )
 * 1930  -, British actor (d. )
 * -, Canadian educator (d. )
 * -, Crown Prince of Afghanistan
 * -, Peruvian politician
 * -, American actor
 * 1938  -, Austrian actress (d. )
 * -, English cricket commentator
 * 1939  -, American guitarist (d. )
 * 1939  -, Polish actor
 * -, French Canadian ice hockey player
 * 1941  -, Black Panther and American revolutionary
 * -, Puerto Rican politician
 * -, Spanish singer
 * 1943  -, American football coach
 * -, Scottish-born Australian singer and songwriter
 * -, American actor
 * 1945  -, Russian politician
 * -, Austrian politician
 * -, American actress
 * 1947  -, American singer and musician
 * 1947  -, American drummer for
 * -, American singer and songwriter
 * -, American actor (d. )
 * -, Italian footballer
 * 1956  -, American writer
 * -, American actress
 * 1957  -, Cuban baseball player
 * -, British musician
 * 1958  -, American football coach
 * 1958  -, American golfer
 * -, American actor
 * 1959  -, English singer and songwriter
 * 1959  -, American actress
 * -, British actor
 * -, American actor
 * 1961  -, American astronaut (d. )
 * 1964  -, Welsh footballer
 * -, Japanese singer
 * -, American actress
 * -, English television presenter
 * -, American actress (d. )
 * 1969  -, French singer
 * 1969  -, Finnish rally driver
 * 1969  -, Canadian ice hockey player
 * -, American musician
 * 1970  -, Greek footballer
 * -, American music producer and rapper
 * 1972  -, British radio personality
 * -, Argentinian pianist
 * -, American professional wrestler
 * 1974  -, Japanese actress and model
 * -, American model and actress
 * 1975  -, American rapper
 * 1975  -, British radio personality
 * -, American actor and model
 * -, American singer and songwriter
 * 1977  -, Canadian ice hockey player
 * -, American filmmaker
 * 1978  -, American actress
 * -, American basketball player
 * -, American television producer
 * -, Dutch race car driver
 * 1981  -, German singer
 * 1981  -, American actress
 * -, American actress
 * 1984  -, American musician, keyboardist for
 * -, Japanese pop idol
 * 1985  -, American victim of bullying (d. 1998)
 * 1985  -, American football player
 * 1985  -, Czech ice hockey player
 * 1985  -, Iranian footballer
 * 1985  -, American baseball player
 * -, English footballer
 * -, American actor

Deaths

 * -, Icelandic historian, poet, and politician (b. )
 * - (b. )
 * -, queen of (b. )
 * -, English bishop (b. )
 * -, Japanese warlord (b. )
 * -, French poet
 * -, founder of the Académie Française (b. )
 * -, German jurist (b. )
 * -, Dutch humanist and physician (b. )
 * -, English writer (b. )
 * -, Norwegian bishop and botanist (b. )
 * -, American Continental Congressman (b. )
 * -, Italian composer (b. )
 * -, Russian general and statesman (b. )
 * -, English-born explorer of South Australia (b. )
 * -, Uruguayan hero (b. )
 * -, French author (b. )
 * -, French Canadian politician (b. )
 * -, French astronomer (b. )
 * -, French mathematician (b. )
 * -, British author (b. )
 * -, American philanthropist and university founder (b. )
 * -, German World War I pilot (b. )
 * -, Austrian-born chemist, (b. )
 * -, Austrian psychiatrist (b. )
 * -, English author (b. )
 * -, Swiss novelist (b. )
 * -, American basketball player and coach (b. )
 * -, "Padre Pio", Catholic saint (b. )
 * -, French actor and singer (b. )
 * -, American mathematician (b. )
 * 1971  -, American actor (b. )
 * -, Chilean poet, (b. )
 * -, American comedian and actor (b. )
 * -, American baseball player (murdered) (b. )
 * -, Canadian actor (b. )
 * -, American dancer, choreographer, and actor (b. )
 * -, Croatian explorer (b. )
 * -, U.S. Army general (b. )
 * -, American golfer (b. )
 * 1994  -, American author (b. )
 * 1994  -, French theater and film actress (b. )
 * -, American actress (b. )
 * -, Mexican player (b. )
 * 2000  -, American journalist (b. )
 * -, Sri Lankan broadcaster (b. )
 * -, American rockabilly musician (b. )
 * 2003  -, Russian TV anchorman (b. )
 * -, Dutch singer (b. )
 * 2004  -, Canadian ice hockey player and coach (b. )
 * -, Puerto Rican revolutionary (b. )
 * 2005  -, English actor (b. )
 * -, English composer and professional trumpeter (b. )
 * 2006  -, American blues guitarist (b.)
 * 2006  -, American blues guitarist (b.)

Holidays and observances

 * Usually the first day of sun sign in the tropical.
 * In ancient, the second day of.
 * - of  of,.
 * Also see.
 * Traditional in  and es — because of the birthday of, not because of the equinox.
 * ese Day (秋分の日/Shūbun no hi).
 * - (unification ).
 * - Day, second day in the.
 * was first recognized in and is observed mainly in the U.S., Canada, Europe, and Australia.