About September 23
September 23, 2025 is the 266th day of the year 2025 in the Gregorian calendar. There are 99 days remaining until the end of this year. The day of the week is Tuesday.
You can browse the full year calendar in case you need it.
Are you looking for a day of the week calculator? Try it on any date like anniversaries, birthday of someone you know, or any other date that is special to you. You can even try it on historical dates. For example: September 23
(Sponsored by DayOfTheWeek.org)
Virgo is the sun sign of a person born on this day. Sapphire is the modern birthstone for this month. Agate is the mystical birthstone from Tibetan origin that dates back over a thousand years.
According to the lunisolar Chinese calendar, there are 147 days remaining before the start of the next Chinese New Year.
September 23: More About This Day
It is frequently the day of the Autumnal Equinox in the Northern Hemisphere and the day of the Vernal Equinox in the Southern Hemisphere.
What Happened On September 23
- 1409 –Battle of Kherlen, the second significant victory over Ming China by the Mongols since 1368.
- 1641 –The Merchant Royal, carrying a treasure worth over a billion US dollars, is lost at sea off Land’s End.
- 1779 –American Revolution: a squadron commanded by John Paul Jones on board the USS Bonhomme Richard wins the Battle of Flamborough Head, off the coast of England, against two British warships.
- 1780 –American Revolution: British Major John André is arrested as a spy by American soldiers exposing Benedict Arnold’s change of sides.
- 1845 –The Knickerbockers Baseball Club, the first baseball team to play under the modern rules, is founded in New York.
- 1889 –Nintendo Koppai (Later Nintendo Company, Limited) is founded by Fusajiro Yamauchi to produce and market the playing card game Hanafuda.
- 1908 –University of Alberta in Alberta, Canada, is founded.
- 1909 –The Phantom of the Opera (original title: Le Fantôme de l'Opéra), a novel by French writer Gaston Leroux, is first published as a serialization in Le Gaulois.
- 1936 –First ascent of Siniolchu by a German team.
- 1938 –Mobilization of the Czechoslovak army in response to the Munich Crisis.
- 1941 –World War II: The first gas chamber experiments are conducted at Auschwitz.
- 1943 –World War II: The Nazi puppet state the Italian Social Republic is founded.
- 1952 –Richard Nixon makes his “Checkers speech”.
- 1972 –Philippine President Ferdinand Marcos announces over television and radio the implementation of martial law.
- 1983 –Gerrie Coetzee of South Africa becomes the first African boxing world heavyweight champion.
- 1986 –Jim Deshaies of the Houston Astros sets the major-league record by striking out the first eight batters of the game against the Los Angeles Dodgers.
- 1988 –José Canseco of the Oakland Athletics becomes the first member of the 40-40 club.
- 1992 –A large Provisional Irish Republican Army bomb destroys forensic laboratories in Belfast.
- 2002 –The first public version of the web browser Mozilla Firefox (“Phoenix 0.1”) is released.
- 2004 –Hurricane Jeanne: At least 1,070 in Haiti are reported to have been killed by floods.
What no one tells you about your first name’s personality. Are there magical powers in your given name? Check out Audrey’s personality today! (Sponsored links)
Share or Link to This Page: