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.
- 1459 –Battle of Blore Heath, the first major battle of the English Wars of the Roses, is fought at Blore Heath in Staffordshire.
- 1641 –The Merchant Royal, carrying a treasure worth over a billion US dollars, is lost at sea off Land’s End.
- 1642 –First commencement exercises occur at Harvard College.
- 1780 –American Revolution: British Major John André is arrested as a spy by American soldiers exposing Benedict Arnold’s change of sides.
- 1803 –Second Anglo-Maratha War: Battle of Assaye between the British East India Company and the Maratha Empire in India.
- 1806 –Lewis and Clark return to St. Louis after exploring the Pacific Northwest of the United States.
- 1821 –Tripolitsa, Greece, falls and 30,000 Turks are massacred during the Greek War of Independence.
- 1857 –The Russian warship Lefort capsizes and sinks during a storm in the Gulf of Finland, killing all 826 aboard.
- 1905 –Norway and Sweden sign the “Karlstad treaty”, peacefully dissolving the Union between the two countries.
- 1908 –University of Alberta in Alberta, Canada, is founded.
- 1932 –The Kingdom of Hejaz and Nejd is renamed the Kingdom of Saudi Arabia.
- 1942 –World War II: First day of the September Matanikau action on Guadalcanal as United States Marine Corps forces attack Imperial Japanese Army units along the Matanikau River.
- 1943 –World War II: The Nazi puppet state the Italian Social Republic is founded.
- 1959 –Iowa farmer and corn breeder Roswell Garst hosts Soviet premier Nikita Khrushchev.
- 1962 –The Lincoln Center for the Performing Arts in New York City opens with the completion of the first building, the Philharmonic Hall (now Avery Fisher Hall) home of the New York Philharmonic.
- 1983 –Saint Kitts and Nevis joins the United Nations.
- 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.
- 2002 –The first public version of the web browser Mozilla Firefox (“Phoenix 0.1”) is released.
Is this your birthday? Are you not curious to learn who shares your special day? Find out the September 23 famous birthdays and expand your knowledge today. (Sponsored link)
Share or Link to This Page: