What are the important events that happened on September 23? Here are historical events, facts, and some myths about this day.

September 23: Facts & Myths About This Day

September 23 is the 266^th 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.

Under the Julian calendar, this day is September 10, 2025 – a Tuesday. Both day of the week are the same but did you notice the difference with the Gregorian calendar?

When this day started, 29,309,760 minutes has elapsed since midnight of January 1, 1970 – the Unix epoch.

Strange as it may, if we name this day after a polygon then it will be called ‘dihectahexacontahexagon’ day.

Virgo is the zodiac 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.

The ancient Maya civilization believes that the end of the world will happen on December 21, 2012. There are now 4,659 days since this fabled cataclysmic event.

September 23: This Day In History

It is frequently the day of the Autumnal Equinox in the Northern Hemisphere and the day of the Vernal Equinox in the Southern Hemisphere.

September 23 Historical Events

• 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.
• 1845 –
  The Knickerbockers Baseball Club, the first baseball team to play under the modern rules, is founded in New York.
• 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.
• 1932 –
  The Kingdom of Hejaz and Nejd is renamed the Kingdom of Saudi Arabia.
• 1941 –
  World War II: The first gas chamber experiments are conducted at Auschwitz.
• 1973 –
  Juan Perón returns to power in Argentina.
• 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.
• 1999 –
  Celebrate Bisexuality Day was first observed in the United States.

Who were born on September 23?

• 1740 –
  Empress Go-Sakuramachi of Japan (d. 1813)
• 1929 –
  Wally Whyton, English musician (d. 1997)
• 1931 –
  Hilly Kristal, American club owner (CBGB) and musician (d. 2007)
• 1935 –
  Les McCann, American soul jazz piano player and vocalist
• 1943 –
  Julio Iglesias, Spanish singer
• 1954 –
  Cherie Blair, British lawyer and spouse of former Prime Minister of the United Kingdom, Tony Blair
• 1961 –
  Elizabeth Peña, American actress
• 1964 –
  Larry Krystkowiak, American basketball player and head coach
• 1977 –
  Fabio Ongaro, Italian rugby player
• 1986 –
  Martin Cranie, English footballer

Who died on September 23?

• 1571 –
  John Jewel, English bishop (b. 1522)
• 1764 –
  Robert Dodsley, English writer (b. 1703)
• 1943 –
  Elinor Glyn, English author (b. 1864)
• 1958 –
  Jacob Nicol, Canadian newspaper publisher and politician (b. 1876)
• 1994 –
  Jerry Barber, American golfer (b. 1916)
• 1998 –
  Mary Frann, American actress (b. 1943)
• 2005 –
  Filiberto Ojeda Ríos, Puerto Rican revolutionary (b. 1933)
• 2006 –
  Etta Baker, American blues guitarist (b. 1913)
• 2006 –
  Sir Malcolm Arnold, English composer and professional trumpeter (b. 1921)
• 2008 –
  Peter Leonard, Australian journalist (b. 1942)