About September 23
September 23, 2021 is the 266th day of the year 2021 in the Gregorian calendar. There are 99 days remaining until the end of this year. The day of the week is Thursday.
You can browse the full year calendar in case you need it.
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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 131 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
- 1642 –First commencement exercises occur at Harvard College.
- 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.
- 1803 –Second Anglo-Maratha War: Battle of Assaye between the British East India Company and the Maratha Empire in India.
- 1846 –Neptune is discovered by French astronomer Urbain Jean Joseph Le Verrier and British astronomer John Couch Adams; the discovery is verified by German astronomer Johann Gottfried Galle.
- 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.
- 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.
- 1943 –World War II: The Nazi puppet state the Italian Social Republic is founded.
- 1952 –Richard Nixon makes his “Checkers speech”.
- 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.
- 1969 –The Chicago Eight trial opens in Chicago.
- 1973 –Juan Perón returns to power in Argentina.
- 1983 –Gerrie Coetzee of South Africa becomes the first African boxing world heavyweight champion.
- 1983 –Saint Kitts and Nevis joins the United Nations.
- 1992 –A large Provisional Irish Republican Army bomb destroys forensic laboratories in Belfast.
- 1999 –NASA announces that it has lost contact with the Mars Climate Orbiter.
- 1999 –Qantas Flight 1 overruns the runway in Bangkok during a storm. Although some passengers only receive minor injuries, it is still the worst crash in Qantas’s history since 1960.
- 2002 –The first public version of the web browser Mozilla Firefox (“Phoenix 0.1”) is released.
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