About September 23
September 23, 2024 is the 267th day of the year 2024 in the Gregorian calendar. There are 99 days remaining until the end of this year. The day of the week is Monday.
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 128 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
- 1122 –Pope Calixtus II and Holy Roman Emperor Henry V agree to the Concordat of Worms to put an end to the Investiture Controversy.
- 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.
- 1806 –Lewis and Clark return to St. Louis after exploring the Pacific Northwest of the United States.
- 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.
- 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.
- 1941 –World War II: The first gas chamber experiments are conducted at Auschwitz.
- 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.
- 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.
- 1983 –Gulf Air Flight 771 is bombed, killing all 117 people on board.
- 1983 –Saint Kitts and Nevis joins the United Nations.
- 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.
- 1999 –Celebrate Bisexuality Day was first observed in the United States.
- 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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