About October 27
October 27, 2025 is the 300th day of the year 2025 in the Gregorian calendar. There are 65 days remaining until the end of this year. The day of the week is Monday.
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Scorpio is the sun sign of a person born on this day. Opal is the modern birthstone for this month. Jasper is the mystical birthstone from Tibetan origin that dates back over a thousand years.
According to the lunisolar Chinese calendar, there are 113 days remaining before the start of the next Chinese New Year.
What Happened On October 27
- 312 –Constantine the Great is said to have received his famous Vision of the Cross.
- 710 –Saracen invasion of Sardinia.
- 1275 –Traditional founding of the city of Amsterdam.
- 1553 –Condemned as a heretic, Michael Servetus is burned at the stake just outside Geneva.
- 1644 –Second Battle of Newbury in the English Civil War.
- 1682 –Philadelphia, Pennsylvania is founded.
- 1795 –The United States and Spain sign the Treaty of Madrid, which establishes the boundaries between Spanish colonies and the U.S.
- 1930 –ratifications exchanged in London, for the first London Naval Treaty signed in April modifying the 1925 Washington Naval Treaty and the arms limitation treaty’s modified provisions go into effect immediately; further limiting the expensive naval arms race between its five signatories.
- 1944 –World War II: German forces capture Banská Bystrica during Slovak National Uprising thus bringing it to an end.
- 1961 –Mauritania and Mongolia join the United Nations.
- 1961 –NASA launches the first Saturn I rocket in Mission Saturn-Apollo 1.
- 1962 –A plane carrying Enrico Mattei, post-war Italian administrator, crashes in mysterious circumstances.
- 1967 –Catholic priest Philip Berrigan and others of the Baltimore Four protest the Vietnam War by pouring blood on Selective Service records.
- 1973 –The Cañon City meteorite, a 1.4 kg chondrite type meteorite, strikes in Fremont County, Colorado.
- 1981 –The Soviet submarine U 137 runs aground on the east coast of Sweden.
- 1986 –The British government suddenly deregulates financial markets, leading to a total restructuring of the way in which they operate in the country, in an event now referred to as the Big Bang.
- 1994 –The U.S. prison population tops 1 million for the first time in American history.
- 1995 –Former Prime Minister of Italy Bettino Craxi is convicted in absentia of corruption.
- 2005 –The SSETI Express micro-satellite is successfully launched from the Plesetsk Cosmodrome.
- 2011 –The Royal Australian Navy announces that they discovered the wreck of a World War II submarine in Simpson Harbour, Papua New Guinea during Operation RENDER SAFE - it is likely to be Japanese.
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