About September 18
September 18, 2025 is the 261st day of the year 2025 in the Gregorian calendar. There are 104 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 152 days remaining before the start of the next Chinese New Year.
What Happened On September 18
- 14 –Tiberius is confirmed as Roman Emperor by the Roman Senate following the natural death of Augustus
- 1180 –Philip Augustus becomes king of France.
- 1679 –New Hampshire becomes a county of the Massachusetts Bay Colony.
- 1793 –The first cornerstone of the Capitol building is laid by George Washington.
- 1809 –The Royal Opera House in London opens.
- 1851 –First publication of The New-York Daily Times, which later becomes The New York Times.
- 1872 –King Oscar II accedes to the throne of Sweden-Norway.
- 1879 –The Blackpool Illuminations are switched on for the first time.
- 1911 –Russian Premier Peter Stolypin is shot at the Kiev Opera House.
- 1922 –Hungary is admitted to League of Nations.
- 1931 –The Mukden Incident gives Japan the pretext to invade and occupy Manchuria.
- 1939 –The Nazi propaganda broadcaster known as Lord Haw-Haw begins transmitting.
- 1939 –World War II: Polish government of Ignacy Mościcki flees to Romania.
- 1947 –The National Security Council and the Central Intelligence Agency were established in the United States under the National Security Act.
- 1961 –U.N. Secretary-General Dag Hammarskjöld dies in a plane crash while attempting to negotiate peace in the war-torn Katanga region of the Democratic Republic of the Congo.
- 1964 –Constantine II of Greece marries Danish princess Anne-Marie.
- 1973 –The Bahamas, East Germany and West Germany are admitted to the United Nations.
- 1981 –Assemblée Nationale votes to abolish capital punishment in France.
- 1984 –Joe Kittinger completes the first solo balloon crossing of the Atlantic.
- 2001 –First mailing of anthrax letters from Trenton, New Jersey in the 2001 anthrax attacks.
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