About April 12

April 12, 2025 is the 102nd day of the year 2025 in the Gregorian calendar. There are 263 days remaining until the end of this year. The day of the week is Saturday.

You can browse the full year calendar in case you need it.

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Aries is the sun sign of a person born on this day. Diamond is the modern birthstone for this month. Opal is the mystical birthstone from Tibetan origin that dates back over a thousand years.

According to the lunisolar Chinese calendar, there are 311 days remaining before the start of the next Chinese New Year.

What Happened On April 12

  • 238 –
    Gordian II lost the Battle of Carthage against the Numidian forces loyal to Maximinus Thrax and is killed. Gordian I, his father, commits suicide.
  • 467 –
    Anthemius is elevated to Emperor of the Western Roman Empire.
  • 1204 –
    The Crusaders of the Fourth Crusade breach the walls of Constantinople and enter the city, which they completely occupy the following day.
  • 1557 –
    Cuenca is founded in Ecuador.
  • 1606 –
    The Union Flag is adopted as the flag of Great Britain.
  • 1831 –
    Soldiers marching on the Broughton Suspension Bridge in Manchester, England cause it to collapse.
  • 1862 –
    American Civil War: The Andrews Raid (the Great Locomotive Chase) occurred, starting from Big Shanty, Georgia (now Kennesaw).
  • 1864 –
    American Civil War: The Fort Pillow massacre: Confederate forces kill most of the African American soldiers that surrendered at Fort Pillow, Tennessee.
  • 1877 –
    The United Kingdom annexes the Transvaal.
  • 1910 –
    The SMS Zrinyi, one of the last pre-dreadnoughts built by the Austro-Hungarian Navy, is launched.
  • 1927 –
    April 12 Incident: Chiang Kai-shek orders the Communist Party of China members executed in Shanghai, ending the First United Front.
  • 1934 –
    The U.S. Auto-Lite Strike begins, culminating in a five-day melee between Ohio National Guard troops and 6,000 strikers and picketers.
  • 1937 –
    Sir Frank Whittle ground-tests the first jet engine designed to power an aircraft, at Rugby, England.
  • 1945 –
    U.S. President Franklin D. Roosevelt dies while in office; vice-president Harry Truman is sworn in as the 33rd President.
  • 1955 –
    The polio vaccine, developed by Dr. Jonas Salk, is declared safe and effective.
  • 1963 –
    The Soviet nuclear powered submarine K-33 collides with the Finnish merchant vessel M/S Finnclipper in the Danish straits.
  • 1970 –
    Soviet submarine K-8, carrying four nuclear torpedoes, sinks in the Bay of Biscay four days after a fire on board.
  • 1981 –
    The first launch of a Space Shuttle (Columbia) launches on the STS-1 mission.
  • 2007 –
    A suicide bomber penetrated the Green Zone and detonated in a cafeteria within a parliament building, killing Iraqi MP Mohammed Awad and wounding more than twenty other people.
  • 2010 –
    A train derails near Merano, Italy, after running into a landslide, causing nine deaths and injuring 28 people.

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