About April 1

April 1, 2021 is the 91st day of the year 2021 in the Gregorian calendar. There are 274 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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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 306 days remaining before the start of the next Chinese New Year.

April 1: More About This Day

April 1 is most notable in many countries for being April Fools’ Day.

What Happened On April 1

  • 286
    Emperor Diocletian elevates his general Maximian to co-emperor with the rank of Augustus and gives him control over the Western regions of the Roman Empire.
  • 1340
    Niels Ebbesen kills Gerhard III of Holstein in his bedroom, ending the 1332-1340 interregnum in Denmark.
  • 1854
    Hard Times begins serialisation in Charles Dickens’ magazine, Household Words.
  • 1867
    Singapore becomes a British crown colony.
  • 1871
    The first stage of the Brill Tramway opened.
  • 1873
    The British steamer RMS Atlantic sinks off Nova Scotia, killing 547.
  • 1893
    The rank of Chief Petty Officer in the United States Navy is established.
  • 1924
    Adolf Hitler is sentenced to five years in jail for his participation in the “Beer Hall Putsch”. However, he spends only nine months in jail, during which he writes Mein Kampf.
  • 1924
    The Royal Canadian Air Force is formed.
  • 1937
    Aden becomes a British crown colony. Bombing of Jaén, Spain by Nazi forces.
  • 1939
    Generalísimo Francisco Franco of the Spanish State announces the end of the Spanish Civil War, when the last of the Republican forces surrender.
  • 1944
    Navigation errors lead to an accidental American bombing of the Swiss city of Schaffhausen.
  • 1945
    World War II: Operation Iceberg – United States troops land on Okinawa in the last campaign of the war.
  • 1949
    The 26 counties of the Irish Free State become the Republic of Ireland.
  • 1949
    The Canadian government repeals Japanese Canadian internment after seven years.
  • 1978
    The Philippine College of Commerce, through a presidential decree, becomes the Polytechnic University of the Philippines.
  • 1999
    Nunavut is established as a Canadian territory carved out of the eastern part of the Northwest Territories.
  • 2001
    An EP-3E United States Navy surveillance aircraft collides with a Chinese People’s Liberation Army Shenyang J-8 fighter jet. The Navy crew makes an emergency landing in Hainan, People’s Republic of China and is detained.
  • 2001
    Same-sex marriage becomes legal in the Netherlands, the first country to allow it.
  • 2009
    Croatia and Albania join NATO.

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