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September 21 is the 264th day of the year (265th in leap years) ... [10] 1996 – The Defense of Marriage Act is passed by the United States Congress.
Peace Movement. The International Day of Peace, also officially known as World Peace Day, is a United Nations -sanctioned holiday observed annually on 21 September. It is dedicated to world peace, and specifically the absence of war and violence, such as might be occasioned by a temporary ceasefire in a combat zone for humanitarian aid access ...
1976 – A British Airways Hawker Siddeley Trident and an Inex-Adria DC-9 collide near Zagreb, Yugoslavia, killing 176. 1977 – Hamida Djandoubi, convicted of torture and murder, is the last person to be executed by guillotine in France.
The research center reports that some airlines choose to skip gate 13 in airports. Jan. 13, 1128 – Pope Honorious II recognized the Knights Templar as an "Army of God," on Friday, Jan. 13, 1128 ...
October 21 is the 294th day of the year (295th in leap years) in the Gregorian calendar; ... [9] 2019 – In Canada, the 2019 Canadian federal election ends, ...
7. He first landed in the Bahamas. When Columbus reached the New World on October 12, 1492, his ships landed on one of the islands of the Bahamas, probably Watling Island, which he mistook for ...
September is the ninth month of the year in the Gregorian calendar and interchangeably the ninth or tenth month in the less commonly used Julian calendar. In the modern Gregorian calendar, its length is 30 days. September, from the Très Riches Heures du Duc de Berry. September in the Northern Hemisphere and March in the Southern Hemisphere are ...
As a biprime with proper divisors 1, 3 and 7, twenty-one has a prime aliquot sum of 11 within an aliquot sequence containing only one composite number (21, 11, 1, 0); it is the second composite number with an aliquot sum of 11, following 18. 21 is the first member of the second cluster of consecutive discrete semiprimes (21, 22), where the next such cluster is (33, 34, 35).