February 1 » Shinhan Bank, the oldest bank in South Korea, opens in Seoul.
April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
September 11 » After months of pursuit, generals of Menelik II of Ethiopia capture Gaki Sherocho, the last king of Kaffa, bringing an end to that ancient kingdom.
December 30 » The British Colony of Natal annexes Zululand.
Day of marriage February 27, 1920
The temperature on February 27, 1920 was between 1.7 °C and 6.0 °C and averaged 4.6 °C. There was 4.9 mm of rain. There was 0.9 hours of sunshine (8%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the west-northwest. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 13 » The Reichstag Bloodbath of January 13, 1920, the bloodiest demonstration in German history.
January 16 » Zeta Phi Beta Sorority Incorporated was founded on the campus of Howard University.
January 17 » Alcohol Prohibition begins in the United States as the Volstead Act goes into effect.
February 13 » The Negro National League is formed.
March 8 » The Arab Kingdom of Syria, the first modern Arab state to come into existence, is established.
May 16 » In Rome, Pope Benedict XV canonizes Joan of Arc.
Day of death February 4, 1967
The temperature on February 4, 1967 was between 3.4 °C and 8.4 °C and averaged 6.2 °C. There was 3.8 hours of sunshine (41%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
April 23 » Soviet space program: Soyuz 1 (Russian: Союз 1, Union 1) a manned spaceflight carrying cosmonaut Colonel Vladimir Komarov is launched into orbit.
May 26 » The Beatles' Sgt. Pepper's Lonely Hearts Club Band is released.
June 12 » The United States Supreme Court in Loving v. Virginia declares all U.S. state laws which prohibit interracial marriage to be unconstitutional.
June 17 » Nuclear weapons testing: China announces a successful test of its first thermonuclear weapon.
September 10 » The people of Gibraltar vote to remain a British dependency rather than becoming part of Spain.
November 30 » The Pakistan Peoples Party is founded by Zulfikar Ali Bhutto, who becomes its first chairman.
When copying data from this family tree, please include a reference to the origin: Arnold Romeijnders, "Zijper families", database, Genealogy Online (https://www.genealogieonline.nl/zijper-families/I47225.php : accessed May 30, 2024), "Pieter Boonacker (1897-1967)".
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