The temperature on April 21, 1911 was between 1.3 °C and 15.1 °C and averaged 9.7 °C. There was 4.6 hours of sunshine (32%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
August 24 » Manuel de Arriaga is elected and sworn-in as the first President of Portugal.
November 1 » World's first combat aerial bombing mission takes place in Libya during the Italo-Turkish War. Second Lieutenant Giulio Gavotti of Italy drops several small bombs.
November 17 » Omega Psi Phi fraternity was founded on the campus of Howard University in Washington, D.C.
November 19 » The Doom Bar in Cornwall claimed two ships, Island Maid and Angele, the latter killing the entire crew except the captain.
Day of death September 30, 1997
The temperature on September 30, 1997 was between 13.5 °C and 19.4 °C and averaged 16.2 °C. There was 6.9 mm of rain during 6.0 hours. There was 0.9 hours of sunshine (8%). The almost completely overcast was. The average windspeed was 1 Bft (weak wind) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from Monday, August 22, 1994 to Monday, August 3, 1998 the cabinet a href="https://nl.wikipedia.org/wiki/Kabinet-Kok_I" class="extern">Kok I, with W. Kok (PvdA) as prime minister.
January 21 » The U.S. House of Representatives votes 395–28 to reprimand Newt Gingrich for ethics violations, making him the first Speaker of the House to be so disciplined.
May 11 » Deep Blue, a chess-playing supercomputer, defeats Garry Kasparov in the last game of the rematch, becoming the first computer to beat a world-champion chess player in a classic match format.
May 27 » The 1997 Central Texas tornado outbreak occurs, spawning multiple tornadoes in Central Texas, including the F5 that killed 27 in Jarrell.
July 6 » The Troubles: In response to the Drumcree dispute, five days of mass protests, riots and gun battles begin in Irish nationalist districts of Northern Ireland.
September 7 » Maiden flight of the Lockheed Martin F-22 Raptor.
November 3 » The United States imposes economic sanctions against Sudan in response to its human rights abuses of its own citizens and its material and political assistance to Islamic extremist groups across the Middle East and Eastern Africa.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I119258.php : accessed January 2, 2026), "Johannes Anema (1911-1997)".
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