January 6 » Second Boer War: Having already besieged the fortress at Ladysmith, Boer forces attack it, but are driven back by British defenders.
February 9 » The Davis Cup competition is established.
March 7 » The German liner SSKaiser Wilhelm der Grosse becomes the first ship to send wireless signals to shore.
June 14 » The second German Naval Law calls for the Imperial German Navy to be doubled in size, resulting in an Anglo-German naval arms race.
July 27 » Kaiser Wilhelm II makes a speech comparing Germans to Huns; for years afterwards, "Hun" would be a disparaging name for Germans.
October 19 » Max Planck discovers Planck's law of black-body radiation.
Day of marriage June 21, 1928
The temperature on June 21, 1928 was between 10.6 °C and 19.0 °C and averaged 14.7 °C. There was 6.9 hours of sunshine (41%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
January 7 » A disastrous flood of the River Thames kills 14 people and causes extensive damage to much of riverside London.
August 27 » The Kellogg–Briand Pact outlawing war is signed by fifteen nations. Ultimately sixty-one nations will sign it.
October 12 » An iron lung respirator is used for the first time at Children's Hospital, Boston.
October 22 » Phi Sigma Alpha fraternity is founded at the University of Puerto Rico.
November 12 » SSVestris sinks approximately 200 miles (320km) off Hampton Roads, Virginia, killing at least 110 passengers, mostly women and children who die after the vessel is abandoned.
November 18 » Release of the animated short Steamboat Willie, the first fully synchronized sound cartoon, directed by Walt Disney and Ub Iwerks, featuring the third appearances of cartoon characters Mickey Mouse and Minnie Mouse. This is considered by the Disney corporation to be Mickey's birthday.
Day of death June 14, 1930
The temperature on June 14, 1930 was between 14.0 °C and 22.9 °C and averaged 17.1 °C. There was 5.2 hours of sunshine (31%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
February 3 » Communist Party of Vietnam is founded at a "Unification Conference" held in Kowloon, British Hong Kong.
April 22 » The United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding.
April 28 » The Independence Producers hosted the first night game in the history of Organized Baseball in Independence, Kansas.
May 1 » "Pluto" is officially proposed for the name of the newly-discovered dwarf planet Pluto by Vesto Slipher in the Lowell Observatory Observation Circular. The name quickly catches on.
September 6 » Democratically elected Argentine president Hipólito Yrigoyen is deposed in a military coup.
September 8 » 3M begins marketing Scotch transparent tape.
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/I132318.php : accessed October 25, 2026), "Tjitske Senneker (1900-1930)".
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