January 30 » The first Anglo-Japanese Alliance is signed in London.
April 2 » "Electric Theatre", the first full-time movie theater in the United States, opens in Los Angeles.
April 18 » The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
August 22 » Theodore Roosevelt becomes the first President of the United States to make a public appearance in an automobile.
November 29 » The Pittsburgh Stars defeated the Philadelphia Athletics, 11–0 to win the first championship associated with an American national professional football league.
Day of marriage November 11, 1930
The temperature on November 11, 1930 was between 3.5 °C and 10.3 °C and averaged 6.3 °C. There was 1.5 mm of rain during 1.0 hours. There was 4.4 hours of sunshine (49%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the west-northwest. 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.
March 13 » The news of the discovery of Pluto is announced by Lowell Observatory.
April 2 » After the mysterious death of Empress Zewditu, Haile Selassie is proclaimed emperor of Ethiopia.
May 24 » Amy Johnson lands in Darwin, Northern Territory, becoming the first woman to fly solo from England to Australia (she left on May 5 for the 11,000 mile flight).
August 16 » The first color sound cartoon, Fiddlesticks, is released by Ub Iwerks.
August 29 » The last 36 remaining inhabitants of St Kilda are voluntarily evacuated to other parts of Scotland.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I62096.php : accessed February 16, 2026), "Harm Steven Hofkamp (1902-)".
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