April 18 » The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
May 8 » In Martinique, Mount Pelée erupts, destroying the town of Saint-Pierre and killing over 30,000 people. Only a handful of residents survive the blast.
May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
August 22 » Cadillac Motor Company is founded.
Day of marriage May 1, 1930
The temperature on May 1, 1930 was between 3.0 °C and 16.7 °C and averaged 10.2 °C. There was 6.0 hours of sunshine (40%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the 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.
February 16 » The Romanian Football Federation joins FIFA.
March 6 » International Unemployment Day demonstrations globally initiated by the Comintern.
June 17 » U.S. President Herbert Hoover signs the Smoot–Hawley Tariff Act into law.
August 29 » The last 36 remaining inhabitants of St Kilda are voluntarily evacuated to other parts of Scotland.
December 7 » W1XAV in Boston, Massachusetts telecasts video from the CBS radio orchestra program, The Fox Trappers. The telecast also includes the first television commercial in the United States, an advertisement for I.J. Fox Furriers, who sponsored the radio show.
Day of death October 13, 1968
The temperature on October 13, 1968 was between 11.8 °C and 16.4 °C and averaged 13.6 °C. There was 1.5 hours of sunshine (14%). The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
March 16 » General Motors produces its 100 millionth automobile, the Oldsmobile Toronado.
March 18 » Gold standard: The U.S. Congress repeals the requirement for a gold reserve to back US currency.
June 11 » Lloyd J. Old identified the first cell surface antigens that could differentiate among different cell types.
October 16 » Kingston, Jamaica is rocked by the Rodney riots, inspired by the barring of Walter Rodney from the country.
November 15 » The Cleveland Transit System becomes the first transit system in the western hemisphere to provide direct rapid transit service from a city's downtown to its major airport.
December 25 » Apollo program: Apollo 8 performs the first successful Trans-Earth injection (TEI) maneuver, sending the crew and spacecraft on a trajectory back to Earth from Lunar orbit.
When copying data from this family tree, please include a reference to the origin: H. van Dalen, "Family tree Van Dalen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-dalen/I752.php : accessed February 24, 2026), "Roelof Broekman (1902-1968)".
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