February 7 » A Chinese immigrant in San Francisco falls ill to bubonic plague in the first plague epidemic in the continental United States.
March 13 » British forces occupy Bloemfontein, Orange Free State, during the Second Boer War.
June 25 » The Taoist monk Wang Yuanlu discovers the Dunhuang manuscripts, a cache of ancient texts that are of great historical and religious significance, in the Mogao Caves of Dunhuang, China.
September 17 » Philippine–American War: Filipinos under Juan Cailles defeat Americans under Colonel Benjamin F. Cheatham Jr. at Mabitac.
October 19 » Max Planck discovers Planck's law of black-body radiation.
December 18 » The Upper Ferntree Gully to Gembrook, Victoria Narrow-gauge (2ft 6 in or 762mm) Railway (now the Puffing Billy Railway) in Victoria, Australia is opened for traffic.
Day of marriage March 4, 1930
The temperature on March 4, 1930 was between 1.9 °C and 13.8 °C and averaged 7.0 °C. There was 6.0 hours of sunshine (54%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. 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.
January 26 » The Indian National Congress declares 26 January as Independence Day or as the day for Poorna Swaraj ("Complete Independence") which occurred 17 years later.
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).
June 17 » U.S. President Herbert Hoover signs the Smoot–Hawley Tariff Act into law.
August 7 » The last confirmed lynching of blacks in the Northern United States occurs in Marion, Indiana; two men, Thomas Shipp and Abram Smith, are killed.
October 27 » Ratifications exchanged in London for the first London Naval Treaty go into effect immediately, further limiting the expensive naval arms race among its five signatories.
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.
When copying data from this family tree, please include a reference to the origin: Wicher Dam, "Dambomen, negen verschillende stambomen DAM", database, Genealogy Online (https://www.genealogieonline.nl/dambomen/I15855.php : accessed January 7, 2026), "Johannes Petrus Houtzager (1900-)".
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