January 23 » The Malolos Constitution is inaugurated, establishing the First Philippine Republic. Emilio Aguinaldo is sworn in as its first President.
March 6 » Bayer registers "Aspirin" as a trademark.
May 30 » Pearl Hart, a female outlaw of the Old West, robs a stage coach 30 miles southeast of Globe, Arizona.
July 26 » Ulises Heureaux, the 27th President of the Dominican Republic, is assassinated.
September 13 » Henry Bliss is the first person in the United States to be killed in an automobile accident.
November 29 » FC Barcelona is founded by Catalan, Spanish and Englishmen. It later develops into one of Spanish football's most iconic and strongest teams.
Day of marriage April 15, 1930
The temperature on April 15, 1930 was between 5.0 °C and 11.2 °C and averaged 7.4 °C. There was 7.0 hours of sunshine (51%). The average windspeed was 6 Bft (strong wind) and was prevailing from the north-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.
March 6 » International Unemployment Day demonstrations globally initiated by the Comintern.
March 13 » The news of the discovery of Pluto is announced by Lowell Observatory.
July 30 » In Montevideo, Uruguay wins the first FIFA World Cup.
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.
September 27 » Bobby Jones wins the (pre-Masters) Grand Slam of golf.
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.
When copying data from this family tree, please include a reference to the origin: R.A.Hemerik, "Descendants Hemerik-Broekhuizen-Huner-Koper-Barink", database, Genealogy Online (https://www.genealogieonline.nl/parenteel-hemerik/I31340.php : accessed January 8, 2026), "Willem Jacobus de Haan (1899-????)".
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