April 20 » U.S. President William McKinley signed a joint resolution to Congress for declaration of war against Spain, beginning the Spanish–American War.
June 13 » Yukon Territory is formed, with Dawson chosen as its capital.
June 22 » Spanish–American War: In a chaotic operation, 6,000 men of the U.S. Fifth Army Corps begins landing at Daiquirí, Cuba, about 16 miles (26km) east of Santiago de Cuba. Lt. Gen. Arsenio Linares y Pombo of the Spanish Army outnumbers them two-to-one, but does not oppose the landings.
July 7 » US President William McKinley signs the Newlands Resolution annexing Hawaii as a territory of the United States.
September 10 » Empress Elisabeth of Austria is assassinated by Luigi Lucheni.
December 26 » Marie and Pierre Curie announce the isolation of radium.
Day of marriage May 7, 1930
The temperature on May 7, 1930 was between 1.7 °C and 13.8 °C and averaged 7.4 °C. There was 0.2 mm of rain during 0.3 hours. There was 2.5 hours of sunshine (16%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the 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 18 » Elm Farm Ollie becomes the first cow to fly in a fixed-wing aircraft and also the first cow to be milked in an aircraft.
March 13 » The news of the discovery of Pluto is announced by Lowell Observatory.
March 31 » The Motion Picture Production Code is instituted, imposing strict guidelines on the treatment of sex, crime, religion and violence in film, in the U.S., for the next thirty-eight years.
April 28 » The Independence Producers hosted the first night game in the history of Organized Baseball in Independence, Kansas.
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.
November 11 » Patent number US1781541 is awarded to Albert Einstein and Leó Szilárd for their invention, the Einstein refrigerator.
When copying data from this family tree, please include a reference to the origin: Hans Docter, "Family tree Docter", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-docter/I575.php : accessed January 30, 2026), "Johannes Harmanus Coors (1898-????)".
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