January 31 » Czechoslav Trade Union Association is founded in Prague.
April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
June 22 » British colonial officers Charles Walter Rand and Lt. Charles Egerton Ayerst are assassinated in Pune, Maharashtra, India by the Chapekar brothers and Mahadeo Vinayak Ranade, who are later caught and hanged.
August 31 » Thomas Edison patents the Kinetoscope, the first movie projector.
September 11 » After months of pursuit, generals of Menelik II of Ethiopia capture Gaki Sherocho, the last king of Kaffa, bringing an end to that ancient kingdom.
September 12 » Tirah Campaign: In the Battle of Saragarhi, ten thousand Pashtun tribesmen suffer several hundred casualties while attacking 21 Sikh soldiers in British service.
Day of marriage May 17, 1933
The temperature on May 17, 1933 was between 5.9 °C and 13.9 °C and averaged 9.3 °C. There was 2.0 hours of sunshine (13%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-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.
In The Netherlands , there was from May 26, 1933 to July 31, 1935 the cabinet Colijn II, with Dr. H. Colijn (ARP) as prime minister.
February 28 » Gleichschaltung: The Reichstag Fire Decree is passed in Germany a day after the Reichstag fire.
March 22 » Cullen–Harrison Act: President Franklin Roosevelt signs an amendment to the Volstead Act, legalizing the manufacture and sale of "3.2 beer" (3.2% alcohol by weight, approximately 4% alcohol by volume) and light wines.
April 1 » English cricketer Wally Hammond set a record for the highest individual Test innings of 336 not out, during a Test match against New Zealand.
August 7 » The Kingdom of Iraq slaughters over 3,000 Assyrians in the village of Simele. This date is recognized as Martyrs Day or National Day of Mourning by the Assyrian community in memory of the Simele massacre.
September 12 » Leó Szilárd, waiting for a red light on Southampton Row in Bloomsbury, conceives the idea of the nuclear chain reaction.
November 7 » Fiorello H. La Guardia is elected the 99th mayor of New York City.
Day of death December 7, 1973
The temperature on December 7, 1973 was between 2.2 °C and 9.3 °C and averaged 4.4 °C. There was 13.8 mm of rain during 9.3 hours. There was 3.0 hours of sunshine (38%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from Thursday, July 20, 1972 to Friday, May 11, 1973 the cabinet Biesheuvel II, with Mr. B.W. Biesheuvel (ARP) as prime minister.
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
February 22 » Cold War: Following President Richard Nixon's visit to the People's Republic of China, the two countries agree to establish liaison offices.
May 8 » A 71-day standoff between federal authorities and the American Indian Movement members occupying the Pine Ridge Reservation at Wounded Knee, South Dakota ends with the surrender of the militants.
May 14 » Skylab, the United States' first space station, is launched.
July 10 » The Bahamas gain full independence within the Commonwealth of Nations.
July 21 » In Lillehammer, Norway, Mossad agents kill a waiter whom they mistakenly thought was involved in the 1972 Munich Olympics Massacre.
December 20 » The Prime Minister of Spain, Admiral Luis Carrero Blanco, is assassinated by a car bomb attack in Madrid.
When copying data from this family tree, please include a reference to the origin: Caspar Evers, "Family tree Evers - van Rijsbergen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-evers-van-rijsbergen/I4086.php : accessed February 21, 2026), "Willem Roovers (1897-1973)".
Copy warning
Genealogical publications are copyright protected. Although data is often retrieved from public archives, the searching, interpreting, collecting, selecting and sorting of the data results in a unique product. Copyright protected work may not simply be copied or republished.
Please stick to the following rules
Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
Do not use this data until you have checked it, preferably at the source (the archives).
State from whom you have copied the data and ideally also his/her original source.