The temperature on April 26, 1920 was between 4.6 °C and 13.0 °C and averaged 8.0 °C. There was 4.5 mm of rain. There was 2.7 hours of sunshine (19%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 16 » The League of Nations holds its first council meeting in Paris, France.
January 19 » The United States Senate votes against joining the League of Nations.
June 15 » Following the 1920 Schleswig plebiscites, Northern Schleswig is transferred from Germany to Denmark.
August 18 » The Nineteenth Amendment to the United States Constitution is ratified, guaranteeing women's suffrage.
November 7 » Patriarch Tikhon of Moscow issues a decree that leads to the formation of the Russian Orthodox Church Outside Russia.
November 16 » Qantas, Australia's national airline, is founded as Queensland and Northern Territory Aerial Services Limited.
Day of marriage June 15, 1944
The temperature on June 15, 1944 was between 9.8 °C and 17.4 °C and averaged 13.2 °C. There was 10.3 hours of sunshine (62%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
April 24 » World War II: The SBS launches a raid against the garrison of Santorini in Greece.
June 4 » World War II: The United States Fifth Army captures Rome, although much of the German Fourteenth Army is able to withdraw to the north.
June 26 » World War II: The Battle of Osuchy in Osuchy, Poland, one of the largest battles between Nazi Germany and Polish resistance forces, ends with the defeat of the latter.
August 5 » World War II: Polish insurgents liberate a German labor camp (Gęsiówka) in Warsaw, freeing 348 Jewish prisoners.
September 11 » World War II: RAF bombing raid on Darmstadt and the following firestorm kill 11,500.
October 2 » World War II: German troops end the Warsaw Uprising.
Day of death January 7, 1972
The temperature on January 7, 1972 was between -1.2 °C and 1.5 °C and averaged 0.1 °C. There was -0.1 mm of rain. The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east. Source: KNMI
In The Netherlands , there was from April 5, 1967 to Tuesday, July 6, 1971 the cabinet Biesheuvel I, with Mr. B.W. Biesheuvel (ARP) as prime minister.
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.
January 4 » Rose Heilbron becomes the first female judge to sit at the Old Bailey in London, UK.
January 13 » Prime Minister Kofi Abrefa Busia and President Edward Akufo-Addo of Ghana are ousted in a bloodless military coup by Colonel Ignatius Kutu Acheampong.
January 14 » Queen Margrethe II of Denmark ascends the throne, the first Queen of Denmark since 1412 and the first Danish monarch not named Frederick or Christian since 1513.
April 10 » Tombs containing bamboo slips, among them Sun Tzu's Art of War and Sun Bin's lost military treatise, are accidentally discovered by construction workers in Shandong.
April 16 » Apollo program: The launch of Apollo 16 from Cape Canaveral, Florida.
November 28 » Last executions in Paris: Claude Buffet and Roger Bontems are guillotined at La Santé Prison.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I2949.php : accessed February 28, 2026), "Roelf Sluman (1920-1972)".
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.