The temperature on June 11, 1914 was between 9.3 °C and 21.7 °C and averaged 14.5 °C. There was 7.1 mm of rain. There was 1.6 hours of sunshine (10%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
April 21 » Ypiranga incident: A German arms shipment to Mexico is intercepted by the U.S. Navy near Veracruz.
June 23 » Mexican Revolution: Pancho Villa takes Zacatecas from Victoriano Huerta.
August 5 » World War I: The guns of Point Nepean fort at Port Phillip Heads in Victoria (Australia) fire across the bows of the Norddeutscher Lloyd steamer SSPfalz which is attempting to leave the Port of Melbourne in ignorance of the declaration of war and she is detained; this is said to be the first Allied shot of the War.
August 29 » World War I: Start of the Battle of St. Quentin in which the French Fifth Army counter-attacked the invading Germans at Saint-Quentin, Aisne.
September 14 » HMASAE1, the Royal Australian Navy's first submarine, was lost at sea with all hands near East New Britain, Papua New Guinea.
September 26 » The United States Federal Trade Commission is established by the Federal Trade Commission Act.
Day of marriage May 20, 1941
The temperature on May 20, 1941 was between 3.5 °C and 17.5 °C and averaged 11.3 °C. There was 10.1 hours of sunshine (63%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
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.
January 17 » Franco-Thai War: Vichy French forces inflict a decisive defeat over the Royal Thai Navy.
May 27 » World War II: The German battleshipBismarck is sunk in the North Atlantic killing almost 2,100 men.
July 16 » Joe DiMaggio hits safely for the 56th consecutive game, a streak that still stands as an MLB record.
October 4 » Norman Rockwell's Willie Gillis character debuts on the cover of The Saturday Evening Post.
December 12 » World War II: Fifty-four Japanese A6M Zero fighters raid Batangas Field, Philippines. Jesús Villamor and four Filipino fighter pilots fend them off; César Basa is killed.
December 26 » U.S. President Franklin D. Roosevelt signs a bill establishing the fourth Thursday in November as Thanksgiving Day in the United States.
Day of death October 18, 1999
The temperature on October 18, 1999 was between 2.1 °C and 11.0 °C and averaged 6.0 °C. There was 9.5 hours of sunshine (90%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
January 19 » British Aerospace agrees to acquire the defence subsidiary of the General Electric Company plc, forming BAE Systems in November 1999.
March 11 » Infosys becomes the first Indian company listed on the NASDAQ stock exchange.
May 29 » Olusegun Obasanjo takes office as President of Nigeria, the first elected and civilian head of state in Nigeria after 16 years of military rule.
August 17 » The 7.6 Mw İzmit earthquake shakes northwestern Turkey with a maximum Mercalli intensity of IX (Violent), leaving 17,118–17,127 dead and 43,953–50,000 injured.
December 14 » Torrential rains cause flash floods in Vargas, Venezuela, resulting in tens of thousands of deaths, the destruction of thousands of homes, and the complete collapse of the state's infrastructure.
December 31 » Indian Airlines Flight 814 hijacking ended after seven days with the release of 190 survivors at Kandahar Airport, Afghanistan.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I288019.php : accessed February 1, 2026), "Willem Grootoonk (1914-1999)".
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