The temperature on April 12, 1878 was about 11.8 °C. The air pressure was 2 kgf/m2 and came mainly from the east-northeast. The airpressure was 77 cm mercury. The atmospheric humidity was 69%. Source: KNMI
In The Netherlands , there was from November 3, 1877 to August 20, 1879 the cabinet Kappeijne van de Coppello, with Mr. J. Kappeijne van de Coppello (liberaal) as prime minister.
January 16 » Russo-Turkish War (1877–78): Battle of Philippopolis: Captain Aleksandr Burago with a squadron of Russian Imperial army dragoons liberates Plovdiv from Ottoman rule.
June 10 » League of Prizren is established, to oppose the decisions of the Congress of Berlin and the Treaty of San Stefano, as a consequence of which the Albanian lands in the Balkans were being partitioned and given to the neighbor states of Serbia, Montenegro, Bulgaria, and Greece.
October 22 » The Bramall Lane stadium sees the first rugby match played under floodlights.
November 17 » First assassination attempt against Umberto I of Italy by anarchist Giovanni Passannante, who was armed with a dagger. The King survived with a slight wound in an arm. Prime Minister Benedetto Cairoli blocked the aggressor, receiving an injury in a leg.
December 18 » The Al-Thani family become the rulers of the state of Qatar.
December 31 » Karl Benz, working in Mannheim, Germany, filed for a patent on his first reliable two-stroke gas engine, and he was granted the patent in 1879.
Day of marriage July 25, 1903
The temperature on July 25, 1903 was between 11.7 °C and 21.8 °C and averaged 15.9 °C. There was 4.3 hours of sunshine (27%). Source: KNMI
June 16 » Roald Amundsen leaves Oslo, Norway, to commence the first east–west navigation of the Northwest Passage.
July 1 » Start of first Tour de France bicycle race.
July 19 » Maurice Garin wins the first Tour de France.
July 23 » The Ford Motor Company sells its first car.
September 11 » The first race at the Milwaukee Mile in West Allis, Wisconsin is held. It is the oldest major speedway in the world.
November 17 » The Russian Social Democratic Labour Party splits into two groups: The Bolsheviks (Russian for "majority") and Mensheviks (Russian for "minority").
Day of death July 18, 1964
The temperature on July 18, 1964 was between 17.2 °C and 31.7 °C and averaged 23.7 °C. There was 7.1 mm of rain during 1.4 hours. There was 9.1 hours of sunshine (56%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south east. Source: KNMI
May 5 » The Council of Europe declares May 5 as Europe Day.
June 21 » Three civil rights workers, Andrew Goodman, James Chaney and Michael Schwerner, are murdered in Neshoba County, Mississippi, United States, by members of the Ku Klux Klan.
October 10 » The Tokyo Summer Olympics opening ceremony is the first to be relayed live by satellites.
October 16 » Leonid Brezhnev becomes leader of the Soviet Communist Party, while Alexei Kosygin becomes the head of government.
October 27 » Ronald Reagan delivers a speech on behalf of the Republican candidate for president, Barry Goldwater. The speech launches his political career and comes to be known as "A Time for Choosing".
December 24 » Vietnam War: Viet Cong operatives bomb the Brinks Hotel in Saigon, South Vietnam to demonstrate they can strike an American installation in the heavily guarded capital.
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/I174841.php : accessed January 22, 2026), "Roelof Koops (1878-1964)".
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