The temperature on September 8, 1886 was about 21.6 °C. The air pressure was 10 kgf/m2 and came mainly from the west-southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 62%. Source: KNMI
In The Netherlands , there was from April 23, 1884 to April 21, 1888 the cabinet Heemskerk, with Mr. J. Heemskerk Azn. (conservatief) as prime minister.
February 23 » Charles Martin Hall produced the first samples of aluminium from the electrolysis of aluminium oxide, after several years of intensive work. He was assisted in this project by his older sister, Julia Brainerd Hall.
April 8 » William Ewart Gladstone introduces the first Irish Home Rule Bill into the British House of Commons.
May 5 » The Bay View massacre: A militia fires into a crowd of protesters in Milwaukee, killing seven.
June 10 » Mount Tarawera in New Zealand erupts, killing 153 people and burying the famous Pink and White Terraces. Eruptions continue for three months creating a large, 17km long fissure across the mountain peak.
July 4 » The Canadian Pacific Railway's first scheduled train from Montreal arrives in Port Moody on the Pacific coast, after six days of travel.
November 27 » German judge Emil Hartwich sustains fatal injuries in a duel, which would become the background for Theodor Fontane's Effi Briest.
Day of marriage May 18, 1912
The temperature on May 18, 1912 was between 4.0 °C and 16.3 °C and averaged 11.2 °C. There was 7.0 hours of sunshine (44%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
January 17 » British polar explorer Captain Robert Falcon Scott reaches the South Pole, one month after Roald Amundsen.
September 25 » Columbia University Graduate School of Journalism is founded in New York City.
October 11 » First Balkan War: The day after the Battle of Sarantaporo, Greek troops liberate the city of Kozani.
October 18 » First Balkan War: King Peter I of Serbia issues a declaration "To the Serbian People", as his country joins the war.
November 5 » Woodrow Wilson is elected the 28th President of the United States, defeating incumbent William Howard Taft.
December 3 » Bulgaria, Greece, Montenegro, and Serbia (the Balkan League) sign an armistice with the Ottoman Empire, temporarily halting the First Balkan War. (The armistice will expire on February 3, 1913, and hostilities will resume.)
Day of death December 25, 1971
The temperature on December 25, 1971 was between 4.3 °C and 7.7 °C and averaged 6.5 °C. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
March 12 » The 1971 Turkish military memorandum is sent to the Süleyman Demirel government of Turkey and the government resigns.
July 5 » The Twenty-sixth Amendment to the United States Constitution, lowering the voting age from 21 to 18 years, is formally certified by President Richard Nixon.
August 14 » Bahrain declares independence as the State of Bahrain.
August 27 » An attempted coup d'état fails in the African nation of Chad. The Government of Chad accuses Egypt of playing a role in the attempt and breaks off diplomatic relations.
November 28 » Fred Quilt, a leader of the Tsilhqot'in First Nation suffers severe abdominal injuries allegedly caused by Royal Canadian Mounted Police officers; he dies two days later.
December 4 » The PNS Ghazi, a submarine belonging to the Pakistan Navy, sinks during the course of the Indo-Pakistani Naval War of 1971.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I80262.php : accessed October 8, 2026), "Sjoerd Slaaf (1886-1971)".
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