The temperature on May 17, 1888 was about 17.3 °C. The air pressure was 25 kgf/m2 and came mainly from the south-southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 69%. 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.
In The Netherlands , there was from April 21, 1888 to August 21, 1891 the cabinet Mackay, with Mr. A. baron Mackay (AR) as prime minister.
March 11 » The Great Blizzard of 1888 begins along the eastern seaboard of the United States, shutting down commerce and killing more than 400.
April 6 » Thomas Green Clemson dies, bequeathing his estate to the State of South Carolina to establish Clemson Agricultural College.
May 13 » With the passage of the Lei Áurea ("Golden Law"), Empire of Brazil abolishes slavery.
August 5 » Bertha Benz drives from Mannheim to Pforzheim and back in the first long distance automobile trip, commemorated as the Bertha Benz Memorial Route since 2008.
September 8 » Isaac Peral's submarine is first tested.
October 15 » The "From Hell" letter allegedly sent by Jack the Ripper is received by investigators.
Day of marriage April 21, 1912
The temperature on April 21, 1912 was between 6.8 °C and 20.2 °C and averaged 14.4 °C. There was 12.8 hours of sunshine (90%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
January 5 » The 6th All-Russian Conference of the Russian Social Democratic Labour Party (Prague Party Conference) opens. In the course of the conference, Vladimir Lenin and his supporters break from the rest of the party to form the Bolshevik movement.
January 6 » German geophysicist Alfred Wegener first presents his theory of continental drift.
April 18 » The Cunard liner RMSCarpathia brings 705 survivors from the RMSTitanic to New York City.
October 17 » Bulgaria, Greece and Serbia declare war on the Ottoman Empire, joining Montenegro in the First Balkan War.
October 24 » First Balkan War: The Battle of Kumanovo concludes with the Serbian victory against the Ottoman Empire.
December 19 » William Van Schaick, captain of the steamship General Slocum which caught fire and killed over one thousand people, is pardoned by U.S. President William Howard Taft after 3⁄2 years in Sing Sing prison.
Day of death December 18, 1979
The temperature on December 18, 1979 was between -0.2 °C and 7.3 °C and averaged 5.3 °C. There was 2.0 mm of rain during 4.8 hours. There was 1.4 hours of sunshine (18%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
March 5 » Soviet probes Venera 11, Venera 12 and the German-American solar satellite Helios II all are hit by "off the scale" gamma rays leading to the discovery of soft gamma repeaters.
March 13 » The New Jewel Movement, headed by Maurice Bishop, ousts the Prime Minister of Grenada, Eric Gairy, in a coup d'état.
May 9 » Iranian Jewish businessman Habib Elghanian is executed by firing squad in Tehran, prompting the mass exodus of the once 100,000-strong Jewish community of Iran.
June 18 » SALT II is signed by the United States and the Soviet Union.
September 29 » The dictator Francisco Macias of Equatorial Guinea is shot by soldiers from Western Sahara.
December 21 » Lancaster House Agreement: An independence agreement for Rhodesia is signed in London by Lord Carrington, Sir Ian Gilmour, Robert Mugabe, Joshua Nkomo, Bishop Abel Muzorewa and S.C. Mundawarara.
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/I167475.php : accessed October 16, 2026), "Willem Jonkman (1888-1979)".
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