January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
January 23 » Second Boer War: The Battle of Spion Kop between the forces of the South African Republic and the Orange Free State and British forces ends in a British defeat.
February 23 » Second Boer War: During the Battle of the Tugela Heights, the first British attempt to take Hart's Hill fails.
May 18 » The United Kingdom proclaims a protectorate over Tonga.
July 2 » The first Zeppelin flight takes place on Lake Constance near Friedrichshafen, Germany.
July 19 » The first line of the Paris Métro opens for operation.
Day of death June 10, 1979
The temperature on June 10, 1979 was between 8.1 °C and 18.2 °C and averaged 13.9 °C. There was 0.5 mm of rain during 0.6 hours. There was 8.1 hours of sunshine (49%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northeast. 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 8 » Philips demonstrates the compact disc publicly for the first time.
March 25 » The first fully functional Space Shuttle orbiter, Columbia, is delivered to the John F. Kennedy Space Center to be prepared for its first launch.
August 5 » In Afghanistan, Maoists undertake the Bala Hissar uprising against the Leninist government.
October 12 » The lowest recorded non-tornadic atmospheric pressure, 87.0 kPa (870 mbar or 25.69 inHg), occurred in the western Pacific Ocean during Typhoon Tip.
November 19 » Iran hostage crisis: Iranian leader Ayatollah Ruhollah Khomeini orders the release of 13 female and black American hostages being held at the US Embassy in Tehran.
December 12 » The 8.2 Mw Tumaco earthquake shakes Colombia and Ecuador with a maximum Mercalli intensity of IX (Violent), killing 300–600, and generating a large tsunami.
When copying data from this family tree, please include a reference to the origin: John Bart, "Family tree Denneman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-denneman/I1126.php : accessed February 16, 2026), "Marinus Adam Kolster (1900-1979)".
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