The temperature on June 29, 1880 was about 19.7 °C. The air pressure was 2 kgf/m2 and came mainly from the west-southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 72%. Source: KNMI
In The Netherlands , there was from August 20, 1879 to April 23, 1883 the cabinet Van Lijnden van Sandenburg, with Mr. C.Th. baron Van Lijnden van Sandenburg (conservatief-AR) as prime minister.
February 13 » Thomas Edison observes Thermionic emission.
May 11 » Seven people are killed in the Mussel Slough Tragedy, a gun battle in California.
May 13 » In Menlo Park, New Jersey, Thomas Edison performs the first test of his electric railway.
July 27 » Second Anglo-Afghan War: Battle of Maiwand: Afghan forces led by Mohammad Ayub Khan defeat the British Army in battle near Maiwand, Afghanistan.
September 1 » The army of Mohammad Ayub Khan is routed by the British at the Battle of Kandahar, ending the Second Anglo-Afghan War.
December 16 » Outbreak of the First Boer War between the Boer South African Republic and the British Empire.
Day of marriage June 3, 1903
The temperature on June 3, 1903 was between 9.3 °C and 13.1 °C and averaged 11.1 °C. There was -0.1 hours of sunshine (0%). Source: KNMI
February 23 » Cuba leases Guantánamo Bay to the United States "in perpetuity".
May 29 » In the May Coup, Alexander I, King of Serbia, and Queen Draga, are assassinated in Belgrade by the Black Hand (Crna Ruka) organization.
June 16 » The Ford Motor Company is incorporated.
June 19 » Benito Mussolini, at the time a radical Socialist, is arrested by Bern police for advocating a violent general strike.
August 2 » The Ilinden–Preobrazhenie Uprising against the Ottoman Empire begins.
September 11 » The first race at the Milwaukee Mile in West Allis, Wisconsin is held. It is the oldest major speedway in the world.
Day of death May 12, 1950
The temperature on May 12, 1950 was between 9.1 °C and 23.4 °C and averaged 16.5 °C. There was 14.2 hours of sunshine (92%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
March 12 » The Llandow air disaster kills 80 people when the aircraft they are travelling in crashes near Sigingstone, Wales. At the time this was the world's deadliest air disaster.
May 19 » Egypt announces that the Suez Canal is closed to Israeli ships and commerce.
June 3 » Herzog and Lachenal of the French Annapurna expedition become the first climbers to reach the summit of an 8,000-metre peak.
September 26 » Korean War: United Nations troops recapture Seoul from North Korean forces.
October 19 » China defeats the Tibetan Army at Chambo.
October 19 » Korean War: The Battle of Pyongyang ends in a United Nations victory. Hours later, the Chinese Army begins crossing the border into Korea.
When copying data from this family tree, please include a reference to the origin: J. van Broekhoven, "Database Van Broekhoven", database, Genealogy Online (https://www.genealogieonline.nl/database-van-broekhoven/I53304.php : accessed February 19, 2026), "Joannes Petrus van Helvert (1880-1950)".
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