The temperature on May 21, 1887 was about 5.1 °C. The air pressure was 10 kgf/m2 and came mainly from the south-southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 78%. 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.
January 20 » The United States Senate allows the Navy to lease Pearl Harbor as a naval base.
April 10 » On Easter Sunday, Pope Leo XIII authorizes the establishment of the Catholic University of America.
July 4 » The founder of Pakistan, Quaid-i-Azam Muhammad Ali Jinnah, joins Sindh-Madrasa-tul-Islam, Karachi.
July 26 » Publication of the Unua Libro, founding the Esperanto movement.
September 5 » A fire at the Theatre Royal, Exeter, kills 186.
November 11 » August Spies, Albert Parsons, Adolph Fischer and George Engel are executed as a result of the Haymarket affair.
Day of marriage April 30, 1910
The temperature on April 30, 1910 was between 1.1 °C and 11.3 °C and averaged 6.5 °C. There was 9.2 hours of sunshine (62%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
January 13 » The first public radio broadcast takes place; a live performance of the operas Cavalleria rusticana and Pagliacci are sent out over the airwaves from the Metropolitan Opera House in New York.
July 4 » The Johnson–Jeffries riots occur after African-American boxer Jack Johnson knocks out white boxer Jim Jeffries in the 15th round. Between 11 and 26 people are killed and hundreds more injured.
August 22 » Korea is annexed by Japan with the signing of the Japan–Korea Treaty of 1910, beginning a period of Japanese rule of Korea that lasted until the end of World War II.
September 20 » The ocean liner SSFrance, later known as the "Versailles of the Atlantic", is launched.
October 5 » In a revolution in Portugal the monarchy is overthrown and a republic is declared.
October 21 » HMSNiobe arrives in Halifax Harbour to become the first ship of the Royal Canadian Navy.
Day of death May 1, 1968
The temperature on May 1, 1968 was between 6.9 °C and 14.0 °C and averaged 10.0 °C. There was 4.4 hours of sunshine (30%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 24 » Vietnam War: The 1st Australian Task Force launches Operation Coburg against the North Vietnamese Army and Viet Cong during wider fighting around Long Bình and Biên Hòa.
February 17 » In Springfield, Massachusetts, the Naismith Memorial Basketball Hall of Fame opens.
April 4 » Apollo program: NASA launches Apollo 6.
July 17 » Abdul Rahman Arif is overthrown and the Ba'ath Party is installed as the governing power in Iraq with Ahmed Hassan al-Bakr as the new Iraqi President.
July 18 » Intel is founded in Mountain View, California.
October 16 » Tommie Smith and John Carlos are ejected from the US Olympic team for participating in the Olympics Black Power salute.
When copying data from this family tree, please include a reference to the origin: Elly Gelderman, "Family tree Gelderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-gelderman/I3239.php : accessed January 17, 2026), "Arend Vorsthof (1887-1968)".
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