The temperature on May 1, 1887 was about 10.5 °C. The air pressure was 12 kgf/m2 and came mainly from the northeast. The airpressure was 76 cm mercury. The atmospheric humidity was 48%. 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.
April 4 » Argonia, Kansas elects Susanna M. Salter as the first female mayor in the United States.
July 4 » The founder of Pakistan, Quaid-i-Azam Muhammad Ali Jinnah, joins Sindh-Madrasa-tul-Islam, Karachi.
July 6 » David Kalākaua, monarch of the Kingdom of Hawaii, is forced to sign the Bayonet Constitution, which transfers much of the king's authority to the Legislature of the Kingdom of Hawaii.
July 26 » Publication of the Unua Libro, founding the Esperanto movement.
September 5 » A fire at the Theatre Royal, Exeter, kills 186.
November 9 » The United States receives rights to Pearl Harbor, Hawaii.
Day of marriage May 23, 1910
The temperature on May 23, 1910 was between 10.8 °C and 23.7 °C and averaged 17.6 °C. There was 12.0 hours of sunshine (75%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
June 19 » The first Father's Day is celebrated in Spokane, Washington.
July 24 » The Ottoman Empire captures the city of Shkodër, putting down the Albanian Revolt of 1910.
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.
October 1 » A large bomb destroys the Los Angeles Times building, killing 21.
November 7 » The first air freight shipment (from Dayton, Ohio, to Columbus, Ohio) is undertaken by the Wright brothers and department store owner Max Moorehouse.
When copying data from this family tree, please include a reference to the origin: Peeters Mathieu, "FutureHistory", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-riske/I28075.php : accessed February 8, 2026), "Helena Charlotta Augusta van Heck (1887-????)".
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