April 6 » Oscar Wilde is arrested in the Cadogan Hotel, London, after losing a libel case against the Marquess of Queensberry.
May 25 » The Republic of Formosa is formed, with Tang Jingsong as its president.
June 11 » Paris–Bordeaux–Paris, sometimes called the first automobile race in history or the "first motor race", takes place.
November 8 » While experimenting with electricity, Wilhelm Röntgen discovers the X-ray.
November 27 » At the Swedish–Norwegian Club in Paris, Alfred Nobel signs his last will and testament, setting aside his estate to establish the Nobel Prize after he dies.
December 28 » The Lumière brothers perform for their first paying audience at the Grand Cafe in Boulevard des Capucines.
Day of marriage August 20, 1913
The temperature on August 20, 1913 was between 10.3 °C and 18.3 °C and averaged 14.4 °C. There was 1.3 hours of sunshine (9%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. Source: KNMI
In The Netherlands , there was from February 12, 1908 to August 29, 1913 the cabinet Heemskerk, with Mr. Th. Heemskerk (AR) as prime minister.
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
February 3 » The Sixteenth Amendment to the United States Constitution is ratified, authorizing the Federal government to impose and collect an income tax.
February 21 » Ioannina is incorporated into the Greek state after the Balkan Wars.
August 16 » Completion of the Royal Navy battlecruiser HMSQueen Mary.
August 16 » Tōhoku Imperial University of Japan (modern day Tohoku University) becomes the first university in Japan to admit female students.
August 28 » Queen Wilhelmina opens the Peace Palace in The Hague.
December 17 » A spur of the Shaker Heights streetcar line opens, the first line of the eventual Cleveland RTA Rapid Transit system.
Day of death July 21, 1967
The temperature on July 21, 1967 was between 10.0 °C and 21.8 °C and averaged 16.8 °C. There was 0.4 mm of rain during 0.2 hours. There was 7.3 hours of sunshine (45%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
January 6 » Vietnam War: United States Marine Corps and ARVN troops launch "Operation Deckhouse Five" in the Mekong River delta.
April 4 » Martin Luther King Jr. delivers his "Beyond Vietnam: A Time to Break Silence" speech in New York City's Riverside Church.
April 27 » Expo 67 officially opens in Montreal, Quebec, Canada with a large opening ceremony broadcast around the world. It opens to the public the next day.
November 30 » The Pakistan Peoples Party is founded by Zulfikar Ali Bhutto, who becomes its first chairman.
December 6 » Adrian Kantrowitz performs the first human heart transplant in the United States.
December 20 » A Pennsylvania Railroad Budd Metroliner exceeds 155mph on their New York Division, also present day Amtrak's Northeast Corridor.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I3555.php : accessed February 14, 2026), "Hendrika Willemina Verra (1895-1967)".
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