About the day » Saturday May 21, 1870Calender converter

• Adriana Wilhelmina Maria Anna Thie, Schiedam († 1936)
• Adam Gerrit van Rijsbergen, Hooge en Lage Zwaluwe, Noord-Brabant, The Netherlands († 1949)
• Aaltje Jans Kroezen, Hoogeveen, Drenthe, The Netherlands
• Anna Matilda Wilhelmina Proffe († 1945)
• Aaltje Algera, Wonseradeel († 1956)
• Anna Maria Krats, Groningen,, Groningen, Nederland († 1899)
• Amedeus Vyt, Temse († 1870)
• Anna Cornelia van Leeuwen, Heusden († 1870)
• Anna Margaretha van Saagsvelt, Amsterdam, Noord-Holland, Nederland
• Alberdina Elisabeth Koop, Amsterdam, Noord Holland, Nederland

• Adriaan van Bakel (41), Waalre, Noord-Brabant, Nederland
• Aaltje HILFERINK (67), Zelhem, Nederland, Gelderland, Halle
• Agnes Joanna Cambron (77), Vinderhoute
• Adriana Jacoba van der Kaaden (43), Pijnacker, 2641, Nederland
• Arie | Aary Gravesteijn (62), Overschie
• Aaltjen Hilferink (67), Halle/GL
• Adriana Lobbezoo (50), Kortgene
• Aary Gravesteijn (62), Overschie, Zuid-Holland, Nederland
• Arie Dirksz Gravesteijn (62), Overschie
• Adriana LOBBEZOO (50), Kortgene, Zeeland, Nederland

• 1856 » José Batlle y Ordóñez, Uruguayan journalist and politician, President of Uruguay († 1929)
• 1860 » Willem Einthoven, Indonesian-Dutch physician, physiologist, and academic, Nobel Prize laureate († 1927)
• 1861 » Abel Ayerza, Argentinian physician and academic († 1918)
• 1863 » Archduke Eugen of Austria († 1954)
• 1864 » Princess Stéphanie of Belgium († 1945)
• 1873 » Hans Berger, German neurologist and academic († 1941)
• 1878 » Glenn Curtiss, American cyclist and engineer († 1930)
• 1880 » Tudor Arghezi, Romanian journalist, author, and poet († 1967)
• 1884 » Manuel Pérez y Curis, Uruguayan poet and publisher († 1920)
• 1885 » Princess Sophie of Albania, (Princess Sophie of Schönburg-Waldenburg) († 1936)

• 1844 » Giuseppe Baini, Italian priest and composer (b. 1775)
• 1858 » José de la Riva Agüero, Peruvian soldier and politician, 1st President of Peru and 2nd President of North Peru (b. 1783)
• 1862 » John Drew, Irish-American actor and manager (b. 1827)
• 1879 » Arturo Prat, Chilean lawyer and commander (b. 1848)
• 1894 » Émile Henry, French anarchist (b. 1872)
• 1894 » August Kundt, German physicist and academic (b. 1839)
• 1895 » Franz von Suppé, Austrian composer and conductor (b. 1819)
• 1901 » Joseph Olivier, French rugby player (b. 1874)
• 1911 » Williamina Fleming, Scottish-American astronomer and academic (b. 1857)
• 1915 » Leonid Gobyato, Russian general and engineer (b. 1875)

1. Jan
2. Johannes
3. Cornelis
4. Hendrik
5. Pieter
6. Willem
7. Gerrit
8. Jacob
9. Petrus
10. Jacobus
11. Adrianus
12. Dirk
13. Arie
14. Klaas
15. Hendrikus
16. Gerardus

1. Maria
2. Johanna
3. Anna
4. Cornelia
5. Adriana
6. Elisabeth
7. Catharina
8. Hendrika
9. Aaltje
10. Wilhelmina
11. Neeltje
12. Trijntje
13. Grietje
14. Antje
15. Jacoba
16. Petronella

• Koning Willem III (Huis van Oranje-Nassau) was from 1849 till 1890 sovereign of the Netherlands (also known as Koninkrijk der Nederlanden)
• From June 4, 1868 till January 4, 1871 the Netherlands had a cabinet Van Bosse - Fock with the prime ministers Mr. P.P. van Bosse (liberaal) and Mr. C. Fock (liberaal).
• The Netherlands had about 3.6 million citizens.
• February 9 » US president Ulysses S. Grant signs a joint resolution of Congress establishing the U.S. Weather Bureau.
• February 27 » The current flag of Japan is first adopted as the national flag for Japanese merchant ships.
• April 13 » The New York City Metropolitan Museum of Art is founded.
• July 19 » Franco-Prussian War: France declares war on Prussia.
• August 6 » Franco-Prussian War: The Battle of Spicheren is fought, resulting in a Prussian victory.
• September 3 » Franco-Prussian War: The Siege of Metz begins, resulting in a decisive Prussian victory on October 23.

The temperature on May 21, 1870 was about 24.8 °C. The air pressure was 2 kgf/m² and came mainly from the west-southwest. The airpressure was 77 cm mercury. The atmospheric humidity was 59%.