May 9th, 1721 was a Friday.
April 21st, 1721 - May 21st, 1721
Why not celebrate an alternative birthday? In 341 days, exactly on April 5th, 2025, people who were born on May 9th, 1721 will be 111,000 days old!
French mathematician, inventor of descriptive geometry and father of differential geometry (1746-1818)
*May 9th, 1746, Beaune †July 28th, 1818, ParisFounder of the German automobile company Adam Opel AG
*May 9th, 1837, Rüsselsheim am Main †September 8th, 1895, Rüsselsheim am MainSwiss classical philologist (1843-1918)
*May 9th, 1843, Zürich †August 27th, 1918, ZürichNorwegian musicologist and educator
*May 9th, 1875, Ringsaker Municipality †August 5th, 1976, OsloIrish-American playwright and actor (1814-1880)
*May 9th, 1814, Dublin †June 7th, 1880, New York CityBritish actress and politician (1936–2023)
*May 9th, 1936, Birkenhead †June 15th, 2023, Blackheath18th-century poet and author from Scotland
*March 19th, 1721, Cardross †September 17th, 1771, LivornoChief mistress of Louis XV of France (1721-1764)
*December 29th, 1721, Paris †April 15th, 1764, VersaillesGerman scholar (1721-1740)
*January 19th, 1721, Schwabach †October 5th, 1740, Halle (Saale)French statesman (1721-1794)
*December 6th, 1721, Paris †April 22nd, 1794, ParisEarly American lawyer and politician, Founding Father of the United States (1721-1793)
*April 19th, 1721, Newton †July 23rd, 1793, New HavenPrince of Schwarzburg-Rudolstadt (1721-1767)
*January 8th, 1721, Rudolstadt †July 10th, 1767, RudolstadtEnglish poet and physician
*November 9th, 1721, Newcastle upon Tyne †June 23rd, 1770, LondonGerman politician (1721-1798)
*December 12th, 1721, Kahren †December 30th, 1798, DresdenGerman general
*February 3rd, 1721, Kalkar †August 27th, 1773, OławaGerman theologian
*April 3rd, 1721, Salzdahlum †December 10th, 1792, WolfenbüttelGerman Archdeacon and parson (1721-1797)
*January 1st, 1721, Berlin †January 1st, 1797, BerlinAmerican judge and politician
*September 14th, 1721, Windham †May 13th, 1807, WindhamBritish politician (1721-1803)
*August 4th, 1721, Swynnerton †October 26th, 1803, Trentham GardensGerman professor of botany and chemistry (1721-1768)
*August 19th, 1721, Tübingen †May 9th, 1768, TübingenGerman noble (1721-1774)
*March 9th, 1721, Ribeauvillé †March 30th, 1774, DarmstadtFixed holidays (Christian feast day, Commemoration of the end of the German occupation of the Channel Islands related observances, Victory Day observances, celebration of the Soviet Union victory over Nazi Germany) which are celebrated on May 9th.
M = 1000 | D = 500 | C = 100 | X = 10 | IX = 9 | V = 5 | I = 1 |
No: With 365 days 1721 is a normal year and no leap year.