May 9th, 1423 was a Friday.
April 21st, 1423 - May 21st, 1423
Why not celebrate an alternative birthday? In 493 days, exactly on September 9th, 2025, people who were born on May 9th, 1423 will be 220,000 days old!
Founder of the German automobile company Adam Opel AG
*May 9th, 1837, Rüsselsheim am Main †September 8th, 1895, Rüsselsheim am MainNorwegian musicologist and educator
*May 9th, 1875, Ringsaker Municipality †August 5th, 1976, OsloSwiss classical philologist (1843-1918)
*May 9th, 1843, Zürich †August 27th, 1918, ZürichFrench mathematician, inventor of descriptive geometry and father of differential geometry (1746-1818)
*May 9th, 1746, Beaune †July 28th, 1818, ParisBritish actress and politician (1936–2023)
*May 9th, 1936, Birkenhead †June 15th, 2023, BlackheathKing of France from 1461 to 1483
*July 3rd, 1423, Bourges †August 30th, 1483, Château de Plessis-lez-ToursItalian humanist, architect and mathematician
*July 6th, 1423, Florence †May 26th, 1497, FlorenceKing of Naples
*June 2nd, 1423, Valencia †January 28th, 1494, Kingdom of NaplesCount of Foix
*February 26th, 1423, Petegem-aan-de-Schelde †July 10th, 1472, Orreaga-RoncesvallesCount of Saarbrücken (1442-1472)
*April 4th, 1423, Kirchheimbolanden †July 25th, 1472, Vaihingen an der EnzLord Privy Seal; Lord Chancellor; Bishop of Rochester; Bishop of Lincoln; Archbishop of York
*August 24th, 1423, Rotherham †May 29th, 1500, Cawood CastlePrincess of Asturias
*September 10th, 1423, Valladolid †August 22nd, 1425, CastromonteAustrian mathematician and astronomer (1423-1461)
*May 30th, 1423, Peuerbach †April 8th, 1461, ViennaFixed 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 | CD = 400 | X = 10 | IX = 9 | V = 5 | I = 1 |
No: With 365 days 1423 is a normal year and no leap year.