May 31st, 1240 was a Thursday.
May 22nd, 1240 - June 21st, 1240
Why not celebrate an alternative birthday? In 664 days, exactly on March 12th, 2026, people who were born on May 31st, 1240 will be 287,000 days old!
King of Majorca
*May 31st, 1243, Montpellier †May 29th, 1311, Palma de MallorcaFounder and first khan of the Mongol Empire
*May 31st, 1162, Delüün Boldog †August 18th, 1227, YinchuanNoblewoman; Mother of King Henry VII
*May 31st, 1443, Bedfordshire †June 29th, 1509, WestminsterGerman biologist
*May 31st, 1922, Potsdam †April 16th, 2016, Freiburg im BreisgauFrench poet and diplomat
*May 31st, 1887, Pointe-à-Pitre †September 20th, 1975, HyèresFrench economist (1911–2010)
*May 31st, 1911, Paris †October 9th, 2010, Saint-CloudKing of France 1285-1314
*May 31st, 1268, Fontainebleau †November 29th, 1314, FontainebleauAmerican poet, essayist and journalist
*May 31st, 1819, West Hills †March 26th, 1892, CamdenPope of the Catholic Church from 1922 to 1939
*May 31st, 1857, Desio †February 10th, 1939, Vatican CityBritish-American historian (1916–2018)
*May 31st, 1916, London †May 19th, 2018, Voorhees TownshipFrench painter (1594-1665)
*May 31st, 1594, Les Andelys †November 19th, 1665, RomeTsar of Russia (1557-1598)
*May 31st, 1557, Pereslavl-Zalessky †January 7th, 1598, MoscowBelarusian investigative journalist and non-fiction prose writer
*May 31st, 1948, Ivano-FrankivskEnglish actor (1927-2017)
*May 31st, 1927, Newcastle upon Tyne †July 3rd, 2017, BrightonAmerican physicist (1931-2019)
*May 31st, 1931, Oak Park †July 27th, 2019, TallahasseeGerman author and theologian (1915-2003)
*May 31st, 1915, Kiel †November 1st, 2003, SoestBrazilian actor, producer and director
*May 31st, 1938, São Paulo †October 14th, 2015, Rio de JaneiroChinese-American experimental physicist
*May 31st, 1912, Taicang †February 16th, 1997, New York CityFixed holidays (Christian feast day) which are celebrated on May 31st.
M = 1000 | C = 100 | XL = 40 | X = 10 | V = 5 | I = 1 |
Yes: 1240 is a leap year, therefore has a 29th of February with an additional leap day and a total of 366 days (instead of the usual 365 days in a normal year).