May 31st, 1216

Born on May 31st, 1216

Age in days, weeks and months
Wow, over 295,000 days old!

Why not celebrate an alternative birthday? In 98 days, exactly on November 1st, 2026, people who were born on May 31st, 1216 will be 296,000 days old!

... in seconds, minutes and hours

What happened on May 31st?

May 31st, 2013

An extremely large, powerful, and erratic tornado struck Central Oklahoma, killing eight people and injuring more than 150 others.

May 31st, 2009

American physician George Tiller, one of the few doctors in the country who performed late-term abortions, was shot and killed by Scott Roeder, an anti-abortion activist.

May 31st, 2005

A Vanity Fair article revealed that the secret informant known as "Deep Throat", who had provided information about the Watergate scandal, was former FBI associate director Mark Felt (pictured).

May 31st, 1981

An organized mob of police and government-sponsored Sinhalese paramilitary forces began three days of attacks that led to the burning of the Jaffna Library in Sri Lanka.

May 31st, 1941

The United Kingdom completed its re-occupation of Iraq, returning Abd al-Ilah to power as regent for Faisal II.

May 31st, 1902

The Second Boer War came to an end with the signing of the Treaty of Vereeniging in Pretoria, South Africa.

May 31st, 1879

Gilmore's Garden in New York City was renamed Madison Square Garden, the city's first venue to use that name.

May 31st, 1862

American Civil War: Confederate troops under Joseph E. Johnston and G. W. Smith engaged Union forces under George B. McClellan at the Battle of Seven Pines outside Richmond, Virginia.

May 31st, 1775

American Revolution: The Committee of Safety of Mecklenburg County, North Carolina, adopted the Mecklenburg Resolves, which annulled and vacated all laws originating from the authority of the King or Parliament.

May 31st, 1468

Cardinal Bessarion (pictured) announced his donation of 746 Greek and Latin codices to the Republic of Venice, forming the Biblioteca Marciana.

May 31st, 1293

Majapahit forces under Raden Wijaya won a major victory in the Mongol invasion of Java, now considered to be the founding date of the Indonesian city of Surabaya.

May 31st, 1223

Mongol invasion of Kievan Rus': Mongol forces defeated a Kievan Rus' army at the Battle of the Kalka River in present-day Ukraine.

May 31st, 1215

A Mongol army under Genghis Khan captures Zhongdu (modern Beijing), the capital of the Jin dynasty.

May 31st, 0455

Petronius Maximus, the ruler of the Western Roman Empire, was stoned to death by a mob as he fled Rome ahead of the arrival of a Vandal force that sacked the city.

May 31st, 1890

The Ulm Minster, the world's tallest church building, is completed in Ulm, Germany.

Public holidays on May 31st

Fixed holidays (Christian feast day) which are celebrated on May 31st.

Date as a Roman numeral / digit

Leap year

Yes: 1216 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).

Calendar
May 1216