May 21st, 1256

Born on May 21st, 1256

Age in days, weeks and months
Wow, over 281,000 days old!

Why not celebrate an alternative birthday? In 699 days, exactly on June 23rd, 2028, people who were born on May 21st, 1256 will be 282,000 days old!

... in seconds, minutes and hours

What happened on May 21st?

May 21st, 2014

A Taiwanese man carried out a stabbing spree on a Taipei Metro train, killing four people and injuring 24 others.

May 21st, 2005

The world's tallest roller coaster, Kingda Ka, opened at Six Flags Great Adventure in Jackson, New Jersey, U.S.

May 21st, 1998

Indonesian president Suharto resigned after a collapse of support for his presidency amid economic and political crises, ending 32 years in power.

May 21st, 1991

Former Indian prime minister Rajiv Gandhi was assassinated by a suicide bomber in Sriperumbudur, Tamil Nadu.

May 21st, 1946

While working with a mass of plutonium known as the demon core, Manhattan Project physicist Louis Slotin accidentally exposed himself to a lethal dose of hard radiation, making him the second victim of a criticality accident in history.

May 21st, 1927

Aboard the Spirit of St. Louis, American aviator Charles Lindbergh (pictured) completed the first solo non-stop transatlantic flight, flying from Roosevelt Field near New York City to Paris–Le Bourget Airport.

May 21st, 1924

University of Chicago students Nathan Leopold Jr. and Richard Loeb (both pictured) murdered a 14-year-old boy in a thrill killing out of a desire to commit a "perfect crime".

May 21st, 1138

The Crusades: The siege of Shaizar ended, and the Emir of Shaizar became a vassal of the Byzantine Empire.

May 21st, 1917

The Imperial War Graves Commission was established by royal charter to mark, record and maintain the graves and places of commemoration of British Empire military forces.

May 21st, 1911

Mexican president Porfirio Díaz and the revolutionary Francisco I. Madero signed the Treaty of Ciudad Juárez to end hostilities between each other's forces, concluding the initial phase of the Mexican Revolution.

May 21st, 1894

The Manchester Ship Canal, linking Manchester in North West England to the Irish Sea, officially opened, becoming the world's largest navigation canal at the time.

May 21st, 1925

The opera Doktor Faust, unfinished when composer Ferruccio Busoni (pictured) died, was premiered in Dresden.

May 21st, 1864

American Civil War: The inconclusive Battle of Spotsylvania Court House in Virginia ended with combined Union and Confederate casualties totaling around 31,000.

May 21st, 1856

A crowd of about 800 pro-slavery Americans ransacked the town of Lawrence, Kansas.

May 21st, 1851

The Congress of Colombia passed a law abolishing slavery in the country, to take effect at the beginning of the new year.

Public holidays on May 21st

Fixed holidays (Christian feast day) which are celebrated on May 21st.

Date as a Roman numeral / digit

Leap year

Yes: 1256 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 1256