June 18th, 1256

Born on June 18th, 1256

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

Why not celebrate an alternative birthday? In 745 days, exactly on July 21st, 2028, people who were born on June 18th, 1256 will be 282,000 days old!

... in seconds, minutes and hours

What happened on June 18th?

June 18th, 1954

Carlos Castillo Armas led a CIA-sponsored invasion force across the Guatemalan border, beginning the 1954 Guatemalan coup d'état.

June 18th, 1953

A Douglas C-124 Globemaster II aircraft crashed just after takeoff from Tachikawa, Japan, killing all 129 people on board.

June 18th, 1940

World War II: Charles de Gaulle gave his Appeal of 18 June speech, often considered to be the origin of the French Resistance.

June 18th, 1858

Charles Darwin received a manuscript by fellow naturalist Alfred Russel Wallace on natural selection, which encouraged him to publish his own theory of evolution.

June 18th, 1815

War of the Seventh Coalition: Napoleon fought and lost his final battle, the Battle of Waterloo (depicted), in present-day Belgium.

June 18th, 1757

Third Silesian War: The Austrian victory at the Battle of Kolín forced Prussian leader Frederick the Great to give up the Siege of Prague and retreat to Saxony.

June 18th, 0618

Sui–Tang transition: Chinese governor Li Yuan (pictured) declared himself emperor, establishing the Tang dynasty.

June 18th, 1898

The Cadaver Tomb of René of Chalon (pictured) in Bar-le-Duc, France, was designated a monument historique.

June 18th, 2023

The Titan submersible imploded during a dive to the RMS Titanic wreck, killing all five people aboard.

June 18th, 2012

Salman bin Abdulaziz Al Saud was appointed the crown prince of Saudi Arabia.

June 18th, 2009

The Lunar Reconnaissance Orbiter, NASA's first mission to the Moon in more than ten years, was launched from Cape Canaveral, Florida.

June 18th, 1994

The Troubles: Ulster Volunteer Force members attacked a crowded bar in Loughinisland, Northern Ireland, with assault rifles, killing six people.

June 18th, 1983

Aboard Space Shuttle Challenger, astronaut Sally Ride became the first American woman and third one overall in space.

June 18th, 1982

The body of Italian banker Roberto Calvi, nicknamed "God's Banker" due to his close association with the Holy See, was found hanging from scaffolding beneath London's Blackfriars Bridge.

June 18th, 1981

The Lockheed F-117 Nighthawk, the first operational aircraft to be designed around stealth technology, made its maiden flight.

Public holidays on June 18th

Fixed holidays (Christian feast day) which are celebrated on June 18th.

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
June 1256