July 21st, 1172

Born on July 21st, 1172

Age in days, weeks and months
Wow, over 311,000 days old!

Why not celebrate an alternative birthday? In 78 days, exactly on October 12th, 2026, people who were born on July 21st, 1172 will be 312,000 days old!

... in seconds, minutes and hours

What happened on July 21st?

July 21st, 2019

People returning from anti-extradition bill protests were attacked (pictured) by suspected triad members in Yuen Long, Hong Kong, leaving 45 people injured.

July 21st, 2007

Harry Potter and the Deathly Hallows, the final book in the popular Harry Potter series by J. K. Rowling, was released and sold 15 million copies in its first 24 hours, making it the fastest-selling book in history.

July 21st, 1990

The Taiwanese military ordered the deportation of dozens of illegal immigrants from mainland China in sealed boat holds, causing 25 deaths due to suffocation.

July 21st, 1977

Libyan forces carried out a raid at Sallum, sparking a four-day war with Egypt.

July 21st, 1972

The Troubles: The Provisional Irish Republican Army detonated twenty-two bombs throughout Belfast, Northern Ireland.

July 21st, 1960

Sirimavo Bandaranaike (pictured) was sworn in as prime minister of Ceylon, becoming the world's first democratically elected female head of government.

July 21st, 1959

The inaugural International Mathematical Olympiad, the leading mathematical competition for pre-university students, began in Romania.

July 21st, 1946

After weeks of unrest, rioters lynched Bolivian president Gualberto Villarroel, desecrating and hanging his corpse in the streets of La Paz.

July 21st, 1925

American high school biology teacher John T. Scopes was found guilty of violating Tennessee's Butler Act by teaching evolution in class.

July 21st, 1918

World War I: An Imperial German Navy U-boat opened fire on a small convoy of barges and defending aircraft near the American town of Orleans, Massachusetts.

July 21st, 1877

Much of central Pittsburgh, Pennsylvania, was burned and looted during the Great Railroad Strike of 1877.

July 21st, 1378

Unrepresented labourers revolted and violently took over the government of the Republic of Florence (depicted), demanding that they be granted political office.

July 21st, 0905

Louis III, Holy Roman Emperor, was captured and blinded during his attempt to restore Carolingian power over Italy by King Berengar I.

July 21st, 0365

A large earthquake occurred near Crete, triggering a tsunami, and causing widespread destruction around the eastern Mediterranean region.

July 21st, 0230

Pope Pontian began his pontificate, succeeding Urban I.

Public holidays on July 21st

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

Date as a Roman numeral / digit

Leap year

Yes: 1172 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
July 1172