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1913

Raja Harishchandra, the first Indian feature-length film, was released

Raja Harishchandra, the first Indian feature-length film, was released.

1791

The Great Sejm of the Polish–Lithuanian Commonwealth ratified the first codified national constitution in Europe

The Great Sejm of the Polish–Lithuanian Commonwealth ratified the first codified national constitution in Europe.

2000

Ken Livingstone took office as the first mayor of London

Ken Livingstone took office as the first mayor of London.

1979

Margaret Thatcher became the first female prime minister of the United Kingdom

Margaret Thatcher became the first female prime minister of the United Kingdom.

1974

An all-female Japanese team reached the summit of Manaslu in the Himalayas, becoming the first women to climb a peak hig

An all-female Japanese team reached the summit of Manaslu in the Himalayas, becoming the first women to climb a peak higher than 8,000 metres (26,247 ft) above sea level.

1776

American Revolution: The Colony of Rhode Island and Providence Plantations became the first of the Thirteen Colonies to

American Revolution: The Colony of Rhode Island and Providence Plantations became the first of the Thirteen Colonies to renounce its allegiance to the British Crown.

1992

The Twenty-seventh Amendment to the United States Constitution was ratified, 202 years after it was first proposed

The Twenty-seventh Amendment to the United States Constitution was ratified, 202 years after it was first proposed.

1904

Pitching for the Boston Americans, Cy Young threw the first perfect game in modern professional baseball

Pitching for the Boston Americans, Cy Young threw the first perfect game in modern professional baseball.

1954

At Oxford's Iffley Road Track, English runner Roger Bannister became the first person to run the mile in under four minu

At Oxford's Iffley Road Track, English runner Roger Bannister became the first person to run the mile in under four minutes.

1941

American entertainer Bob Hope performed his first show with the United Service Organizations, beginning a 50-year involv

American entertainer Bob Hope performed his first show with the United Service Organizations, beginning a 50-year involvement with them.

1937

Employees at Fleischer Studios in New York City went on strike in the animation industry's first major labor strike

Employees at Fleischer Studios in New York City went on strike in the animation industry's first major labor strike.

1976

Great American Revolution, the first steel coaster with a vertical loop, opened at Six Flags Magic Mountain, California

Great American Revolution, the first steel coaster with a vertical loop, opened at Six Flags Magic Mountain, California.

1964

Ngô Đình Cẩn, a younger brother and the confidant of South Vietnam's first president, Ngô Đình Diệm, was executed by Ngu

Ngô Đình Cẩn, a younger brother and the confidant of South Vietnam's first president, Ngô Đình Diệm, was executed by Nguyễn Khánh's military junta.

1998

India began the Pokhran-II nuclear-weapons test, its first since the Smiling Buddha test 24 years earlier

India began the Pokhran-II nuclear-weapons test, its first since the Smiling Buddha test 24 years earlier.

1997

Deep Blue defeated Garry Kasparov in six games to become the first chess computer to win a match against a world champio

Deep Blue defeated Garry Kasparov in six games to become the first chess computer to win a match against a world champion.

28 BC

Chinese astronomers during the Han dynasty made the first precisely dated observation of a sunspot

Chinese astronomers during the Han dynasty made the first precisely dated observation of a sunspot.

2022

The Event Horizon Telescope released the first image of Sagittarius A*

The Event Horizon Telescope released the first image of Sagittarius A*.

1941

German engineer Konrad Zuse presented the Z3, the first working programmable and fully automatic computer, to an audienc

German engineer Konrad Zuse presented the Z3, the first working programmable and fully automatic computer, to an audience of scientists in Berlin.

1926

The crew of the airship Norge (pictured), led by Roald Amundsen, became the first people to make a verified trip to the

The crew of the airship Norge (pictured), led by Roald Amundsen, became the first people to make a verified trip to the North Pole.

2017

Eurovision Song Contest: Portugal won the contest for the first time, with the song "Amar pelos dois," performed by Salv

Eurovision Song Contest: Portugal won the contest for the first time, with the song "Amar pelos dois," performed by Salvador Sobral (pictured).