1919 – The Ukrainian People's Republic asks the Entente and the United States for help fighting the Bolsheviks.

1978 – The first computer bulletin board system is created (CBBS in Chicago).

1945 – The Alaska Equal Rights Act of 1945, the first anti-discrimination law in the United States, was signed into law.

2001 – The first draft of the complete human genome is published in Nature.

1972 – Sound recordings are granted U.S. federal copyright protection for the first time.

1946 – ENIAC, the first electronic general-purpose computer, is formally dedicated at the University of Pennsylvania in Philadelphia.

1990 – The Voyager 1 spacecraft takes the photograph of planet Earth that later becomes famous as Pale Blue Dot.

1989 – Iranian leader Ruhollah Khomeini issues a fatwa encouraging Muslims to kill Salman Rushdie, author of The Satanic Verses.

2021 – Former U.S. President Donald Trump is acquitted in his second impeachment trial.

2011 – For the first time in more than 100 years the Umatilla, an American Indian tribe, are able to hunt and harvest a bison just outside Yellowstone National Park, restoring a centuries-old tradition guaranteed by a treaty signed in 1855.

2008 – Australian Prime Minister Kevin Rudd makes a historic apology to the Indigenous Australians and the Stolen Generations.

2004 – The Harvard–Smithsonian Center for Astrophysics announces the discovery of the universe's largest known diamond, white dwarf star BPM 37093. Astronomers named this star "Lucy" after The Beatles' song "Lucy in the Sky with Diamonds".

1960 – With the success of a nuclear test codenamed "Gerboise Bleue", France becomes the fourth country to possess nuclear weapons.

2001 – NEAR Shoemaker spacecraft touches down in the "saddle" region of 433 Eros, becoming the first spacecraft to land on an asteroid.

1909 – The National Association for the Advancement of Colored People (NAACP) is founded.

1825 – The Creek cede the last of their lands in Georgia to the United States government by the Treaty of Indian Springs, and migrate west.

1404 – The Italian professor Galeazzo di Santa Sophie performed the first post-mortem autopsy for the purposes of teaching and demonstration at the Heiligen–Geist Spital in Vienna.

2020 – COVID-19 pandemic: The World Health Organization officially names the coronavirus outbreak as COVID-19, with the virus being designated SARS-CoV-2.

1990 – Nelson Mandela is released from Victor Verster Prison outside Cape Town, South Africa after 27 years as a political prisoner.

1963 — The Beatles recorded their first album Please Please Me