Donald Trump's second impeachment trial began.
A US submarine collided with a Japanese high-school fishing training ship off the coast of Hawaii.
The Simpsons aired its 167th episode, making it the longest-running animation in TV history.
Irina Privalova ran the world record female indoor 50-meter run in just 5.96 seconds.
Five Pharaoh sculptures were discovered in the temple of Luxor.
Halley's Comet was last seen from Earth. It only orbits the Earth once every 75 to 76 years.
The Beatles made their first appearance on the ''Ed Sullivan Show" and pulled in a record-breaking 73.7 million viewers.
The Soviet R-7 Semyorka, the world's first Intercontinental ballistic missile, became operational.
President Franklin D. Roosevelt signed a 48-hour working week order to increase production during World War II.
Daylight Saving started in the US.
A record low temperature was recorded and reached a bone-chilling -15°F in Central Park, New York City.
Milton S. Hershey founded Hershey's Chocolate Company in Lancaster, Pennsylvania, US.
Martial Law was declared in Seattle by President Grover Cleveland due to anti-Chinese unrest.
President Ulysses S. authorized the establishment of the United States National Weather Service (NWS).
