- 1279 Discovery of a sarcophagus supposedly containing the body of Mary Magdalene in the crypt of the Church of Saint-Maximin in southeastern France
- 1897 Rudolph Dirks' first "The Katzenjammer Kids" cartoon strip appears in the New York Journal
First Marconi Transmission
1901 Guglielmo Marconi receives the first wireless signal, the Morse code letter "S," from England at a receiver on Signal Hill in Newfoundland
- 1925 Arthur Heinman coins the term "motel" from "motor hotel" and opens the Motel Inn in San Luis Obispo
- 1930 Baseball Rules Committee greatly revises the rule book; a ball bouncing into the stands is now a ground-rule double, not a home run
- 1937 NBC and RCA send the first mobile TV vans onto the streets of New York
- 1939 First commercial manufacture of nylon yarn in Seaford, Delaware
- 1955 The first prototype of the hovercraft is patented by British engineer Christoper Cockerell
- 1957 UA Air Force Major Adrian Drew flies 1,943 km/h in a modified McDonnell F-101A-5-MC Voodoo over Edwards Air Force Base, California
- 1957 Willem J. Kolff and his team at Ohio's Cleveland Clinic remove the heart from a dog and replace it with a pneumatic pump, which keeps the dog alive for 90 minutes, proving the feasibility of the artificial heart
Ashe 1st Black No. 1
1968 Arthur Ashe becomes the first African American tennis player to be ranked No. 1
- 1980 Apple makes its initial public offering on the US stock market; 38 years later, it becomes the first US company valued at over $1 trillion, first over $2 trillion two years after that, and first over $3 trillion three years after that
- 1997 Japanese train builders (Maglev) claim a world speed record of 332 mph (534.3 km/h)
- 2004 On This Day launches MusicOrb.com and TodayinSport.com, separate sites for music and sports history, now its music and sport channels
- 2019 The deepest point on land on Earth is identified under Denman Glacier, East Antarctica, at 3.5 km (11,500 ft) below sea level
- 2019 Three Scottish brothers, Ewan (27), Jamie (26), and Lachlan (21) MacLean, depart in a rowboat from La Gomera in the Canary Islands to cross the Atlantic Ocean, headed for the Caribbean Islands
