- 1847 First US postage stamps go on sale, 5 cent Franklin and 10 cent Washington, NYC
- 1859 First intercollegiate baseball game, Amherst beats Williams 66-32 in Pittsfield, Massachusetts
- 1874 First zoo in the United States opens in Philadelphia, Pennsylvania
- 1881 First international telephone conversation, between Calais, Maine, to St. Stephen, New Brunswick
- 1908 "SOS" (· · · – – – · · ·) distress signal becomes the worldwide standard for help
- 1916 First of four fatal Jersey Shore shark attacks occurs at Beach Haven when Charles Vansant (25) bleeds to death, challenging previous scientific belief that sharks never harm humans and sparking popular fear over sharks, which persists today
- 1923 First permanent radio network: AT&T (WEAF NY & WMAF Mass)
Hergé's First Comic Strip
1926 Belgian scouting magazine Le Boy Scout Belge publishes "The Adventures of Totor" by cartoonist Hergé, his first comic strip series and a precursor to Tintin
- 1931 Ice vending machines introduced in Los Angeles 25 lbs, 15 cents
- 1934 First x-ray photo of entire body, taken by Arthur Fuchs of Eastman-Kodak Company in Rochester, New York
- 1941 Bulova Watch Company pays $9 for the first ever television commercial, which airs during a broadcast of Brooklyn Dodgers-Philadelphia Phillies baseball game
- 1963 ZIP (Zone Improvement Plan) Codes are introduced for United States mail
- 2023 Euclid telescope launches into space on board Falcon-9 rocket from Cape Canaveral on mission to create 3D map of the cosmos and search for dark matter and dark energy [1]
- 2024 Aboriginal ritual uncovered in a cave in Cloggs Cave, Victoria, Australia, maybe humankind's oldest continuous cultural ritual spanning 500 generations and 12,000 years [1]
