- 1595 Nomenclator of Leiden University Library appears, the first printed catalog of an institutional library.
- 1738 John Wesley is converted, launching the Methodist movement; the day is celebrated annually by Methodists as Aldersgate Day.
- 1844 Samuel Morse taps out "What hath God wrought" in the world's 1st telegraph message
- 1941 German battleship Bismarck sinks the British battle cruiser HMS Hood; 1,416 die, 3 survive
- 1988 Section 28 is passed as law by Parliament in the United Kingdom which prohibited the promotion of homosexuality. Repealed 2001/2004.
"Mary Had A Little Lamb" by Sarah Josepha Hale is first published by Boston firm Marsh, Capen & Lyon
On This Day in 1830