- 1847 Samuel Colt sells his first revolver pistol to the United States government
- 1865 The New York Stock Exchange opens its first permanent headquarters at 10-12 Broad near Wall Street in New York City.
- 1959 Luna 1 (Mechta) becomes 1st craft to leave Earth's gravity
- 1961 Longest recorded strike ends-33 yrs-Danish barbers' assistants
- 2007 The 110th United States Congress convenes, electing Nancy Pelosi as the first female Speaker of the House in U.S. history.
4 wheeled roller skates patented by James Plimpton of NY
On January 4, 1863
- 1827 Naturalist and entomologist Thomas Say (39) secretly weds natural science illustrator Lucy Way Sistare (26)
- 1926 Composer Irving Berlin (37) weds heiress Ellin Mackay in a simple civil ceremony
- 1997 Czech Republic's first president Vaclav Havel (60) weds Czech actress Dagmar Havlova (43) in Prague, Czech Republic
- 1997 "Smothers Brothers" actor-singer Dick Smothers (58) weds Denby Franklin (47) in Las Vegas
- 2012 Roxy Music singer Bryan Ferry (66) weds PR executive Amanda Sheppard (29) in Turks and Caicos Island
- 2004 Britney Spears has her surprise marriage annulled less than 55 hours after tying the knot with childhood friend Jason Alexander at the Little White Wedding Chapel in Las Vegas
- 2008 Australian pop diva Natalie Imbruglia (32) and "Silverchair" frontman Daniel Johns (28) announce their divorce stating "we have simply grown apart through not being able to spend enough time together"