September 22nd

2011
CERN scientists announce their discovery of neutrinos breaking the speed of light.
Faster-than-light neutrino anomaly
2008
The U.S. Mint unveiled the first changes to the penny in 50 years, with Abraham Lincoln's portrait still on the front, but new designs replacing the Lincoln Memorial on the back.
Lincoln cent
2005
John Roberts' nomination as chief justice cleared the Senate Judiciary Committee on a 13-5 vote.
Wikipedia:Reference desk archive/Humanities/May 2006
1995
Time Warner struck a $7.5 billion deal to buy Turner Broadcasting System Inc.
Metro-Goldwyn-Mayer
1989
Songwriter Irving Berlin died in New York City at age 101.
Irving Berlin
1980
Iran-Iraq War begins with Iraq invading Iran. It is thought to be one of the 20th century's deadliest and longest conventional war. It ended 7 years later with no decisive victory and massive losses, both in terms of human lives and in terms of economy to both sides.
Iran–Iraq War
1979
The American-run Vela satellite detects a series of bright flashes over the Indian Ocean. The flashes were thought to be associated with atmospheric nuclear explosions. Some experts theorized that they were caused by joint Israeli and South African nuclear exercises. The governments of both countries denied this and to date it hasn't been confirmed whether the flashes were indeed nuclear explosions, and who was responsible for them.
Gamma-ray burst
1975
Assassination attempt on US President Gerald Ford is foiled. FBI informant Sara Jane Moore's attempt to assassinate the president in San Francisco failed due to a faulty gun and the efforts of ex-FBI agent Oliver Sipple who tackled her.
Sara Jane Moore
1969
Willie Mays of the San Francisco Giants hit his 600th career home run during a game in San Diego.
Willie Mays
1964
The musical "Fiddler on the Roof" opened on Broadway, beginning a run of 3,242 performances.
Fiddler on the Roof
1960
Mali Federation becomes Mali. In August 1960, Senegal opted out of the Mali Federation allowing the federation to take on the name of Mali.
Mali Federation
1949
The Soviet Union exploded its first atomic bomb.
Soviet atomic bomb project
1927
Gene Tunney successfully defended his heavyweight boxing title against Jack Dempsey in the "long count" fight in Chicago.
1869
Richard Wagner's opera Das Rheingold or The Rhine Gold is heard for the first time. The first of 4 musical works of art that constitute Wagner's Der Ring des Nibelungen, Das Rheingold was played at the National Theatre in Munich. The other three music dramas are Die Walküre or The Valkyrie, Siegfried, and Götterdämmerung or Twilight of the Gods.
Der Ring des Nibelungen
1862
President Abraham Lincoln issued the preliminary Emancipation Proclamation, proposing to free all slaves of rebel states as of Jan. 1, 1863.
Emancipation Day
1792
French First Republic formed by the National Convention, stripping French king of his powers.
French First Republic
1789
Congress authorized the office of Postmaster-General.
United States Postmaster General
1776
Nathan Hale was hanged as a spy by the British during the Revolutionary War.
Nathan Hale
1761
Britain's King George III and his wife, Charlotte, were crowned in Westminster Abbey.
George III of the United Kingdom
1692
Last people hanged for witchcraft (8) in the US, 20 hanged overall during Salem witch trials.
Salem witch trials