September 1st
- 1802: James Callender Reveals Thomas Jefferson And Sally Hemings' Relationship
- 1807: Aaron Burr Is Acquitted Of Treason
- 1939: Germany Invades Poland, Triggering The Outbreak Of World War II In Europe
- 1969: The Berkshire UFO Incident Occurs
- 1972: Bobby Fischer Wins The World Chess Championship
- 1985: The Wreckage Of The Titanic Is Discovered
- 2004: The Beslan School Massacre Begins
- 2009: Picher, Oklahoma Is Unincorporated And Evacuated
September 2nd
- 31 B.C.E.: Octavian Defeats Mark Antony
- 1666: The Great Fire Of London Breaks Out
- 1838: Queen Liliuokalani Is Born
- 1944: The Chichijima Incident Takes Place
- 1968: Divers Discover Bimini Road
- 1969: Ho Chi Minh Dies
September 3rd
- 1189: Richard The Lionheart Is Crowned King
- 1770: Captain James Cook Becomes First European To Make Contact With Remote Asmat Tribe
- 1783: The Treaty Of Paris Is Signed
- 1838: Frederick Douglass Escapes Slavery
- 2012: Griselda Blanco, "Queen of Cocaine," dies
- 2013: Ariel Castro Commits Suicide
September 4th
- 476 C.E.: The Western Roman Empire Falls
- 925: Athelstan Is Crowned King Of England
- 1886: Apache Leader Geronimo Surrenders
- 1957: The Little Rock Nine Enter An Integrated School
- 1957: Dorothy Counts Integrates Harry Harding High School
- 1998: Google Is Founded
- 2005: Lloyd Avery II Is Murdered By His Cellmate
- 2006: Steve Irwin Dies
- 2016: Mother Teresa Is Canonized
September 5th
- 1638: King Louis XIV Is Born
- 1869: Construction Of Neuschwanstein Castle Begins
- 1877: Crazy Horse Dies
- 1946: Freddie Mercury Is Born
- 1975: Lynette Fromme Attempts To Assassinate President Gerald Ford
- 1986: Terrorists Hijack Pam Am Flight 73
September 6th
- 1522: Ferdinand Magellan's Ship Becomes The First To Circumnavigates The Globe
- 1901: President William McKinley Is Shot
- 1949: Howard Unruh Commits America's First Mass Shooting
- 1951: William S. Burroughs Kills Joan Vollmer
- 1992: Chris McCandless's Body Is Discovered
September 7th
- 1191: Richard The Lionheart Breaks Through The Muslim Army On The Way To Jerusalem
- 1533: Queen Elizabeth I Is Born
- 1695: Henry Every Raids The Mughal Ship Ganj-i-Sawai
- 1936: Buddy Holly Is Born
- 1939: The Battle Of Wizna Begins
- 1940: The Blitz Begins Over Great Britain
- 1949: Carlos Lehder Is Born
- 1996: Tupac Shakur Is Shot
September 8th
- 1429: Joan Of Arc Attacks Paris
- 1664: New Amsterdam Becomes New York
- 1888: Jack The Ripper Kills His Second Victim
- 1900: A Hurricane Levels Galveston, Texas
- 1965: The Delano Grape Strike Begins
September 9th
- 1087: William The Conqueror Dies
- 1890: Colonel Sanders Is Born
- 1921: Virginia Rappe Dies After Attending A Hollywood Party
- 1930: American Gangster Frank Lucas Is Born
- 1971: The Attica Prison Riot Begins
- 1976: Mao Zedong Dies
September 10th
- 1608: John Smith Is Elected To Lead Jamestown
- 1801: Marie Laveau Is Born
- 1897: The World's First Drunk Driving Arrest Takes Place
- 1977: The Last Person Is Executed By Guillotine In France
- 2008: The Large Hadron Collider Is Turned On
September 11th
- 1792: The Hope Diamond Is Stolen
- 1857: The Mountain Meadows Massacre Ends
- 1921: Fatty Arbuckle Is Arrested
- 1973: Pinochet Leads A Successful Coup In Chile
- 2001: The 9/11 Attacks Take Place
September 12th
- 1638: The Battle Of Vienna Ends Ottoman Domination In Eastern Europe
- 1846: HMS Terror Gets Trapped In Ice
- 1857: The SS Central America Sinks
- 1913: Jesse Owens Is Born
- 1940: The Lascaux Cave Paintings Are Discovered
- 1953: John F. Kennedy Weds Jacqueline Lee Bouvier
- 1959: Soviet Union Launches Luna 2, The First Space Probe To Reach The Moon
- 2003: Johnny Cash Dies
September 13th
- 1501: Michelangelo Begins His 'David' Statue
- 1848: Phineas Gage Is Impaled By A Metal Pole
- 1857: Milton Hershey Is Born
- 1904: Alberta King Is Born
- 1918: Rosemary Kennedy Is Born
- 1978: Rodney Alcala Appears On 'The Dating Game'
- 1985: Super Mario Bros. Is Released
- 1990: Gina Grant Is Arrested For The Murder Of Her Mother
September 14th
- 1321: Dante Alighieri Dies
- 1814: Francis Scott Key Writes The Star-Spangled Banner
- 1836: Aaron Burr Dies
- 1975: Elizabeth Ann Seton Is Canonized
- 1977: Manacled Mormon Case Begins
- 1982: Grace Kelly Dies
- 1989: Gemini Twins Anthony Senter And Joey Testa Are Sentenced To Life In Prison
September 15th
- 1254: Marco Polo Is Born
- 1835: Charles Darwin Arrives In The Galapagos Islands
- 1890: Agatha Christie Is Born
- 1911: Lea Papin, The Youngest Papin Sister, Is Born
- 1935: The Nuremberg Race Laws Pass In Nazi Germany
- 1963: The Birmingham Church Bombing
September 16th
- 1620: The Mayflower Departs England
- 1810: The Mexican War Of Independence Begins
- 1920: The Wall Street Bombing
- 1932: Peg Entwistle Dies By Suicide
- 1970: King Of Jordan Declares Martial Law
- 1994: The Ariel School Phenomenon Occurs
September 17th
- 1787: The Constitution Is Signed
- 1849: Harriet Tubman Escapes From Slavery
- 1862: The Battle Of Antietam Begins
- 1926: Frida Kahlo Is Injured In A Bus Accident
- 1944: Operation Market Garden Begins
- 1976: NASA Unveils The First Space Shuttle
- 2011: Occupy Wall Street Begins
September 18th
- 1634: Anne Hutchinson Arrives In The New World
- 1709: Samuel Johnson Is Born
- 1959: "Lonely Hearts Killer" Harvey Glatman Is Executed
- 1970: Jimi Hendrix Dies
- 1975: Patty Hearst Is Arrested For Armed Robbery
September 19th
- 1692: Giles Corey Is Executed In The Salem Witch Trials
- 1881: President James Garfield Dies
- 1913: Frances Farmer Is Born
- 1949: Lesley Hornby, "Twiggy," Is Born
- 1961: Betty And Barney Hill Are Allegedly Abducted By Aliens
- 1972: Jeannette DePalma's Body Is Found
- 1991: Ötzi The Iceman Is Discovered
September 20th
- 1830: The First National Negro Convention Convenes In Philadelphia
- 1878: Upton Sinclair Is Born
- 1946: The First Cannes Film Festival
- 1988: Tara Calico Disappears
- 2011: "Don't Ask Don't Tell" Is Repealed
- 2019: Storm Area 51: They Can't Stop Us All
September 21st
- 19 B.C.E.: Virgil Dies
- 1780: Benedict Arnold Commits Treason
- 1823: Joseph Smith Claims To Receive A Visit From The Angel Moroni
- 1904: Nez Perce Chief Joseph Dies Of A "Broken Heart"
- 1938: The Great New England Hurricane Makes Landfall
- 1996: John F. Kennedy Jr. Weds Carolyn Bessette
September 22nd
- 1828: Shaka Zulu Is Assassinated
- 1906: Ilse Koch Is Born
- 1975: Sara Jane Moore Attempts To Assassinate President Gerald Ford
- 1980: Polish Solidarity Movement Begins
- 2006: Cassie Jo Stoddart Is Killed In The "Scream Murder"
September 23rd
- 1215: Kublai Khan Is Born
- 1641: The Merchant Royal Sinks Into The Atlantic
- 1843: Emily Roebling Is Born
- 1846: Planet Neptune Is Observed For The First Time
- 1919: Seth Bullock Dies
- 1920: Mickey Rooney Is Born
- 1954: First Victim Of The Hydrogen Bomb Dies
- 1988: Mel Ignatow Kills His Girlfriend Brenda Schaefer
September 24th
- 1789: The U.S. Supreme Court Is Established
- 1877: Saigō Takamori Dies
- 1896: F. Scott Fitzgerald Is Born
- 1957: President Eisenhower Uses Federal Troops To Enforce Integration In Arkansas
- 1991: Nirvana Releases Nevermind, One Of The Most Popular Grunge Albums Of All Time
September 25th
- 1513: Vasco Núñez De Balboa Spots The Pacific Ocean
- 1777: British Forces Occupy Philadelphia
- 1897: William Faulkner Is Born
- 1960: Emily Post Dies
- 1963: Joe Valachi Becomes The First Mobster To Publicly Acknowledge The Mafia's Existence
- 1980: John Bonham Dies
September 26th
- 1580: Sir Francis Drake Completes His Trip Around The World
- 1774: Johnny Appleseed Is Born
- 1898: George Gershwin Is Born
- 1969: The Brady Bunch Premieres On Television
- 1983: Stanislav Petrov Prevents The Outbreak Of Nuclear War
- 2012: Actor Johnny Lewis Falls To His Death After Killing His Landlady
September 27th
- 1590: Urban VII Dies 12 Days After Becoming Pope
- 1722: Samuel Adams Is Born
- 1869: Wild Bill Hickok Kills Samuel Strawhun
- 1888: 'Dear Boss' Letter Received
- 1960: Sylvia Pankhurst Dies
- 1962: Silent Spring Is Published By Rachel Carson
- 1969: The Zodiac Killer Murders Calvin Hartnell And Cecelia Ann Shepard
September 28th
- 48 B.C.E.: Pompey The Great Is Assassinated
- 1066: William The Conqueror's Norman Conquest Begins
- 1542: Spanish Explorer Cabrillo Becomes First European To Set Foot In The U.S. East Coast
- 1920: White Sox Players Are Indicted For The "Black Sox Scandal"
- 1934: Brigitte Bardot Is Born
- 2000: David Camm's Family Is Murdered
September 29th
- 1571: Caravaggio Is Born
- 1829: Scotland Yard Is Established
- 1982: The Chicago Tylenol Murders Begin
- 1988: NASA Launches Its First Mission Since The Challenger Disaster
- 1990: Police Find The Body Of Regina Walters, Victim Of Serial Killer Robert Rhoades
September 30th
- 1630: John Billington Is Hanged
- 1888: Jack The Ripper Murders His Third And Fourth Victims
- 1928: Elie Wiesel Is Born
- 1955: James Dean Dies
- 1974: Stephen King Checks In At The Stanley Hotel
- 1999: The Tokaimura Nuclear Incident
