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| Date | Title | Country | Details |
|---|---|---|---|
| Jan(day unknown) | 1965–66 Four Hills TournamentSource：Wikidata | Unknown | |
| Jan(day unknown) | Deaths in January 1966Source：Wikidata | Unknown | |
| Jan(day unknown) | figure skating at the 1966 Winter UniversiadeDetailsPlace: Sestriere | Italy | Place: Sestriere |
| 1/1 | Vienna New Year's Concert 1966Source：Wikidata | Unknown | |
| 1/3 | 1966 Upper Voltan coup d'étatDetailsPlace: Ouagadougou | Republic of Upper Volta | Place: Ouagadougou |
| 1/4 | Feyzin disasterSource：Wikidata | France | |
| 1/7 | 1966 Dominican general electionSource：Wikidata | Dominica | |
| 1/8 | 1966 New Zealand Grand PrixSource：Wikidata | New Zealand | |
| 1/10 | Tashkent DeclarationDetailsPlace: Tashkent | Uzbekistan | Place: Tashkent |
| 1/10 | Cousin murdersSource：Wikidata | South Africa | |
| 1/11 | 1966 NBA All-Star GameDetailsPlace: Cincinnati Gardens | United States | Place: Cincinnati Gardens |
| 1/12 | Thirteenth government of IsraelSource：Wikidata | Israel | |
| 1/12 | 1966 State of the Union AddressSource：Wikidata | United States | |
| 1/14 | Avianca Flight 4DetailsPlace: Cartagena | Colombia | Place: Cartagena |
| 1/14 | Operation CrimpDetailsPlace: Củ Chi | Vietnam | Place: Củ Chi |
| 1/14 | TU-134 plane crashDetailsPlace: Sobinsky District | Unknown | Place: Sobinsky District |
| 1/15 | Festival RTP da Canção 1966Source：Wikidata | Portugal | |
| 1/16 | 1966 Nigerian coup d'etatDetailsPlace: Nigeria | Nigeria | Place: Nigeria |
| 1/17 | 1966 Palomares B-52 crashDetailsPlace: Mediterranean Sea | Spain | Place: Mediterranean Sea |
| 1/20 | Protocol 5 to the European Convention on Human RightsSource：Wikidata | Unknown | |
| 1/22 | Forest Town raidDetailsPlace: Forest Town | South Africa | Place: Forest Town |
| 1/24 | Air India Flight 101DetailsPlace: Western Alps | France | Place: Western Alps |
| 1/25 | 1966 Nauruan parliamentary electionSource：Wikidata | Nauru | |
| 1/25 | Goldene Kamera 1965DetailsPlace: Hotel Vier Jahreszeiten | Germany | Place: Hotel Vier Jahreszeiten |
| 1/25 | Chilean nationalization of copperSource：Wikidata | Chile | |
| 1/26 | Beaumont children disappearanceDetailsPlace: Glenelg | Australia | Place: Glenelg |
| 1/28 | Lufthansa Flight 005Source：Wikidata | Germany | |
| 1/29 | Luxembourg compromiseDetailsPlace: Luxembourg | Unknown | Place: Luxembourg |
| 1/31 | Luna 9DetailsLanding (UTC): February 3, 1966 | Soviet Union | Landing (UTC): February 3, 1966 |
| Feb(day unknown) | Deaths in February 1966Source：Wikidata | Unknown | |
| 2/2 | PIA Flight 17Source：Wikidata | Unknown | |
| 2/4 | All Nippon Airways Flight 60JapanOriginal title: 全日空羽田沖墜落事故DetailsPlace: Tokyo Bay | Japan | Place: Tokyo Bay |
| 2/5 | Norway in the Eurovision Song Contest 1966Source：Wikidata | Norway | |
| 2/5 | Melodi Grand Prix 1966DetailsPlace: Centralteatret | Norway | Place: Centralteatret |
| 2/6 | 1966 Liechtenstein general electionSource：Wikidata | Liechtenstein | |
| 2/6 | 1966 Costa Rican general electionSource：Wikidata | Costa Rica | |
| 2/7 | Operation Shed LightDetailsPlace: South Vietnam | Unknown | Place: South Vietnam |
| 2/12 | Tay Vinh MassacreDetailsPlace: Tây Sơn | Vietnam | Place: Tây Sơn |
| 2/16 | Aeroflot Flight 302DetailsPlace: Soviet Union | Unknown | Place: Soviet Union |
| 2/17 | Aeroflot Flight 65DetailsPlace: Moscow | Russia | Place: Moscow |
| 2/17 | Geneva Agreement (1966)DetailsPlace: Geneva | United Kingdom, Venezuela | Place: Geneva |
| 2/17 | Operation Double EagleDetailsPlace: Quảng Ngãi | Unknown | Place: Quảng Ngãi |
| 2/18 | 1966 alleged Ceylonese coup d'état attemptSource：Wikidata | Sri Lanka | |
| 2/22 | 1966 Australian Grand PrixSource：Wikidata | Australia | |
| 2/23 | 1966 Syrian coup d'étatDetailsPlace: Syria | Syria | Place: Syria |
| 2/24 | 1966 Ghanaian coup d'étatSource：Wikidata | Ghana | |
| 2/26 | AS-201Source：Wikidata | Unknown | |
| 2/26 | Go Dai MassacreDetailsPlace: Bình An | Vietnam | Place: Bình An |
| 2/27 | 1966 Bulgarian parliamentary electionSource：Wikidata | Bulgaria | |
| 2/28 | 23rd Golden Globe AwardsDetailsPlace: Los Angeles | United States | Place: Los Angeles |
| 2/28 | 1966 NASA T-38 crashSource：Wikidata | United States | |
| 2/28 | March 1966 Mizo National Front uprisingSource：Wikidata | India | |
| 2/28 | Poëzie in CarréSource：Wikidata | Unknown | |
| Mar(day unknown) | Deaths in March 1966Source：Wikidata | Unknown | |
| 3/4 | Canadian Pacific Air Lines Flight 402JapanOriginal title: カナダ太平洋航空402便着陸失敗事故DetailsPlace: Tokyo International Airport | Japan | Place: Tokyo International Airport |
| 3/5 | Eurovision Song Contest 1966DetailsPlace: Villa Louvigny | Luxembourg | Place: Villa Louvigny |
| 3/5 | BOAC Flight 911JapanOriginal title: 英国海外航空機空中分解事故DetailsPlace: Mount Fuji | Japan | Place: Mount Fuji |
| 3/5 | 1966 Omloop Het VolkSource：Wikidata | Belgium | |
| 3/6 | 1966 Austrian legislative electionSource：Wikidata | Austria | |
| 3/6 | 1966 Guatemalan general electionSource：Wikidata | Guatemala | |
| 3/7 | Operation UtahDetailsPlace: Quảng Ngãi | Unknown | Place: Quảng Ngãi |
| 3/8 | 1966 Xingtai earthquakeSource：Wikidata | People's Republic of China | |
| 3/10 | Wedding of Princess Beatrix of the Netherlands and Claus van AmsbergDetailsPlace: Royal Palace of Amsterdam | Netherlands | Place: Royal Palace of Amsterdam |
| 3/12 | 1966 Hualien earthquakeSource：Wikidata | Taiwan | |
| 3/13 | 1966 Salvadoran legislative electionSource：Wikidata | El Salvador | |
| 3/15 | 1966 Finnish parliamentary electionSource：Wikidata | Finland | |
| 3/16 | Gemini 8DetailsCrew: Neil Armstrong, David Scott · Operator: National Aeronautics and Space Administration · Landing (UTC): March 17, 1966 | United States | Crew: Neil Armstrong, David Scott · Operator: National Aeronautics and Space Administration · Landing (UTC): March 17, 1966 |
| 3/17 | 1966 European Indoor Games – men's 60 metresSource：Wikidata | Unknown | |
| 3/18 | United Arab Airlines Flight 749Source：Wikidata | Egypt | |
| 3/19 | 1966 NCAA University Division basketball championship gameDetailsPlace: College Park | United States | Place: College Park |
| 3/20 | Theft of the Jules Rimet TrophyDetailsPlace: Methodist Central Hall | United Kingdom | Place: Methodist Central Hall |
| 3/20 | 1966 Toro earthquakeSource：Wikidata | Unknown | |
| 3/20 | 1966 Colombian parliamentary electionSource：Wikidata | Colombia | |
| 3/21 | 1966 Taiwan presidential electionDetailsPlace: Chung-Shan Building | Taiwan | Place: Chung-Shan Building |
| 3/23 | 1966 Gent–WevelgemSource：Wikidata | Belgium | |
| 3/23 | 18th Writers Guild of America AwardsSource：Wikidata | United States | |
| 3/23 | Operation OregonDetailsPlace: Huế | Unknown | Place: Huế |
| 3/25 | Operation TexasDetailsPlace: Quảng Ngãi | Unknown | Place: Quảng Ngãi |
| 3/25 | Operation HarrisonDetailsPlace: Phu Yen | Unknown | Place: Phu Yen |
| 3/26 | 1966 Maltese general electionSource：Wikidata | State of Malta | |
| 3/26 | 1966 12 Hours of SebringDetailsPlace: Sebring International Raceway | United States | Place: Sebring International Raceway |
| 3/26 | 1966 Harelbeke-Antwerpen-HarelbekeSource：Wikidata | Belgium | |
| 3/26 | 2nd Golden Bell AwardsDetailsPlace: Zhongshan Hall | Taiwan | Place: Zhongshan Hall |
| 3/27 | 1966 Hamburg state electionSource：Wikidata | Germany | |
| 3/27 | 1966 European Indoor Games – men's 400 metresSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – men's 800 metresSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – men's 60 metres hurdlesSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – women's 60 metresSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – women's 60 metres hurdlesSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – women's 400 metresSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – women's 800 metresSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – women's 4 × 160 metres relaySource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – men's shot putSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – men's long jumpSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – men's triple jumpSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – women's long jumpSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – women's shot putSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – men's high jumpSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – men's pole vaultSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – women's high jumpSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – men's 1500 metresSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – men's 3000 metresSource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – men's medley relaySource：Wikidata | Unknown | |
| 3/27 | 1966 European Indoor Games – men's 4 × 320 metres relaySource：Wikidata | Unknown | |
| 3/28 | Turkish presidential election, 1966Source：Wikidata | Turkey | |
| 3/30 | 1966 South African general electionSource：Wikidata | South Africa | |
| 3/31 | Luna 10DetailsOperator: Soviet Union | Soviet Union | Operator: Soviet Union |
| 3/31 | 1966 United Kingdom general electionSource：Wikidata | United Kingdom | |
| Apr(day unknown) | 1966 Hong Kong riotsSource：Wikidata | British Hong Kong | |
| Apr(day unknown) | Deaths in April 1966Source：Wikidata | Unknown | |
| Apr(day unknown) | Operation GriffinSource：Wikidata | Unknown | |
| 4/3 | 1966 Dwars door VlaanderenSource：Wikidata | Belgium | |
| 4/6 | International Convention on Load LinesDetailsPlace: London | United Kingdom | Place: London |
| 4/6 | Westall UFOSource：Wikidata | Australia | |
| 4/6 | Operation JackstaySource：Wikidata | Unknown | |
| 4/7 | 1966 Columbia 200DetailsPlace: Columbia Speedway | United States | Place: Columbia Speedway |
| 4/7 | 1966 Brabantse PijlSource：Wikidata | Belgium | |
| 4/10 | 1966 Arab Nations Cup FinalDetailsPlace: Baghdad | Iraq | Place: Baghdad |
| 4/12 | 1966 Grand Prix de DenainSource：Wikidata | France | |
| 4/12 | 1966 Paris–CamembertSource：Wikidata | France | |
| 4/18 | 38th Academy AwardsDetailsPlace: California | United States | Place: California |
| 4/19 | 1966 Boston MarathonDetailsPlace: Boston | United States | Place: Boston |
| 4/22 | American Flyers Airline Flight 280Source：Wikidata | United States | |
| 4/23 | Aeroflot Flight 2723DetailsPlace: Caspian Sea | Unknown | Place: Caspian Sea |
| 4/26 | Tashkent earthquake (1966)DetailsPlace: Tashkent | Soviet Union, Uzbek Soviet Socialist Republic | Place: Tashkent |
| 4/27 | LANSA Flight 501Source：Wikidata | Peru | |
| 4/28 | Battle of SinoiaDetailsPlace: Chinhoyi | Zimbabwe | Place: Chinhoyi |
| 4/29 | 1966 La Flèche WallonneSource：Wikidata | Belgium | |
| May(day unknown) | Deaths in May 1966Source：Wikidata | Unknown | |
| 5/1 | Battle of Mount HandrinDetailsPlace: Rawanduz | Unknown | Place: Rawanduz |
| 5/1 | 1966 Syracuse Grand PrixSource：Wikidata | Italy | |
| 5/1 | 1966 Colombian presidential electionSource：Wikidata | Colombia | |
| 5/4 | May 1966 lunar eclipseSource：Wikidata | Unknown | |
| 5/6 | Bergrutsch HintersteinDetailsPlace: Hinterstein | Germany | Place: Hinterstein |
| 5/8 | 1966 Targa FlorioSource：Wikidata | Italy | |
| 5/9 | Nuclear test CHIC-3DetailsPlace: Lop Nur | Unknown | Place: Lop Nur |
| 5/10 | Operation GeorgiaDetailsPlace: Quảng Nam | Unknown | Place: Quảng Nam |
| 5/11 | 1966 NBA DraftSource：Wikidata | United States | |
| 5/11 | Kidnapping of Peggy Ann BradnickDetailsPlace: Shade Gap | United States | Place: Shade Gap |
| 5/14 | 1966 BRDC International TrophySource：Wikidata | United States | |
| 5/19 | 1966 Coppa Italia FinalDetailsPlace: Stadio Olimpico | Italy | Place: Stadio Olimpico |
| 5/20 | solar eclipse of May 20, 1966Source：Wikidata | Turkey | |
| 5/20 | The Lovin' Spoonful's drug bustDetailsPlace: Pacific Heights | Unknown | Place: Pacific Heights |
| 5/22 | 1966 Taça de Portugal FinalDetailsPlace: Estádio Nacional | Portugal | Place: Estádio Nacional |
| 5/22 | 1966 Coupe de France FinalDetailsPlace: Parc des Princes | France | Place: Parc des Princes |
| 5/26 | 1966 Gambian parliamentary electionSource：Wikidata | The Gambia | |
| 5/30 | Surveyor 1DetailsOperator: National Aeronautics and Space Administration · Landing (UTC): June 2, 1966 | United States | Operator: National Aeronautics and Space Administration · Landing (UTC): June 2, 1966 |
| Jun(day unknown) | Deaths in June 1966Source：Wikidata | Unknown | |
| Jun(day unknown) | Division Street RiotsDetailsPlace: Chicago | United States | Place: Chicago |
| 6/1 | Irish presidential election, 1966Source：Wikidata | Ireland | |
| 6/1 | 1966 Dominican Republic general electionSource：Wikidata | Dominican Republic | |
| 6/3 | Gemini 9ADetailsCrew: Eugene Cernan, Thomas P. Stafford · Operator: National Aeronautics and Space Administration · Landing (UTC): June 6, 1966 | United States | Crew: Eugene Cernan, Thomas P. Stafford · Operator: National Aeronautics and Space Administration · Landing (UTC): June 6, 1966 |
| 6/3 | 1966 Felthorpe Trident crashSource：Wikidata | United Kingdom | |
| 6/4 | 1966 DFB-Pokal FinalDetailsPlace: Waldstadion | Germany | Place: Waldstadion |
| 6/5 | 1966 Quebec general electionSource：Wikidata | Canada | |
| 6/7 | 1966 Gullegem KoerseSource：Wikidata | Belgium | |
| 6/8 | Buddhist UprisingDetailsPlace: Da Nang | Vietnam | Place: Da Nang |
| 6/8 | Operation HardihoodDetailsPlace: Phước Tuy | Unknown | Place: Phước Tuy |
| 6/9 | 1966 Iraqi Central Perseverance CupDetailsPlace: Baghdad | Iraq | Place: Baghdad |
| 6/12 | 1966 Soviet Union legislative electionSource：Wikidata | Soviet Union | |
| 6/12 | 1966 Hong Kong floodsDetailsPlace: British Hong Kong | Unknown | Place: British Hong Kong |
| 6/12 | 1966 Kenyan parliamentary by-electionsSource：Wikidata | Kenya | |
| 6/13 | 1966 Trophée des ChampionsDetailsPlace: Stade Marcel Saupin | France | Place: Stade Marcel Saupin |
| 6/14 | Telegraph RiotsSource：Wikidata | Netherlands | |
| 6/21 | Operation HawthorneSource：Wikidata | Unknown | |
| 6/25 | Intervision Song Contest 1966DetailsPlace: Bratislava | Czechoslovakia | Place: Bratislava |
| 6/26 | 1966 Mongolian legislative electionSource：Wikidata | Mongolia | |
| 6/30 | Hakamata IncidentJapanOriginal title: 袴田事件DetailsPlace: Tōkaidō Main Line | Japan | Place: Tōkaidō Main Line |
| Jul(day unknown) | 1966 Republic of the Congo coup d'état attemptDetailsPlace: Republic of the Congo | Republic of the Congo | Place: Republic of the Congo |
| 7/2 | Operation JayDetailsPlace: Huế | Unknown | Place: Huế |
| 7/2 | Miss Slovenia 1966DetailsPlace: Portorož | Socialist Federal Republic of Yugoslavia | Place: Portorož |
| 7/3 | 1966 Bolivian general electionSource：Wikidata | Bolivia | |
| 7/4 | 1966 Air New Zealand crashSource：Wikidata | New Zealand | |
| 7/5 | AS-203DetailsOperator: National Aeronautics and Space Administration | United States | Operator: National Aeronautics and Space Administration |
| 7/8 | July 1966 Burundian coup d'étatSource：Wikidata | Burundi | |
| 7/10 | 1966 North Rhine-Westphalia state electionSource：Wikidata | Germany | |
| 7/10 | 1966 Albanian parliamentary electionSource：Wikidata | Albania | |
| 7/14 | 1966 Carmarthen by-electionSource：Wikidata | United Kingdom | |
| 7/16 | Miss Universe 1966DetailsPlace: Miami Beach Convention Center | Unknown | Place: Miami Beach Convention Center |
| 7/18 | Gemini 10DetailsCrew: Michael Collins, John Young · Operator: National Aeronautics and Space Administration · Landing (UTC): July 21, 1966 | United States | Crew: Michael Collins, John Young · Operator: National Aeronautics and Space Administration · Landing (UTC): July 21, 1966 |
| 7/18 | Hough RiotsDetailsPlace: Hough | United States | Place: Hough |
| 7/22 | Holden's Lightning flightDetailsPlace: RAF Lyneham | United Kingdom | Place: RAF Lyneham |
| 7/25 | Gedenkstein Busunglück von WerschauSource：Wikidata | Germany | |
| 7/25 | 1966 Saint Kitts-Nevis-Anguilla general electionSource：Wikidata | United Kingdom | |
| 7/25 | Attack on Guararapes AirportDetailsPlace: Recife/Guararapes–Gilberto Freyre International Airport | Brazil | Place: Recife/Guararapes–Gilberto Freyre International Airport |
| 7/28 | Nigerian Counter-Coup of 1966Source：Wikidata | Nigeria | |
| 7/28 | 1966 Smoky Mountain 200DetailsPlace: Smoky Mountain Speedway | United States | Place: Smoky Mountain Speedway |
| 7/29 | La Noche de los Bastones LargosDetailsPlace: University of Buenos Aires | Argentina | Place: University of Buenos Aires |
| 7/30 | 1966 Nashville 400DetailsPlace: Fairgrounds Speedway | United States | Place: Fairgrounds Speedway |
| 7/31 | University of Texas Tower ShootingDetailsPlace: University of Texas at Austin | United States | Place: University of Texas at Austin |
| Aug(day unknown) | Compton's Cafeteria riotDetailsPlace: Tenderloin | United States | Place: Tenderloin |
| Aug(day unknown) | Deaths in August 1966Source：Wikidata | Unknown | |
| 8/1 | University of Texas Tower ShootingDetailsPlace: University of Texas at Austin | United States | Place: University of Texas at Austin |
| 8/1 | Operation Paul RevereSource：Wikidata | Unknown | |
| 8/6 | Braniff Flight 250DetailsPlace: Falls City | United States | Place: Falls City |
| 8/6 | 11th David di Donatello AwardsDetailsPlace: Ancient theatre of Taormina | Italy | Place: Ancient theatre of Taormina |
| 8/6 | 1966 Dhabyani coup d'étatDetailsPlace: Emirate of Abu Dhabi | Trucial States | Place: Emirate of Abu Dhabi |
| 8/7 | 1966 Mauritanian presidential electionSource：Wikidata | Mauritania | |
| 8/9 | Battle of Đức CơDetailsPlace: Đức Cơ | Vietnam | Place: Đức Cơ |
| 8/10 | Lunar Orbiter 1Source：Wikidata | Unknown | |
| 8/12 | Shepherd's Bush murdersDetailsPlace: East Acton | United Kingdom | Place: East Acton |
| 8/18 | Battle of Long TanDetailsPlace: Long Tân | Vietnam | Place: Long Tân |
| 8/19 | 1966 Varto earthquakeSource：Wikidata | Turkey | |
| 8/22 | transit of Venus from MarsSource：Wikidata | Unknown | |
| 8/22 | 1966 Vincentian general electionSource：Wikidata | Saint Vincent and the Grenadines | |
| 8/22 | Operation ColoradoDetailsPlace: Hiệp Đức | Unknown | Place: Hiệp Đức |
| 8/24 | Luna 11Source：Wikidata | Unknown | |
| 8/25 | AS-202DetailsOperator: National Aeronautics and Space Administration · Landing (UTC): August 25, 1966 | United States | Operator: National Aeronautics and Space Administration · Landing (UTC): August 25, 1966 |
| 8/26 | South African Border WarDetailsPlace: Namibia | Namibia | Place: Namibia |
| 8/26 | 1966 Japan Airlines Convair 880 crashDetailsPlace: Haneda Airport | Unknown | Place: Haneda Airport |
| 8/26 | Battle of OngulumbasheSource：Wikidata | Unknown | |
| 8/27 | 1966 Myers Brothers 250DetailsPlace: Bowman Gray Stadium | United States | Place: Bowman Gray Stadium |
| Sep(day unknown) | Destruction in Art SymposiumDetailsPlace: London | United Kingdom | Place: London |
| Sep(day unknown) | Pyeongsinjeong incidentJapanOriginal title: 平新艇事件Source：Wikidata | Japan | |
| Sep(day unknown) | Deaths in September 1966Source：Wikidata | Unknown | |
| 9/1 | Britannia Airways Flight 105DetailsPlace: Lahovče | Slovenia | Place: Lahovče |
| 9/4 | Miss Italy 1966Source：Wikidata | Italy | |
| 9/6 | 1966 Grote Prijs Jef ScherensSource：Wikidata | Belgium | |
| 9/8 | Star Trek DaySource：Wikidata | Unknown | |
| 9/8 | 1966 Newfoundland general electionSource：Wikidata | Canada | |
| 9/9 | Malga Sasso barracks bombingSource：Wikidata | Italy | |
| 9/9 | 1966 Buddy Shuman 250DetailsPlace: Hickory Motor Speedway | United States | Place: Hickory Motor Speedway |
| 9/11 | 1966 Cambodian general electionSource：Wikidata | Cambodia | |
| 9/11 | 1966 South Vietnamese Constitutional Assembly electionSource：Wikidata | South Vietnam | |
| 9/12 | Gemini 11DetailsCrew: Pete Conrad, Richard F. Gordon · Operator: National Aeronautics and Space Administration · Landing (UTC): September 15, 1966 | United States | Crew: Pete Conrad, Richard F. Gordon · Operator: National Aeronautics and Space Administration · Landing (UTC): September 15, 1966 |
| 9/17 | 1966 International Gold CupSource：Wikidata | Unknown | |
| 9/18 | Operation PagodaDetailsPlace: Chegutu | Unknown | Place: Chegutu |
| 9/20 | Surveyor 2DetailsOperator: National Aeronautics and Space Administration | United States | Operator: National Aeronautics and Space Administration |
| 9/22 | 国会汚物投擲事件Source：Wikidata | South Korea | |
| 9/22 | Ansett-ANA Flight 149Source：Wikidata | Australia | |
| 9/25 | III Gran Trofeu Jorba-PreciadosDetailsPlace: Portal de l'Àngel | Unknown | Place: Portal de l'Àngel |
| 9/29 | Operation CondorDetailsPlace: Falkland Islands | Argentina | Place: Falkland Islands |
| 9/30 | Urtabulak gas fieldDetailsPlace: Uzbekistan | Soviet Union | Place: Uzbekistan |
| Oct(day unknown) | 1966 anti-Igbo pogromDetailsPlace: Northern Region | Nigeria | Place: Northern Region |
| Oct(day unknown) | Deaths in October 1966Source：Wikidata | Unknown | |
| Oct(day unknown) | Night of SchmelzerSource：Wikidata | Netherlands | |
| 10/1 | West Coast Airlines Flight 956DetailsPlace: Clackamas County | United States | Place: Clackamas County |
| 10/3 | 1966 Brazilian presidential electionSource：Wikidata | Brazil | |
| 10/7 | Dorion level crossing accidentSource：Wikidata | Canada | |
| 10/9 | 1966 Paris-ToursSource：Wikidata | France | |
| 10/9 | Binh Tai MassacreSource：Wikidata | Unknown | |
| 10/16 | 1966 Ecuadorian Constitutional Assembly electionSource：Wikidata | Ecuador | |
| 10/17 | 3rd Guldbagge AwardsSource：Wikidata | Sweden | |
| 10/17 | 1966 Peru earthquakeSource：Wikidata | Peru | |
| 10/21 | Aberfan disasterDetailsPlace: Aberfan | United Kingdom | Place: Aberfan |
| 10/21 | 1966 Laotian coupDetailsPlace: Laos | Laos | Place: Laos |
| 10/22 | Luna 12Source：Wikidata | Unknown | |
| 10/23 | 1966 Montreal municipal electionSource：Wikidata | Canada | |
| 10/25 | Operation Sea DragonDetailsPlace: South Vietnam | Unknown | Place: South Vietnam |
| 10/26 | USS Oriskany fireDetailsPlace: Gulf of Tonkin | North Vietnam | Place: Gulf of Tonkin |
| 10/28 | Operation MaconSource：Wikidata | Unknown | |
| 10/29 | 1966 Scottish League Cup FinalDetailsPlace: Hampden Park | Unknown | Place: Hampden Park |
| 10/29 | October 1966 lunar eclipseSource：Wikidata | Unknown | |
| 10/30 | 4th Golden Horse Film AwardsDetailsPlace: Zhongshan Hall | Taiwan | Place: Zhongshan Hall |
| 10/30 | murder of Cheri Jo BatesSource：Wikidata | United States | |
| 10/30 | 1966 American 500DetailsPlace: Rockingham Speedway | United States | Place: Rockingham Speedway |
| Nov(day unknown) | Loop FireDetailsPlace: Angeles National Forest | United States | Place: Angeles National Forest |
| Nov(day unknown) | Deaths in November 1966Source：Wikidata | Unknown | |
| 11/2 | Halfweg rail accident on 2 November 1966Source：Wikidata | Netherlands | |
| 11/3 | Ñancahuazú GuerrillaDetailsPlace: Bolivia | Bolivia | Place: Bolivia |
| 11/3 | 1966 Barbadian general electionSource：Wikidata | United Kingdom | |
| 11/4 | 1966 flood of the ArnoSource：Wikidata | Italy | |
| 11/4 | 1966 Flood in VeniceSource：Wikidata | Italy | |
| 11/6 | Lunar Orbiter 2Source：Wikidata | Unknown | |
| 11/6 | 1966 Hessian state electionSource：Wikidata | Germany | |
| 11/7 | 1966 Trinidad and Tobago general electionSource：Wikidata | Trinidad and Tobago | |
| 11/8 | 1966 Faroese general electionSource：Wikidata | Denmark, Faroe Islands | |
| 11/8 | 1966 United States Senate electionsSource：Wikidata | United States | |
| 11/8 | 1966 California gubernatorial electionSource：Wikidata | United States | |
| 11/8 | 1966 United States House of Representatives electionsSource：Wikidata | United States | |
| 11/8 | 1966 United States electionsSource：Wikidata | United States | |
| 11/8 | 1966 Alaska gubernatorial electionSource：Wikidata | United States | |
| 11/8 | American Samoan constitutional referendum, 1966Source：Wikidata | United States | |
| 11/8 | 1966 Florida gubernatorial electionSource：Wikidata | United States | |
| 11/8 | 1966 Georgia gubernatorial electionSource：Wikidata | United States | |
| 11/8 | 1966 Hawaii gubernatorial electionSource：Wikidata | United States | |
| 11/8 | 1966 Massachusetts gubernatorial electionSource：Wikidata | United States | |
| 11/8 | 1966 Oregon gubernatorial electionSource：Wikidata | United States | |
| 11/8 | 1966 United States Senate election in MassachusettsSource：Wikidata | United States | |
| 11/8 | 1966 Trust Territory of the Pacific Islands parliamentary electionSource：Wikidata | Trust Territory of the Pacific Islands | |
| 11/8 | 1966 United States Senate election in DelawareSource：Wikidata | United States | |
| 11/10 | Anting incidentDetailsPlace: Anting Railway Station | People's Republic of China | Place: Anting Railway Station |
| 11/11 | Gemini 12DetailsCrew: Buzz Aldrin, Jim Lovell · Operator: National Aeronautics and Space Administration · Landing (UTC): November 15, 1966 | United States | Crew: Buzz Aldrin, Jim Lovell · Operator: National Aeronautics and Space Administration · Landing (UTC): November 15, 1966 |
| 11/11 | 1966 United Nations Security Council electionSource：Wikidata | United Nations | |
| 11/12 | solar eclipse of November 12, 1966Source：Wikidata | Unknown | |
| 11/13 | Samu IncidentDetailsPlace: as-Samu | Unknown | Place: as-Samu |
| 11/13 | All Nippon Airways Flight 533JapanOriginal title: 全日空松山沖墜落事故Source：Wikidata | Japan | |
| 11/14 | Muhammad Ali vs. Cleveland WilliamsDetailsPlace: Astrodome | United States | Place: Astrodome |
| 11/15 | Pan Am Flight 708DetailsPlace: Dallgow-Döberitz | Germany | Place: Dallgow-Döberitz |
| 11/15 | 1966 Brazilian legislative electionSource：Wikidata | Brazil | |
| 11/17 | Miss World 1966DetailsPlace: Lyceum Theatre | Unknown | Place: Lyceum Theatre |
| 11/18 | Incident on Hill 192Source：Wikidata | South Vietnam | |
| 11/20 | 1966 Bavarian state electionSource：Wikidata | Germany | |
| 11/22 | 1966 Danish general electionSource：Wikidata | Denmark | |
| 11/22 | Il-18 AccidentDetailsPlace: Kazakh Soviet Socialist Republic | Unknown | Place: Kazakh Soviet Socialist Republic |
| 11/24 | TABSO Flight 101Source：Wikidata | Unknown | |
| 11/26 | 1966 Australian federal electionSource：Wikidata | Australia | |
| 11/27 | 1966 Uruguayan general electionSource：Wikidata | Uruguay | |
| 11/27 | Uruguayan constitutional referendum, 1966Source：Wikidata | Uruguay | |
| 11/28 | Kosmos 133DetailsLanding (UTC): November 30, 1966 | Unknown | Landing (UTC): November 30, 1966 |
| 11/29 | November 1966 Burundian coup d'étatSource：Wikidata | Burundi | |
| Dec(day unknown) | Binh Hoa massacreDetailsPlace: Bình Hòa | Vietnam | Place: Bình Hòa |
| Dec(day unknown) | 1966–67 Four Hills TournamentSource：Wikidata | Unknown | |
| Dec(day unknown) | Deaths in December 1966Source：Wikidata | Unknown | |
| 12/3 | 12-3 incidentDetailsPlace: Portuguese Macau | Portugal | Place: Portuguese Macau |
| 12/14 | Spanish organic law referendum, 1966Source：Wikidata | Spain | |
| 12/14 | Spanish organic law referendum, 1966Source：Wikidata | Spain | |
| 12/16 | International Covenant on Civil and Political RightsDetailsPlace: New York City | United States | Place: New York City |
| 12/18 | Villafranca train crashDetailsPlace: Villafranca del Campo | Spain | Place: Villafranca del Campo |
| 12/19 | Copa SiemensDetailsPlace: El Cilindro | Argentina | Place: El Cilindro |
| 12/21 | Luna 13DetailsOperator: Soviet Union · Landing (UTC): December 24, 1966 | Soviet Union | Operator: Soviet Union · Landing (UTC): December 24, 1966 |
| 12/24 | 1966 Flying Tiger Line Canadair CL-44 crashDetailsPlace: Da Nang | Unknown | Place: Da Nang |
| 12/27 | black mist dissolutionJapanOriginal title: 黒い霧解散Source：Wikidata | Japan | |
| 12/28 | 1966 Chile earthquakeSource：Wikidata | Chile |