| 66991 | June 12 | Event | 1967 – Venera program: Venera 4 is launched (it will become the first space probe to enter another planet's atmosphere and successfully return data). |
| 66992 | June 12 | Event | 1972 – The fast food restaurant chain Popeyes is founded in Arabi, Louisiana. |
| 66993 | June 12 | Event | 1978 – David Berkowitz, the "Son of Sam" killer in New York City, is sentenced to 365 years in prison for six killings. |
| 66994 | June 12 | Event | 1979 – Bryan Allen wins the second Kremer prize for a man powered flight across the English Channel in the Gossamer Albatross. |
| 66995 | June 12 | Event | 1987 – The Central African Republic's former Emperor Jean-Bédel Bokassa is sentenced to death for crimes he had committed during his 13-year rule. |
| 66996 | June 12 | Event | 1987 – Cold War: At the Brandenburg Gate U.S. President Ronald Reagan publicly challenges Mikhail Gorbachev to tear down the Berlin Wall. |
| 66997 | June 12 | Event | 1990 – Russia Day: The parliament of the Russian Federation formally declares its sovereignty. |
| 66998 | June 12 | Event | 1991 – Russians elect Boris Yeltsin as the president of the republic. |
| 66999 | June 12 | Event | 1991 – 1991 Kokkadichcholai massacre: The Sri Lankan Army massacres 152 minority Tamil civilians in the village Kokkadichcholai near the eastern province town of Batticaloa, Sri Lanka. |
| 67000 | June 12 | Event | 1993 – An election takes place in Nigeria which and is later annulled by the military Government led by Ibrahim Babangida. |
| 67001 | June 12 | Event | 1994 – Nicole Brown Simpson and Ronald Goldman are murdered outside her home in Los Angeles, California. O.J. Simpson is later acquitted of the killings, but is held liable in wrongful death civil suit. |
| 67002 | June 12 | Event | 1994 – The Boeing 777, the world's largest twinjet, makes its first flight. |
| 67003 | June 12 | Event | 1996 – In Philadelphia, a panel of federal judges blocks a law against indecency on the internet. |
| 67004 | June 12 | Event | 1997 – Queen Elizabeth II reopens the Globe Theatre in London. |
| 67005 | June 12 | Event | 1999 – Kosovo War: Operation Joint Guardian begins when a NATO-led United Nations peacekeeping force (KFor) enters the province of Kosovo in Federal Republic of Yugoslavia. |
| 67006 | June 12 | Event | 2009 – A disputed presidential election in Iran leads to wide ranging protests in Iran and around the world. |
| 67007 | June 12 | Birth | 1107 – Emperor Gaozong of Song (d. 1187) |
| 67008 | June 12 | Birth | 1161 – Constance, Duchess of Brittany (d. 1201) |
| 67009 | June 12 | Birth | 1519 – Cosimo I de' Medici, Grand Duke of Tuscany (d. 1574) |
| 67010 | June 12 | Birth | 1561 – Anna of Württemberg (d. 1616) |
| 67011 | June 12 | Birth | 1573 – Robert Radclyffe, 5th Earl of Sussex, soldier (d. 1629) |
| 67012 | June 12 | Birth | 1577 – Paul Guldin, Swiss astronomer and mathematician (d. 1643) |
| 67013 | June 12 | Birth | 1711 – Louis Legrand, French priest and theologian (d. 1780) |
| 67014 | June 12 | Birth | 1760 – Jean-Baptiste Louvet de Couvrai, French author, playwright, journalist, and politician (d. 1797) |
| 67015 | June 12 | Birth | 1771 – Patrick Gass, American sergeant and author (d. 1870) |
| 67016 | June 12 | Birth | 1775 – Karl Freiherr von Müffling, Prussian field marshal (d. 1851) |
| 67017 | June 12 | Birth | 1777 – Robert Clark, American physician and politician (d. 1837) |
| 67018 | June 12 | Birth | 1795 – John Marston, American sailor (d. 1885) |
| 67019 | June 12 | Birth | 1802 – Harriet Martineau, English sociologist and author (d. 1876) |
| 67020 | June 12 | Birth | 1806 – John A. Roebling, German-American engineer, designed the Brooklyn Bridge (d. 1869) |