| 16th January 1991 | Operation Desert Storm begins with air strikes against Iraq in the Gulf War. |
| 7th February 1991 | The Provisional Irish Republican Army launches a mortar attack on 10 Downing Street during a cabinet meeting. |
| 7th February 1991 | Ground troops cross the Saudi Arabian border and enter Kuwait, thus starting the ground phase of the Gulf War. |
| 14th March 1991 | After serving sixteen years in prison for allegedly bombing a pub in a Provisional Irish Republican Army attack, the "Birmingham Six" are freed when a court determines the police fabricated evidence. |
| 15th March 1991 | Germany formally regains complete independence after the four post-World War II occupying powers (France, United Kingdom, United States and the Soviet Union) relinquish all remaining rights. |
| 29th April 1991 | A tropical cyclone hits Bangladesh, killing an estimated 138,000 people. |
| 25th June 1991 | Croatia and Slovenia declare their independence from Yugoslavia. |
| 11th July 1991 | A Solar Eclipse of record totality occurs. |
| 8th August 1991 | The Warsaw radio mast, the tallest construction ever built, collapses. |
| 13th August 1991 | The Super Nintendo Entertainment System is released in the United States. |
| 6th September 1991 | The Soviet Union recognizes the independence of the Baltic states. |
| 2nd November 1991 | Australia beats England 12-6 at Twickenham Stadium to win the 1991 Rugby World Cup. |
| 5th November 1991 | The body of publishing tycoon Robert Maxwell is found floating in the Atlantic Ocean. |
| 6th November 1991 | The KGB officially stops operations. |
| 22nd December 1991 | One month after Freddie Mercury's death, Queen re-release “Bohemian Rhapsody” and it returns to the top of the British singles charts; sixteen years after the original version. |
| 25th December 1991 | Mikhail Gorbachev resigns as president of the Soviet Union, from which most republics have already disbanded. The 73-year-old state is now expected to dissolve completely. |
| 31st December 1991 | The Soviet Union officially ceases to exist. |