| Date | Event |
|---|---|
| September 02 1990 | Transnistria Unilaterally Proclaimed Republic |
| September 05 1990 | Civilians Slaughtered By Sri Lankan Army |
| September 09 1990 | 184 People Died In The Batticaloa Massacre |
| September 10 1990 | Pope John Paul II Consecrates Churches |
| September 12 1990 | Final Settlement Treaty Allows German Reunification |
| September 15 1990 | France Sends Troops To Persian Gulf |
| September 16 1990 | Railroad From China To Kazakhstan Completed |
| September 18 1990 | Liechtenstein Gains Membership To The UN |
| September 20 1990 | South Ossetia Declares Independence From Georgia |
| September 24 1990 | Saturn's Periodic Great White Spot |
| September 29 1990 | Washington National Cathedral Construction Completed |
| September 29 1990 | F-22 Raptor Flies For The First Time |
| September 30 1990 | Dalai Lama Unveils Human Rights Tribute In Ottawa |