| Date | Event |
|---|---|
| September 07 1999 | A 5.9-magnitude Earthquake Hits Athens |
| September 09 1999 | Sega Release Dreamcast |
| September 12 1999 | International Peace-keepers Allowed Into East Timor, Indonesia |
| September 14 1999 | Three Nations Join The United Nations |
| September 21 1999 | Chi-Chi Earthquake In Taiwan Leaves 2400 Dead |
| September 23 1999 | First Celebrate Bisexuality Day In U.S |
| September 23 1999 | Contact Lost With Mars Climate Orbiter |
| September 30 1999 | Japan's Accident At Uranium Reprocessing Facility |