Editing 1999 (section)

===September===
* [[September 3]] &ndash; [[1999 Ontario Highway 401 crash]] occurs, involving 87 vehicles and killing 8.
* [[September 7]] &ndash; The 6.0 {{M|w}} [[1999 Athens earthquake|Athens earthquake]] hits with a maximum [[Mercalli intensity scale|Mercalli intensity]] of IX (''Violent''), killing 143, injuring 800–1,600, and leaving 50,000 homeless.
* [[September 8]] &ndash; The first of a series of [[1999 Russian apartment bombings|Russian apartment bombings]] occurs. Subsequent bombings occur on September 13 and 16, while a bombing on September 22 fails.
* [[September 9]] &ndash; [[Sega]] Releases the [[Sega Dreamcast]], in North America.
* [[September 12]] &ndash; Under international pressure to allow an international peacekeeping force, Indonesian president BJ Habibie announces that he will do so.
* [[September 14]] &ndash; [[Kiribati]], [[Nauru]] and [[Tonga]] join the [[United Nations]].
* [[September 20]] &ndash; Start of the [[1999 Greek stock market crash|Greek stock market crash of 1999]].
* [[September 21]] &ndash; The 7.7 {{M|w}} [[1999 Jiji earthquake|921 earthquake]] (also known as the Jiji earthquake) affects central Taiwan with a maximum Mercali intensity of X (''Extreme'') leaving 2,400 people dead and more than 11,000 injured.