February 11–Pluto moves along its eccentric orbit further from the Sun than Neptune. It had been nearer than Neptune since 1979, and will become again in 2231.[2]
February 27– While trying to circumnavigate the world in a hot air balloon, Colin Prescot and Andy Elson set a new endurance record after being aloft for 233 hours and 55 minutes.
Two Libyans suspected of bringing down Pan Am Flight 103 in 1988 are handed over to Scottish authorities for eventual trial in the Netherlands. The United Nations suspends sanctions against Libya.
May 14–June 20 – The 1999 Cricket World Cup is held in England, (some matches in Scotland, Ireland, Wales and the Netherlands), with Australia defeating Pakistan in the final.
June 24 – Kosovo War: NATO marines shoot three gunmen in Kosovo, Yugoslavia after being attacked by the latter, killing one of them and injuring the other two.[8][12]
July 22–25–Woodstock '99 was held in Rome, New York at former Griffiss Air Force Base, which was marred with difficult environmental conditions, poor sanitation, overpriced food and water, looting, violence, rapes, riots and several deaths.
September 8– The first of a series of Russian apartment bombings occurs. Subsequent bombings occur on September 13 and 16, while a bombing on September 22 fails.
September 12– Under international pressure to allow an international peacekeeping force, Indonesian president BJ Habibie announces that he will do so.
Pakistani Prime Minister Nawaz Sharif attempts to dismiss Army Chief General Pervez Musharraf, who is out of the country. The generals lead a coup d'état, ousting Sharif's administration, and Musharraf takes control of the government.
November 6– Australians defeat a referendum proposing the replacement of the Queen and the Governor General with a President to make Australia a republic.
After rowing for 81 days and 5,486 kilometers (2,962 nautical miles), Tori Murden becomes the first woman to cross the Atlantic Ocean by rowboat alone, when she reaches Guadeloupe from the Canary Islands.
Westendorp, Carlos (June 25, 1999). "Decision imposing the Law on the National Anthem of BiH". Sarajevo: Office of the High Representative. Archived from the original on July 9, 2003. Retrieved July 9, 2003. In accordance with my authority under Annex 10 of the General Framework Agreement for Peace in Bosnia and Herzegovina and Article XI of the Bonn Document, I do hereby decide that the Law on the National Anthem of Bosnia and Herzegovina enters into force with immediate effect on an interim basis, until the House of Peoples adopts this law in due form, without amendments and no conditions attached.