2nd » Transnistria is unilaterally proclaimed a Soviet Union or Soviet republic; the Presidium of the Supreme Soviet called Soviet president Mikhail Gorbachev declares the decision null and void.
5th » Sri Lankan Civil War: Sri Lankan Army soldiers Eastern University massacre called slaughter 158 civilians.
9th » 1990 Batticaloa massacre, massacre of 184 minority Tamil people named Tamil civilians by Sri Lankan Army in the eastern Batticaloa District of Sri Lanka.
12th » The two German states and the Four Powers sign the Treaty on the Final Settlement with Respect to Germany in Moscow, paving the way for German reunification.
15th » France announces it will send 4,000 troops to the Persian Gulf.
18th » Liechtenstein becomes a member of the United Nations.
20th » South Ossetia declares its independence from Georgia (country) known as Georgia.
24th » Periodic Great White Spot is observed on Saturn.
29th » Construction of the Washington National Cathedral is completed.
29th » The YF-22, which would later become the F-22 Raptor, flies for the first time.