Unix Timestamp: 643248000
Monday, May 21. 1990, 12:00:00 AM UTC

In the Colombian presidential election, César Gaviria is elected President of Colombia he takes office on August 7.

Cold War: The leaders of the Yemen Arab Republic and the People's Democratic Republic of Yemen announce the unification of their countries as the Republic of Yemen.

Mikhail Gorbachev arrives in Ottawa for a 29-hour visit.

Cold War: The leaders of the Yemen Arab Republic and the People's Democratic Republic of Yemen announce the unification of their countries as the Republic of Yemen.

Microsoft releases Windows 3.0.

In the Burmese general election, Burma's first multiparty election in 30 years, the National League for Democracy led by Aung San Suu Kyi wins in a landslide, but the State Law and Order Restoration Council nullifies the election results.

In Kashmir, a Kashmiri Islamic leader is assassinated and Indian security forces open fire on mourners carrying his body, killing at least 47 people.

European Bank for Reconstruction and Development (EBRD) founded.

Boris Yeltsin is elected as the first ever elected president of the Russian Soviet Federative Socialist Republic.