Cyprus, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia, and Slovenia join the European Union, celebrated at the residence of the Irish President in Dublin.
Osama bin Laden, the suspected mastermind behind the September 11 attacks and the FBI's most wanted man, is killed by the United States special forces in Abbottabad, Pakistan.
Christopher Columbus lands on the island of Jamaica and claims it for Spain.
To the Lighthouse by Virginia Woolf is first published.
During a trip to Syria, Pope John Paul II becomes the first pope to enter a mosque.
War of the First Coalition: Napoleon I of France conquers Venice.
The Duke and Duchess of York are crowned as King George VI and Queen Elizabeth of the United Kingdom of Great Britain and Northern Ireland in Westminster Abbey.
Police release a bomb on MOVE headquarters in Philadelphia to end a stand-off, killing six adults and five children, and destroying the homes of 250 city residents.
Severe thunderstorms and a tornado in Bangladesh kill 600 people.
The process of the U.S. Government moving the United States capital city from Philadelphia to Washington, D.C. begins.
The last British Liberal Party government (led by Herbert Henry Asquith) falls.
World War II: Germany occupies Brussels, Belgium.
The Chinese authorities declare martial law in the face of pro-democracy demonstrations, setting the scene for the Tiananmen Square massacre.
The first post-Communist presidential and parliamentary elections are held in Romania.
Slavery is abolished in Colombia, South America.
Jesse Owens of Ohio State University breaks three world records and ties a fourth at the Big Ten Conference Track and Field Championships in Ann Arbor, Michigan.
The U.S. President Ronald Reagan begins his first visit to the Soviet Union when he arrives in Moscow for a superpower summit with the Soviet leader Mikhail Gorbachev.
Space Shuttle Discovery completes the first docking with the International Space Station.