The first meeting of the Constituent Assembly of Nepal formally declares Nepal a republic, ending the 240-year reign of the Shah dynasty.

The Iraqi Governing Council chooses Ayad Allawi, a longtime anti-Saddam Hussein exile, as prime minister of Iraq's interim government.

Peter Hollingworth becomes the first Governor-General of Australia to resign his office as a result of criticism of his conduct.

The ''Mars Odyssey'' finds signs of large ice deposits on the planet Mars.

NATO declares Russia a limited partner in the Western alliance.

Two Swedish police officers are murdered with their own fire arms by the bank robbers Jackie Arklöv and Tony Olsson after a car chase.

In Milan, Italy, after 22 years of restoration work, Leonardo da Vinci's masterpiece ''The Last Supper'' is put back on display.

Nuclear testing: Pakistan responds to a series of nuclear tests by India with five of its own, prompting the United States, Japan, and other nations to impose economic sanctions.

U.S. President Bill Clinton's former business partners in the Whitewater land deal, James McDougal and Susan McDougal, and the Governor of Arkansas Jim Guy Tucker, are convicted of fraud.

The Russian town of Neftegorsk is hit by a 7.6 magnitude earthquake that kills at least 2,000 people, half of the total population.

Eritrea and Monaco join the United Nations.

The capital city of Addis Ababa, falls to the Ethiopian People's Revolutionary Democratic Front, ending both the Derg regime in Ethiopia and the Ethiopian Civil War.

A robot probe finds the wreckage of the {{USS|Monitor}} near Cape Hatteras, North Carolina.

19-year-old West German pilot Mathias Rust evades Soviet Union air defenses and lands a private plane in the Red Square in Moscow. He is immediately detained and will not be released until August 3, 1988.

Falklands War: British forces defeat the Argentines at the Battle of Goose Green.

Constantine Karamanlis signs the full treaty of the accession of Greece with the European Economic Community.

Second round of the presidential elections in Upper Volta. The election is won by incumbent Sangoulé Lamizana.

In Southgate, Kentucky, the Beverly Hills Supper Club is engulfed in fire, killing 165 people inside.

Fifteen West African countries sign the Treaty of Lagos, creating the Economic Community of West African States.

Northern Ireland's power-sharing Sunningdale Agreement collapses following a general strike by loyalists.

The formerly united Free University of Brussels officially splits into two separate entities, the French-speaking Université Libre de Bruxelles and the Dutch-speaking Vrije Universiteit Brussel.

The Palestine Liberation Organization is formed.

Peter Benenson's article ''The Forgotten Prisoners'' is published in several internationally read newspapers. This will later be thought of as the founding of the human rights organization Amnesty International.

Henry Bolte becomes Premier of the Australian state of Victoria.

The women of Greece are given the right to vote.

Memphis Kiddie Park opens in Brooklyn, Ohio. The park's Little Dipper roller coaster would become the oldest operating steel roller coaster in North America.

World War II: in retaliation for the assassination of Reinhard Heydrich, Nazis in Czechoslovakia kill over 1,800 people.

World War II: Norwegian, French, Polish and British forces recapture Narvik in Norway. This is the first allied infantry victory of the War.

World War II: Belgium surrenders to Germany.

The Golden Gate Bridge in San Francisco, California, is officially opened by President Franklin D. Roosevelt in Washington, D.C., who pushes a button signaling the start of vehicle traffic over the span.

Alan Turing submits ''On Computable Numbers'' for publication.

The Glyndebourne festival in England is inaugurated.

Near Callander, Ontario, the Dionne quintuplets are born to Oliva and Elzire Dionne; they will be the first quintuplets to survive infancy.

The Chrysler Building in New York City officially opens.

28th May 1926 coup d'état: Ditadura Nacional is established in Portugal to suppress the unrest of the First Republic.

The Azerbaijan Democratic Republic and the Democratic Republic of Armenia declare their independence.

Russo-Japanese War: The Battle of Tsushima ends with the destruction of the Russian Baltic Fleet by Admiral Togo Heihachiro and the Imperial Japanese Navy.

In San Francisco, California, John Muir organizes the Sierra Club.

American Civil War: The 54th Massachusetts Volunteer Infantry, the first African American regiment, leaves Boston, Massachusetts, to fight for the Union.

Big Ben is drawn on a carriage pulled by 16 horses from Whitechapel Bell Foundry to the Palace of Westminster.

President Andrew Jackson signs the Indian Removal Act which relocates Native Americans.

French and Indian War: in the first engagement of the war, Virginia militia under 22-year-old Lieutenant Colonel George Washington defeat a French reconnaissance party in the Battle of Jumonville Glen in what is now Fayette County in southwestern Pennsylvania.

Bolton Massacre by Royalist troops under the command of the Earl of Derby.

The Spanish Armada, with 130 ships and 30,000 men, sets sail from Lisbon heading for the English Channel. (It will take until May 30 for all ships to leave port).

The Archbishop of Canterbury Thomas Cranmer declares the marriage of King Henry VIII of England to Anne Boleyn valid.

James IV of Scotland and Margaret Tudor are married according to a Papal Bull by Pope Alexander VI. A Treaty of Everlasting Peace between Scotland and England signed on that occasion results in a peace that lasts ten years.