| 28 May 585 BC | Greece [astronomy] | The first accurate prediction of an eclipse of the Sun is made in 585 BC, by the Greek philosopher Thales of Miletus. |
| 28 May 1414 | Mongol Empire, India [political events] | Khizr Khan, the Mongol ruler of the Punjab, India, takes the city of Delhi and establishes the Sayyid dynasty of Delhi. He is initially acting as viceroy for Shah Rukh, successor to the late Timur Leng (Tamerlane), grand amir of the Mongols. |
| 28 May 1444 | France, England, France [treaties] | By the Treaty of Tours, King Charles VII of France makes a truce for two years with King Henry VI of England, who becomes engaged to marry Margaret, daughter of René I, Duke of Anjou. |
| 28 May 1660 | Hanover [births and deaths] | George I, Elector of Hanover 1698–1727 and first Hanoverian king of Great Britain 1714–27, born in Osnabrück, Hanover, Germany (–1727). |
| 28 May 1674 | Germany, Holy Roman Empire [wars] | The Imperial German diet (assembly) at Ratisbon (modern Regensburg) declares war on France. |
| 28 May 1759 | England [births and deaths] | William Pitt the Younger, prime minister of Britain 1783–1801 and 1804–06, a Tory, born in Hayes, Kent, England (–1806). |
| 28 May 1812 | Russian Empire, Ottoman Empire [treaties] | The Treaty of Bucharest ends the war between Russia and the Ottoman Empire. Russia obtains Bessarabia, (an area of southeast Europe bordered by the rivers Dniester and Prut) and withdraws its demand for the provinces of Moldavia and Wallachia. The peace enables Tsar Alexander I to act against the French emperor Napoleon I. |
| 28 May 1919 | Armenia, Anatolia [political events] | Armenia declares its independence from Anatolia (modern Turkey). |
| 28 May 1961 | France, Romania [railways] | The last journey of the ‘Orient Express’, between Paris, France, and Bucharest, Romania, takes place after 78 years of service. |
| 28 May 1972 | UK [births and deaths] | Edward VIII, King of Great Britain and Northern Ireland (January–December 1936) who abdicated to marry the US divorcée Wallis Simpson, dies in Paris, France (77). |
| 28 May 1974 | Northern Ireland [political events] | The Northern Ireland Executive collapses when all the Unionist members resign. On 29 May, Britain reimposes direct rule and the general strike ends. |
| 28 May 1982 | UK, Argentina [Falklands War (1982)] | British troops recapture Port Darwin and Goose Green in the Falkland Islands, taking 1,400 Argentine prisoners. |
| 28 May 1998 | Pakistan [weapons] | Pakistan explodes five nuclear devices. Afterwards, president Rafiq Tarar suspends the country's constitution and declares a state of emergency. US president Clinton announces wide-ranging economic sanctions. |
| 28 May 2003 | England [football] | In the European Champions League football cup final staged in Manchester, England, AC Milan beats Juventus of Turin in a penalty shoot-out following a goalless draw after extra time. It is the first occasion that two Italian clubs have met in the final of the competition. |
| 28–29 May 2007 | Iraq [diplomacy] | The USA and Iran have their first formal contact in nearly three decades as senior officials meet in Baghdad to discuss ways to stabilize Iraq which remains in the grip of sectarian and insurgent violence. |
