| 62251 | May.30 | Death | 2015 – Jim Bailey, American actor and singer (b. 1938) |
| 62252 | May.30 | Death | 2015 – Beau Biden, American soldier, lawyer, and politician, 44th Attorney General of Delaware (b. 1969) |
| 62253 | May.30 | Death | 2015 – Joël Champetier, Canadian author and screenwriter (b. 1957) |
| 62254 | May.30 | Death | 2015 – Lennie Merullo, American baseball player and scout (b. 1917) |
| 62255 | May.30 | Death | 2015 – L. Tom Perry, American businessman and religious leader (b. 1922) |
| 62256 | May.30 | Holiday and observance | Anguilla Day, commemorates the beginning of the Anguillian Revolution in 1967. (Anguilla) |
| 62257 | May.30 | Holiday and observance | Canary Islands Day (Spain) |
| 62258 | May.30 | Holiday and observance | Christian feast day:Earliest day on which Feast of the Immaculate Heart of Mary can fall, while July 3 is the latest celebrated 20 days after Pentecost. (Catholic Church)Ferdinand III of CastileIsaac of DalmatiaJoan of ArcJoseph MarelloMay 30 (Eastern Ort |
| 62259 | May.30 | Holiday and observance | Indian Arrival Day (Trinidad and Tobago) |
| 62260 | May.30 | Holiday and observance | Lod Massacre Remembrance Day (Puerto Rico) |
| 62261 | May.30 | Holiday and observance | Mother's Day (Nicaragua) |
| 62262 | May.30 | Holiday and observance | Parliament Day (Croatia) |
| 62263 | May.31 | Event | 1279 BC – Ramesses II (The Great) (19th dynasty) becomes pharaoh of Ancient Egypt. |
| 62264 | May.31 | Event | 455 – Emperor Petronius Maximus is stoned to death by an angry mob while fleeing Rome. |
| 62265 | May.31 | Event | 526 – A devastating earthquake strikes Antioch killing 250,000. |
| 62266 | May.31 | Event | 1223 – Mongol invasion of the Cumans: Battle of the Kalka River: Mongol armies of Genghis Khan led by Subutai defeat Kievan Rus' and Cumans. |
| 62267 | May.31 | Event | 1578 – Martin Frobisher sails from Harwich in England to Frobisher Bay in Canada, eventually to mine fool's gold, used to pave streets in London. |
| 62268 | May.31 | Event | 1578 – King Henry III lays the first stone of the Pont Neuf (New Bridge), the oldest bridge of Paris, France. |
| 62269 | May.31 | Event | 1669 – Citing poor eyesight, Samuel Pepys records the last event in his diary. |
| 62270 | May.31 | Event | 1775 – American Revolution: The Mecklenburg Resolves are allegedly adopted in the Province of North Carolina. |
| 62271 | May.31 | Event | 1790 – Manuel Quimper explores the Strait of Juan de Fuca. |
| 62272 | May.31 | Event | 1790 – The United States enacts its first copyright statute, the Copyright Act of 1790. |
| 62273 | May.31 | Event | 1795 – French Revolution: The Revolutionary Tribunal is suppressed. |
| 62274 | May.31 | Event | 1805 – French and Spanish forces begin the assault against British forces occupying Diamond Rock. |
| 62275 | May.31 | Event | 1813 – In Australia, William Lawson, Gregory Blaxland and William Wentworth reach Mount Blaxland, effectively marking the end of a route across the Blue Mountains. |
| 62276 | May.31 | Event | 1854 – The civil death procedure is abolished in France. |
| 62277 | May.31 | Event | 1859 – The clock tower at the Houses of Parliament, which houses Big Ben, starts keeping time. |
| 62278 | May.31 | Event | 1862 – American Civil War Peninsula Campaign: Battle of Seven Pines or (Battle of Fair Oaks): Confederate forces under Joseph E. Johnston & G.W. Smith engage Union forces under George B. McClellan outside Richmond, Virginia. |
| 62279 | May.31 | Event | 1864 – American Civil War Overland Campaign: Battle of Cold Harbor: The Army of Northern Virginia under Robert E. Lee engages the Army of the Potomac under Ulysses S. Grant and George Meade. |
| 62280 | May.31 | Event | 1866 – In the Fenian Invasion of Canada, John O'Neill leads 850 Fenian raiders across the Niagara River at Buffalo, New York/Fort Erie, Ontario, as part of an effort to free Ireland from the United Kingdom. Canadian militia and British regulars repulse th |