| 68671 | June 15 | Holiday and observance | Day of Valdemar and Reunion Day (Flag Day) (Denmark) |
| 68672 | June 15 | Holiday and observance | Engineer's Day (Italy) |
| 68673 | June 15 | Holiday and observance | Global Wind Day (international) |
| 68674 | June 15 | Holiday and observance | Mangaia Gospel Day (Mangaia, Cook Islands) |
| 68675 | June 15 | Holiday and observance | National Salvation Day (Azerbaijan) |
| 68676 | June 15 | Holiday and observance | Statehood Day (Arkansas) |
| 68677 | June 16 | Event | 363 – Emperor Julian marches back up the Tigris and burns his fleet of supply ships. During the withdrawal Roman forces suffered several attacks from the Persians. |
| 68678 | June 16 | Event | 632 – Yazdegerd III ascends to the throne as king (shah) of the Persian Empire. He becomes the last ruler of the Sasanian dynasty (modern Iran). |
| 68679 | June 16 | Event | 1407 – Ming–Hồ War: Retired King Hồ Quý Ly and his son King Hồ Hán Thương of Hồ dynasty are captured by the Ming armies. |
| 68680 | June 16 | Event | 1487 – Battle of Stoke Field, the final engagement of the Wars of the Roses. |
| 68681 | June 16 | Event | 1586 – Mary, Queen of Scots, recognizes Philip II of Spain as her heir and successor. |
| 68682 | June 16 | Event | 1745 – War of the Austrian Succession: New England colonial troops under the command of William Pepperrell capture the French Fortress of Louisbourg in Louisbourg, Nova Scotia (Old Style). |
| 68683 | June 16 | Event | 1746 – War of Austrian Succession: Austria and Sardinia defeat a Franco-Spanish army at the Battle of Piacenza. |
| 68684 | June 16 | Event | 1755 – French and Indian War: The French surrender Fort Beauséjour to the British, leading to the expulsion of the Acadians. |
| 68685 | June 16 | Event | 1774 – Foundation of Harrodsburg, Kentucky. |
| 68686 | June 16 | Event | 1779 – Spain declares war on the Kingdom of Great Britain, and the Great Siege of Gibraltar begins. |
| 68687 | June 16 | Event | 1795 – First Battle of Groix otherwise known as "Cornwallis' Retreat". |
| 68688 | June 16 | Event | 1815 – Battle of Ligny and Battle of Quatre Bras, two days before the Battle of Waterloo. |
| 68689 | June 16 | Event | 1816 – At the Villa Diodati, Lord Byron reads Fantasmagoriana to his four house guests — Percy Shelley, Mary Shelley, Claire Clairmont, and John Polidori — and challenges each guest to write a ghost story, which culminates in Mary Shelley writing the nove |
| 68690 | June 16 | Event | 1836 – The formation of the London Working Men's Association gives rise to the Chartist Movement. |
| 68691 | June 16 | Event | 1846 – The Papal conclave of 1846 elects Pope Pius IX, beginning the longest reign in the history of the papacy. |
| 68692 | June 16 | Event | 1858 – Abraham Lincoln delivers his House Divided speech in Springfield, Illinois. |
| 68693 | June 16 | Event | 1858 – The Battle of Morar takes place during the Indian Mutiny. |
| 68694 | June 16 | Event | 1871 – The University Tests Act allows students to enter the Universities of Oxford, Cambridge and Durham without religious tests (except for those intending to study theology). |
| 68695 | June 16 | Event | 1883 – The Victoria Hall theatre panic in Sunderland, England kills 183 children. |
| 68696 | June 16 | Event | 1884 – The first purpose-built roller coaster, LaMarcus Adna Thompson's "Switchback Railway", opens in New York's Coney Island amusement park. |
| 68697 | June 16 | Event | 1891 – John Abbott becomes Canada's third Prime Minister. |
| 68698 | June 16 | Event | 1897 – A treaty annexing the Republic of Hawaii to the United States is signed the Republic would not be dissolved until a year later. |
| 68699 | June 16 | Event | 1903 – The Ford Motor Company is incorporated. |
| 68700 | June 16 | Event | 1903 – Roald Amundsen commences the first east-west navigation of the Northwest Passage, leaving Oslo, Norway. |