| 140791 | December 13 | Death | 2014 – Bill Bonds, American journalist (b. 1932) |
| 140792 | December 13 | Death | 2014 – William E. May, American theologian and academic (b. 1928) |
| 140793 | December 13 | Death | 2014 – Taitetsu Unno, Japanese scholar and author (b. 1929) |
| 140794 | December 13 | Holiday and observance | Acadian Remembrance Day (Acadians) |
| 140795 | December 13 | Holiday and observance | Christian feast day:December 13 (Eastern Orthodox liturgics)LucyOdile of Alsace |
| 140796 | December 13 | Holiday and observance | Republic Day (Malta) |
| 140797 | December 13 | Holiday and observance | St Lucy's Day (mainly Scandinavia, some regions of Italy (for example, Sicily, Veneto and Trentino), and Malta), and its related observances:National Day, celebrates the independence of Saint Lucia from United Kingdom in 1979. |
| 140798 | December 13 | Holiday and observance | Tellus was worshipped in the district Carinae at the Esquiline Hill, and a lectisternium or table was spread for Ceres. (Roman Empire) |
| 140799 | December 14 | Event | 557 – Constantinople is severely damaged by an earthquake. |
| 140800 | December 14 | Event | 835 – Sweet Dew Incident: Emperor Wenzong of the Tang dynasty conspires to kill the powerful eunuchs of the Tang court, but the plot is foiled. |
| 140801 | December 14 | Event | 1287 – St. Lucia's flood: The Zuiderzee sea wall in the Netherlands collapses, killing over 50,000 people. |
| 140802 | December 14 | Event | 1542 – Princess Mary Stuart becomes Mary, Queen of Scots. |
| 140803 | December 14 | Event | 1751 – The Theresian Military Academy is founded as the first military academy in the world. |
| 140804 | December 14 | Event | 1782 – The Montgolfier brothers' first balloon lifts off on its first test flight. |
| 140805 | December 14 | Event | 1812 – The French invasion of Russia comes to an end as the remnants of the Grande Armée are expelled from Russia. |
| 140806 | December 14 | Event | 1814 – War of 1812: The Royal Navy seizes control of Lake Borgne, Louisiana. |
| 140807 | December 14 | Event | 1819 – Alabama becomes the 22nd U.S. state. |
| 140808 | December 14 | Event | 1836 – The Toledo War unofficially ends. |
| 140809 | December 14 | Event | 1896 – The Glasgow Underground Railway is opened by the Glasgow District Subway Company. |
| 140810 | December 14 | Event | 1900 – Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law. |
| 140811 | December 14 | Event | 1902 – The Commercial Pacific Cable Company lays the first Pacific telegraph cable, from San Francisco to Honolulu. |
| 140812 | December 14 | Event | 1903 – The Wright brothers make their first attempt to fly with the Wright Flyer at Kitty Hawk, North Carolina. |
| 140813 | December 14 | Event | 1907 – The schooner Thomas W. Lawson runs aground and founders near the Hellweather's Reef within the Isles of Scilly in a gale. The pilot and 15 seamen die. |
| 140814 | December 14 | Event | 1909 – New South Wales Premier Charles Wade signs the Seat of Government Surrender Act 1909, formally completing the transfer of State land to the Commonwealth to create the Australian Capital Territory. |
| 140815 | December 14 | Event | 1911 – Roald Amundsen 's team, comprising himself, Olav Bjaaland, Helmer Hanssen, Sverre Hassel, and Oscar Wisting, becomes the first to reach the South Pole. |
| 140816 | December 14 | Event | 1913 – Haruna, the fourth and last Kongō-class ship, launches, eventually becoming one of the Japanese workhorses during World War I and World War II. |
| 140817 | December 14 | Event | 1914 – Lisandro de la Torre and others found the Democratic Progressive Party (Partido Demócrata Progresista, PDP) at the Hotel Savoy, Buenos Aires, Argentina. |
| 140818 | December 14 | Event | 1918 – Friedrich Karl von Hessen, a German prince elected by the Parliament of Finland to become King Väinö I, renounces the Finnish throne. |
| 140819 | December 14 | Event | 1918 – Portuguese President Sidónio Pais is assassinated. |
| 140820 | December 14 | Event | 1939 – Winter War: The Soviet Union is expelled from the League of Nations for invading Finland. |