| 145306 | December 26 | Event | 1790 – Louis XVI of France gives his public assent to Civil Constitution of the Clergy during the French Revolution. |
| 145307 | December 26 | Event | 1793 – Second Battle of Wissembourg: France defeat Austria. |
| 145308 | December 26 | Event | 1793 – The wedding of Prince Friedrich Ludwig of Prussia and Frederica of Mecklenburg-Strelitz takes place. |
| 145309 | December 26 | Event | 1799 – Four thousand people attend George Washington's funeral where Henry Lee III declares him as "first in war, first in peace and first in the hearts of his countrymen." |
| 145310 | December 26 | Event | 1805 – Austria and France sign the Treaty of Pressburg. |
| 145311 | December 26 | Event | 1806 – Battles of Pultusk and Golymin: Russian forces hold French forces under Napoleon. |
| 145312 | December 26 | Event | 1811 – A theater fire in Richmond, Virginia kills the Governor of Virginia George William Smith and the president of the First National Bank of Virginia Abraham B. Venable. |
| 145313 | December 26 | Event | 1825 – Advocates of liberalism in Russia rise up against Czar Nicholas I and are put down in the Decembrist revolt in Saint Petersburg. |
| 145314 | December 26 | Event | 1846 – Trapped in snow in the Sierra Nevadas and without food, members of the Donner Party resort to cannibalism. |
| 145315 | December 26 | Event | 1860 – The first ever inter-club association football match takes place between Hallam F.C. and Sheffield F.C. at the Sandygate Road ground in Sheffield, England, United Kingdom. |
| 145316 | December 26 | Event | 1861 – American Civil War: The Trent Affair: Confederate diplomatic envoys James M. Mason and John Slidell are freed by the United States government, thus heading off a possible war between the United States and United Kingdom. |
| 145317 | December 26 | Event | 1862 – American Civil War: The Battle of Chickasaw Bayou begins. |
| 145318 | December 26 | Event | 1862 – Four nuns serving as volunteer nurses on board USS Red Rover are the first female nurses on a U.S. Navy hospital ship. |
| 145319 | December 26 | Event | 1862 – The largest mass-hanging in U.S. history took place in Mankato, Minnesota, 38 Native Americans died. |
| 145320 | December 26 | Event | 1870 – The 12.8-km long Fréjus Rail Tunnel through the Alps is completed. |
| 145291 | December 25 | Death | 2014 – Alberta Adams, American singer (b. 1917) |
| 145292 | December 25 | Death | 2014 – N. L. Balakrishnan, Indian actor and photographer (b. 1943) |
| 145293 | December 25 | Death | 2014 – Ricardo Porro, Cuban-French architect (b. 1925) |
| 145294 | December 25 | Death | 2014 – David Ryall, English actor (b. 1935) |
| 145295 | December 25 | Death | 2014 – Gleb Yakunin, Russian priest and activist (b. 1934) |
| 145296 | December 25 | Holiday and observance | Christian feast day:Anastasia of Sirmium (Catholic Church)December 25 (Eastern Orthodox liturgics) |
| 145297 | December 25 | Holiday and observance | Christmas Day, Christian holiday commemorating the birth of Jesus. (International) |
| 145298 | December 25 | Holiday and observance | Constitution Day (Taiwan) |
| 145299 | December 25 | Holiday and observance | Malkh-Festival (Nakh peoples of Chechnya and Ingushetia) |
| 145300 | December 25 | Holiday and observance | Quaid-e-Azam's Day (Pakistan) |
| 145301 | December 25 | Holiday and observance | Takanakuy (Chumbivilcas Province, Peru) |
| 145302 | December 25 | Holiday and observance | Good Governance Day (India) |
| 145303 | December 26 | Event | 1135 – Coronation of King Stephen of England. |
| 145304 | December 26 | Event | 1481 – Battle of Westbroek: Holland defeats troops of Utrecht. |
| 145305 | December 26 | Event | 1776 – American Revolutionary War: In the Battle of Trenton, the Continental Army attacks and successfully defeats a garrison of Hessian mercenaries. |