| 122311 | October 25 | Holiday and observance | Day of the Basque Country (Basque Country) |
| 122312 | October 25 | Holiday and observance | Earliest day on which Nevada Day can fall, while October 31 is the latest celebrated on last Friday in October. (Nevada) |
| 122313 | October 25 | Holiday and observance | Earliest day on which October Holiday can fall, while October 31 is the latest observed on last Monday in October. (Ireland) |
| 122314 | October 25 | Holiday and observance | Earliest day on which Teacher's Day (Australia) can fall, while October 31 is the latest celebrated on last Friday in October. (Australia) |
| 122315 | October 25 | Holiday and observance | Retrocession Day (Taiwan) |
| 122316 | October 25 | Holiday and observance | Sovereignty Day (Slovenia) |
| 122317 | October 25 | Holiday and observance | Thanksgiving Day (Grenada) |
| 122318 | October 26 | Event | 306 – Martyrdom of Saint Demetrius of Thessaloniki. |
| 122319 | October 26 | Event | 1185 – The Uprising of Asen and Peter begins on the feast day of St. Demetrius of Thessaloniki and ends with the creation of the Second Bulgarian Empire, ruled by the Asen dynasty. |
| 122320 | October 26 | Event | 1341 – The Byzantine civil war of 1341–47 formally begins with the proclamation of John VI Kantakouzenos as Byzantine Emperor at Didymoteicho. |
| 122321 | October 26 | Event | 1377 – Tvrtko I is crowned the first king of Bosnia. |
| 122322 | October 26 | Event | 1520 – Charles V is crowned. |
| 122323 | October 26 | Event | 1597 – Imjin War: Admiral Yi Sun-sin routs the Japanese Navy of 300 ships with only 13 ships at the Battle of Myeongnyang. |
| 122324 | October 26 | Event | 1640 – The Treaty of Ripon is signed, restoring peace between Scotland and Charles I of England. |
| 122325 | October 26 | Event | 1689 – General Piccolomini of Austria burns down Skopje to prevent the spread of cholera. He died of cholera himself soon after. |
| 122326 | October 26 | Event | 1774 – The first Continental Congress adjourns in Philadelphia. |
| 122327 | October 26 | Event | 1775 – King George III of Great Britain goes before Parliament to declare the American colonies in rebellion, and authorized a military response to quell the American Revolution. |
| 122328 | October 26 | Event | 1776 – Benjamin Franklin departs from America for France on a mission to seek French support for the American Revolution. |
| 122329 | October 26 | Event | 1811 – The Argentine government declare the freedom of expression for the press by decree. |
| 122330 | October 26 | Event | 1813 – War of 1812: A combined force of British regulars, Canadian militia, and Mohawks defeat the Americans in the Battle of the Chateauguay. |
| 122331 | October 26 | Event | 1825 – The Erie Canal opens: Passage from Albany, New York to Lake Erie. |
| 122332 | October 26 | Event | 1859 – The Royal Charter is wrecked on the coast of Anglesey, north Wales with 459 dead. |
| 122333 | October 26 | Event | 1860 – Meeting of Teano. Giuseppe Garibaldi, conqueror of the Kingdom of the Two Sicilies, gives it to King Victor Emmanuel II of Italy. |
| 122334 | October 26 | Event | 1861 – The Pony Express officially ceases operations. |
| 122335 | October 26 | Event | 1863 – The Football Association, the oldest football association in the world, is formed in London. |
| 122336 | October 26 | Event | 1881 – The Gunfight at the O.K. Corral takes place at Tombstone, Arizona. |
| 122337 | October 26 | Event | 1905 – Sweden accepted the independence of Norway. |
| 122338 | October 26 | Event | 1909 – Itō Hirobumi, four time Prime Minister of Japan (the 1st, 5th, 7th and 10th) and Resident-General of Korea, is assassinated by An Jung-geun at the Harbin train station in Manchuria. |
| 122339 | October 26 | Event | 1912 – First Balkan War: The Ottoman occupied city of Thessaloniki, is liberated and unified with Greece on the feast day of its patron saint Demetrius. On the same day, Serbian troops captured Skopje. |
| 122340 | October 26 | Event | 1917 – World War I: Battle of Caporetto Italy suffers a catastrophic defeat to the forces of Austria-Hungary and Germany. The young unknown Oberleutnant Erwin Rommel captures Mount Matajur with only 100 Germans against a force of over 7000 Italians. |