| 144871 | December 25 | Event | 597 – Augustine of Canterbury and his fellow-labourers baptise in Kent more than 10,000 Anglo-Saxons. |
| 144872 | December 25 | Event | 800 – The Coronation of Charlemagne as Holy Roman Emperor, in Rome. |
| 144873 | December 25 | Event | 1000 – The foundation of the Kingdom of Hungary: Hungary is established as a Christian kingdom by Stephen I of Hungary. |
| 144874 | December 25 | Event | 1025 – Coronation of Mieszko II Lambert as king of Poland. |
| 144875 | December 25 | Event | 1066 – William the Conqueror, Duke of Normandy is crowned king of England, at Westminster Abbey, London. |
| 144876 | December 25 | Event | 1076 – Coronation of Bolesław II the Generous as king of Poland. |
| 144877 | December 25 | Event | 1100 – Baldwin of Boulogne is crowned the first King of Jerusalem in the Church of the Nativity. |
| 144878 | December 25 | Event | 1130 – Count Roger II of Sicily is crowned the first king of Sicily. |
| 144879 | December 25 | Event | 1261 – John IV Laskaris of the restored Eastern Roman Empire is deposed and blinded by orders of his co-ruler Michael VIII Palaiologos. |
| 144880 | December 25 | Event | 1492 – Carrack Santa María captained by Christopher Columbus runs onto reefs off Haiti due to a proper watch not being kept. Local natives help to save food, armory and ammunition but not the ship. |
| 144881 | December 25 | Event | 1553 – Battle of Tucapel: Mapuche rebels under Lautaro defeat the Spanish conquistadors and executes the governor of Chile, Pedro de Valdivia. |
| 144882 | December 25 | Event | 1559 – Pope Pius IV is elected. |
| 144883 | December 25 | Event | 1643 – Christmas Island in the Indian Ocean found and named by Captain William Mynors of the English East India Company vessel, the Royal Mary. |
| 144884 | December 25 | Event | 1776 – George Washington and the Continental Army cross the Delaware River at night to attack Hessian forces serving Great Britain at Trenton, New Jersey, the next day. |
| 144885 | December 25 | Event | 1809 – Dr. Ephraim McDowell performs the first ovariotomy, removing a 22-pound tumor. |
| 144886 | December 25 | Event | 1814 – Rev. Samuel Marsden holds the first Christian service on land in New Zealand at Rangihoua Bay. |
| 144887 | December 25 | Event | 1815 – The Handel and Haydn Society, oldest continually performing arts organization in the United States, gives its first performance. |
| 144888 | December 25 | Event | 1826 – The Eggnog Riot at the United States Military Academy concludes after beginning the previous evening. |
| 144889 | December 25 | Event | 1837 – Second Seminole War: American general Zachary Taylor leads 1100 troops against the Seminoles at the Battle of Lake Okeechobee. |
| 144890 | December 25 | Event | 1868 – United States President Andrew Johnson grants unconditional pardon to all Civil War Confederate soldiers. |
| 144891 | December 25 | Event | 1914 – A series of unofficial truces occur across the Western Front to celebrate Christmas. |
| 144892 | December 25 | Event | 1926 – Emperor Taishō of Japan dies. His son, Prince Hirohito, succeeds him as Emperor Shōwa. |
| 144893 | December 25 | Event | 1927 – The Vietnamese Nationalist Party is founded. |
| 144894 | December 25 | Event | 1932 – A magnitude 7.6 earthquake in Gansu, China kills 275 people. |
| 144895 | December 25 | Event | 1941 – Admiral Chester W. Nimitz arrives at Pearl Harbor to assume command of the U.S. Pacific Fleet |
| 144896 | December 25 | Event | 1941 – World War II: Battle of Hong Kong ends, beginning the Japanese occupation of Hong Kong. |
| 144897 | December 25 | Event | 1941 – Admiral Émile Muselier seizes the archipelago of Saint Pierre and Miquelon, which become the first part of France to be liberated by the Free French Forces. |
| 144898 | December 25 | Event | 1946 – The first in Europe artificial, self-sustaining nuclear chain reaction is initiated within Soviet F-1 nuclear reactor. |
| 144899 | December 25 | Event | 1947 – The Constitution of the Republic of China goes into effect. |
| 144900 | December 25 | Event | 1950 – The Stone of Scone, traditional coronation stone of British monarchs, is taken from Westminster Abbey by Scottish nationalist students. It later turns up in Scotland on April 11, 1951. |