| 9961 | January 23 | Death | 2014 – Khin Yu May, Burmese actress and singer (b. 1937) |
| 9962 | January 23 | Death | 2015 – Ernie Banks, American baseball player and coach (b. 1931) |
| 9963 | January 23 | Death | 2015 – Prosper Ego, Dutch activist founded Oud-Strijders Legioen (b. 1927) |
| 9964 | January 23 | Death | 2015 – Abdullah of Saudi Arabia (b. 1924) |
| 9965 | January 23 | Death | 2015 – Jackie Selebi, South African police officer (b. 1950) |
| 9966 | January 23 | Holiday and observance | Bounty Day (Pitcairn Island) |
| 9967 | January 23 | Holiday and observance | Christian feast day:AbakuhMarianne of MolokaiEmerentianaEspousals of the Blessed Virgin MaryIldefonsus of ToledoPhillips Brooks (Episcopal Church (USA))January 23 (Eastern Orthodox liturgics) |
| 9968 | January 24 | Event | 41 – Roman Emperor Caligula, known for his eccentricity and sadistic despotism, is assassinated by his disgruntled Praetorian Guards. The Guard then proclaims Caligula's uncle Claudius as Emperor |
| 9969 | January 24 | Event | 1438 – The Council of Basel suspends Pope Eugene IV. |
| 9970 | January 24 | Event | 1458 – Matthias Corvinus becomes king of Hungary. |
| 9971 | January 24 | Event | 1624 – Afonso Mendes, appointed by Pope Gregory XV as Prelate of Ethiopia, arrives at Massawa from Goa. |
| 9972 | January 24 | Event | 1679 – King Charles II of England dissolves the Cavalier Parliament. |
| 9973 | January 24 | Event | 1739 – Peshva warrior Chimnaji Appa defeats Portuguese forces and captures Tarapur Fort, India. |
| 9974 | January 24 | Event | 1742 – Charles VII Albert becomes Holy Roman Emperor. |
| 9975 | January 24 | Event | 1758 – During the Seven Years' War the leading burghers of Königsberg submit to Elizabeth of Russia, thus forming Russian Prussia (until 1763) |
| 9976 | January 24 | Event | 1817 – Crossing of the Andes: Many soldiers of Juan Gregorio de las Heras are captured during the Action of Picheuta. |
| 9977 | January 24 | Event | 1835 – Slaves in Salvador da Bahia, Brazil, stage a revolt, which is instrumental in ending slavery there 50 years later. |
| 9978 | January 24 | Event | 1848 – California Gold Rush: James W. Marshall finds gold at Sutter's Mill near Sacramento. |
| 9979 | January 24 | Event | 1857 – The University of Calcutta is formally founded as the first fully fledged university in South Asia. |
| 9980 | January 24 | Event | 1859 – Political and state union of Moldavia and Wallachia Alexandru Ioan Cuza is elected as Domnitor in both Principalities. |
| 9981 | January 24 | Event | 1862 – Bucharest is proclaimed the capital of Romania. |
| 9982 | January 24 | Event | 1878 – The revolutionary Vera Zasulich shoots at Fyodor Trepov, the Governor of Saint Petersburg. |
| 9983 | January 24 | Event | 1900 – Second Boer War: Boers stop a British attempt to break the Siege of Ladysmith in the Battle of Spion Kop. |
| 9984 | January 24 | Event | 1908 – The first Boy Scout troop is organized in England by Robert Baden-Powell. |
| 9985 | January 24 | Event | 1911 – Japanese anarchist Shūsui Kōtoku is hanged for treason in a case now considered a miscarriage of justice. |
| 9986 | January 24 | Event | 1915 – World War One: British Grand Fleet battle cruisers under Vice-Admiral Sir David Beatty engage Rear-Admiral Franz von Hipper's battle cruisers in the Battle of Dogger Bank. |
| 9987 | January 24 | Event | 1916 – In Brushaber v. Union Pacific Railroad Co., the Supreme Court of the United States declares the federal income tax constitutional. |
| 9988 | January 24 | Event | 1918 – The Gregorian calendar is introduced in Russia by decree of the Council of People's Commissars effective February 14(NS) |
| 9989 | January 24 | Event | 1933 – The 20th Amendment to the United States Constitution is ratified, changing the beginning and end of terms for all elected federal offices. |
| 9990 | January 24 | Event | 1939 – The deadliest earthquake in Chilean history strikes Chillán, killing approximately 28,000 people. |