| 20911 | February 23 | Death | 2014 – Roger Hilsman, American soldier, academic, and politician (b. 1919) |
| 20912 | February 23 | Death | 2014 – Samuel Sheinbein, American-Israeli murderer (b. 1980) |
| 20913 | February 23 | Death | 2015 – Rana Bhagwandas, Pakistani lawyer and judge, Chief Justice of Pakistan (b. 1942) |
| 20914 | February 23 | Death | 2015 – W. E. "Bill" Dykes, American soldier and politician (b. 1925) |
| 20915 | February 23 | Death | 2015 – Jerry Lambert, American jockey (b. 1940) |
| 20916 | February 23 | Death | 2015 – R. C. Sakthi, Indian actor and director (b. 1940) |
| 20917 | February 23 | Holiday and observance | Christian feast day:Polycarp of SmyrnaSerenus the GardenerFebruary 23 (Eastern Orthodox liturgics) |
| 20918 | February 23 | Holiday and observance | Mashramani-Republic Day (Guyana) |
| 20919 | February 23 | Holiday and observance | National Day (Brunei) |
| 20920 | February 23 | Holiday and observance | Red Army Day or Day of Soviet Army and Navy in the former Soviet Union, also held in various former Soviet republics:Defender of the Fatherland Day (Russia)Defender of the Fatherland and Armed Forces day (Belarus) |
| 20921 | February 23 | Holiday and observance | Terminalia held in honor of Terminus (Ancient Rome) |
| 20922 | February 24 | Event | 303 – Galerius publishes his edict that begins the persecution of Christians in his portion of the Roman Empire. |
| 20923 | February 24 | Event | 484 – King Huneric removes the Christian bishops from their offices and banished some to Corsica. A few are martyred, including former proconsul Victorian along with Frumentius and other merchants. They are killed at Hadrumetum after refusing to become Ar |
| 20924 | February 24 | Event | 1303 – Battle of Roslin, of the First War of Scottish Independence. |
| 20925 | February 24 | Event | 1387 – King Charles III of Naples and Hungary is assassinated at Buda. |
| 20926 | February 24 | Event | 1525 – Spanish-Imperial army defeat French army at Battle of Pavia. |
| 20927 | February 24 | Event | 1538 – Treaty of Nagyvárad between Ferdinand I and John Zápolya. |
| 20928 | February 24 | Event | 1582 – With the papal bull Inter gravissimas, Pope Gregory XIII announces the Gregorian calendar. |
| 20929 | February 24 | Event | 1607 – L'Orfeo by Claudio Monteverdi, one of the first works recognized as an opera, receives its première performance. |
| 20930 | February 24 | Event | 1711 – The London première of Rinaldo by George Frideric Handel, the first Italian opera written for the London stage. |
| 20931 | February 24 | Event | 1803 – In Marbury v. Madison, the Supreme Court of the United States establishes the principle of judicial review. |
| 20932 | February 24 | Event | 1809 – London's Drury Lane Theatre burns to the ground, leaving owner Richard Brinsley Sheridan destitute. |
| 20933 | February 24 | Event | 1821 – Final stage of the Mexican War of Independence from Spain with Plan of Iguala . |
| 20934 | February 24 | Event | 1822 – The first Swaminarayan temple in the world, Shri Swaminarayan Mandir, Ahmedabad, is inaugurated. |
| 20935 | February 24 | Event | 1826 – The signing of the Treaty of Yandabo marks the end of the First Anglo-Burmese War. |
| 20936 | February 24 | Event | 1831 – The Treaty of Dancing Rabbit Creek, the first removal treaty in accordance with the Indian Removal Act, is proclaimed. The Choctaws in Mississippi cede land east of the river in exchange for payment and land in the West. |
| 20937 | February 24 | Event | 1848 – King Louis-Philippe of France abdicates the throne. |
| 20938 | February 24 | Event | 1863 – Arizona is organized as a United States territory. |
| 20939 | February 24 | Event | 1868 – Andrew Johnson becomes the first President of the United States to be impeached by the United States House of Representatives. He is later acquitted in the Senate. |
| 20940 | February 24 | Event | 1875 – The SS Gothenburg hits the Great Barrier Reef and sinks off the Australian east coast, killing approximately 100, including a number of high-profile civil servants and dignitaries. |