| 15582 | February 9 | Event | 1861 – American Civil War: Jefferson Davis is elected the Provisional President of the Confederate States of America by the Confederate convention at Montgomery, Alabama. |
| 15583 | February 9 | Event | 1870 – US president Ulysses S. Grant signs a joint resolution of Congress establishing the U.S. Weather Bureau. |
| 15584 | February 9 | Event | 1889 – US president Grover Cleveland signs a bill elevating the United States Department of Agriculture to a Cabinet-level agency. |
| 15585 | February 9 | Event | 1895 – William G. Morgan creates a game called Mintonette, which soon comes to be referred to as volleyball. |
| 15586 | February 9 | Event | 1900 – The Davis Cup competition is established. |
| 15587 | February 9 | Event | 1904 – Russo-Japanese War: Battle of Port Arthur concludes. |
| 15588 | February 9 | Event | 1913 – A group of meteors is visible across much of the eastern seaboard of North and South America, leading astronomers to conclude the source had been a small, short-lived natural satellite of the Earth. |
| 15589 | February 9 | Event | 1920 – Under the terms of the Svalbard Treaty, international diplomacy recognizes Norwegian sovereignty over Arctic archipelago Svalbard, and designates it as demilitarized. |
| 15590 | February 9 | Event | 1922 – Brazil becomes a member of the Berne Convention copyright treaty. |
| 15591 | February 9 | Event | 1934 – The Balkan Entente is formed. |
| 15592 | February 9 | Event | 1942 – World War II: Top United States military leaders hold their first formal meeting to discuss American military strategy in the war. |
| 15593 | February 9 | Event | 1942 – Year-round Daylight saving time is re-instated in the United States as a wartime measure to help conserve energy resources. |
| 15594 | February 9 | Event | 1943 – World War II: Allied authorities declare Guadalcanal secure after Imperial Japan evacuates its remaining forces from the island, ending the Battle of Guadalcanal. |
| 15595 | February 9 | Event | 1945 – World War II: The Battle of the Atlantic – HMS Venturer sinks U-864 off the coast of Fedje, Norway, in a rare instance of submarine-to-submarine combat. |
| 15596 | February 9 | Event | 1945 – World War II: A force of Allied aircraft unsuccessfully attacked a German destroyer in Førdefjorden, Norway. |
| 15597 | February 9 | Event | 1950 – Second Red Scare: US Senator Joseph McCarthy accuses the United States Department of State of being filled with Communists. |
| 15598 | February 9 | Event | 1951 – Korean War: Geochang massacre |
| 15599 | February 9 | Event | 1959 – The R-7 Semyorka, the first intercontinental ballistic missile, becomes operational at Plesetsk, USSR. |
| 15600 | February 9 | Event | 1964 – The Beatles make their first appearance on The Ed Sullivan Show, performing before a "record-busting" audience of 73 million viewers across the USA. |
| 15571 | February 8 | Holiday and observance | Nirvana Day (Mahayana Buddhism) |
| 15572 | February 8 | Holiday and observance | Prešeren Day (Slovenia) |
| 15573 | February 8 | Holiday and observance | Propose Day |
| 15574 | February 9 | Event | 474 – Zeno crowned as co-emperor of the Byzantine Empire. |
| 15575 | February 9 | Event | 1555 – Bishop of Gloucester John Hooper is burned at the stake. |
| 15576 | February 9 | Event | 1621 – Gregory XV becomes Pope, the last Pope elected by acclamation. |
| 15577 | February 9 | Event | 1654 – The Capture of Fort Rocher takes place during the Anglo-Spanish War. |
| 15578 | February 9 | Event | 1775 – American Revolutionary War: The British Parliament declares Massachusetts in rebellion. |
| 15579 | February 9 | Event | 1788 – The Habsburg Empire joins the Russo-Turkish War in the Russian camp. |
| 15580 | February 9 | Event | 1825 – After no candidate receives a majority of electoral votes in the US presidential election of 1824, the United States House of Representatives elects John Quincy Adams as President of the United States. |
| 15581 | February 9 | Event | 1849 – New Roman Republic established |