| 25231 | March 5 | Death | 2014 – Ailsa McKay, Scottish economist and academic (b. 1963) |
| 25232 | March 5 | Death | 2014 – Leopoldo María Panero, Spanish poet and translator (b. 1948) |
| 25233 | March 5 | Death | 2014 – Dave Sampson, English singer (b. 1941) |
| 25234 | March 5 | Death | 2015 – Vlada Divljan, Serbian singer-songwriter and guitarist (Idoli and Apartchiks) (b. 1958) |
| 25235 | March 5 | Death | 2015 – Edward Egan, American cardinal (b. 1932) |
| 25236 | March 5 | Death | 2015 – Albert Maysles, American director and producer (b. 1926) |
| 25237 | March 5 | Death | 2015 – Jim McCann, Irish singer and guitarist (The Dubliners and The Ludlows) (b. 1944) |
| 25238 | March 5 | Death | 2015 – Dirk Shafer, American model, actor, and director (b. 1962) |
| 25239 | March 5 | Holiday and observance | Christian feast day:John Joseph of the CrossCiarán of Saigir (Irish calendar)Theophilus, bishop of CaesareaThietmar of MindenMarch 5 (Eastern Orthodox liturgics) |
| 25240 | March 5 | Holiday and observance | Custom Chief's Day (Vanuatu) |
| 25241 | March 5 | Holiday and observance | Lantern Festival (China) |
| 25242 | March 5 | Holiday and observance | Learn from Lei Feng Day (China) |
| 25243 | March 5 | Holiday and observance | National Tree Planting Day (Iran) |
| 25244 | March 5 | Holiday and observance | St Piran's Day (Cornwall) |
| 25245 | March 5 | Holiday and observance | Purim ends |
| 25246 | March 6 | Event | 12 BC – The Roman Emperor Augustus is named Pontifex Maximus, incorporating the position into that of the Emperor. |
| 25247 | March 6 | Event | 845 – Execution of the 42 Martyrs of Amorium at Samarra |
| 25248 | March 6 | Event | 961 – Byzantine conquest of Chandax by Nikephoros Phokas, end of the Emirate of Crete |
| 25249 | March 6 | Event | 1204 – The Siege of Château Gaillard ends in a French victory over King John of England, who loses control of Normandy to King Philip II Augustus. |
| 25250 | March 6 | Event | 1454 – Thirteen Years' War: Delegates of the Prussian Confederation pledge allegiance to King Casimir IV of Poland who agrees to commit his forces in aiding the Confederation's struggle for independence from the Teutonic Knights. |
| 25251 | March 6 | Event | 1521 – Ferdinand Magellan arrives at Guam. |
| 25252 | March 6 | Event | 1665 – The first joint Secretary of the Royal Society, Henry Oldenburg, publishes the first issue of Philosophical Transactions of the Royal Society |
| 25253 | March 6 | Event | 1788 – The First Fleet arrives at Norfolk Island in order to found a convict settlement. |
| 25254 | March 6 | Event | 1820 – The Missouri Compromise is signed into law by President James Monroe. The compromise allows Missouri to enter the Union as a slave state, brings Maine into the Union as a free state, and makes the rest of the northern part of the Louisiana Purchase |
| 25255 | March 6 | Event | 1834 – York, Upper Canada is incorporated as Toronto. |
| 25256 | March 6 | Event | 1836 – Texas Revolution: Battle of the Alamo – After a thirteen-day siege by an army of 3,000 Mexican troops, the 187 Texas volunteers, including frontiersman Davy Crockett and colonel Jim Bowie, defending the Alamo are killed and the fort is captured. |
| 25257 | March 6 | Event | 1857 – The Supreme Court of the United States rules in the Dred Scott v. Sandford case. |
| 25258 | March 6 | Event | 1869 – Dmitri Mendeleev presents the first periodic table to the Russian Chemical Society. |
| 25259 | March 6 | Event | 1882 – The Serbian kingdom is re-founded. |
| 25260 | March 6 | Event | 1899 – Bayer registers "Aspirin" as a trademark. |