List of 1582 Major News Events in History, Most Important Historical Events in 1582
| Date | Event |
|---|---|
| January 15, 1582 | Truce of Yam-Zapolsky: Russia cedes Livonia to the Polish–Lithuanian Commonwealth. |
| February 24, 1582 | With the papal bull Inter gravissimas, Pope Gregory XIII announces the Gregorian calendar. |
| April 16, 1582 | Spanish conquistador Hernando de Lerma founds the settlement of Salta, Argentina. |
| June 21, 1582 | Sengoku period: Oda Nobunaga, the most powerful of the Japanese daimyōs, is forced to commit suicide by his own general Akechi Mitsuhide. |
| July 2, 1582 | Battle of Yamazaki: Toyotomi Hideyoshi defeats Akechi Mitsuhide. |
| October 4, 1582 | The Gregorian Calendar is introduced by Pope Gregory XIII. |
| October 15, 1582 | Adoption of the Gregorian calendar begins, eventually leading to near-universal adoption. |
| November 28, 1582 | In Stratford-upon-Avon, William Shakespeare and Anne Hathaway pay a £40 (equivalent to £12,261 in 2021) bond in lieu of posting wedding banns, which enables them to marry immediately. |