- Jan 15 Russia cedes Livonia & Estonia to Poland, loses access to Baltic
- Feb 19 Francis of Valois, Duke of Anjou gains the title Duke of Brabant, the hereditary sovereign of the Dutch United Provinces
Event of Interest
Feb 24 Pope Gregory XIII announces New Style (Gregorian) calendar
Gregory XIII
- Mar 18 Prince William of Orange injured in attack at Antwerp
- Apr 3 Francis of Valois, Duke of Anjou honored as Duke of Gelre, Earl of Zutphen
- Apr 16 Spanish conquistador Hernando de Lerma founds the settlement of Salta in Argentina
- Jun 20 Bishop Domingo de Salazar of Manila suppresses the Philippines
- Jun 21 Honnō-ji Incident: assassination of Oda Nobunaga by his own general Akechi Mitsuhide in Kyoto, Japan
- Jul 2 Battle of Yamazaki: Toyotomi Hideyoshi defeats Akechi Mitsuhide
- Jul 22 Willem of Orange moves from Antwerp to Delft
James I and VI
- Aug 23 Francis of Valois, Duke of Anjou pays tribute to earl of Flanders
- Oct 4 Last Julian calendar day in Spain, Portugal and pontifical states. To sync to the Gregorian calendar, 10 days are skipped and the next date is Oct 15.
- Oct 15 Gregorian calendar introduced in Spain, Portugal and pontifical states, after skipping 10 days after Oct 4 to sync the calendar
- Dec 10 France begins use of Gregorian calendar
- Dec 14 Zealand, Brabant Netherlands adopt Gregorian calendar, tomorrow is 12/25
- Dec 15 Leidse university names Rembert Dodoens professor of botany and medicine
- Dec 15 Spanish Netherlands, Denmark and Norway adopt the Gregorian calendar
- Dec 21 Flanders adopts Gregorian calendar, tomorrow is Jan 1 1583
- Dec 25 Zealand and Brabant adopts Gregorian calendar, yesterday was Dec 14th