Gregory Conquers Julius Caesar
Feb 24 Pope Gregory XIII announces the New Style calendar, commonly known as the Gregorian calendar
William of Orange Injured
Mar 18 Prince William I of Orange injured in attack at Antwerp
Honnō-ji Incident
Jun 21 Honnō-ji Incident: assassination of Oda Nobunaga by his own general Akechi Mitsuhide in Kyoto, Japan
Battle of Yamazaki
Jul 2 Battle of Yamazaki: Toyotomi Hideyoshi defeats Akechi Mitsuhide
- Jul 22 William I of Orange moves from Antwerp to Delft
- 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 from October 4 to sync the calendar to the solar year and compensate for the drift that had occurred due to the Julian calendar having too many leap days
- 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 the Gregorian calendar, skipping 11 days making the next day Jan 1, 1583
- Dec 25 Zealand and Brabant adopts Gregorian calendar, yesterday was Dec 14th
Gregory I
Gregory XIII
Julius II
Julius III
Leo X
Pius V