1584

1584 (MDLXXXIV) was a leap year starting on Sunday in the Gregorian calendar and a leap year starting on Wednesday in the Julian calendar.

 Events 
 June 1 – With the death of the Duc d'Anjou, the Huguenot Henry of Navarre becomes heir-presumptive to the throne of France.
 July 5 – Maronite College established in Rome
 July 10 – William I of Orange assassinated
 Change to the new Gregorian Calendar in many countries. Dates between October 5 – 14 ignored.
 The first translation of the complete Bible into Slovenian language: Bibilija, tu je vse svetu pismu stariga inu noviga testamenta, slovenski tolmačena skuzi Jurija Dalmatina (Wittenberg), i.e. The Bible, it is a Complete Holy Scripture of the Old and of the New Testament, Translated into Slovenian by Jurij Dalmatin.
 Archangelsk is founded in northern Russia.
 Feodor I succeeds his father Ivan IV as Tsar of Russia
 Latin Book of Concord published in Germany
 Ghent falls to the Spanish.