January–March 1. January 12 – Parts of the Netherlands adopt the Gregorian calendar. 2. January 18 – The electorate of Brandenburg-Prussia becomes the Kingdom of Prussia, as Elector Frederick III is proclaimed King Frederick I. Prussia remains part of the Holy Roman Empire. It consists of Bran…
April–June 1. April 21 – In Japan, the young daimyō Asano Naganori is ordered to commit seppuku (ritual suicide). A group of 47 samuraiof his service begin planning to avenge his death. 2. May 23 – After being convicted of murdering William Moore, and for piracy, Captain William Kiddis hange…