events
Assassination of the Swedish rebel (later national hero) Engelbrekt Engelbrektsson (27 April O.S.).
Related Wikipedia articles
Engelbrekt Engelbrektsson
Swedish nobleman and nationalist rebel leader (1390s – 1436)
Engelbrekt Engelbrektsson was a Swedish nobleman, rebel leader and military leader of German ancestry. He was the leader of the Engelbrekt rebellion in 1434 against Eric of Pomerania, king of the Kalmar Union.Source: Wikipedia (CC BY-SA)
Old Style and New Style dates
Changes in calendar conventions
Old Style (O.S.) and New Style (N.S.) indicate dating systems before and after a calendar change, respectively. Usually, they refer to the change from the Julian calendar to the Gregorian calendar as enacted in various European countries between 1582 and 1923.Source: Wikipedia (CC BY-SA)
May 4
Day of the year
May 4 is the 124th day of the year in the Gregorian calendar; 241 days remain until the end of the year.Source: Wikipedia (CC BY-SA)