Historical Events on March 31

25 significant historical events occurred on March 31. March 31 is linked to eight notable historical events including treaties, crimes, wars, and cultural milestones. On this date, the 1854 Convention of Kanagawa treaty was signed. Other events include the notorious 1922 Hinterkaifeck murders in Germany and a key development in the Chinese Civil War in 1946. Later cultural events on March 31 include the 53rd Academy Awards in 1981 and the first WrestleMania event in 1985.