Mikael Agricola Day is celebrated in Finland on April 9th in honor of a Finnish Lutheran clergyman Mikael Agricola. Since 1978, the day is also celebrated in Finland as the Day of Finnish Language, of which Agricola is known as the "father of literary Finnish"; Agricola created the written Finnish language by, among other things, writing the Abckiria (1543) and translating the New Testament.
