Today is Mikael Agricola's day

Mikael Agricola (c. 1510 – 9 April 1557) was a clergyman who became the de facto founder of written Finnish and a prominent proponent of the Protestant Reformation in Sweden (including Finland). He is often called the "father of the Finnish written language". Agricola was consecrated as the bishop of Turku (Åbo) in 1554 without papal approval. As a result, he began a reform of the Finnish church (then a part of the Church of Sweden) along Lutheran lines. He translated the New Testament, the prayerbook, hymns, and the mass into Finnish, and through this work set the rules of orthography that are the basis of modern Finnish spelling. His thoroughgoing work is particularly remarkable in that he accomplished it in only three years. He died suddenly while returning from a trip during which he negotiated a treaty with the Russians.