Sweden Timeline By tkirkland Jan 18, 1000 Sweden is introduced to Christanity Period: Jan 18, 1000 to Jan 18, 1986 Sweden History Period: Jun 17, 1000 to Feb 28, 1986 Swden Timeline Apr 21, 1397 Sweden unites into one Mar 17, 1540 Lutherism becomes the offical languge of Sweden Aug 28, 1809 Sweden loses Finland to Russian Apr 4, 1867 450000 people move from Swenden to the usa Jan 18, 1975 Sweden forms a new consitusion Feb 28, 1986 Sweden prime minster gets killed