History of Finland
The history of Finland begins around 9,000 BC during the end of the last glacial period. Stone Age cultures were Kunda, Comb Ceramic, Corded Ware, Kiukainen, and Pöljä cultures. The Finnish Bronze Age started in approximately 1,500 BC and the Iron Age started in 500 BC and lasted until 1,300 AD. Finnish Iron Age cultures can be separated into Finnish proper, Tavastian, and Karelian cultures. The earliest written sources mentioning Finland start to appear from the 12th century onwards when the Catholic Church started to gain a foothold in Southwest Finland.
Finnish Swedish Heritage Day
The Finland Swedish Heritage Day was created in 1908, when the newly founded Swedish People's Party of Finland decided to celebrate a day for the Swedes. The intention was to strengthen the Swedish-speaking Finnish community. The reason why the day of the death of king Gustavus Adolphus was chosen was because this also was the time when the empire of Sweden was founded. In the beginning, the celebrations largely circled around the king's persona. During the language strife of the 1930s the celebrations were overshadowed by street fights between Finnish and Swedish groups. Finnish-speaking students saw this day as a day for celebrating "aggressive imperialism". During the Second World War, both sides stopped fighting each other and emphasized that both language groups were part of Finland, thus the celebration of the day spread outside the political spectrum. Today, the day is led by Swedish Assembly of Finland.