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.
The Finland Swedish Heritage Day, inaugurated in 1908 by the Swedish People's Party of Finland, aimed to celebrate a day for Swedes. The intention was to boost the Swedish-speaking Finnish community. The king Gustavus Adolphus' death anniversary was chosen as the celebration date because it also signified Sweden's empire foundation.