Oh it's Christian.
Religions in Finland
Most Finns are Christians. The largest religious community in Finland is the Evangelical Lutheran Church of Finland (Suomen evankelis-luterilainen kirkko), to which about 78% of the population belongs. The Orthodox Church of Finland is the second largest religious community. Slightly over 1% of the population belongs to the Orthodox Church. The Evangelical Lutheran Church and the Orthodox Church enjoy special status in Finland. They are entitled to levy taxes, for example.
Tens of thousands of Muslims live in Finland. However, only a portion of them belong to Islamic communities.
Other religious communities in Finland include Jehovah’s Witnesses, the Evangelical Free Church of Finland, the Catholic Church in Finland, and the Seventh-day Adventist Church in Finland.