Finns head to the polls to elect the 200 members of the parliament. Centre-right National Coalition Party wins the most votes at 20.7%, while the ruling Social Democratic Party places third with 19.9%.
The Finnish Parliament votes 184–7 to formally approve the country's accession to NATO, and to adopt the military alliance's founding documents. Hungary and Turkey have yet to approve Finland's membership.
Finland's leaders declare that the country should apply for membership of NATO "without delay," with the Parliament set to vote next week on whether to apply.
The Parliament of Finland holds a debate on whether or not to abandon the Euro as its currency following a petition that garnered enough signatures to force the issue into parliament. This comes as Finland as dealing with a weakening economy but the petition is unlikely to lead to the country leaving the Eurozone.
The President of Finland, Sauli Niinistö, in an address to the Finnish parliament (Eduskunta), says the current flow of migrants into Europe threatens the continent's Western values and that the UN's Convention relating to the Status of Refugees is outdated, saying "All estimates predict that the flow of people will increase this year. This is challenging the ability of Western democracies to help and also challenging the very structures underlying the idea of Europe".
The Parliament of Finland votes to allow same-sex marriage, marking the first time that a citizens' initiative has received lawmakers' blessing to be written into the legislation.
The launch of a flagship nuclear power station in Finland is delayed for a third time.