Finland's main official centenary celebrations are in Helsinki and Kuopio.
- Yle News (Image)
- A bus plunges off a bridge onto a train track due to a malfunction near Kuopio, Finland, killing four people and injuring 20 others.
- The military chiefs of both countries, Joseph Dunford and Valery Gerasimov, meet in Finland.
- Finland says compensation payouts for wrongful convictions and imprisonments have quadrupled in ten years, with three million euros paid in 2017 versus 720,000 euros in 2007.
- Abderrahman Bouanane goes on trial in a courtroom set up within a prison in Turku, Finland, accused of two murders and eight attempted murders in an alleged terror attack. The charges, the first terrorism crimes ever charged in Finland, relate to a stabbing in Turku's main market square. Bouanane is charged with two counts of terror-related murder and eight counts of attempted murder with a terror-related motive.
- The Finnish government decides not to expand a small two-year trial of universal basic income.