Finnish Game Jam 2015 is a game development event run in connection to Global Game Jam.
FGJ15 takes place in several places simultaneously. All of the sites will be updated under their own Locations page when the event gets closer.
More info about Global Game Jam and Finnish Game Jam can be found on the sub page.
Participating in the event is free but requires registration. FGJ has their own registration system which will open in December. Note that signing up on Global Game Jam page is not enough.