HSL GTFS feed contains static public transport schedules and other related data such as stop locations. The feed is updated daily and will include data for three months onwards. Latest GTFS feed is available from https://infopalvelut.storage.hsldev.com/gtfs/hsl.zip. See Google's documentation for more details on GTFS format.
HSL GTFS feed is available under CC BY 4.0 license.