Moscow is 1 hour ahead of Helsinki year-round. Helsinki uses Eastern European Time (EET, UTC+2) in winter and EEST (UTC+3) in summer. Moscow uses MSK (UTC+3) year-round.
When it's 12:00 PM in Helsinki, it's 1:00 PM in Moscow (during standard time).
Most hours work! With only a 1 hour difference, business hours overlap almost entirely.
Helsinki and Moscow are connected by a direct high-speed train (Allegro) that takes about 3.5 hours.