There is no time difference between Helsinki and Tallinn. Both cities use Eastern European Time (EET/EEST, UTC+2/+3). When it's 12:00 PM in Helsinki, it's also 12:00 PM in Tallinn.
Both cities observe daylight saving time on the same schedule, so they remain synchronized year-round.
Any time works! Since both cities share the same timezone, you can schedule calls during standard business hours (9:00 AM - 6:00 PM) without any time conversion needed.
Helsinki and Tallinn are twin cities across the Gulf of Finland, just 80 km apart. A ferry connects them in about 2 hours. Both are tech hubs with strong startup scenes and share cultural ties.