There is no time difference between Tallinn and Helsinki. Both cities use Eastern European Time (EET/EEST, UTC+2/+3). When it's 12:00 PM in Tallinn, it's also 12:00 PM in Helsinki.
Both cities observe daylight saving time on the same schedule as part of the European Union, 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.
Tallinn and Helsinki are twin capitals separated by only 80 km across the Gulf of Finland. A 2-hour ferry ride connects these cities, making day trips common. Helsinki is Finland's capital with 650,000 people, while Tallinn is Estonia's capital with 450,000 people.