Tallinn is 7 hours ahead of New York. Tallinn uses Eastern European Time (EET/EEST, UTC+2/+3) while New York uses Eastern Time (EST/EDT, UTC-5/-4). When it's 12:00 PM in Tallinn, it's 5:00 AM in New York.
Both cities observe daylight saving time, though they switch on different dates (EU vs US schedules), so the difference briefly changes to 6 hours during the transition weeks in spring and fall.
For business calls: Schedule between 4:00 PM - 9:00 PM Tallinn time (9:00 AM - 2:00 PM New York time) for optimal business hours overlap.
Tallinn is one of the most digitized capitals in the world, home to Skype and Wise (formerly TransferWise). Estonia's e-Residency program has attracted many American entrepreneurs. Direct flights connect the cities via European hubs.