Bucharest is 1 hour ahead of Barcelona
Best overlap: 8:00 AM to 5:00 PM in Barcelona is 9:00 AM to 6:00 PM in Bucharest.
The sweet spot is 8:00 AM to 5:00 PM Barcelona time, matching 9:00 AM to 6:00 PM in Bucharest. Bucharest is 1 hour ahead of Barcelona, and with 9 hours of overlap you can even run back-to-back calls without stepping outside business hours.