Bucharest is 1 hour ahead of Oslo
Best overlap: 8:00 AM to 5:00 PM in Oslo is 9:00 AM to 6:00 PM in Bucharest.
Both offices are open during 8:00 AM to 5:00 PM Oslo time, which is 9:00 AM to 6:00 PM in Bucharest. Bucharest is 1 hour ahead of Oslo, and with 9 hours of overlap you can even run back-to-back calls without stepping outside business hours.