Hyderabad is 3.5 hours ahead of Bucharest
Best overlap: 8:30 AM to 2:30 PM in Bucharest is 12:00 PM to 6:00 PM in Hyderabad.
If you set up a recurring sync, 8:30 AM to 2:30 PM in Bucharest (12:00 PM to 6:00 PM in Hyderabad) is the natural home for it. With 6 hours of daily overlap, these two cities are an easy pairing; almost any reasonable hour works. Because Bucharest and Hyderabad don't both observe daylight saving, plan to re-check the overlap around March and November.