Hyderabad is 3.5 hours ahead of Madrid
Best overlap: 8:00 AM to 3:00 PM in Madrid is 11:30 AM to 6:30 PM in Hyderabad.
Keep meetings inside 8:00 AM to 3:00 PM in Madrid — that maps to 11:30 AM to 6:30 PM in Hyderabad. With 7 hours of daily overlap, these two cities are an easy pairing; almost any reasonable hour works. Remember that Madrid shifts for daylight saving and Hyderabad doesn't, so recalculate the overlap after each clock change.