Islamabad is 3 hours ahead of Bucharest
Best overlap: 8:00 AM to 3:00 PM in Bucharest is 11:00 AM to 6:00 PM in Islamabad.
If you set up a recurring sync, 8:00 AM to 3:00 PM in Bucharest (11:00 AM to 6:00 PM in Islamabad) is the natural home for it. With 7 hours of daily overlap, these two cities are an easy pairing; almost any reasonable hour works. Keep an eye on the calendar — Bucharest observes daylight saving and Islamabad doesn't, which nudges this window by an hour twice a year.