Adelaide is 8.5 hours ahead of Bucharest
Best overlap: 8:30 AM to 9:30 AM in Bucharest is 5:00 PM to 6:00 PM in Adelaide.
The best time to meet is 8:30 AM to 9:30 AM in Bucharest, which is 5:00 PM to 6:00 PM in Adelaide. The shared window is only 1 hour — treat 8:30 AM in Bucharest (5:00 PM in Adelaide) as the one fixed point and plan everything else around it.