Doha is 6.5 hours behind Adelaide
Best overlap: 2:30 PM to 6:30 PM in Adelaide is 8:00 AM to 12:00 PM in Doha.
Keep meetings inside 2:30 PM to 6:30 PM in Adelaide — that maps to 8:00 AM to 12:00 PM in Doha. Doha is 6.5 hours behind Adelaide, which gives you a solid 4-hour window. Book earlier in it and neither side is rushing. Keep an eye on the calendar — Adelaide observes daylight saving and Doha doesn't, which nudges this window by an hour twice a year.