Casablanca is 8.5 hours behind Adelaide
Best overlap: 4:30 PM to 6:30 PM in Adelaide is 8:00 AM to 10:00 AM in Casablanca.
Your window to reach both cities is 4:30 PM to 6:30 PM in Adelaide, which converts to 8:00 AM to 10:00 AM in Casablanca. The shared window is only 2 hours — treat 4:30 PM in Adelaide (8:00 AM in Casablanca) as the one fixed point and plan everything else around it. Note the seasonal wrinkle: when Adelaide is on daylight saving and Casablanca isn't, the gap between them grows or shrinks by an hour.