Riyadh is 7 hours behind Melbourne
Best overlap: 3:00 PM to 6:00 PM in Melbourne is 8:00 AM to 11:00 AM in Riyadh.
The overlap falls at 3:00 PM to 6:00 PM in Melbourne, or 8:00 AM to 11:00 AM if you're in Riyadh. You get roughly 3 hours of shared time, so aim for the middle of that window to keep the call comfortable for both teams. The window above shifts seasonally: Melbourne keeps daylight saving while Riyadh ignores it.