Adelaide is 8.5 hours ahead of Lagos
Best overlap: 8:00 AM to 10:00 AM in Lagos is 4:30 PM to 6:30 PM in Adelaide.
If you set up a recurring sync, 8:00 AM to 10:00 AM in Lagos (4:30 PM to 6:30 PM in Adelaide) is the natural home for it. Since Adelaide is 8.5 hours ahead of Lagos, the overlap is narrow (about 2 hours); a single, well-protected slot beats hunting for time each week. Because Adelaide and Lagos don't both observe daylight saving, plan to re-check the overlap around March and November.