Lagos 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 Lagos.
Shoot for 4:30 PM to 6:30 PM in Adelaide; your Lagos colleagues will see that as 8:00 AM to 10:00 AM. With only around 2 hours of shared time, be precise — book 4:30 PM in Adelaide (8:00 AM in Lagos) and you'll catch both teams. For part of the year the maths changes: Adelaide observes daylight saving, Lagos does not, shifting the overlap by an hour.