Brasília is 13.5 hours behind Adelaide
There is no standard 8-to-6 overlap. Someone joins early or late.
Adelaide and Brasília are too far apart in time (13.5 hours) for their workdays to line up during regular hours. For anything urgent, agree on an early-morning or late-night bridge hour in advance so nobody's caught off guard. Just remember Adelaide changes its clocks for daylight saving and Brasília doesn't, so confirm the overlap whenever the seasons turn.