Melbourne is 14 hours ahead of Brasília
There is no standard 8-to-6 overlap. Someone joins early or late.
Melbourne is 14 hours ahead of Brasília, so their typical working days don't line up at all. Plan on one side joining outside normal hours. A recurring slot that trades off between early mornings and late evenings usually works best. The window above shifts seasonally: Melbourne keeps daylight saving while Brasília ignores it.