San Diego is 17 hours behind Melbourne
Best overlap: 8:00 AM to 11:00 AM in Melbourne is 3:00 PM to 6:00 PM in San Diego.
Melbourne and San Diego overlap from 8:00 AM to 11:00 AM (Melbourne) to the equivalent 3:00 PM to 6:00 PM in San Diego — that's your meeting window. San Diego is 17 hours behind Melbourne, leaving about 3 hours of shared hours — plan recurring calls early in that window to leave buffer. Note the day shift — San Diego is on the previous day relative to Melbourne while this overlap is open.