Best overlap: 8:00 AM to 10:00 AM in Bucharest is 4:00 PM to 6:00 PM in Brisbane.
Target 8:00 AM to 10:00 AM in Bucharest, which lands at 4:00 PM to 6:00 PM for the Brisbane side. Overlap is at a premium — roughly 2 hours — so claim 8:00 AM in Bucharest (4:00 PM in Brisbane) for recurring calls and keep them on time. Don't be caught out by clock changes — Bucharest observes daylight saving and Brisbane doesn't, so the offset varies by an hour through the year.
The US to Australia gap runs 14 to 19 hours depending on the month, and someone is always in tomorrow. Exact overlap windows for every US coast, the double-DST trap, and a rotation rule that keeps it fair. -