Best overlap: 4:00 PM to 6:00 PM in Brisbane is 8:00 AM to 10:00 AM in Frankfurt.
For the smoothest call, aim inside 4:00 PM to 6:00 PM in Brisbane, i.e. 8:00 AM to 10:00 AM in Frankfurt. The overlap barely stretches to 2 hours, so reserve it for what really needs a live conversation and handle the rest async. Note that Frankfurt follows daylight saving while Brisbane stays put, so the times above drift by an hour seasonally.
| Local time | 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Brisbane Australia/Brisbane | ||||||||||||||||||||||||
Frankfurt Europe/Berlin |
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. -