Best overlap: 8:00 AM to 9:00 AM in Hamburg is 5:00 PM to 6:00 PM in Brisbane.
The hours that work for both Hamburg and Brisbane are 8:00 AM to 9:00 AM (Hamburg) and 5:00 PM to 6:00 PM (Brisbane). Brisbane is 9 hours ahead of Hamburg, which leaves a narrow 1-hour window. Treat 8:00 AM in Hamburg (5:00 PM in Brisbane) as the time and build around it. A quick caveat — Hamburg's clocks move for daylight saving and Brisbane's don't, so the times here are right for only part of the year.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Hamburg Europe/Berlin | ||||||||||||||||||||||||
Brisbane Australia/Brisbane |
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. -