Best overlap: 3:00 PM to 6:00 PM in Perth is 8:00 AM to 11:00 AM in Hamburg.
Schedule calls for 3:00 PM to 6:00 PM in Perth — your colleagues in Hamburg will be online from 8:00 AM to 11:00 AM. Hamburg is 7 hours behind Perth, leaving about 3 hours of daily overlap — enough for most meetings if you don't leave them too late in the day. These times hold for most of the year, but Hamburg's daylight saving (which Perth doesn't use) shifts them by an hour twice annually.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Perth Australia/Perth | ||||||||||||||||||||||||
Hamburg 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. -