Best overlap: 3:00 PM to 6:00 PM in Perth is 8:00 AM to 11:00 AM in Geneva.
Shoot for 3:00 PM to 6:00 PM in Perth; your Geneva colleagues will see that as 8:00 AM to 11:00 AM. Geneva is 7 hours behind Perth, so the practical overlap is about 3 hours — generous enough for meetings, tight enough to be worth booking ahead. Don't be caught out by clock changes — Geneva observes daylight saving and Perth doesn't, so the offset varies by an hour through 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Perth Australia/Perth | ||||||||||||||||||||||||
Geneva Europe/Zurich |
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. -