Best overlap: 5:00 PM to 6:00 PM in San Francisco is 8:00 AM to 9:00 AM in Perth.
The sweet spot is 5:00 PM to 6:00 PM San Francisco time, matching 8:00 AM to 9:00 AM in Perth. There's roughly 1 hour to share, so keep agendas lean and meet at 5:00 PM in San Francisco (8:00 AM in Perth) to use every minute. In this window San Francisco and Perth are on different dates, with Perth on the next day. Heads up: because San Francisco changes its clocks and Perth doesn't, the difference moves by an hour twice a year. Confirm the overlap around the DST switch.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
San Francisco America/Los Angeles | ||||||||||||||||||||||||
Perth Australia/Perth |
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. -
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