Best overlap: 8:00 AM to 9:00 AM in Perth is 5:00 PM to 6:00 PM in San Francisco.
The sweet spot is 8:00 AM to 9:00 AM Perth time, matching 5:00 PM to 6:00 PM in San Francisco. The overlap is tight at roughly 1 hour, so protect it: 8:00 AM in Perth / 5:00 PM in San Francisco is your safest recurring slot. In this window Perth and San Francisco are on different dates, with San Francisco on the previous day. Just remember San Francisco changes its clocks for daylight saving and Perth doesn't, so confirm the overlap whenever the seasons turn.
| 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 | ||||||||||||||||||||||||
San Francisco America/Los Angeles |
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