Best overlap: 8:00 AM to 11:00 AM in Brisbane is 3:00 PM to 6:00 PM in San Diego.
For the smoothest call, aim inside 8:00 AM to 11:00 AM in Brisbane, i.e. 3:00 PM to 6:00 PM in San Diego. San Diego is 17 hours behind Brisbane, so the practical overlap is about 3 hours — generous enough for meetings, tight enough to be worth booking ahead. Remember San Diego is a day apart — the previous day — so a late call for Brisbane could be the following morning there. Daylight saving complicates things slightly: San Diego observes it, Brisbane doesn't, so the difference flexes by an hour 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Brisbane Australia/Brisbane | ||||||||||||||||||||||||
San Diego America/Los Angeles |
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. -