Best overlap: 1:00 PM to 6:00 PM in Anchorage is 8:00 AM to 1:00 PM in Brisbane.
Your window to reach both cities is 1:00 PM to 6:00 PM in Anchorage, which converts to 8:00 AM to 1:00 PM in Brisbane. The overlap sits at about 5 hours; aim for the heart of it so the call isn't too early for one team or too late for the other. Just remember Brisbane sits on the next day during this window, so double-check which calendar day you're booking. Note the seasonal wrinkle: when Anchorage is on daylight saving and Brisbane isn't, the gap between them grows or shrinks by an hour.
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. -