Best overlap: 8:45 AM to 1:45 PM in Kathmandu is 1:00 PM to 6:00 PM in Brisbane.
Shoot for 8:45 AM to 1:45 PM in Kathmandu; your Brisbane colleagues will see that as 1:00 PM to 6:00 PM. Brisbane is 4.25 hours ahead of Kathmandu, so you've got a workable 5-hour overlap — ideal for a standing meeting around 8:45 AM in Kathmandu (1:00 PM in Brisbane).
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. -