Best overlap: 3:00 PM to 6:00 PM in Brisbane is 8:30 AM to 11:30 AM in Tehran.
Brisbane and Tehran overlap from 3:00 PM to 6:00 PM (Brisbane) to the equivalent 8:30 AM to 11:30 AM in Tehran — that's your meeting window. Tehran is 6.5 hours behind Brisbane, leaving about 3 hours of shared hours — plan recurring calls early in that window to leave buffer.
| 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 | ||||||||||||||||||||||||
Tehran Asia/Tehran |
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. -