Best overlap: 8:00 AM to 9:00 AM in Brisbane is 5:00 PM to 6:00 PM in Ottawa.
The sweet spot is 8:00 AM to 9:00 AM Brisbane time, matching 5:00 PM to 6:00 PM in Ottawa. The overlap is tight at roughly 1 hour, so protect it: 8:00 AM in Brisbane / 5:00 PM in Ottawa is your safest recurring slot. Watch the date, too: while it's still the workday in Brisbane, Ottawa is already on the previous day. Watch the DST gap — when Ottawa changes its clocks and Brisbane stays the same, this window slides by an hour.
| 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 | ||||||||||||||||||||||||
Ottawa America/Toronto |
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. -