Ottawa is 2 hours behind Rio de Janeiro
Best overlap: 10:00 AM to 6:00 PM in Rio de Janeiro is 8:00 AM to 4:00 PM in Ottawa.
For a call that suits both sides, look at 10:00 AM to 6:00 PM in Rio de Janeiro / 8:00 AM to 4:00 PM in Ottawa. Ottawa is 2 hours behind Rio de Janeiro, but the generous 8-hour window means both teams can meet well within their normal day. Finally, Ottawa observes daylight saving and Rio de Janeiro doesn't, so this window shifts by an hour for part of the year — recheck it each spring and autumn.