São Paulo is 7 hours ahead of Honolulu
Best overlap: 8:00 AM to 11:00 AM in Honolulu is 3:00 PM to 6:00 PM in São Paulo.
Keep meetings inside 8:00 AM to 11:00 AM in Honolulu — that maps to 3:00 PM to 6:00 PM in São Paulo. You share roughly 3 hours a day. That's enough for regular meetings, but treat the window as prime time and guard it.