Hamburg is 4 hours ahead of São Paulo
Best overlap: 8:00 AM to 2:00 PM in São Paulo is 12:00 PM to 6:00 PM in Hamburg.
Keep meetings inside 8:00 AM to 2:00 PM in São Paulo — that maps to 12:00 PM to 6:00 PM in Hamburg. With 6 hours of daily overlap, these two cities are an easy pairing; almost any reasonable hour works. Keep an eye on the calendar — Hamburg observes daylight saving and São Paulo doesn't, which nudges this window by an hour twice a year.