São Paulo is 5 hours behind Prague
Best overlap: 1:00 PM to 6:00 PM in Prague is 8:00 AM to 1:00 PM in São Paulo.
For the smoothest call, aim inside 1:00 PM to 6:00 PM in Prague, i.e. 8:00 AM to 1:00 PM in São Paulo. São Paulo is 5 hours behind Prague, so the practical overlap is about 5 hours — generous enough for meetings, tight enough to be worth booking ahead. Seasonal note: Prague uses daylight saving and São Paulo doesn't, so double-check the times in your own months — they can move by an hour.