Oslo is 5 hours ahead of São Paulo

Best overlap: 8:00 AM to 1:00 PM in São Paulo is 1:00 PM to 6:00 PM in Oslo.

The overlap falls at 8:00 AM to 1:00 PM in São Paulo, or 1:00 PM to 6:00 PM if you're in Oslo. Roughly 5 hours of common time means scheduling is manageable; just avoid the very edges of the window. Heads up: because Oslo changes its clocks and São Paulo doesn't, the difference moves by an hour twice a year. Confirm the overlap around the DST switch.