Reykjavik is 3 hours ahead of São Paulo
Best overlap: 8:00 AM to 3:00 PM in São Paulo is 11:00 AM to 6:00 PM in Reykjavik.
Plan around 8:00 AM to 3:00 PM in São Paulo, which is 11:00 AM to 6:00 PM in Reykjavik, to catch everyone during office hours. The overlap is wide at 7 hours, so you can protect mornings for deep work and still find plenty of meeting time.