São Paulo is 5 hours behind Budapest
Best overlap: 1:00 PM to 6:00 PM in Budapest is 8:00 AM to 1:00 PM in São Paulo.
If you set up a recurring sync, 1:00 PM to 6:00 PM in Budapest (8:00 AM to 1:00 PM in São Paulo) is the natural home for it. Around 5 hours of overlap is enough to work comfortably, as long as meetings don't drift to the end of one team's day. Because Budapest and São Paulo don't both observe daylight saving, plan to re-check the overlap around March and November.