Istanbul and São Paulo Time Zone Comparison
The distance between Istanbul and São Paulo is felt not just in kilometers, but in time zones too. São Paulo is in South America, while Istanbul sits in the Middle East.
São Paulo is always 6 hours behind Istanbul, with no seasonal change, since neither city's daylight saving rules shift this relationship.
With a moderate gap like this, it's worth checking the suggested call window above before scheduling a meeting between Istanbul and São Paulo.