There is no time difference between São Paulo and Buenos Aires. Both cities use UTC-3 year-round. São Paulo uses Brasília Time (BRT) while Buenos Aires uses Argentina Time (ART). When it's 12:00 PM in São Paulo, it's also 12:00 PM in Buenos Aires.
Neither Brazil nor Argentina currently observes daylight saving time, so they remain synchronized year-round.
Any time works! Since both cities share the same timezone, you can schedule calls during standard business hours (9:00 AM - 5:00 PM) without any time conversion needed.
São Paulo and Buenos Aires are South America's two largest cities and economic centers. Brazil and Argentina have the largest economies in the region with significant trade relationships. Direct flights connect them in about 2.5 hours.