Sao Paulo is 3 hours ahead of Chicago (CST) or 2 hours ahead (CDT). When it's 12:00 PM in Chicago, it's 3:00 PM in Sao Paulo. Brazil no longer observes DST.
Chicago uses CT (Central Time) while Sao Paulo uses BRT (Brasilia Time).
Optimal window: 8:00 AM - 4:00 PM Chicago time (11:00 AM - 7:00 PM Sao Paulo). Morning to early afternoon in Chicago aligns with business hours in Sao Paulo.
Chicago-based companies have significant operations in Sao Paulo's financial and manufacturing sectors.