Brasília is 2 hours ahead of Atlanta
Best overlap: 8:00 AM to 4:00 PM in Atlanta is 10:00 AM to 6:00 PM in Brasília.
The overlap falls at 8:00 AM to 4:00 PM in Atlanta, or 10:00 AM to 6:00 PM if you're in Brasília. Scheduling is forgiving here: with 8 hours of overlap, a missed slot just means picking another one the same day. Heads up: because Atlanta changes its clocks and Brasília doesn't, the difference moves by an hour twice a year. Confirm the overlap around the DST switch.