Brasília is 4 hours behind Madrid
Best overlap: 12:00 PM to 6:00 PM in Madrid is 8:00 AM to 2:00 PM in Brasília.
The sweet spot is 12:00 PM to 6:00 PM Madrid time, matching 8:00 AM to 2:00 PM in Brasília. Even with Brasília behind by 4 hours, your workdays overlap by a comfortable 6 hours — plenty of flexibility for both sides. Heads up: because Madrid changes its clocks and Brasília doesn't, the difference moves by an hour twice a year. Confirm the overlap around the DST switch.