Frankfurt is 4 hours ahead of Brasília
Best overlap: 8:00 AM to 2:00 PM in Brasília is 12:00 PM to 6:00 PM in Frankfurt.
8:00 AM to 2:00 PM in Brasília is when Frankfurt is also working, at 12:00 PM to 6:00 PM their time. Even with Frankfurt ahead by 4 hours, your workdays overlap by a comfortable 6 hours — plenty of flexibility for both sides. Watch the DST gap — when Frankfurt changes its clocks and Brasília stays the same, this window slides by an hour.