Brasília is 4 hours behind Geneva
Best overlap: 12:00 PM to 6:00 PM in Geneva is 8:00 AM to 2:00 PM in Brasília.
Target 12:00 PM to 6:00 PM in Geneva, which lands at 8:00 AM to 2:00 PM for the Brasília side. This is one of the easier pairings: 6 hours of shared time means flexible, low-stress scheduling. Daylight saving complicates things slightly: Geneva observes it, Brasília doesn't, so the difference flexes by an hour part of the year.