Brasília is 8.5 hours behind Chennai
Best overlap: 5:00 PM to 6:00 PM in Chennai is 8:30 AM to 9:30 AM in Brasília.
If you set up a recurring sync, 5:00 PM to 6:00 PM in Chennai (8:30 AM to 9:30 AM in Brasília) is the natural home for it. With about 1 hour of common time, this pairing rewards planning — 5:00 PM in Chennai / 8:30 AM in Brasília is the slot to defend.