Brasília is 4 hours ahead of Vancouver
Best overlap: 8:00 AM to 2:00 PM in Vancouver is 12:00 PM to 6:00 PM in Brasília.
The overlap falls at 8:00 AM to 2:00 PM in Vancouver, or 12:00 PM to 6:00 PM if you're in Brasília. Brasília is 4 hours ahead of Vancouver, and with 6 hours of overlap you can even run back-to-back calls without stepping outside business hours. Because only Vancouver changes its clocks, the overlap above isn't fixed; expect a one-hour shift when Vancouver enters or leaves daylight saving.