Calgary is 4 hours behind Brasília
Best overlap: 12:00 PM to 6:00 PM in Brasília is 8:00 AM to 2:00 PM in Calgary.
Brasília and Calgary overlap from 12:00 PM to 6:00 PM (Brasília) to the equivalent 8:00 AM to 2:00 PM in Calgary — that's your meeting window. You won't be short on options — 6 hours of overlap leaves space for recurring syncs and ad-hoc calls alike. Note the seasonal wrinkle: when Calgary is on daylight saving and Brasília isn't, the gap between them grows or shrinks by an hour.