Edmonton and Calgary are in the same time zone. Both cities use Mountain Time (MST/MDT). When it's noon in Edmonton, it's also noon in Calgary.
Both cities observe daylight saving time, switching between MST (UTC-7) in winter and MDT (UTC-6) in summer.
Any time works! Since both cities are in the same time zone, scheduling calls is never a problem. Business hours are identical.
Edmonton and Calgary are Alberta's two largest cities, about 3 hours apart by car. Both are major centers for Canada's oil and gas industry.