Denver and Salt Lake City are in the same time zone. Both cities use Mountain Time (MST/MDT). When it's noon in Denver, it's also noon in Salt Lake City.
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.
Denver and Salt Lake City are major Rocky Mountain cities. Direct flights take about 1.5 hours, connecting Colorado and Utah's largest cities.