Denver and Phoenix are in the same time during winter (MST), and Denver is 1 hour ahead during summer (MDT). Denver uses Mountain Time (MST/MDT) while Phoenix uses Mountain Standard Time (MST, UTC-7) year-round. Arizona does not observe daylight saving time.
When it's 12:00 PM in Denver during winter, it's also 12:00 PM in Phoenix. During summer, when it's 12:00 PM in Denver, it's 11:00 AM in Phoenix.
Best calling time: 9:00 AM - 5:00 PM Denver time year-round. During winter, this matches Phoenix hours exactly. During summer, adjust by one hour if needed.
Denver and Phoenix are about 1.5 hours apart by plane. Both are popular destinations for outdoor recreation, with Denver known for skiing and Phoenix for desert activities.