Denver

United States • Mountain Time

Time Zone

Denver uses Mountain Time (MST / MDT), currently running at UTC−7 (winter) / UTC−6 (summer). Clocks spring forward one hour in mid-March and fall back in early November.

Business & Commerce

Denver, Colorado operates on Mountain Time (MT) — Mountain Standard Time (MST, UTC−7) in winter and Mountain Daylight Time (MDT, UTC−6) in summer. Mountain Time is the least populous of the four contiguous U.S. time zones, but Denver is its largest city and a significant regional commercial hub. At MST in winter, Denver is two hours behind New York, one hour behind Chicago, and one hour ahead of Los Angeles. The New York Stock Exchange and NASDAQ open at 7:30 AM Denver time, giving Denver-based investors an unusually early market morning relative to the West Coast. Denver is the financial and legal capital of the Mountain West, hosting regional offices for major energy, mining, and telecommunications companies. The Rocky Mountain time zone also covers key energy-producing states, making MST/MDT scheduling relevant to domestic U.S. oil and gas operations.