Time in Colorado
The current local time and date in Colorado, its time zone, and a converter to your own time.
Detecting your time zone to suggest the best hour to call…
Colorado is the heart of the US Mountain zone — Denver, Colorado Springs and Boulder — switching between MST (UTC-7) and MDT (UTC-6).
Colorado uses UTC-7 in winter (standard time) and shifts to UTC-6 in summer when daylight saving time is active.
Compare to your time zone
Detecting your time zone…
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| Colorado | Your time |
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Compare Colorado with another city
Colorado & London · Colorado & New York · Colorado & Tokyo · Colorado & Los Angeles · Colorado & Dubai · All world clocks →
See also: Population of United States
Other cities in the Mountain & Pacific zones
Time in Los Angeles · Time in Seattle · Time in California · Time in Washington State · Time in Nevada · Time in Oregon · Time in Arizona · Time in Hawaii
Popular time comparisons
London → New York · London → Tokyo · New York → Tokyo · London → Sydney
FAQ
What time is it in Colorado right now?
Colorado is on UTC-7 in winter and UTC-6 during daylight saving time in summer, which is 7 hours behind UTC. So when it is 12:00 UTC, the local time in Colorado is 05:00 in winter and 06:00 in summer. The live clock at the top of this page applies that offset to the current moment and refreshes every second.
What time zone is Colorado in?
Colorado uses the America/Denver time zone, shown as MDT. Colorado uses UTC-7 in winter (standard time) and shifts to UTC-6 in summer when daylight saving time is active. The "compare to your time zone" section above converts any Colorado time into your own local time instantly.
Does Colorado observe daylight saving time?
Yes — Colorado does observe daylight saving time. Clocks move forward one hour in summer, taking Colorado from UTC-7 to UTC-6, and back again for winter. That means the difference between Colorado and any place holding a fixed offset changes by an hour for part of the year. This page reads the current offset from the America/Denver zone data every time it loads, so the clock, the converter and the call window above are correct for today's date without you tracking the changeover.
How do I convert Colorado time to my time zone?
Convert Colorado time by taking its UTC-7 offset and applying the difference to your own: subtract Colorado's offset from UTC to get the UTC time, then add your own offset. For example, 09:00 in Colorado is 16:00 UTC. The converter above does this automatically after detecting your device's time zone, and the World Clock meeting planner lays several cities out on one colour-coded 24-hour grid.
What is the dialing code for Colorado?
The dialing code for Colorado is +1. To call from abroad, dial +1 before the local number. The card at the top of this page shows it alongside the live local time so you can check it is a reasonable hour before you call.
What are the best hours to call Colorado?
Standard business hours in Colorado — 9:00 to 17:00 local time — correspond to 16:00 to 00:00 UTC while standard time is in effect, shifting one hour earlier in UTC terms during daylight saving. Convert that UTC window into your own zone to find the overlap. The "best time to call" line above does this for you, using waking hours of roughly 8am–9pm on both ends so neither side is called at night.
Learn how time zones work
UTC & GMT explained · Daylight saving explained · How to convert a time between two cities