What time is it in Denver, Colorado, United States

What time is it in Denver

Denver is the capital of Colorado, in the United States, on the high plains against the Front Range of the Rocky Mountains. It is nicknamed the Mile High City. It does not keep a capital hour, a mountain hour of its own, or a municipal stamp apart from the rest of the state. Official clocks follow Mountain Time: Mountain Standard Time in the colder months and Mountain Daylight Time once the United States springs forward. Computers usually store that pair as America/Denver. The label names a zone file, not a second Colorado hour.

Clocks here jump forward one hour on the second Sunday in March, at 02:00 MST toward 03:00 MDT, and back one hour on the first Sunday in November, at 02:00 MDT toward 01:00 MST. In 2026 that is Sunday 8 March and Sunday 1 November. The spring jump skips 02:00. The autumn jump repeats 01:00.

The live display is the minute that is still true. Shift a foreign hour through America/Denver, or through two displays that are both updating. Do not convert through a remembered gap from a trip when Denver was on standard time and the other city was already on summer time.

Mile-high city, Mountain Time that jumps

Colorado as a whole uses Mountain Time. A call toward Colorado Springs, Boulder, or Grand Junction needs no arithmetic. A call toward Phoenix does: most of Arizona stays on Mountain Standard Time all year and does not spring forward. In the warm months Denver is an hour ahead of Phoenix. In the standard months the two walls often match. Name the city. “Mountain Time” without a month is unfinished work if Arizona is in the thread.

Mountain Time is built on the 105°W meridian. Denver sits close to that line, so civil noon and solar noon stay nearer each other here than they do in a city far west of its zone meridian. That is still not a reason to invent a solar zone. Print the civil time. Check this city’s sunrise if the plan is outdoors. Altitude shapes how thin the air feels and how quickly a clear night cools. That is weather and geography. It is not a second belt.

Winter: MST, UTC-7. Summer: MDT, UTC-6. Computer name: America/Denver — Mountain Time, including this capital. Nearby exception: most of Arizona does not use daylight time; do not copy that rule onto Denver.

Sun and weather: computed for Denver, not pasted from the high peaks and not averaged across Colorado. Store a mixed call as America/Denver so only the other display shifts when the United States jumps. “Colorado time” is honest for the hour inside this state and still the wrong sunrise if you needed a different Front Range pin.

Thin air is altitude. The missing 02:00 in March is Congress. Do not blame the mountains for daylight saving.

Front Range sunrise and a dry-country sky

Sunrise and sunset on this page are calculated for Denver’s coordinates on the chosen date. They are not a Colorado proclamation. The city sits in the mid-latitudes, so winter afternoons shorten and summer evenings stretch. An 18:00 exit from an office is daylight in one month and night in another. That stretch of light sits on a clock that still jumps twice a year. Reload the date on this page. Do not tape a June sunrise to a December boarding pass.

The listed rising is the geometric instant the sun’s upper limb meets a flat horizon. The Front Range can delay first light on a west-facing street while the plains already see the disk. Towers, snow, and a summer thunderstorm can hide the disk after that instant. If you needed a red edge you can see, look outside.

Denver’s year is a high, relatively dry inland year: a real winter with snow, a warm summer, and weather that can change in an afternoon. A dark lunch hour under a storm cell is still lunch on Mountain Time. The weather line is this city’s present sky, not a peak copy and not a reason to write “about evening” on an invite.

For mixed readers, write “09:00 Denver (MDT)” or “09:00 Denver (MST)” according to the season, or write America/Denver and let the calendar choose. Add the season or the IANA name if Arizona is on the same thread.