Time in Colorado, United States

Time in Boulder, Colorado now

5:00:00 AM

Tuesday, November 3, 2026

MST · UTC−7 Mountain Standard Time

Sunrise: 6:32 AM
Sunset: 4:56 PM
Day length: 10 h 24 min
Daylight saving: Changes Mar 14, 2027

Boulder time zone

Time zone

Mountain Standard Time (MST), UTC−7. IANA zone America/Denver.

Clock changes

Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−7 → UTC−6).

Daylight saving dates worldwide

Location

Boulder, Colorado, United States. Coordinates 40.02° N, 105.27° W; population about 106,803.

Sunrise and sunset in Boulder today

Dawn (civil): 6:04 AM
Sunrise: 6:32 AM
Solar noon: 11:44 AM
Sunset: 4:56 PM
Dusk (civil): 5:25 PM
Day length: 10 h 24 min
Night length: 13 h 36 min
Golden hour, morning: 6:15 AM – 7:10 AM
Golden hour, evening: 4:18 PM – 5:14 PM
Blue hour, morning: 6:04 AM – 6:15 AM
Blue hour, evening: 5:14 PM – 5:25 PM

Calculated for the city centre at sea level; accurate to about a minute. Golden hour is when the sun is between 4° below and 6° above the horizon; blue hour between 6° and 4° below. See the whole month or another date.

Boulder time compared with other cities

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City	Local time	Difference from Boulder
New York City, New York	7:00 AM	2 hours ahead of Boulder
Los Angeles, California	4:00 AM	1 hour behind Boulder
Chicago, Illinois	6:00 AM	1 hour ahead of Boulder
Phoenix, Arizona	5:00 AM	Same time as Boulder
Honolulu, Hawaii	2:00 AM	3 hours behind Boulder
Anchorage, Alaska	3:00 AM	2 hours behind Boulder
Toronto, Canada	7:00 AM	2 hours ahead of Boulder
Vancouver, Canada	5:00 AM	Same time as Boulder
Mexico City, Mexico	6:00 AM	1 hour ahead of Boulder
São Paulo, Brazil	9:00 AM	4 hours ahead of Boulder
Buenos Aires, Argentina	9:00 AM	4 hours ahead of Boulder
London, United Kingdom	12:00 PM	7 hours ahead of Boulder
Dublin, Ireland	12:00 PM	7 hours ahead of Boulder
Paris, France	1:00 PM	8 hours ahead of Boulder

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Questions about time in Boulder

What time zone is Boulder in?

Boulder uses Mountain Standard Time (MST, UTC−7) as standard time and Mountain Daylight Time (MDT, UTC−6) during daylight saving time. Its IANA time-zone identifier is America/Denver, which is what phones and computers use to set the local time.

Does Boulder observe daylight saving time?

Yes. Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−7 → UTC−6). The previous change was on Sunday, November 1, 2026.

How far is Boulder from UTC?

Boulder is 7 hours behind UTC on standard time and 6 hours behind UTC during daylight saving time.

What time is sunrise and sunset in Boulder today?

The table above shows today’s sunrise, sunset and day length for the city centre. As an example, on Tuesday, November 3, 2026 the sun rose at 6:32 AM and set at 4:56 PM, giving 10 h 24 min of daylight.

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