17:57 5:57 PM
Mountain Daylight Time · UTC-6
🇺🇸 Boulder, CO, United States · Sunset
Time in Boulder, CO
04
- MDT
- UTC-6
- America/Denver
Your location
- Sunrise
- 07:18
- Sunset
- 18:18
- Daylight
- 11 h 1 min
The day in Boulder, CO, hour by hour
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Boulder, CO 17:57 5:57 PM You –:–
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Working hours
🇺🇸 Boulder, CO
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
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Time in Boulder, CO, in detail
- Time zone MDT Mountain Daylight Time
- UTC offset UTC-6 IANA zone America/Denver
- Daylight saving On summer time Clocks go back to UTC-7 on November 1, 2026 at 01:00 .
- Sunrise 07:18 Solar noon at 12:48
- Sunset 18:18 11 h 1 min of daylight
- People on this clock 106,803 United States
- Coordinates 39.98°, -105.57° Sunrise and sunset are calculated from this position.
Time in Boulder, CO: common questions
What time zone is Boulder, CO, in?
Boulder uses Mountain Daylight Time, IANA time zone America/Denver. The current offset is UTC−6.
What is the UTC offset of Boulder, CO?
Standard time in Boulder is UTC−7; during summer time it is UTC−6. The offset right now is UTC−6.
Does Boulder, CO, observe daylight saving time?
Yes. On November 1, 2026, clocks go back to standard time, and the offset becomes UTC−7.
What time are sunrise and sunset in Boulder, CO?
Sunrise in Boulder is at 7:16 AM and sunset at 6:17 PM on October 19, which gives 11 hours and 1 minute of daylight.
Which countries and territories share the time zone of Boulder, CO?
Right now the clocks show the same time (UTC−6) in Mexico, in Guatemala, in Honduras, in Nicaragua, in El Salvador, in Costa Rica, and in Belize.
What is the time difference between Boulder, CO, and Lisbon, Chiang Mai, or Ubud?
Compared with Boulder, Lisbon is 7 hours ahead, Chiang Mai is 13 hours ahead, and Ubud is 14 hours ahead.
