Current local time in BoulderColorado, United States
––:––
America/DenverUTC−7 / UTC−6
Boulder keeps Mountain Standard Time (MST, UTC−7) in winter and Mountain Daylight Time (MDT, UTC−6) in summer. Its IANA time zone is America/Denver.
Daylight saving time in Boulder
Boulder changes its clocks twice a year. The next changes, from the IANA time zone database as of October 2026:
- Sun, Nov 1, 2026: clocks go back 1 hour to UTC−7
- Sun, Mar 14, 2027: clocks go forward 1 hour to UTC−6
Cities on the same time as Boulder
These places show the same clock as Boulder every day of the coming year, clock changes included.
- In United States
- In other countries
Ciudad Juárez (Mexico)
Boulder time zone at a glance
- IANA time zone
- America/Denver
- UTC offset
- UTC−7 / UTC−6
- Daylight saving
- Observed
- Next clock change
- Sun, Nov 1, 2026 → UTC−7
- Country
- United States
- Region
- Colorado
- Coordinates
- 40.01°, -105.27°
- Population
- 106,803
- Local date
- —
Sunrise and sunset in Boulder today
Computed from Boulder's latitude and longitude for the current local date. Times shift by a minute or two either side depending on elevation and the horizon you actually see.
- Sunrise
- —
- Sunset
- —
- Solar noon
- —
- Day length
- —
- Civil dawn
- —
- Civil dusk
- —
- Golden hour ends
- —
- Golden hour begins
- —
Boulder time difference from major cities
| City | Local time now | Boulder is |
|---|---|---|
| New York CityUnited States | — | 2h behind |
| LondonUnited Kingdom | — | 7h behind |
| DubaiUnited Arab Emirates | — | 10h behind |
| SingaporeSingapore | — | 14h behind |
| TokyoJapan | — | 15h behind |
| SydneyAustralia | — | 17h behind |
Need a different pair? Compare any two cities or convert a specific time.
Boulder time: questions and answers
- What time is it in Boulder right now?
- The clock at the top of this page shows the live local time in Boulder, updated every second from your device's clock. Boulder keeps Mountain Standard Time (MST, UTC−7) in winter and Mountain Daylight Time (MDT, UTC−6) in summer.
- What time zone is Boulder in?
- Boulder is in the IANA time zone America/Denver: Mountain Standard Time (MST, UTC−7) in winter and Mountain Daylight Time (MDT, UTC−6) in summer.
- Does Boulder observe daylight saving time?
- Yes. Upcoming changes: Sun, Nov 1, 2026: clocks go back 1 hour to UTC−7; Sun, Mar 14, 2027: clocks go forward 1 hour to UTC−6.
- Which cities share Boulder's time?
- Denver, El Paso, Albuquerque, Colorado Springs, Aurora, Ciudad Juárez keep the same clock as Boulder all year.
Planning something with Boulder?
- Find a meeting time — the hours that overlap between Boulder and your team.
- Convert a time — turn a time in Boulder into yours, or the other way round.
- Compare office hours — when Boulder offices and yours are both open.
- Send a calendar invite — with the America/Denver time zone set correctly.
Other cities in United States
Denver, Albuquerque, El Paso, Oklahoma City, Phoenix, Tucson, Las Vegas, Fort Worth, Dallas, Austin