Boulder, CO to Santiago: time difference
Santiago is 3 h ahead of Boulder, CO. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Boulder, CO 11:53 11:53 AM Santiago 14:53 2:53 PM You –:–
11:53 11:53 AM
Mountain Daylight Time · UTC-6
☀️ 07:19 · 🌙 18:17
14:53 2:53 PM
Chile Summer Time · UTC-3
☀️ 06:56 · 🌙 20:00
·
+3 h
Santiago is 3 h ahead of Boulder, CO.
When you, Boulder, CO and Santiago are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
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
🇨🇱 Santiago
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 0 12 AM 1 1 AM 2 2 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇺🇸 Boulder, CO | 🇨🇱 Santiago |
|---|---|---|
| Local time | 11:53 | 14:53 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Mountain Daylight Time | Chile Summer Time |
| UTC offset | UTC-6 | UTC-3 |
| Offset from Boulder, CO | — | +3 h |
| IANA zone | America/Denver | America/Santiago |
| Daylight saving | On summer time → UTC-7, Nov 1, 01:00 | On summer time → UTC-4, Apr 3, 23:00 |
| Sunrise | 07:19 | 06:56 |
| Sunset | 18:17 | 20:00 |
| Daylight | 10 h 58 min | 13 h 4 min |
| People on this clock | 106,803 | 6,139,087 |
Compare Boulder, CO with another city
More comparisons with Boulder, CO: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Boulder, CO and Santiago: common questions
How many hours ahead of Boulder, CO, is Santiago?
The clocks in Santiago are 3 hours ahead of those in Boulder (UTC−3 and UTC−6).
What time is it in Santiago at the start of the working day in Boulder, CO?
The working day in Boulder starts at 9:00 AM; in Santiago it is 12:00 PM at that moment.
What time is it in Santiago at the end of the working day in Boulder, CO?
The working day in Boulder ends at 6:00 PM; in Santiago it is 9:00 PM at that moment.
Is there a time when both Boulder, CO, and Santiago are at work?
Yes: from 9:00 AM to 3:00 PM in Boulder (12:00 PM to 6:00 PM in Santiago), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Santiago compared with Boulder, CO?
The new day starts in Santiago earlier: at 9:00 PM in Boulder it is already midnight there. Until 3:00 AM in Santiago, Boulder is still on the previous day.
Does the time gap between Boulder, CO, and Santiago change during the year?
Yes, because the clocks in Boulder and in Santiago change on different dates. Next change: from November 1, 2026, Santiago will be 4 hours ahead of Boulder.
