Santiago to Boulder, CO: time difference
Boulder, CO is 3 h behind Santiago. 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.
Santiago 13:16 1:16 PM Boulder, CO 10:16 10:16 AM You –:–
13:16 1:16 PM
Chile Summer Time · UTC-3
☀️ 06:56 · 🌙 20:00
10:16 10:16 AM
Mountain Daylight Time · UTC-6
☀️ 07:19 · 🌙 18:17
·
−3 h
Boulder, CO is 3 h behind Santiago.
When you, Santiago and Boulder, CO are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇨🇱 Santiago
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
🇺🇸 Boulder, CO
21 9 PM 22 10 PM 23 11 PM 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇨🇱 Santiago | 🇺🇸 Boulder, CO |
|---|---|---|
| Local time | 13:16 | 10:16 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Chile Summer Time | Mountain Daylight Time |
| UTC offset | UTC-3 | UTC-6 |
| Offset from Santiago | — | −3 h |
| IANA zone | America/Santiago | America/Denver |
| Daylight saving | On summer time → UTC-4, Apr 3, 23:00 | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 06:56 | 07:19 |
| Sunset | 20:00 | 18:17 |
| Daylight | 13 h 4 min | 10 h 58 min |
| People on this clock | 6,139,087 | 106,803 |
Compare Santiago with another city
More comparisons with Santiago: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Santiago and Boulder, CO: common questions
How many hours behind Santiago is Boulder, CO?
The clocks in Boulder are 3 hours behind those in Santiago (UTC−6 and UTC−3).
If it is 9:00 AM in Santiago, what time is it in Boulder, CO?
At 9:00 AM in Santiago, clocks in Boulder show 6:00 AM.
What time is it in Boulder, CO, at the end of the working day in Santiago?
The working day in Santiago ends at 6:00 PM; in Boulder it is 3:00 PM at that moment.
Is there a time when both Santiago and Boulder, CO, are at work?
Yes: from 12:00 PM to 6:00 PM in Santiago (9:00 AM to 3:00 PM in Boulder), the working days (9:00 AM–6:00 PM) overlap.
When is it still the previous day in Boulder, CO?
Until 3:00 AM in Santiago it is still the previous day in Boulder. The other way round, from 9:00 PM in Boulder it is already the next day in Santiago.
Is the time difference between Santiago and Boulder, CO, the same all year?
No. Both places use summer time, but they switch on different dates, so for a while the gap changes. From November 1, 2026, Boulder will be 4 hours behind Santiago.
