Medellin to Boulder, CO: time difference
Boulder, CO is 1 h behind Medellin. 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.
Medellin 08:18 8:18 AM Boulder, CO 07:18 7:18 AM You –:–
08:18 8:18 AM
Colombia Standard Time · UTC-5
☀️ 05:49 · 🌙 17:47
07:18 7:18 AM
Mountain Daylight Time · UTC-6
☀️ 07:19 · 🌙 18:17
·
−1 h
Boulder, CO is 1 h behind Medellin.
When you, Medellin 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
🇨🇴 Medellin
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
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 21 9 PM 22 10 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
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Time zones side by side
| Detail | 🇨🇴 Medellin | 🇺🇸 Boulder, CO |
|---|---|---|
| Local time | 08:18 | 07:18 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Colombia Standard Time | Mountain Daylight Time |
| UTC offset | UTC-5 | UTC-6 |
| Offset from Medellin | — | −1 h |
| IANA zone | America/Bogota | America/Denver |
| Daylight saving | Not observed | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 05:49 | 07:19 |
| Sunset | 17:47 | 18:17 |
| Daylight | 11 h 58 min | 10 h 58 min |
| People on this clock | 2,486,723 | 106,803 |
Compare Medellin with another city
More comparisons with Medellin: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Medellin and Boulder, CO: common questions
How far behind Medellin is Boulder, CO?
Boulder is 1 hour behind Medellin: UTC−6 against UTC−5.
What time is it in Boulder, CO, at the start of the working day in Medellin?
The working day in Medellin starts at 9:00 AM; in Boulder it is 8:00 AM at that moment.
What time is it in Boulder, CO, at the end of the working day in Medellin?
The working day in Medellin ends at 6:00 PM; in Boulder it is 5:00 PM at that moment.
Is there a time when both Medellin and Boulder, CO, are at work?
Yes: from 10:00 AM to 6:00 PM in Medellin (9:00 AM to 5:00 PM in Boulder), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Boulder, CO, compared with Medellin?
The new day starts in Boulder later: until 1:00 AM in Medellin, it is still the previous day there. From 11:00 PM in Boulder, Medellin is already on the next day.
Does the time difference between Medellin and Boulder, CO, change?
Yes. The clocks change only in Boulder. From November 1, 2026, Boulder will be 2 hours behind Medellin.
