🇪🇸 Barcelona, Spain
51
- Central European Summer Time
- UTC+2
- Golden hour
☀️ 08:09 · 🌙 19:05 · 10 h 56 min
Barcelona to Boulder, CO: time difference
Boulder, CO is 8 h behind Barcelona. 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.
Barcelona 18:03 6:03 PM Boulder, CO 10:03 10:03 AM You –:–
18:03 6:03 PM
Central European Summer Time · UTC+2
☀️ 08:09 · 🌙 19:05
10:03 10:03 AM
Mountain Daylight Time · UTC-6
☀️ 07:19 · 🌙 18:17
·
−8 h
Boulder, CO is 8 h behind Barcelona.
When you, Barcelona 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
🇪🇸 Barcelona
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
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 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇪🇸 Barcelona | 🇺🇸 Boulder, CO |
|---|---|---|
| Local time | 18:03 | 10:03 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Central European Summer Time | Mountain Daylight Time |
| UTC offset | UTC+2 | UTC-6 |
| Offset from Barcelona | — | −8 h |
| IANA zone | Europe/Madrid | America/Denver |
| Daylight saving | On summer time → UTC+1, Oct 25, 02:00 | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 08:09 | 07:19 |
| Sunset | 19:05 | 18:17 |
| Daylight | 10 h 56 min | 10 h 58 min |
| People on this clock | 1,660,122 | 106,803 |
Compare Barcelona with another city
More comparisons with Barcelona: the time zones next to it and the far side of the clock.
Big time differences
Barcelona and Boulder, CO: common questions
How many hours behind Barcelona is Boulder, CO?
The clocks in Boulder are 8 hours behind those in Barcelona (UTC−6 and UTC+2).
What time is it in Boulder, CO, when it is 9:00 AM in Barcelona?
When it is 9:00 AM in Barcelona, it is 1:00 AM in Boulder.
What time is it in Boulder, CO, at the end of the working day in Barcelona?
The working day in Barcelona ends at 6:00 PM; in Boulder it is 10:00 AM at that moment.
Is there a time when both Barcelona and Boulder, CO, are at work?
Yes: from 5:00 PM to 6:00 PM in Barcelona (9:00 AM to 10:00 AM in Boulder), the working days (9:00 AM–6:00 PM) overlap.
Until what time in Barcelona is it still yesterday in Boulder, CO?
Before 8:00 AM in Barcelona, the date in Boulder has not changed yet. From 4:00 PM in Boulder, it is already the next day in Barcelona.
Does the time difference between Barcelona and Boulder, CO, change?
Yes. Both places change their clocks, but on different dates. From October 25, 2026, Boulder will be 7 hours behind Barcelona.
