Barcelona to Castle Rock, CO: time difference
Castle Rock, 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 21:00 9:00 PM Castle Rock, CO 13:00 1:00 PM You –:–
21:00 9:00 PM
Central European Summer Time · UTC+2
☀️ 07:58 · 🌙 19:20
13:00 1:00 PM
Mountain Daylight Time · UTC-6
☀️ 07:05 · 🌙 18:29
·
−8 h
Castle Rock, CO is 8 h behind Barcelona.
When you, Barcelona and Castle Rock, 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
🇺🇸 Castle Rock, 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 | 🇺🇸 Castle Rock, CO |
|---|---|---|
| Local time | 21:00 | 13:00 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 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 | 07:58 | 07:05 |
| Sunset | 19:20 | 18:29 |
| Daylight | 11 h 22 min | 11 h 25 min |
| People on this clock | 1,660,122 | 73,158 |
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 Castle Rock, CO: common questions
How many hours behind Barcelona is Castle Rock, CO?
The clocks in Castle Rock are 8 hours behind those in Barcelona (UTC−6 and UTC+2).
What time is it in Castle Rock, CO, at the start of the working day in Barcelona?
The working day in Barcelona starts at 9:00 AM; in Castle Rock it is 1:00 AM at that moment.
What time is it in Castle Rock, CO, at the end of the working day in Barcelona?
The working day in Barcelona ends at 6:00 PM; in Castle Rock it is 10:00 AM at that moment.
Is there a time when both Barcelona and Castle Rock, CO, are at work?
Yes: from 5:00 PM to 6:00 PM in Barcelona (9:00 AM to 10:00 AM in Castle Rock), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Castle Rock, CO, compared with Barcelona?
The new day starts in Castle Rock later: until 8:00 AM in Barcelona, it is still the previous day there. From 4:00 PM in Castle Rock, Barcelona is already on the next day.
Is the time difference between Barcelona and Castle Rock, 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 October 25, 2026, Castle Rock will be 7 hours behind Barcelona.
