Time Difference Between Castle Rock and London
London is 7 hours ahead Castle Rock.
United States
Castle Rock
America/Denver · UTC-6
United Kingdom
London
Europe/London · UTC+1
Best Times to Meet
Hours where standard working time (9 AM – 6 PM) overlaps in both Castle Rock and London.
Castle Rock
9:00 AM
London
4:00 PM
Castle Rock
10:00 AM
London
5:00 PM
Castle Rock to London — 24-Hour Conversion
Each row shows the equivalent local time in London for an hour in Castle Rock. Working-hours rows (9–18) are highlighted.
| Castle Rock | London | Match |
|---|---|---|
| Off hours | ||
| Off hours | ||
| Workday in London | ||
| Workday in London | ||
| Workday in London | ||
| Workday in London | ||
| Workday in London | ||
| Workday in London | ||
| Workday in London | ||
| Best for meetings | ||
| Best for meetings | ||
| Workday in Castle Rock | ||
| Workday in Castle Rock | ||
| Workday in Castle Rock | ||
| Workday in Castle Rock | ||
| Workday in Castle Rock | ||
| Workday in Castle Rock | ||
| +1 day | Workday in Castle Rock | |
| +1 day | Off hours | |
| +1 day | Off hours | |
| +1 day | Off hours | |
| +1 day | Off hours | |
| +1 day | Off hours | |
| +1 day | Off hours |
Frequently Asked Questions
What is the time difference between Castle Rock and London?
London, United Kingdom (UTC+1) is 7 hours ahead Castle Rock, United States (UTC-6).
What is the best time to schedule a meeting between Castle Rock and London?
The best meeting times overlap when both cities are within standard working hours (9 AM – 6 PM). The full hour-by-hour table on this page lists every overlap window.
Does daylight saving time change the difference between Castle Rock and London?
Yes — when one city observes daylight saving time and the other does not, the gap shifts by an hour. The conversion table on this page reflects the current offset, including any active DST.
When it is 9 AM in Castle Rock, what time is it in London?
Use the conversion table on this page — every hour in Castle Rock is mapped to its equivalent local time in London, including day shift markers when the date differs.