Time difference between London and Denver
Good time for both on a weekday: 16:00–17:00 in London = 9:00–10:00 in Denver.
- Everyone at work
- Work hours
- Awake
- Night
- Weekend
Tap any column to see that moment in every city.
Different hours for each city
- 7 hoursDenver behind London
- UTC / UTC+1London, January / July
- UTC−7 / UTC−6Denver, January / July
- 1 hourshared 9-to-5 time
How the gap moves through the year
Denver is 7 hours behind London for about 11 months of the year.
Denver is 6 hours behind London for about 4 weeks of the year.
From the second Sunday in March (when Denver moves forward), Denver is 6 hours behind London.
From the last Sunday in March (when London moves forward), Denver is 7 hours behind London.
From the last Sunday in October (when London falls back), Denver is 6 hours behind London.
From the first Sunday in November (when Denver falls back), Denver is 7 hours behind London.
London moves its clocks forward one hour on the last Sunday in March at 1:00 am local time and back on the last Sunday in October at 2:00 am, switching between Greenwich Mean Time (UTC) and British Summer Time (UTC+1).
Denver moves its clocks forward one hour on the second Sunday in March at 2:00 am local time and back on the first Sunday in November at 2:00 am, switching between Mountain Standard Time (UTC−7) and Mountain Daylight Time (UTC−6).
Next clock change for this pair, as of when this page was built (2026-10-20): London falls back on Sun 25 October 2026.
Everything on this page also holds if you swap London for Birmingham, Dublin, Glasgow, Manchester or Lisbon, or Denver for Salt Lake City — those cities follow exactly the same clock all year.
Working hours that overlap
In January, a 9-to-5 day in both cities shares 1 hour: 4:00 pm–5:00 pm in London, which is 9:00 am–10:00 am in Denver.
July gives exactly the same window.
Across the week
At 9:00 on a Monday morning in London, it is 2:00 am on Monday in Denver.
Daylight, distance and night calls
London and Denver are about 7,540 km (4,680 miles) apart and 105° of longitude apart, which by the sun alone would be 7 hours.
London's winter clock sits within 2 minutes of the sun, and Denver's sits within 2 minutes of the sun.
In mid-January the sun is up in London from about 7:59 am to 4:19 pm, and the sun is up in Denver from about 7:19 am to 4:58 pm; both cities are in daylight at the same time for about 2 hours.
In mid-July the sun is up in London from about 5:00 am to 9:12 pm, and the sun is up in Denver from about 5:44 am to 8:28 pm; both cities are in daylight at the same time for about 8 hours 30 minutes.
In January, 4 hours of a London office day fall in Denver's night (10 pm to 6 am), and 2 hours of a Denver office day fall in London's night.
In July, 4 hours of a London office day fall in Denver's night (10 pm to 6 am), and 2 hours of a Denver office day fall in London's night.
Hour-by-hour table and common mistakes — 2 more sections
| London | Denver, January | Denver, July |
|---|---|---|
| 12:00 am | 5:00 pm (−1 day) | 5:00 pm (−1 day) |
| 1:00 am | 6:00 pm (−1 day) | 6:00 pm (−1 day) |
| 2:00 am | 7:00 pm (−1 day) | 7:00 pm (−1 day) |
| 3:00 am | 8:00 pm (−1 day) | 8:00 pm (−1 day) |
| 4:00 am | 9:00 pm (−1 day) | 9:00 pm (−1 day) |
| 5:00 am | 10:00 pm (−1 day) | 10:00 pm (−1 day) |
| 6:00 am | 11:00 pm (−1 day) | 11:00 pm (−1 day) |
| 7:00 am | 12:00 am | 12:00 am |
| 8:00 am | 1:00 am | 1:00 am |
| 9:00 am | 2:00 am | 2:00 am |
| 10:00 am | 3:00 am | 3:00 am |
| 11:00 am | 4:00 am | 4:00 am |
| 12:00 pm | 5:00 am | 5:00 am |
| 1:00 pm | 6:00 am | 6:00 am |
| 2:00 pm | 7:00 am | 7:00 am |
| 3:00 pm | 8:00 am | 8:00 am |
| 4:00 pm | 9:00 am | 9:00 am |
| 5:00 pm | 10:00 am | 10:00 am |
| 6:00 pm | 11:00 am | 11:00 am |
| 7:00 pm | 12:00 pm | 12:00 pm |
| 8:00 pm | 1:00 pm | 1:00 pm |
| 9:00 pm | 2:00 pm | 2:00 pm |
| 10:00 pm | 3:00 pm | 3:00 pm |
| 11:00 pm | 4:00 pm | 4:00 pm |
Common mistakes with London and Denver
- Assuming the gap is fixed. Both cities change their clocks, but not on the same weekend, so a recurring meeting can land an hour off for a few weeks.
- Writing “GMT” all year for London. In summer the zone is British Summer Time; calendar apps handle it, but a typed time in an email can be read the wrong way.
Questions
- Is Denver ahead of London?
- Denver is 7 hours behind London for most of the year.
- What is a good time for a meeting between London and Denver?
- With 9-to-5 days in both cities, 4:00 pm–5:00 pm London time is inside working hours in both, which gives 1 hour. The window can shift by an hour in the weeks when only one city has changed its clocks.
- Does the time difference between London and Denver change?
- Yes. Denver is 7 hours behind London for about 11 months of the year. Denver is 6 hours behind London for about 4 weeks of the year.
Related time differences
- New York and LondonLondon ahead by 5 hours · 3 hours of shared office time
- London and Los AngelesLos Angeles behind by 8 hours · no shared office hours
- London and SydneySydney ahead by 9–11 hours · no shared office hours
- London and DubaiDubai ahead by 3–4 hours · 5 hours of shared office time
- London and BrisbaneBrisbane ahead by 9–10 hours · no shared office hours
- London and SingaporeSingapore ahead by 7–8 hours · 1 hour of shared office time
- London and VancouverVancouver behind by 8 hours · no shared office hours
- London and ChicagoChicago behind by 6 hours · 2 hours of shared office time
- London and AmsterdamAmsterdam ahead by 1 hour · 7 hours of shared office time
- London and TokyoTokyo ahead by 8–9 hours · no shared office hours
London time zone · Denver time zone · Plan with more cities
City names, coordinates and time zone assignments: GeoNames, licensed under CC BY 4.0 (selection and renaming of some cities by this site). Clock times are computed in your browser from the IANA time zone database. Sources and limits.