London time zone and office-hour overlap
When London, New York and Los Angeles are all at work.
London
New York
Los Angeles
- Everyone at work
- Work hours
- Awake
- Night
- Weekend
Tap any column to see that moment in every city.
Different hours for each city
- UTCGreenwich Mean Time, January
- UTC+1British Summer Time, July
- Europe/LondonIANA time zone name
- 7other listed cities on the same clock all year
Clock changes
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).
Next change, as of when this page was built (2026-10-20): back on Sun 25 October 2026, from UTC+1 to UTC.
Sun and clock
At 0.1° west, the sun is highest over London at about 12:01 pm on the winter clock — almost exactly noon, because the clock runs close to the sun.
In mid-January the sun rises at about 7:59 am and sets at about 4:19 pm — 8 hours 15 minutes of daylight.
In mid-July the sun rises at about 5:00 am and sets at about 9:12 pm — 16 hours 15 minutes of daylight.
On a January weekday, 22 of the listed cities share the whole 9-to-5 day with London, 207 share at least two hours and 46 share no office time at all; on a July weekday the counts are 23, 207 and 34. The furthest away on the clock in January is Auckland (New Zealand), 13 hours ahead.
Of the 268 cities in this planner, 69 are behind London in January, 22 show the same time and 176 are ahead of it.
Cities on the same clock
All year, London shows the same time as Birmingham, Dublin (Ireland), Glasgow, Manchester, Lisbon (Portugal), Edinburgh and Belfast.
Only in January (northern winter) it matches Abidjan (Ivory Coast), Bamako (Mali), Dakar (Senegal), Kumasi (Ghana), Ouagadougou (Burkina Faso), Lomé (Togo), Accra (Ghana), Conakry (Guinea) and 7 more — they change their clocks on different dates or not at all.
Only in July it matches Kinshasa (DR Congo), Lagos (Nigeria), Casablanca (Morocco), Luanda (Angola), Abuja (Nigeria), Algiers (Algeria), Brazzaville (Congo), Rabat (Morocco) and 8 more.
Office hours shared with 11 business cities
Counting a 9-to-5 day, Monday to Friday, in both cities: London shares two hours or more with New York, Chicago, Paris, Dubai, Mumbai and São Paulo, and no office time at all with Los Angeles, Tokyo, Sydney and Auckland.
| City | Gap, Jan / Jul | Shared, Jan / Jul | At 9 am |
|---|---|---|---|
| New York | −5 / −5 h | 3 / 3 h | 4:00 am |
| Los Angeles | −8 / −8 h | 0 / 0 h | 1:00 am |
| Chicago | −6 / −6 h | 2 / 2 h | 3:00 am |
| Paris | +1 / +1 h | 7 / 7 h | 10:00 am |
| Dubai | +4 / +3 h | 4 / 5 h | 1:00 pm |
| Mumbai | +5½ / +4½ h | 2½ / 3½ h | 2:30 pm |
| Singapore | +8 / +7 h | 0 / 1 h | 5:00 pm |
| Tokyo | +9 / +8 h | 0 / 0 h | 6:00 pm |
| Sydney | +11 / +9 h | 0 / 0 h | 8:00 pm |
| Auckland | +13 / +11 h | 0 / 0 h | 10:00 pm |
| São Paulo | −3 / −4 h | 5 / 4 h | 6:00 am |
Time differences with London
- 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 and CalgaryCalgary behind by 7 hours · 1 hour of shared office time
- London and DublinSame clock time · 8 hours of shared office time
- London and AdelaideAdelaide ahead by 8½–10½ hours · no shared office hours
- London and CairoCairo ahead by 2 hours · 6 hours of shared office time
- London and IstanbulIstanbul ahead by 2–3 hours · 6 hours of shared office time
- London and BangkokBangkok ahead by 6–7 hours · 2 hours of shared office time
- London and PhoenixPhoenix behind by 7–8 hours · 1 hour of shared office time
- London and AucklandAuckland ahead by 11–13 hours · no shared office hours
- London and DelhiDelhi ahead by 4½–5½ hours · 3 hours 30 minutes of shared office time
- London and DenverDenver behind by 7 hours · 1 hour of shared office time
- London and Mexico CityMexico City behind by 6–7 hours · 2 hours of shared office time
- London and LagosLagos ahead by 0–1 hours · 8 hours of shared office time
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.