Time Difference: London vs Los Angeles

London (GMT+1) · Los Angeles (GMT-7)

London

GMT+1

--:--:--

Los Angeles

GMT-7

--:--:--

Los Angeles and London are in the same UTC offset

Time Difference

London Offset

GMT+1

Europe/London

Los Angeles Offset

GMT-7

America/Los_Angeles

Summary

London and Los Angeles share the same UTC offset

Business Hours Overlap (9 AM – 6 PM)

9 hours overlap during standard business hours in both cities.

London	Los Angeles	Overlap
9 AM	9 AM	Business hours
10 AM	10 AM	Business hours
11 AM	11 AM	Business hours
12 PM	12 PM	Business hours
1 PM	1 PM	Business hours
2 PM	2 PM	Business hours
3 PM	3 PM	Business hours
4 PM	4 PM	Business hours
5 PM	5 PM	Business hours
6 PM	6 PM	Outside

Did You Know? — London & Los Angeles

Time Zone Facts: London

•London sits on the Prime Meridian at 0° longitude, which is why Greenwich Mean Time (GMT/UTC+0) became the world's reference timezone in 1884 at the International Meridian Conference.
•The London Stock Exchange opens at 8:00 AM GMT and closes at 4:30 PM GMT, making London's morning the global overlap window where both European and (briefly) US pre-market traders are active.
•At 51.5°N — further north than most of Canada — London receives only about 7.5 hours of daylight at winter solstice but enjoys over 16.5 hours of daylight in midsummer.

Time Zone Facts: Los Angeles

•Los Angeles uses Pacific Time — PST (UTC-8) in winter and PDT (UTC-7) in summer — and is consistently 3 hours behind New York, making it the last major US financial timezone to open.
•The Hollywood entertainment industry and Silicon Valley tech sector both headquartered on the US West Coast have made LA and the Bay Area the informal standard for 'Pacific business hours' globally.
•At 34.1°N, Los Angeles has mild daylight variation: about 9.9 hours in December and 14.4 hours in June — much less seasonal swing than cities at higher latitudes.

Frequently Asked Questions

London and Los Angeles are in the same time zone offset, so there is no time difference between them.

There are 9 overlapping business hours (9 AM–6 PM) between London and Los Angeles. Scheduling during those hours ensures both parties are in their working day.

London and Los Angeles share the same UTC offset (GMT+1), so their workdays are completely synchronized — no conversion needed, identical real-time availability, and deadline alignment is automatic.

London observes GMT+1 (Europe/London). A standard 9:00 AM–6:00 PM workday in London maps to specific UTC hours — use UTC-anchored deadlines when coordinating with London-based teammates to avoid confusion from local clock changes.

Los Angeles observes GMT-7 (America/Los_Angeles). A standard 9:00 AM–6:00 PM workday in Los Angeles maps to specific UTC hours — use UTC-anchored deadlines when coordinating with Los Angeles-based teammates to avoid confusion from local clock changes.

If {cityA} and {cityB} follow different DST schedules — common in North America–Europe, Southern Hemisphere, or no-DST pairings — the time difference shifts by 1 hour during each transition. The 1–3 weeks between the two cities' clock-change dates create a 'gap window' that frequently catches teams off guard. The difference displayed here is always live and accounts for current DST status.

The best time to call Los Angeles from London is during the 9-hour business-hours overlap window, when both cities are within their standard working day (9 AM–6 PM).

When it is midnight (00:00) in London, it is 12 AM in Los Angeles.

No — London and Los Angeles share the same UTC offset, so they are always on the same calendar date.

London observes Europe/London (GMT+1). For async-first teams, the most reliable approach is anchoring shared deadlines in UTC rather than any local time, and defining each member's 'availability window' — typically 9:00 AM–6:00 PM Europe/London for London. This eliminates confusion when DST transitions shift local clocks seasonally.

Los Angeles observes America/Los_Angeles (GMT-7). For async-first teams, the most reliable approach is anchoring shared deadlines in UTC rather than any local time, and defining each member's 'availability window' — typically 9:00 AM–6:00 PM America/Los_Angeles for Los Angeles. This eliminates confusion when DST transitions shift local clocks seasonally.

Yes — with 9 hours of overlapping business hours, London and Los Angeles teams can hold real-time standups and synchronous collaboration daily during that window.