TIME ZONE CONVERTER
London to San Diego
Time Converter
Convert London, United Kingdom to San Diego, United States. Compare dates, seasonal differences and meeting hours.
London is 7h or 8h ahead of San Diego in 2026, depending on the date.
9 AM London = 1 AM San Diego
Selected date: November 10, 2026.
THE QUICK REFERENCE
CSVLondon to San Diego conversion table
November 10, 2026 · Date changes are marked.
View the full 24-hour table
| London | San Diego |
|---|---|
| 12:00 AM | 4:00 PM -1 day |
| 1:00 AM | 5:00 PM -1 day |
| 2:00 AM | 6:00 PM -1 day |
| 3:00 AM | 7:00 PM -1 day |
| 4:00 AM | 8:00 PM -1 day |
| 5:00 AM | 9:00 PM -1 day |
| 6:00 AM | 10:00 PM -1 day |
| 7:00 AM | 11:00 PM -1 day |
| 8:00 AM | 12:00 AM |
| 9:00 AM | 1:00 AM |
| 10:00 AM | 2:00 AM |
| 11:00 AM | 3:00 AM |
| London | San Diego |
|---|---|
| 12:00 PM | 4:00 AM |
| 1:00 PM | 5:00 AM |
| 2:00 PM | 6:00 AM |
| 3:00 PM | 7:00 AM |
| 4:00 PM | 8:00 AM |
| 5:00 PM | 9:00 AM |
| 6:00 PM | 10:00 AM |
| 7:00 PM | 11:00 AM |
| 8:00 PM | 12:00 PM |
| 9:00 PM | 1:00 PM |
| 10:00 PM | 2:00 PM |
| 11:00 PM | 3:00 PM |
Starting with the San Diego working day
These examples start on 2026-11-10 in San Diego.
09:00 San Diego17:00 →London · 2026-11-10
17:00 San Diego01:00 →London · 2026-11-11
ONE CLOCK TIME. THE WHOLE YEAR.
Year CSV09:00 London to San Diego throughout 2026
Keeping 09:00 on the London clock produces 2 different destination clock/date answers in 2026. The ranges below use London calendar dates, including transition days.
| Dates in London · 2026 | San Diego answer | Source → destination offsets | Explore |
|---|---|---|---|
| Jan 1 – Mar 867 dates | 01:00Same date | UTC → UTC−08:00 | |
| Mar 9 – Mar 2820 dates | 02:00Same date | UTC → UTC−07:00 | |
| Mar 29 – Oct 24210 dates | 01:00Same date | UTC+01:00 → UTC−07:00 | |
| Oct 25 – Oct 317 dates | 02:00Same date | UTC → UTC−07:00 | |
| Nov 1 – Dec 3161 dates | 01:00Same date | UTC → UTC−08:00 |
Every calendar date is included, not just workdays. Date ranges include both endpoints. Based on IANA 2026e; future rules may change.
DON’T LOSE A DAY
When does London time become a different date in San Diego?
Your complete source day: 2026-11-10. Each range shows which destination date to use.
London · 2026-11-1000:00–08:00UTC
San Diego · 2026-11-0916:00–24:00UTC−08:00 Previous day
London · 2026-11-1008:00–24:00UTC
San Diego · 2026-11-1000:00–16:00UTC−08:00 Same date
Range starts are included; ends are excluded. 24:00 means midnight at the end of that date. Repeated hours appear separately with their UTC offsets. The strip is proportional to elapsed time.
THE BIGGER PICTURE
2026A year of time differences.
How San Diego compares with London throughout 2026.
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
−8h
−7h
−8h
−7h
−8h
Both London and San Diego change their clocks in 2026. The chart shows whether those changes alter the difference.
See exact change periods
| From (UTC, inclusive) | Until (UTC, exclusive) | San Diego vs London |
|---|---|---|
| 1 Jan 2026, 00:00 UTC | 8 Mar 2026, 10:00 UTC | 8h behind |
| 8 Mar 2026, 10:00 UTC | 29 Mar 2026, 01:00 UTC | 7h behind |
| 29 Mar 2026, 01:00 UTC | 25 Oct 2026, 01:00 UTC | 8h behind |
| 25 Oct 2026, 01:00 UTC | 1 Nov 2026, 09:00 UTC | 7h behind |
| 1 Nov 2026, 09:00 UTC | 1 Jan 2027, 00:00 UTC | 8h behind |
CLOCK CHANGES
What changes at the next clock adjustment?
Exact periods outside the most common difference in 2026
The most frequent difference has San Diego 8h behind relative to London. Exceptions:
| From (UTC, inclusive) | Until (UTC, exclusive) | Compared with London |
|---|---|---|
| 8 Mar 2026, 10:00 UTC | 29 Mar 2026, 01:00 UTC | 7h behind |
| 25 Oct 2026, 01:00 UTC | 1 Nov 2026, 09:00 UTC | 7h behind |
PLAN BEYOND A SINGLE DAY
Daily CSVLondon–San Diego working hours through 2026
Every date calculated with your working windows. 261 selected London workdays; public holidays are not applied.
Least shared time0h
Most common0h
Most shared time1h
Days without a 60-min slot241 / 261
One fixed start time does not fit every working day.
241 selected host workdays cannot fit the complete meeting. Adjust working days, hours or duration above, or use different seasonal meeting times.
London: 09:00–17:00, Mon, Tue, Wed, Thu, Fri. San Diego: 09:00–17:00, Mon, Tue, Wed, Thu, Fri.
Calculation details and repeated hours
Overnight shifts belong to their start weekday. Host workday means the source calendar date. Repeated local times use the first occurrence.
TWO PLACES. ONE CONNECTION.
≈ 8,822 km apartAcross the map. Across the clock.
THE DETAILS THAT MATTER
London to San Diego: useful answers
Why is the London to San Diego difference sometimes 7 hours and sometimes 8 hours?
London is 7h or 8h ahead of San Diego in 2026, depending on the date. Both London and San Diego change their clocks in 2026. The chart shows whether those changes alter the difference.
Does the London–San Diego time difference change in 2026?
The published rules produce 5 periods with 2 different offsets in 2026. See the annual chart for the exact boundaries of each period.
Does this conversion change the calendar date?
09:00 in London on 2026-11-10 is 01:00 in San Diego on 2026-11-10. This selected time stays on the same date in both places. Other times can cross midnight.
Can London and San Diego meet during working hours?
Your selected working windows have no shared time on 2026-11-10. The planner shows alternatives and how many minutes fall outside each person's working hours. Try another date or adjust the windows.
Related time-zone meanings and conversions
Choose the question you need answered
Calculated with IANA 2026e. Working hours are your preferences; public holidays and calendar availability are not included. Our methodology