What is the time difference between London and Honolulu?

Honolulu is 11 hours behind London. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.

When is the best time to call Honolulu from London?

There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.

Does London observe daylight saving time?

Yes. London runs on UTC+0 in winter and UTC+1 in summer. The next change is on 2026-10-25, when clocks go back by 60 minutes.

Does Honolulu observe daylight saving time?

No. Honolulu stays on UTC-10 all year, so its clocks never move.

If it is midday in London, what time is it in Honolulu?

It is 01:00 in Honolulu, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.

Which time zones do London and Honolulu use?

London uses Europe/London, currently UTC+1 (BST), and Honolulu uses Pacific/Honolulu, currently UTC-10 (HST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert London time to Honolulu time

Honolulu is 11 hours behind London right now, so midday in London lands in the small hours in Honolulu.

Convert a time

From

Date

Time

Converted time

—

The converter needs JavaScript to run. Everything below — offsets, daylight saving dates and the hour-by-hour table — is part of the page and works without it.

Hour by hour

The whole day mapped across: read down the left for London, across for Honolulu.

London	Honolulu
00:00	13:00previous day
01:00	14:00previous day
02:00	15:00previous day
03:00	16:00previous day
04:00	17:00previous day
05:00	18:00previous day
06:00	19:00previous day
07:00	20:00previous day
08:00	21:00previous day
09:00	22:00previous day
10:00	23:00previous day
11:00	00:00
12:00	01:00
13:00	02:00
14:00	03:00
15:00	04:00
16:00	05:00
17:00	06:00
18:00	07:00
19:00	08:00
20:00	09:00
21:00	10:00
22:00	11:00
23:00	12:00

Daylight saving time

London changes its clocks; Honolulu does not. The difference between them therefore shifts by an hour twice a year.

London

Observes daylight saving time

Standard: UTC+0
Daylight: UTC+1
Next change: 2026-10-25 −60m

Honolulu

Does not observe daylight saving time

Standard: UTC-10

When you can actually talk

A standard working day in London and one in Honolulu do not overlap at all. Any call between them is early for one side or late for the other.

London 01:00–05:00Honolulu 14:00–18:00
London 09:00–18:00Honolulu 22:00–07:00

Reference

The underlying data, in case you need to put it in a calendar invitation or a configuration file.

	London	Honolulu
IANA zone	Europe/London	Pacific/Honolulu
Abbreviation	BST	HST
Standard offset	UTC+0	UTC-10
Daylight offset	UTC+1	—
Clock changes this year	2	0
Country	United Kingdom	United States

Example, not the current time. Live times appear once the page loads.

Common questions

What is the time difference between London and Honolulu?: Honolulu is 11 hours behind London. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.
When is the best time to call Honolulu from London?: There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.
Does London observe daylight saving time?: Yes. London runs on UTC+0 in winter and UTC+1 in summer. The next change is on 2026-10-25, when clocks go back by 60 minutes.
Does Honolulu observe daylight saving time?: No. Honolulu stays on UTC-10 all year, so its clocks never move.
If it is midday in London, what time is it in Honolulu?: It is 01:00 in Honolulu, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.
Which time zones do London and Honolulu use?: London uses Europe/London, currently UTC+1 (BST), and Honolulu uses Pacific/Honolulu, currently UTC-10 (HST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.