What is the time difference between Honolulu and London?

London is 11 hours ahead of Honolulu. 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 London from Honolulu?

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 Honolulu observe daylight saving time?

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

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.

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

It is 23:00 in London, 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 Honolulu and London use?

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

Convert Honolulu time to London time

Right now London runs 11 hours ahead of Honolulu. That gap is not fixed: it moves when either city changes its clocks.

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 Honolulu, across for London.

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

Daylight saving time

Honolulu keeps one offset all year while London moves twice. That is the whole reason this difference is seasonal.

Honolulu

Does not observe daylight saving time

Standard: UTC-10

London

Observes daylight saving time

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

When you can actually talk

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

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

Reference

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

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

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

Common questions

What is the time difference between Honolulu and London?: London is 11 hours ahead of Honolulu. 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 London from Honolulu?: 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 Honolulu observe daylight saving time?: No. Honolulu stays on UTC-10 all year, so its clocks never move.
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.
If it is midday in Honolulu, what time is it in London?: It is 23:00 in London, 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 Honolulu and London use?: Honolulu uses Pacific/Honolulu, currently UTC-10 (HST), and London uses Europe/London, currently UTC+1 (BST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.