What is the time difference between London and Phoenix?

Phoenix is 8 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 Phoenix from London?

Between 17:00–18:00 in London, which is 09:00–10:00 in Phoenix. That is the only stretch where both cities are inside a 09:00–18:00 day.

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 Phoenix observe daylight saving time?

No. Phoenix stays on UTC-7 all year, so its clocks never move.

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

It is 04:00 in Phoenix, 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 Phoenix use?

London uses Europe/London, currently UTC+1 (BST), and Phoenix uses America/Phoenix, currently UTC-7 (MST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert London time to Phoenix time

Phoenix is 8 hours behind London right now, so midday in London lands in the small hours in Phoenix.

Convert a time

From

Date

Time

Converted time

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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 Phoenix.

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

Daylight saving time

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

London

Observes daylight saving time

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

Phoenix

Does not observe daylight saving time

Standard: UTC-7

When you can actually talk

The window is 1 hour wide — 17:00–18:00 in London, 09:00–10:00 in Phoenix.

London 17:00–18:00Phoenix 09:00–10:00

Reference

The zone identifiers and offsets behind everything above.

	London	Phoenix
IANA zone	Europe/London	America/Phoenix
Abbreviation	BST	MST
Standard offset	UTC+0	UTC-7
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 Phoenix?: Phoenix is 8 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 Phoenix from London?: Between 17:00–18:00 in London, which is 09:00–10:00 in Phoenix. That is the only stretch where both cities are inside a 09:00–18:00 day.
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 Phoenix observe daylight saving time?: No. Phoenix stays on UTC-7 all year, so its clocks never move.
If it is midday in London, what time is it in Phoenix?: It is 04:00 in Phoenix, 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 Phoenix use?: London uses Europe/London, currently UTC+1 (BST), and Phoenix uses America/Phoenix, currently UTC-7 (MST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.