What is the time difference between London and Phoenix?

London is 7 hours ahead of Phoenix when the UK observes GMT (winter, UTC+0), and 8 hours ahead when the UK observes BST (summer, UTC+1). Phoenix stays on MST (UTC-7) year-round and never changes its clocks.

Does Phoenix observe Daylight Saving Time?

No. Arizona — including Phoenix — does not observe Daylight Saving Time. Phoenix stays on Mountain Standard Time (MST, UTC-7) all year. Only the Navajo Nation within Arizona does observe DST.

When does the offset change between London and Phoenix?

The offset changes only when the UK shifts its clocks: forward on the last Sunday in March (GMT → BST, offset becomes 8 hours) and back on the last Sunday in October (BST → GMT, offset returns to 7 hours).

What are good meeting times for both London and Phoenix?

When London is on BST (8-hour gap), the best overlap is 17:00–18:00 London time (09:00–10:00 Phoenix). When London is on GMT (7-hour gap), 16:00–18:00 London (09:00–11:00 Phoenix) gives more overlap. The meeting finder on this page highlights the best windows automatically.

Is this tool accurate for scheduling?

Yes. It uses the IANA timezone database embedded in your browser — the same source used by operating systems and calendar apps. Accuracy depends on your device clock being synchronized via NTP, which most devices do automatically.

Why is Phoenix in a different time zone from the rest of Arizona?

Most of Arizona, including Phoenix, observes MST year-round. The Navajo Nation in northeastern Arizona does observe DST and follows Mountain Daylight Time (MDT, UTC-6) in summer. Phoenix and the surrounding metro area always stay on MST.

Time Difference: London to Phoenix

Name: Time Difference: London to Phoenix
Availability: InStock
Author: Nham Vu

See the current time in London and Phoenix side by side, with the exact hour offset and a business-hours overlap finder, updated live every second.

London, United Kingdom

--:--:--

GMT UTC+0

Phoenix, Arizona, United States

--:--:--

MST UTC-7 (no DST)

Current Offset

+7 hours

London is 7 hours ahead of Phoenix

Phoenix never observes DST — offset changes only when London shifts between GMT and BST.

Convert a Specific Time

Enter a London time to see the equivalent Phoenix time, or vice versa

London time

Phoenix time (MST)

Edit either field — the other updates automatically using the live offset.

Meeting Overlap Finder

Business hours (09:00–18:00) highlighted — best overlap shaded

London	Phoenix	Status

Convert London Time to Phoenix Time

Based on the current offset — updates automatically

London	Phoenix (MST)

Summary

See the current time in London and Phoenix side by side, with the exact hour offset and a business-hours overlap finder, updated live every second.

How it works

Your browser reads the current moment from your device clock.
It converts that moment to Europe/London time using the IANA timezone database built into modern browsers.
The same moment is converted to America/Phoenix time (MST, UTC-7, no DST).
The UTC offsets of both cities are compared to calculate the exact hour difference.
All three values — London time, Phoenix time, and the offset — refresh every second.
When London shifts between GMT and BST, the offset changes automatically from 7 to 8 hours.

Use cases

Scheduling video calls between London and Phoenix offices.
Checking if a colleague in Phoenix is still at their desk.
Planning travel between the UK and Arizona.
Remote teams coordinating daily standups across the UK and US Southwest.
Finding overlapping business hours for London–Phoenix meetings.
Verifying the current offset, which changes only when the UK shifts clocks.
Tech and finance professionals aligning UK and Arizona schedules.
Students and teachers arranging online lessons across the Atlantic.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu