Time Difference Between London and Arizona Time
As of 31 August 2026, Arizona Time is 8 hours behind London. That number is not constant. Over the course of a year, because of daylight saving changes, Arizona Time, United States ranges from 8 hours behind to 7 hours behind relative to London, United Kingdom. The calculator below is always up to date.
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London, United Kingdom
23:34
Mon, Aug 31, 2026
UTC+1 · Europe/London
Arizona Time, United States
-8h15:34
Mon, Aug 31, 2026
UTC-7 · MST · America/Phoenix
Arizona Time is 8 hours behind London.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| London | Monday, August 31, 2026 | Europe/London | UTC+1 | Active now |
| Arizona Time | Monday, August 31, 2026 | MSTAmerica/Phoenix | UTC-7 | Not observed |
Arizona Time: Most of Arizona does not observe daylight saving time, so it stays at UTC-7 all year — the same clock as Mountain Standard Time in winter, but 1 hour behind Mountain Time in summer. The Navajo Nation in Arizona is the exception and does observe it.
Hour by hour: London to Arizona Time
Every hour of today in London and what it is in Arizona Time. Highlighted rows fall inside Arizona Time working hours (09:00–18:00).
| London | Arizona Time |
|---|---|
| 00:00 | 16:00prev day |
| 01:00 | 17:00prev day |
| 02:00 | 18:00prev day |
| 03:00 | 19:00prev day |
| 04:00 | 20:00prev day |
| 05:00 | 21:00prev day |
| 06:00 | 22:00prev day |
| 07:00 | 23:00prev day |
| 08:00 | 00:00 |
| 09:00 | 01:00 |
| 10:00 | 02:00 |
| 11:00 | 03:00 |
| London | Arizona Time |
|---|---|
| 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 |
Best time to call or meet
Overlapping working hours
17:00–18:00 in London (09:00–10:00 in Arizona Time)
Both places are inside 09:00–18:00 for 1 hour a day. Anything in this window works without asking anyone to stay late.
Reasonable calling hours
16:00–21:00 in London (08:00–13:00 in Arizona Time)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
London puts its clocks back on Sunday, October 25, 2026
The local offset moves from UTC+1 to UTC. After that date, Arizona Time is 7 hours behind London — instead of 8 hours behind, as it is today.
Planning something with more than two places?
Adding a third city usually kills the obvious answer. The Meeting Time Finder takes up to five cities at once and shows only the hours that work for everybody.
London and Arizona Time: common questions
What is the time difference between London and Arizona Time?
As of 31 August 2026, Arizona Time is 8 hours behind London. The gap is not fixed: across the year, Arizona Time ranges from 8 hours behind to 7 hours behind relative to London, as clocks change. The calculator on this page always shows the difference for right now.
When it is 9:00 AM in London, what time is it in Arizona Time?
It is 01:00 AM in Arizona Time, United States. Use the time field in the calculator above to check any other hour.
Is Arizona Time ahead of or behind London?
Arizona Time is behind London by 8 hours at the moment. In practical terms, the working day in Arizona Time starts and ends later in London terms.
Do London and Arizona Time observe daylight saving time?
London changes its clocks twice a year; Arizona Time does not. The difference therefore shifts by an hour when London switches: across the year, Arizona Time ranges from 8 hours behind to 7 hours behind relative to London.
What is the best time to call Arizona Time from London?
Working hours overlap between 17:00 and 18:00 London time, which is 09:00 to 10:00 in Arizona Time. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for London, United Kingdom (UTC+1) and Arizona Time, United States (UTC-7) were generated on Monday, August 31, 2026 UTC and refresh in your browser.