London to Tucson
Converting a fixed time. Europe/London → America/Phoenix · 8,527 km (5,295 miles) apart
Clocks go back 1 hour on Sunday, 25th October 2026, at 1:59 am local time (1:00 am after the change).
Clocks here do not change — this zone stays on the same offset all year.
Convert a specific time minutes work, not just whole hours
Hour by hour
| London | Tucson | 24h | Good to call? |
|---|---|---|---|
| 12am | 4pm Wed | 00:00 → 16:00 | asleep in London |
| 1am | 5pm Wed | 01:00 → 17:00 | asleep in London |
| 2am | 6pm Wed | 02:00 → 18:00 | asleep in London |
| 3am | 7pm Wed | 03:00 → 19:00 | asleep in London |
| 4am | 8pm Wed | 04:00 → 20:00 | asleep in London |
| 5am | 9pm Wed | 05:00 → 21:00 | asleep in London |
| 6am | 10pm Wed | 06:00 → 22:00 | asleep in Tucson |
| 7am | 11pm Wed | 07:00 → 23:00 | asleep in Tucson |
| 8am | 12am | 08:00 → 00:00 | asleep in Tucson |
| 9am now | 1am | 09:00 → 01:00 | asleep in Tucson |
| 10am | 2am | 10:00 → 02:00 | asleep in Tucson |
| 11am | 3am | 11:00 → 03:00 | asleep in Tucson |
| 12pm | 4am | 12:00 → 04:00 | asleep in Tucson |
| 1pm | 5am | 13:00 → 05:00 | asleep in Tucson |
| 2pm | 6am | 14:00 → 06:00 | asleep in Tucson |
| 3pm | 7am | 15:00 → 07:00 | awake, not at work |
| 4pm | 8am | 16:00 → 08:00 | awake, not at work |
| 5pm | 9am | 17:00 → 09:00 | awake, not at work |
| 6pm | 10am | 18:00 → 10:00 | awake, not at work |
| 7pm | 11am | 19:00 → 11:00 | awake, not at work |
| 8pm | 12pm | 20:00 → 12:00 | awake, not at work |
| 9pm | 1pm | 21:00 → 13:00 | awake, not at work |
| 10pm | 2pm | 22:00 → 14:00 | asleep in London |
| 11pm | 3pm | 23:00 → 15:00 | asleep in London |
Call times
There is no hour when both places are inside normal working hours. The least bad slot is usually early morning at the western end.
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Questions people ask
What time is it in Tucson when it is 9:00 am in London?
1:00 am in Tucson the same day.
How many hours ahead is Tucson of London?
Tucson is 8 hours behind London. That gap is not fixed: it changes when either place starts or ends daylight saving. The table on this page is recalculated for today, so it is already correct for the current season.
What is the best time to call between London and Tucson?
There is no hour when both places are inside normal working hours. The least bad slot is usually early morning at the western end.
When does the difference between London and Tucson change?
London: Clocks go back 1 hour on Sunday, 25th October 2026, at 1:59 am local time (1:00 am after the change). Tucson does not change its clocks, so the gap shifts by an hour on that date.