Offset
The time difference between Greenwich Mean Time and Phoenix is 8 hours.
Greenwich Mean Time (BST) is ahead of Phoenix (MST).
BST: UTC+1
MST: UTC-7
Greenwich Mean Time is currently observing daylight saving time; Phoenix is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Greenwich Mean Time and Phoenix don't overlap on the same weekday. Phoenix is 8 hours behind Greenwich Mean Time.
With some flexibility, there’s a workable window outside standard hours:
- 3 PM–8 PM in Greenwich Mean Time (7 AM–12 PM in Phoenix) — suggest 5:00 PM Greenwich Mean Time (9:00 AM Phoenix).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United Kingdom
- Good FridayFri, Apr 3
- Early May Bank HolidayMon, May 4
- Spring Bank HolidayMon, May 25
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
About these zones
Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.
Phoenix uses Mountain Standard Time. To call United States, dial +1.
Phoenix is approximately 5,250 miles northwest of Greenwich Mean Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| GMT | Phoenix | Day |
|---|---|---|
| 12:00 am | 4:00 pm | -1 day |
| 1:00 am | 5:00 pm | -1 day |
| 2:00 am | 6:00 pm | -1 day |
| 3:00 am | 7:00 pm | -1 day |
| 4:00 am | 8:00 pm | -1 day |
| 5:00 am | 9:00 pm | -1 day |
| 6:00 am | 10:00 pm | -1 day |
| 7:00 am | 11:00 pm | -1 day |
| 8:00 am | 12:00 am | Same day |
| 9:00 am | 1:00 am | Same day |
| 10:00 am | 2:00 am | Same day |
| 11:00 am | 3:00 am | Same day |
| 12:00 pm | 4:00 am | Same day |
| 1:00 pm | 5:00 am | Same day |
| 2:00 pm | 6:00 am | Same day |
| 3:00 pm | 7:00 am | Same day |
| 4:00 pm | 8:00 am | Same day |
| 5:00 pm | 9:00 am | Same day |
| 6:00 pm | 10:00 am | Same day |
| 7:00 pm | 11:00 am | Same day |
| 8:00 pm | 12:00 pm | Same day |
| 9:00 pm | 1:00 pm | Same day |
| 10:00 pm | 2:00 pm | Same day |
| 11:00 pm | 3:00 pm | Same day |
Daylight saving time
Greenwich Mean Time observes daylight saving time; Phoenix does not. The offset between the two zones changes when Greenwich Mean Time transitions: on Sunday, October 25, 2026, clocks fall back from BST to GMT.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 7:37 AM
- Sunset
- 5:55 PM
- Day length
- 10h 18m
- Sunrise
- 6:38 AM
- Sunset
- 5:49 PM
- Day length
- 11h 11m
Cities in these zones
Cities in Greenwich Mean Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Airports in Mountain Standard Time
- AZA
- PHX
Related conversions
Common conversions
- What is 9:00 am GMT in Phoenix?
- 9:00 am GMT is 1:00 am Phoenix.
- What is 12:00 pm GMT in Phoenix?
- 12:00 pm GMT is 4:00 am Phoenix.
- What is 12:30 pm GMT in Phoenix?
- 12:30 pm GMT is 4:30 am Phoenix.
- What is 2:00 pm GMT in Phoenix?
- 2:00 pm GMT is 6:00 am Phoenix.
- What is 5:00 pm GMT in Phoenix?
- 5:00 pm GMT is 9:00 am Phoenix.
- What is 11:30 pm GMT in Phoenix?
- 11:30 pm GMT is 3:30 pm Phoenix.