Time difference between United Kingdom and Guam: 9 hours
United Kingdom is 9 hours behind Guam
Best time for a call or meeting
United Kingdom 07:00–13:00 = Guam 16:00–22:00
Business hours never overlap, so these are the hours when both cities are awake (7:00–22:00).
Convert a specific time
Hour-by-hour conversion
| United Kingdom | Guam |
|---|---|
| 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 | 00:00 |
| 16:00 | 01:00 |
| 17:00 | 02:00 |
| 18:00 | 03:00 |
| 19:00 | 04:00 |
| 20:00 | 05:00 |
| 21:00 | 06:00 |
| 22:00 | 07:00 |
| 23:00 | 08:00 |
Daylight saving time can change the difference by season. Shown values reflect the current offset.
Frequently asked questions
How many hours is the time difference between United Kingdom and Guam?
United Kingdom is 9 hours behind Guam. When it is 12:00 noon in United Kingdom, it is 21:00 in Guam.
Does daylight saving time affect the difference?
Yes. One or both places observe daylight saving time, so the difference changes with the season. This page shows the current difference.
What is the best time for a call or meeting?
United Kingdom 07:00–13:00 = Guam 16:00–22:00. Business hours never overlap, so these are the hours when both cities are awake (7:00–22:00).