Time zone in Guam
- Time zone: Chamorro Standard Time
- UTC offset right now: UTC+10
- IANA time zone ID: Pacific/Guam
- Country: Guam
Daylight saving time
Guam does not observe daylight saving time, so the clock stays on Chamorro Standard Time (UTC+10) all year. That makes the gap to places that do switch, like New York or London, change by an hour twice a year.
Good to know
Guam is a US territory on Chamorro Standard Time, UTC+10. Because it sits west of the International Date Line, it is already tomorrow there for much of the US day.
Guam compared to other cities
| City | Time now | vs. Guam |
|---|---|---|
| New York | — | 15 hrs behind |
| Los Angeles | — | 18 hrs behind |
| Chicago | — | 16 hrs behind |
| London | — | 10 hrs behind |
| Paris | — | 9 hrs behind |
| Dubai | — | 6 hrs behind |
| Mumbai | — | 4 hrs 30 min behind |
| Tokyo | — | 1 hr behind |
Planning a call? Use the time zone converter to check any time of day.
Calling Guam
Normal office hours in Guam and New York don't overlap. The most workable window is 4 PM to 10 PM in New York, which is 7 AM to 1 PM in Guam, with one side starting early or finishing late.
Normal office hours in Guam and London don't overlap. The most workable window is 7 AM to 12 PM in London, which is 5 PM to 10 PM in Guam, with one side starting early or finishing late.
When it's 9 AM in Guam today, it's New York: Sat 6:00 PM · London: Sat 11:00 PM · Dubai: Sun 3:00 AM · Tokyo: Sun 8:00 AM · Sydney: Sun 10:00 AM.