All of Guam keeps one time, UTC+10, all year round.
Guam at a glance
| Capital | Hagåtña |
|---|---|
| UTC offsets | UTC+10 |
| IANA time zones | 1 |
| Daylight saving time | Not observed since 1977 |
| Abbreviations in use | ChST |
Which time zone Guam uses
The whole of Guam follows one IANA time zone: Pacific/Guam.
| Time zone | Time now | UTC offset | Daylight saving time | Main cities |
|---|---|---|---|---|
| Pacific/Guam | --:-- | UTC+10 | Not observed | Dededo, Hagåtña |
Clock changes in Guam
Clocks in Guam last changed for daylight saving time in 1977. Since then the offset has stayed the same all year.
Local time in the largest cities of Guam
Time difference between Guam and other countries
A 9:00 AM start in Guam is 6:00 PM (previous day) in New York, 10:00 AM in Sydney and 3:00 PM (previous day) in Los Angeles.
| City | Time now | Difference now | In January | In July |
|---|---|---|---|---|
| New York (United States) | --:-- | 15 h behind | 15 h behind | 14 h behind |
| Los Angeles (United States) | --:-- | 18 h behind | 18 h behind | 17 h behind |
| London (United Kingdom) | --:-- | 10 h behind | 10 h behind | 9 h behind |
| Paris (France) | --:-- | 9 h behind | 9 h behind | 8 h behind |
| Dubai (United Arab Emirates) | --:-- | 6 h behind | 6 h behind | 6 h behind |
| Mumbai (India) | --:-- | 4 h 30 min behind | 4 h 30 min behind | 4 h 30 min behind |
| Singapore | --:-- | 2 h behind | 2 h behind | 2 h behind |
| Tokyo (Japan) | --:-- | 1 h behind | 1 h behind | 1 h behind |
| Sydney (Australia) | --:-- | 1 h ahead | 1 h ahead | Same time |
| UTC | --:-- | 10 h behind | 10 h behind | 10 h behind |
Daylight across Guam
In Hagåtña, daylight runs from 11 hours 20 minutes at the December solstice to 12 hours 55 minutes at the June solstice.
Same clock as Guam right now
These countries read the same time as Guam today. Those marked with daylight saving time will drift away when their clocks change.
Plan around the time in Guam
- Convert a time to or from Guam: pick a date and time and see it in every city on your list.
- Add Hagåtña to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Guam and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
How many time zones does Guam have?
One: Pacific/Guam, at UTC+10 all year.
Does Guam use daylight saving time?
Not any more. Clocks last changed for daylight saving time in 1977.
What is the time difference between Guam and New York?
Guam is 15 hours ahead of New York in January and 14 hours ahead of New York in July, because New York moves its clocks for daylight saving time and Guam does not.
Time zone rules: IANA tz database, version 2026e. Place names and coordinates: GeoNames. Sunrise and sunset are calculated from the coordinates and can differ by a minute or two from local almanacs.