Where the Pacific/Guam time zone is used
Countries: 🇬🇺 Guam, 🇲🇵 Northern Mariana Islands.
Also known in software as: Pacific/Saipan.
Largest cities on Pacific/Guam
Dededo VillageDededo
Yigo VillageYigo
Tamuning-Tumon-Harmon VillageTamuning
Mangilao VillageMangilao
Barrigada VillageBarrigada
Santa Rita VillageSanta Rita
Mongmong-Toto-Maite VillageMongmong-Toto-Maite
Chalan Pago-Ordot VillageChalan Pago-Ordot
Yona VillageYona
Agana Heights VillageAgana Heights
AdacaoMangilao
Agat VillageAgat
Pacific/Guam time zone
Chamorro Time
Chamorro Standard Time (ChST)
IANA: Pacific/Guam · UTC+10
Daylight saving time in Pacific/Guam
Pacific/Guam does not use daylight saving time. The offset stays UTC+10 all year.
Sunrise and sunset in Pacific/Guam today
Sunrise 06:09 · Sunset 18:10
Daylight 12h 01m · Solar noon 12:10
Time in Pacific/Guam vs major world cities
| City | Local time | Difference from Pacific/Guam |
|---|
| New York | Thu | 14 hours behind |
| Los Angeles | Thu | 17 hours behind |
| London | Thu | 9 hours behind |
| Paris | Thu | 8 hours behind |
| Dubai | Thu | 6 hours behind |
| Mumbai | Thu | 4.5 hours behind |
| Singapore | Fri | 2 hours behind |
| Tokyo | Fri | 1 hour behind |
| Sydney | Fri | same time |
| Johannesburg | Thu | 8 hours behind |
| São Paulo | Thu | 13 hours behind |
| Chicago | Thu | 15 hours behind |
What time zone is Pacific/Guam in?
Pacific/Guam is on Chamorro Time (ChST, UTC+10). The IANA identifier is Pacific/Guam.
Does Pacific/Guam observe daylight saving time?
No. Pacific/Guam keeps UTC+10 all year, so its time difference with places that do change their clocks shifts by an hour twice a year.
Pacific/Guam in software and databases
Older software may still use Pacific/Saipan; these are aliases of Pacific/Guam and give identical times.
Standard offset UTC+10, no daylight saving time (as of 2026).
October 2026 calendar for Pacific/Guam
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|
| | | 1 | 2 | 3 | 4 |
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26 | 27 | 28 | 29 | 30 | 31 | |
Frequently asked questions about Pacific/Guam
What time zone is Pacific/Guam in?
Chamorro Time (ChST), UTC+10; IANA zone Pacific/Guam.
Does Pacific/Guam have daylight saving time?
No, it stays on UTC+10 all year.