ChST time now |
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17:14:11 Tue, 1 Jul 2025
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| UTC Offset: UTC +10 |
Chamorro Standard Time (ChST) operates at UTC+10 year-round and is used in Guam and the Northern Mariana Islands. ChST does not observe daylight saving time and is named after the Chamorro people, the indigenous inhabitants of the Mariana Islands. It provides a consistent time reference for these U.S. territories in the western Pacific.
Importance and Global Use of ChST
Chamorro Standard Time (ChST) is essential for maintaining uniform scheduling across Guam and the Northern Mariana Islands, supporting government operations, education, healthcare, and business activities. It ensures reliable coordination with U.S. mainland agencies, the military, and regional partners in the Pacific, which is critical for both civilian administration and strategic defense interests.
Globally, while ChST has limited commercial influence outside its region, it plays a key role in aviation, maritime navigation, and international telecommunications across the Pacific. The consistent UTC+10 offset helps synchronize trade, travel, and emergency response activities, benefiting regional stability and cooperation among Pacific island nations and the United States.
Where and When ChST is used worldwide
Pacific
Pacific islands and territories using ChST all year
- Guam
- Northern Mariana Islands
Other Time Zones in UTC +10
Other time zones share the same offset as Chamorro Standard Time (ChST), but are known by different names. While their clocks align, they may represent different regions or countries based on local time zone definitions.
- Australian Eastern Standard Time – AEST
- Chuuk Time – CHUT
- Dumont-d'Urville Time – DDUT
- Papua New Guinea Time – PGT
- Vladivostok Time – VLAT