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About ChST
ChST (Chamorro Standard Time) is the standard time zone used in Guam and the Northern Mariana Islands. The time zone offset of ChST is UTC+10:00, which means it is 10 hours ahead of Coordinated Universal Time (UTC).
Chamorro Standard Time does not observe daylight saving time, so the time remains the same throughout the year. It is named after the Chamorro people, the indigenous inhabitants of Guam and the Northern Mariana Islands.
ChST is used across Guam and the Northern Mariana Islands, including major population centers such as Hagåtña, Dededo, Saipan, Tinian, and Rota. It serves as the official time standard for the region year-round.