Guam Honolulu Time Difference

What is the Time Difference Between Guam and Honolulu?

Guam is 20 hours ahead of Honolulu. Guam uses Chamorro Standard Time (ChST, UTC+10) while Honolulu uses Hawaii-Aleutian Standard Time (HST, UTC-10). When it's 12:00 PM in Guam, it's 4:00 PM the previous day in Honolulu.

Neither location observes daylight saving time, so the time difference remains constant year-round.

Best Time to Call Honolulu from Guam

Best calling time: 5:00 AM - 2:00 PM Guam time. This corresponds to 9:00 AM - 6:00 PM the previous day in Honolulu. Due to the large difference, calls often span different calendar days.

Guam and Honolulu are both US Pacific island territories/states with military and tourism importance. Guam is near the International Date Line, making it one of the first US territories to see each new day.

Popular Time Zone Comparisons

From Guam

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From Honolulu

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