Current Time in Pacific/Johnston Time Zone
IANA Name: Pacific/Johnston
Standard Offset: UTC −10:00
Daylight Saving: No
Currently Observing DST: No ❌
Pacific/Johnston Time Zone: A Constant Hour in the Central Pacific
The Pacific/Johnston time zone covers Johnston Atoll, a remote, unincorporated territory of the United States located in the North Pacific Ocean. It uses Hawaii-Aleutian Standard Time (HST) year-round, with no daylight saving time. This article explains the zone's fixed offset, its unique history, and practical scheduling considerations for anyone coordinating with Johnston Atoll.
Where and Who: Johnston Atoll
Pacific/Johnston applies solely to Johnston Atoll (19.5°N, 169.5°W), a coral atoll comprising four islands. The atoll was historically used as a military base and wildlife refuge. Today, it is uninhabited except for periodic scientific and maintenance visits by U.S. government personnel. The time zone is maintained for historical consistency and potential future operations.
Offset and Abbreviation: HST
The standard offset is UTC-10:00, known as Hawaii-Aleutian Standard Time (HST). This offset is constant throughout the year; the zone does not observe daylight saving time. The abbreviation HST is shared with other zones at this offset, such as Pacific/Honolulu and America/Adak (though Adak switches to HDT in summer).
No Daylight Saving: A Perpetual Rhythm
Because Johnston Atoll lies near the equator (latitude 19.5°N), seasonal day-length variation is minimal. The U.S. government decided not to apply DST to the atoll, aligning it with Hawaii's year-round HST. Thus, the time never springs forward or falls back. The sun rises and sets within a narrow window year-round, roughly 6:30 a.m. to 6:30 p.m. HST.
Countries and Cities
The only territory using Pacific/Johnston is the U.S. Minor Outlying Islands (Johnston Atoll). There are no permanent cities. The nearest populated areas are Honolulu, Hawaii (same offset) and other Pacific islands like Papeete, Tahiti (UTC-10:00) and Rarotonga, Cook Islands (UTC-10:00).
Practical Scheduling Guidance
When coordinating with Johnston Atoll, note that HST is 5 hours behind Eastern Standard Time (EST) during standard time, and 6 hours behind Eastern Daylight Time (EDT). For example, 9:00 a.m. in New York (EST) is 4:00 a.m. HST. During U.S. DST (March to November), the gap widens to 6 hours. For calls with Tokyo (UTC+9), Johnston is 19 hours behind; with London (UTC+0), it is 10 hours behind. Use world clock tools to avoid scheduling outside local working hours.
Frequently Asked Questions
Does Johnston Atoll observe daylight saving time?
No. Pacific/Johnston stays on Hawaii-Aleutian Standard Time (UTC-10:00) all year. There is no spring-forward or fall-back.
What is the current time in Johnston Atoll?
Since the zone does not change, the time is always UTC-10:00. You can check any world clock set to Pacific/Johnston or HST.
Is Johnston Atoll the same time as Hawaii?
Yes, both use HST year-round. Pacific/Honolulu and Pacific/Johnston share the same offset and never observe DST.
Who lives in Johnston Atoll?
The atoll is uninhabited. It is managed by the U.S. Fish and Wildlife Service as a wildlife refuge. Only occasional scientific or maintenance personnel visit.
Why does Johnston Atoll have its own time zone?
It is a legacy of its past as a military base. The IANA keeps Pacific/Johnston for historical continuity and to support any future operations.
What is the time difference between Johnston Atoll and New York?
During Eastern Standard Time (EST), Johnston is 5 hours behind. During Eastern Daylight Time (EDT), it is 6 hours behind.