Oceania · Polynesia · Dependency
Current time in Cook Islands
A single time zone at UTC-10:00.
Saturday, May 30, 2026
About Cook Islands's time
A single time zone.
The Cook Islands observe a single time zone—Cook Island Time—at UTC−10, without daylight saving time. The entire island group shares the same clock year-round.
Major cities
Cities of Cook Islands.
History
How Cook Islands keeps time.
The Cook Islands officially adopted UTC−10:00 in 1899 by act of the Cook Islands parliament. This put all of the islands on the same time, roughly equivalent to solar mean time. The Cook Islands, as a self-governing state in free association with New Zealand, have maintained consistent timekeeping without adopting daylight saving time. Unlike nearby Samoa (which switched hemispheres and jumped the International Date Line in 2011), the Cook Islands have remained on the American side of the date line. The islands in the Cook Islands span from roughly 156° to 167° west longitude, which naturally corresponds closely to UTC−10.
Did you know?
Things about Cook Islands's time.
The Cook Islands are one hour behind Hawaii. While Hawaii observes UTC−10 without daylight saving, the islands in the Cook Islands archipelago span across two different "natural" time zones due to their breadth of longitude from roughly 156° to 167° west. All islands use a single time zone despite this. The island of Penrhyn, the farthest north, is about the same as Hawaii. One consequence of the shared offset used throughout the year is that no adjustments to clocks are made, keeping things simple even during the Southern Hemisphere summer.
Frequently asked questions
Common questions about Cook Islands's time zone, daylight saving rules, and how to handle it in software. Can't find what you need? Email [email protected].
- What time zone is the Cook Islands in?
- The Cook Islands are in the Cook Islands Time (CKT) time zone, which is UTC−10. The official IANA time zone is "Pacific/Rarotonga".
- Does the Cook Islands observe daylight saving time?
- No. The Cook Islands use UTC−10 year-round with no daylight saving adjustments.
- Is the Cook Islands time zone the same as Hawaii?
- Yes. Both are UTC−10. The Cook Islands are essentially the same clock time as Hawaii, though on the opposite side of the International Date Line.
- How many time zones do the Cook Islands have?
- Just one. All islands in the group—from Rarotonga in the south to Penrhyn in the north—use the single zone UTC−10.
- What does the "Cook Islands Time" abbreviation stand for?
- The standard abbreviation is CKT, which stands for Cook Islands Time.
- How does Cook Islands time compare to New Zealand time?
- The Cook Islands are 22 to 23 hours behind New Zealand due to the International Date Line. When it is morning in New Zealand, it is the previous day's morning in the Cook Islands, despite similar longitude adjustments.
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