GMT+13:45 Time Zone Countries list - UTC+13:45 Time Now
UTC+13:45 is thirteen hours and forty-five minutes ahead of Coordinated Universal Time. Only one place uses it: the Chatham Islands of New Zealand, and only during the southern summer daylight saving period.
UTC+13:45
Friday, 4 September 2026
UTC+12:45 · Pacific/Chatham
Shown for Pacific/Chatham, which uses this offset for part of the year and is now on daylight saving time
- Offset: UTC+13:45
- Time zones with this offset: 1 (Pacific/Chatham)
- Daylight saving time: 1 of 1 zones here move the clock in summer, so their offset changes for part of the year.
Cities in UTC+13:45
- Wairau Valley New Zealand
- Windsor Park New Zealand
- Waitangi New Zealand
Countries in UTC+13:45
Neighbouring offsets
World time zone map · All UTC offsets · Time by country
The strangest offset in regular use
Almost every time zone is a whole number of hours from UTC. A few are offset by thirty minutes. A very small number are offset by forty-five, and UTC+13:45 is the furthest forward of those — the most unusual clock in ordinary daily use anywhere.
It belongs to the Chatham Islands, an archipelago roughly 800 kilometres east of the New Zealand mainland with a population of a few hundred people. Their standard time is UTC+12:45. When New Zealand shifts to daylight saving, the Chathams shift with it, arriving at UTC+13:45.
Why forty-five minutes
The islands sit east of the mainland, far enough that mainland time would have put their clocks noticeably out of step with the sun, but not far enough to justify a full hour. Forty-five minutes was chosen as the closest reasonable fit, and it has stayed.
The result is a clock that no other populated place shares. Chatham Islands time is forty-five minutes ahead of Auckland at every moment of the year, in both standard and daylight periods. A time zone for a few hundred people, forty-five minutes off the nearest alternative — proof that clocks are set to suit the people living under them, not to suit spreadsheets.
Daylight saving in the Chathams
The islands follow the New Zealand daylight saving calendar exactly. Clocks move forward one hour in late September and back one hour in early April, the same dates the mainland uses. Only the base offset differs.
Southern winter: UTC+12:45, Chatham Standard Time Southern summer: UTC+13:45, Chatham Daylight Time Difference from Auckland: forty-five minutes, always Difference from mainland New Zealand's offset: one hour of daylight saving applied to a different base
Handling it in practice
Forty-five-minute offsets are where badly written date handling tends to break. Systems that assume whole hours, or even half hours, will place Chatham Islands time wrongly, and the error is small enough to survive casual testing.
Use the IANA identifier Pacific/Chatham. Do not store the offset as a number. Test any scheduling code against this zone specifically — it exercises the awkward cases. When arranging anything with the islands, convert from Auckland and add forty-five minutes rather than working from UTC directly.
Questions and answers
- Is anywhere else on UTC+13:45?
- No. The Chatham Islands are the only place using this offset, and only during New Zealand's daylight saving period.
- What is Chatham Islands time in winter?
- UTC+12:45. The islands drop back by one hour when daylight saving ends in early April.
- How far ahead of Wellington are the Chatham Islands?
- Forty-five minutes, all year. Both change their clocks on the same dates, so the gap between them never varies.