IANA tz database · zone identifier

Pacific/Chatham

The IANA tz database identifier for Chatham Standard Time in New Zealand. Store this string — not the abbreviation, not the offset — and your timestamps stay correct forever.

UTC+12:45Abbreviation +1245Observes daylight saving
Time in Pacific/Chatham☀ Daylight
11:43:05
Thursday, July 16, 2026
Offset
UTC+12:45
Abbreviation
+1245
DST
Observed

Current offset

UTC+12:45

standard UTC+12:45 · daylight UTC+13:45

Abbreviation

+1245

tzdb uses numeric abbreviations here

DST behaviour

Observes

changes clocks twice a year

Country

🇳🇿 New Zealand

ISO 3166: NZ · view country page →

Using this identifier

The string to put in your code.

Pacific/Chatham is the identifier to use in code and config for this region. Every modern language, database, and OS resolves it through the same tz database, so the examples here behave identically everywhere.

Avoid storing +1245 or +12:45 — abbreviations are ambiguous and fixed offsets can't follow rule changes.

// format a date in this zone
new Intl.DateTimeFormat('en-US', {
timeZone: 'Pacific/Chatham',
dateStyle: 'full', timeStyle: 'long'
}).format(new Date());

Offset & DST behaviour

Two offsets,
every year.

Pacific/Chatham alternates between +1245 (UTC+12:45) and CHADT (UTC+13:45). Right now it is on +1245; clocks spring forward on 27 September 2026.

The year at a glance

CHADT · UTC+13:45+1245 · UTC+12:45CHADT · UTC+13:455 Apr · −1h27 Sept · +1h Jan 2026 Dec

Technical record

The database entry, in full.

source: IANA tz database

IdentifierPacific/Chatham
ISO country codeNZ🇳🇿 New Zealand
Reference coordinates43.95°S, 176.55°Wtz database reference point
Standard offsetUTC+12:45abbreviation +1245
Daylight offsetUTC+13:45abbreviation CHADT

Where it applies

One of New Zealand's 2 zones.

🇳🇿
New Zealand

5.3M people, 2 time zones — this identifier covers one of them.

Country page →

Frequently asked questions

Answers specific to this identifier — generated from the database record. Can't find what you need? Email [email protected].

What UTC offset is Pacific/Chatham?
Pacific/Chatham is currently UTC+12:45 (+1245). It alternates between UTC+12:45 in winter and UTC+13:45 in summer.
Does Pacific/Chatham observe daylight saving time?
Yes. Clocks spring forward at the next transition on 27 September 2026, as they do twice every year.
Which country uses Pacific/Chatham?
New Zealand. It is one of 2 IANA zones covering the country.
Is Pacific/Chatham the same as CHAST?
Pacific/Chatham is one of the IANA zones that keeps Chatham Standard Time (CHAST). Use Pacific/Chatham in software — CHAST is a human-friendly label, not a valid identifier.

Free · Developer API

This zone, as JSON.

Everything on this page — offset, abbreviation, DST rules, coordinates — from one endpoint, always current with the latest tzdb release.

GET /v1/timezones Live

countries, cities, convert, DST transitions coming next.

Get your free API key →
// this identifier, resolved live
GET /v1/timezones?iana=Pacific/Chatham
{
"iana": "Pacific/Chatham",
"utc_offset": "+12:45",
"abbreviation": "+1245",
"observes_dst": true,
"country": "NZ"
}