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Pacific/Chatham

Pacific/Chatham is the IANA time zone for Chatham Islands in New Zealand.

UTC+13:45

Tue, Sep 29 UTC+13:45 CHADT

Offsets and daylight saving time

Standard offset
UTC+12:45
Daylight offset
UTC+13:45
Rule
Daylight saving time from the last Sunday in September at 02:45 to the first Sunday in April at 03:45 (local time).

Next clock changes

  • Sunday, April 4, 2027 at 03:45: back to UTC+12:45 (CHADT → CHAST)
  • Sunday, September 26, 2027 at 02:45: forward to UTC+13:45 (CHAST → CHADT)

Names

Generic name
Chatham Time
Abbreviation
CHAST / CHADT
Standard / daylight
Chatham Standard Time / Chatham Daylight Time
Aliases
NZ-CHAT (old ids that resolve to Pacific/Chatham)

Use it in code

// JavaScript
new Intl.DateTimeFormat('en-US', { timeZone: 'Pacific/Chatham' })

# Python
from zoneinfo import ZoneInfo
ZoneInfo('Pacific/Chatham')

-- PostgreSQL
SELECT now() AT TIME ZONE 'Pacific/Chatham';

Offset history since 1970

  • 1970–1973: UTC+12:45
  • 1974–2026: UTC+12:45 and UTC+13:45 each year

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