Pacific/Niue

Time zone identifier: Pacific/Niue

Current civil offset: -11:00 (-11)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1952-10-16

Local Mean Time (LMT): -11:19:40 based on geographic meridian

Total recorded transitions: 2 transitions across 3 distinct offsets

Associated countries: NU

Historical Offset Step Chart (1880 to Present)

Text summary: Pacific/Niue shifted between 3 distinct offsets from 1952-10-16 through the modern era.

Complete Transition History (2 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1952-10-16T11:19:40Z`	`1952-10-15 23:59:40`	-11:19:40 → -11:20	`-1120`	No	overlap
`1964-07-01T11:20:00Z`	`1964-07-01 00:20:00`	-11:20 → -11:00	`-11`	No	gap

Notes from the Maintainers

Source: australasia (Lines 640 to 654)

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Niue
See Pacific/Rarotonga comments for 1952 transition.

From Tim Parenti (2021-09-13):
Consecutive contemporaneous editions of The Air Almanac listed -11:20 for
Niue as of Apr 1964 but -11 as of Aug 1964:
Apr 1964: https://books.google.com/books?id=_1So677Y5vUC&pg=SL1-PA23
Aug 1964: https://books.google.com/books?id=MbJloqd-zyUC&pg=SL1-PA23
Without greater specificity, guess 1964-07-01 for this transition.

Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]

Attributed Statements:

Tim Parenti (2021-09-13):

Consecutive contemporaneous editions of The Air Almanac listed -11:20 for Niue as of Apr 1964 but -11 as of Aug 1964: Apr 1964: https://books.google.com/books?id=_1So677Y5vUC&pg=SL1-PA23 Aug 1964: https://books.google.com/books?id=MbJloqd-zyUC&pg=SL1-PA23 Without greater specificity, guess 1964-07-01 for this transition. Zone NAME STDOFF RULES FORMAT [UNTIL]

Years on Record

Methodology Note: The 1970 Rule

tzdb guarantees accuracy for timestamps from 1970 onwards. Transitions prior to 1970 represent best-effort historical reconstructions.