Atlantic/Cape_Verde

Time zone identifier: Atlantic/Cape_Verde

Current civil offset: -01:00 (-01)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1912-01-01

Local Mean Time (LMT): -01:34:04 based on geographic meridian

Total recorded transitions: 4 transitions across 3 distinct offsets

Associated countries: CV

Historical Offset Step Chart (1880 to Present)

Text summary: Atlantic/Cape_Verde shifted between 3 distinct offsets from 1912-01-01 through the modern era.

Complete Transition History (4 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1912-01-01T02:00:00Z`	`1912-01-01 00:00:00`	-01:34:04 → -02:00	`-02`	No	overlap
`1942-09-01T02:00:00Z`	`1942-09-01 01:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1945-10-15T01:00:00Z`	`1945-10-14 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1975-11-25T04:00:00Z`	`1975-11-25 03:00:00`	-02:00 → -01:00	`-01`	No	gap

Notes from the Maintainers

Source: africa (Lines 103 to 110)

Cape Verde / Cabo Verde

From Tim Parenti (2024-07-01), per Paul Eggert (2018-02-16):
For timestamps before independence, see commentary for Europe/Lisbon.
Shanks gives 1907 instead for the transition to -02.

Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]

Attributed Statements:

Tim Parenti (2024-07-01):

For timestamps before independence, see commentary for Europe/Lisbon. Shanks gives 1907 instead for the transition to -02. 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.