America/Barbados

Time zone identifier: America/Barbados

Current civil offset: -04:00 (AST)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1911-08-28

Local Mean Time (LMT): -03:58:29 based on geographic meridian

Total recorded transitions: 15 transitions across 4 distinct offsets

Associated countries: BB

Historical Offset Step Chart (1880 to Present)

Text summary: America/Barbados shifted between 4 distinct offsets from 1911-08-28 through the modern era.

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1911-08-28T03:58:29Z`	`1911-08-27 23:58:29`	-03:58:29 → -04:00	`AST`	No	overlap
`1942-04-19T05:00:00Z`	`1942-04-19 02:00:00`	-04:00 → -03:00	`ADT`	Yes	gap
`1942-08-31T06:00:00Z`	`1942-08-31 02:00:00`	-03:00 → -04:00	`AST`	No	overlap
`1943-05-02T05:00:00Z`	`1943-05-02 02:00:00`	-04:00 → -03:00	`ADT`	Yes	gap
`1943-09-05T06:00:00Z`	`1943-09-05 02:00:00`	-03:00 → -04:00	`AST`	No	overlap
`1944-04-10T05:00:00Z`	`1944-04-10 01:30:00`	-04:00 → -03:30	`-0330`	Yes	gap
`1944-09-10T06:00:00Z`	`1944-09-10 02:00:00`	-03:30 → -04:00	`AST`	No	overlap
`1977-06-12T06:00:00Z`	`1977-06-12 03:00:00`	-04:00 → -03:00	`ADT`	Yes	gap
`1977-10-02T05:00:00Z`	`1977-10-02 01:00:00`	-03:00 → -04:00	`AST`	No	overlap
`1978-04-16T06:00:00Z`	`1978-04-16 03:00:00`	-04:00 → -03:00	`ADT`	Yes	gap
`1978-10-01T05:00:00Z`	`1978-10-01 01:00:00`	-03:00 → -04:00	`AST`	No	overlap
`1979-04-15T06:00:00Z`	`1979-04-15 03:00:00`	-04:00 → -03:00	`ADT`	Yes	gap
`1979-09-30T05:00:00Z`	`1979-09-30 01:00:00`	-03:00 → -04:00	`AST`	No	overlap
`1980-04-20T06:00:00Z`	`1980-04-20 03:00:00`	-04:00 → -03:00	`ADT`	Yes	gap
`1980-09-25T05:00:00Z`	`1980-09-25 01:00:00`	-03:00 → -04:00	`AST`	No	overlap

Source: northamerica (Lines 3113 to 3114)

Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
STDOFF	-3:58:29.2

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