America/Santo_Domingo

Time zone identifier: America/Santo_Domingo

Current civil offset: -04:00 (AST)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1890-01-01

Local Mean Time (LMT): -04:39:36 based on geographic meridian

Total recorded transitions: 17 transitions across 5 distinct offsets

Associated countries: DO

Historical Offset Step Chart (1880 to Present)

Text summary: America/Santo_Domingo shifted between 5 distinct offsets from 1890-01-01 through the modern era.

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1890-01-01T04:39:36Z`	`1889-12-31 23:59:36`	-04:39:36 → -04:40	`SDMT`	No	overlap
`1933-04-01T16:40:00Z`	`1933-04-01 11:40:00`	-04:40 → -05:00	`EST`	No	overlap
`1966-10-30T05:00:00Z`	`1966-10-30 01:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`1967-02-28T04:00:00Z`	`1967-02-27 23:00:00`	-04:00 → -05:00	`EST`	No	overlap
`1969-10-26T05:00:00Z`	`1969-10-26 00:30:00`	-05:00 → -04:30	`-0430`	Yes	gap
`1970-02-21T04:30:00Z`	`1970-02-20 23:30:00`	-04:30 → -05:00	`EST`	No	overlap
`1970-10-25T05:00:00Z`	`1970-10-25 00:30:00`	-05:00 → -04:30	`-0430`	Yes	gap
`1971-01-20T04:30:00Z`	`1971-01-19 23:30:00`	-04:30 → -05:00	`EST`	No	overlap
`1971-10-31T05:00:00Z`	`1971-10-31 00:30:00`	-05:00 → -04:30	`-0430`	Yes	gap
`1972-01-21T04:30:00Z`	`1972-01-20 23:30:00`	-04:30 → -05:00	`EST`	No	overlap
`1972-10-29T05:00:00Z`	`1972-10-29 00:30:00`	-05:00 → -04:30	`-0430`	Yes	gap
`1973-01-21T04:30:00Z`	`1973-01-20 23:30:00`	-04:30 → -05:00	`EST`	No	overlap
`1973-10-28T05:00:00Z`	`1973-10-28 00:30:00`	-05:00 → -04:30	`-0430`	Yes	gap
`1974-01-21T04:30:00Z`	`1974-01-20 23:30:00`	-04:30 → -05:00	`EST`	No	overlap
`1974-10-27T05:00:00Z`	`1974-10-27 01:00:00`	-05:00 → -04:00	`AST`	No	gap
`2000-10-29T06:00:00Z`	`2000-10-29 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2000-12-03T06:00:00Z`	`2000-12-03 02:00:00`	-05:00 → -04:00	`AST`	No	gap

Source: northamerica (Lines 3532 to 3532)

Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]

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