Historically distinct IANA time zone
America/Santo_Domingo
- Countries
- Dominican Republic
- GPS reference
- 18.47° N, 69.90° W
- Data source
- IANA northamerica
- Aliases
- None
- Rule groups
- , US
Dominican RepublicGeographic context
Where this clock belongs
The map marks the IANA reference location and associated country, not a time-zone boundary.
GPS reference: 18.47° N, 69.90° W. Associated countries: DO.
The Wikipedia link provides additional context; it is not evidence for a historical claim. Transition data comes from the IANA source file.
Notes from the time database
The story behind the clock
These source notes describe a period or rule. They do not, by themselves, establish a causal claim for a particular clock change.
War
Peace
Original IANA source file: northamerica.
A shared present
Same clock today, different past
These nearby zones follow the same current annual pattern, yet retain their own historical record.
- America/Puerto_RicoPuerto Rico · 400 km from the reference location · Same annual clock since 2001
- America/St_ThomasUnited States Virgin Islands · 524 km from the reference location · Same annual clock since 2001
- America/TortolaBritish Virgin Islands · 557 km from the reference location · Same annual clock since 2001
Puerto Rico · 400 km from the reference location · Same annual clock since 2001
United States Virgin Islands · 524 km from the reference location · Same annual clock since 2001
British Virgin Islands · 557 km from the reference location · Same annual clock since 2001Civil-time record
Recorded changes over time
From 1889 to 2000 · 17 recorded transitions
Recurring daylight-saving changes are grouped separately when JavaScript is available.
Notable changes
One-off changes and transitions outside the recurring seasonal rhythm.
- -04:40 · SDMTStandard time applies
- -05:00 · ESTStandard time applies
- -04:00 · EDTDaylight saving time begins
- -05:00 · ESTStandard time applies
- -04:30 · -0430Daylight saving time begins
- -05:00 · ESTStandard time applies
Browse every recorded transition
| Local time after transition | Offset after | Abbreviation | Rule |
|---|---|---|---|
| 1889-12-31 23:59 | -04:40 | SDMT | Standard time |
| 1933-04-01 11:40 | -05:00 | EST | Standard time |
| 1966-10-30 01:00 | -04:00 | EDT | Daylight saving time |
| 1967-02-27 23:00 | -05:00 | EST | Standard time |
| 1969-10-26 00:30 | -04:30 | -0430 | Daylight saving time |
| 1970-02-20 23:30 | -05:00 | EST | Standard time |
| 1970-10-25 00:30 | -04:30 | -0430 | Daylight saving time |
| 1971-01-19 23:30 | -05:00 | EST | Standard time |
| 1971-10-31 00:30 | -04:30 | -0430 | Daylight saving time |
| 1972-01-20 23:30 | -05:00 | EST | Standard time |
| 1972-10-29 00:30 | -04:30 | -0430 | Daylight saving time |
| 1973-01-20 23:30 | -05:00 | EST | Standard time |
| 1973-10-28 00:30 | -04:30 | -0430 | Daylight saving time |
| 1974-01-20 23:30 | -05:00 | EST | Standard time |
| 1974-10-27 01:00 | -04:00 | AST | Standard time |
| 2000-10-29 01:00 | -05:00 | EST | Standard time |
| 2000-12-03 02:00 | -04:00 | AST | Standard time |