Historically distinct IANA time zone
America/Puerto_Rico
- Countries
- Puerto Rico
- GPS reference
- 18.47° N, 66.11° W
- Data source
- IANA northamerica
- Aliases
- America/Virgin
- Rule groups
- US
Puerto RicoGeographic 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, 66.11° W. Associated countries: PR.
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.
Dominican Republic · 400 km from the reference location · Same annual clock since 2001
MQ · 687 km from the reference location · Same annual clock since 1981
Barbados · 915 km from the reference location · Same annual clock since 1981Civil-time record
Recorded changes over time
From 1899 to 1945 · 4 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.
- -04:00 · ASTStandard time applies
- -03:00 · AWTDaylight saving time begins
- -03:00 · APTDaylight saving time begins
- -04:00 · ASTStandard time applies
Browse every recorded transition
| Local time after transition | Offset after | Abbreviation | Rule |
|---|---|---|---|
| 1899-03-28 12:24 | -04:00 | AST | Standard time |
| 1942-05-03 01:00 | -03:00 | AWT | Daylight saving time |
| 1945-08-14 20:00 | -03:00 | APT | Daylight saving time |
| 1945-09-30 01:00 | -04:00 | AST | Standard time |