Historically distinct IANA time zone
America/Costa_Rica
- Countries
- Costa Rica
- GPS reference
- 9.93° N, 84.08° W
- Data source
- IANA northamerica
- Aliases
- None
- Rule groups
- CR
Costa RicaGeographic context
Where this clock belongs
The map marks the IANA reference location and associated country, not a time-zone boundary.
GPS reference: 9.93° N, 84.08° W. Associated countries: CR.
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.
The tzdata source notes: 00; go with Shanks & Pottenger.
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.
Nicaragua · 344 km from the reference location · Same annual clock since 2007
Honduras · 575 km from the reference location · Same annual clock since 2007
El Salvador · 697 km from the reference location · Same annual clock since 1993Civil-time record
Recorded changes over time
From 1890 to 1992 · 10 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.
- -05:36 · SJMTStandard time applies
- -06:00 · CSTStandard time applies
- -05:00 · CDTDaylight saving time begins
- -06:00 · CSTStandard time applies
- -05:00 · CDTDaylight saving time begins
- -06:00 · CSTStandard time applies
Browse every recorded transition
| Local time after transition | Offset after | Abbreviation | Rule |
|---|---|---|---|
| 1890-01-01 00:00 | -05:36 | SJMT | Standard time |
| 1921-01-14 23:36 | -06:00 | CST | Standard time |
| 1979-02-25 01:00 | -05:00 | CDT | Daylight saving time |
| 1979-06-02 23:00 | -06:00 | CST | Standard time |
| 1980-02-24 01:00 | -05:00 | CDT | Daylight saving time |
| 1980-05-31 23:00 | -06:00 | CST | Standard time |
| 1991-01-19 01:00 | -05:00 | CDT | Daylight saving time |
| 1991-06-30 23:00 | -06:00 | CST | Standard time |
| 1992-01-18 01:00 | -05:00 | CDT | Daylight saving time |
| 1992-03-14 23:00 | -06:00 | CST | Standard time |