Historically distinct IANA time zone
America/Argentina/San_Luis
- Countries
- Argentina
- GPS reference
- 33.32° S, 66.35° W
- Data source
- IANA southamerica
- Aliases
- None
- Rule groups
- , Arg
ArgentinaSan Luis (SL)
Geographic context
Where this clock belongs
The map marks the IANA reference location and associated country, not a time-zone boundary.
GPS reference: 33.32° S, 66.35° W. Associated countries: AR.
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.
These corrections were contributed by InterSoft Argentina S.A., obtaining the data from the: Talleres de Hidrografía Naval Argentina (Argentine Naval Hydrography Institute)
Original IANA source file: southamerica.
A shared present
Same clock today, different past
These nearby zones follow the same current annual pattern, yet retain their own historical record.
- America/Argentina/MendozaArgentina · 235 km from the reference location · Same annual clock since 2010
- America/Argentina/San_JuanArgentina · 284 km from the reference location · Same annual clock since 2010
- America/Argentina/CordobaArgentina · 295 km from the reference location · Same annual clock since 2010
Civil-time record
Recorded changes over time
From 1894 to 2009 · 62 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.
- -04:16 · CMTStandard time applies
- -04:00 · -04Standard time applies
- -03:00 · -03Daylight saving time begins
- -04:00 · -04Standard time applies
- -03:00 · -03Daylight saving time begins
- -04:00 · -04Standard time applies
Browse every recorded transition
| Local time after transition | Offset after | Abbreviation | Rule |
|---|---|---|---|
| 1894-10-31 00:08 | -04:16 | CMT | Standard time |
| 1920-05-01 00:16 | -04:00 | -04 | Standard time |
| 1930-12-01 01:00 | -03:00 | -03 | Daylight saving time |
| 1931-03-31 23:00 | -04:00 | -04 | Standard time |
| 1931-10-15 01:00 | -03:00 | -03 | Daylight saving time |
| 1932-02-29 23:00 | -04:00 | -04 | Standard time |
| 1932-11-01 01:00 | -03:00 | -03 | Daylight saving time |
| 1933-02-28 23:00 | -04:00 | -04 | Standard time |
| 1933-11-01 01:00 | -03:00 | -03 | Daylight saving time |
| 1934-02-28 23:00 | -04:00 | -04 | Standard time |
| 1934-11-01 01:00 | -03:00 | -03 | Daylight saving time |
| 1935-02-28 23:00 | -04:00 | -04 | Standard time |
| 1935-11-01 01:00 | -03:00 | -03 | Daylight saving time |
| 1936-02-29 23:00 | -04:00 | -04 | Standard time |
| 1936-11-01 01:00 | -03:00 | -03 | Daylight saving time |
| 1937-02-28 23:00 | -04:00 | -04 | Standard time |
| 1937-11-01 01:00 | -03:00 | -03 | Daylight saving time |
| 1938-02-28 23:00 | -04:00 | -04 | Standard time |
| 1938-11-01 01:00 | -03:00 | -03 | Daylight saving time |
| 1939-02-28 23:00 | -04:00 | -04 | Standard time |
| 1939-11-01 01:00 | -03:00 | -03 | Daylight saving time |
| 1940-02-29 23:00 | -04:00 | -04 | Standard time |
| 1940-07-01 01:00 | -03:00 | -03 | Daylight saving time |
| 1941-06-14 23:00 | -04:00 | -04 | Standard time |
| 1941-10-15 01:00 | -03:00 | -03 | Daylight saving time |
| 1943-07-31 23:00 | -04:00 | -04 | Standard time |
| 1943-10-15 01:00 | -03:00 | -03 | Daylight saving time |
| 1946-02-28 23:00 | -04:00 | -04 | Standard time |
| 1946-10-01 01:00 | -03:00 | -03 | Daylight saving time |
| 1963-09-30 23:00 | -04:00 | -04 | Standard time |
| 1963-12-15 01:00 | -03:00 | -03 | Daylight saving time |
| 1964-02-29 23:00 | -04:00 | -04 | Standard time |
| 1964-10-15 01:00 | -03:00 | -03 | Daylight saving time |
| 1965-02-28 23:00 | -04:00 | -04 | Standard time |
| 1965-10-15 01:00 | -03:00 | -03 | Daylight saving time |
| 1966-02-28 23:00 | -04:00 | -04 | Standard time |
| 1966-10-15 01:00 | -03:00 | -03 | Daylight saving time |
| 1967-04-01 23:00 | -04:00 | -04 | Standard time |
| 1967-10-01 01:00 | -03:00 | -03 | Daylight saving time |
| 1968-04-06 23:00 | -04:00 | -04 | Standard time |
| 1968-10-06 01:00 | -03:00 | -03 | Daylight saving time |
| 1969-04-05 23:00 | -04:00 | -04 | Standard time |
| 1969-10-05 01:00 | -03:00 | -03 | Standard time |
| 1974-01-23 01:00 | -02:00 | -02 | Daylight saving time |
| 1974-04-30 23:00 | -03:00 | -03 | Standard time |
| 1988-12-01 01:00 | -02:00 | -02 | Daylight saving time |
| 1989-03-04 23:00 | -03:00 | -03 | Standard time |
| 1989-10-15 01:00 | -02:00 | -02 | Daylight saving time |
| 1990-03-13 22:00 | -04:00 | -04 | Standard time |
| 1990-10-15 01:00 | -03:00 | -03 | Daylight saving time |
| 1991-02-28 23:00 | -04:00 | -04 | Standard time |
| 1991-06-01 01:00 | -03:00 | -03 | Standard time |
| 1999-10-03 00:00 | -03:00 | -03 | Daylight saving time |
| 2000-03-03 00:00 | -03:00 | -03 | Standard time |
| 2004-05-30 23:00 | -04:00 | -04 | Standard time |
| 2004-07-25 01:00 | -03:00 | -03 | Standard time |
| 2007-12-30 01:00 | -02:00 | -02 | Daylight saving time |
| 2008-01-20 23:00 | -03:00 | -03 | Daylight saving time |
| 2008-03-08 23:00 | -04:00 | -04 | Standard time |
| 2008-10-12 01:00 | -03:00 | -03 | Daylight saving time |
| 2009-03-07 23:00 | -04:00 | -04 | Standard time |
| 2009-10-11 01:00 | -03:00 | -03 | Standard time |