Time in Argentina
From Wikipedia, the free encyclopedia
Argentina is located at a longitude that would naturally put it in the UTC−04:00 or UTC−05:00 time zone; however, it actually uses the UTC−03:00 time zone. Argentina determines whether to change clocks in observation of daylight saving time on a year-by-year basis, and individual provinces may opt out of the federal decision. At present, Argentina does not change clocks.[citation needed]
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The Argentine Hydrographic Service[1] maintains the official national time.
History
The first official standardization of time in Argentina took place on 31 October 1894, with establishment of UTC−04:00 as the nation's standard time.[2] From 1920 to 1969, the official time switched biannually between UTC−04:00 as standard time in winter and UTC−03:00 as daylight saving time in summer.[3] From 1974 to 1993, clocks advanced again, such that the official time switched biannually between UTC−03:00 as winter DST and UTC−02:00 as summer double DST.[4] In 1993, the national time was fixed at UTC−03:00, called Argentina Time (ART;[5][6] Spanish: hora oficial argentina, HOA). In 2007 and 2008, biannual switching between UTC−3:00 (winter DST) and UTC−2:00 (summer DST) resumed; in 2009, this was replaced again with year-round UTC−3:00 (permanent DST).[7]
IANA time zone database
In the file zone.tab of the IANA time zone database Argentina has the following zones:
| C.c.* | Coordinates* | TZ* | Comments* | UTC offset | UTC offset DST | Map |
|---|---|---|---|---|---|---|
| AR | −3436 | America | Buenos Aires (BA, CF) | −03:00 | −03:00 |  |
| AR | −3124 | America | most areas: CB, CC, CN, ER, FM, MN, SE, SF | −03:00 | −03:00 |  |
| AR | −2447 | America | Salta (SA, LP, NQ, RN) | −03:00 | −03:00 |  |
| AR | −2411 | America | Jujuy (JY) | −03:00 | −03:00 |  |
| AR | −2649 | America | Tucumán (TM) | −03:00 | −03:00 |  |
| AR | −2828 | America | Catamarca (CT), Chubut (CH) | −03:00 | −03:00 |  |
| AR | −2926 | America | La Rioja (LR) | −03:00 | −03:00 |  |
| AR | −3132 | America | San Juan (SJ) | −03:00 | −03:00 |  |
| AR | −3253 | America | Mendoza (MZ) | −03:00 | −03:00 |  |
| AR | −3319 | America | San Luis (SL) | −03:00 | −03:00 |  |
| AR | −5138 | America | Santa Cruz (SC) | −03:00 | −03:00 |  |
| AR | −5448 | America | Tierra del Fuego (TF) | −03:00 | −03:00 |  |
Full History
| From the start of the day | Adopted time zone | Until the end of the day |
|---|---|---|
| 01-05-1920 | −4 | 30-11-1930 |
| 01-12-1930 | −3 | 31-03-1931 |
| 01-04-1931 | −4 | 14-10-1931 |
| 15-10-1931 | −3 | 29-02-1932 |
| 01-03-1932 | −4 | 31-10-1932 |
| 01-11-1932 | −3 | 29-02-1933 |
| 01-03-1933 | −4 | 31-10-1933 |
| 01-11-1933 | −3 | 28-02-1934 |
| 01-03-1934 | −4 | 31-10-1934 |
| 01-11-1934 | −3 | 28-02-1935 |
| 01-03-1935 | −4 | 31-10-1935 |
| 01-11-1935 | −3 | 29-02-1936 |
| 01-03-1936 | −4 | 31-10-1936 |
| 01-11-1936 | −3 | 28-02-1937 |
| 01-03-1937 | −4 | 31-10-1937 |
| 01-11-1937 | −3 | 28-02-1938 |
| 01-03-1938 | −4 | 31-10-1938 |
| 01-11-1938 | −3 | 28-02-1939 |
| 01-03-1939 | −4 | 31-10-1939 |
| 01-11-1939 | −3 | 29-02-1940 |
| 01-03-1940 | −4 | 30-06-1940 |
| 01-07-1940 | −3 | 14-06-1941 |
| 15-06-1941 | −4 | 14-10-1941 |
| 15-10-1941 | −3 | 31-07-1943 |
| 01-08-1943 | −4 | 14-10-1943 |
| 15-10-1943 | −3 | 28-02-1946 |
| 01-03-1946 | −4 | 30-09-1946 |
| 01-10-1946 | −3 | 30-09-1963 |
| 01-10-1963 | −4 | 14-12-1963 |
| 15-12-1963 | −3 | 29-02-1964 |
| 01-03-1964 | −4 | 14-10-1964 |
| 15-10-1964 | −3 | 28-02-1965 |
| 01-03-1965 | −4 | 14-10-1965 |
| 15-10-1965 | −3 | 28-02-1966 |
| 01-03-1966 | −4 | 14-10-1966 |
| 15-10-1966 | −3 | 01-04-1967 |
| 02-04-1967 | −4 | 30-09-1967 |
| 01-10-1967 | −3 | 06-04-1968 |
| 07-04-1968 | −4 | 05-10-1968 |
| 06-10-1968 | −3 | 05-04-1969 |
| 06-04-1969 | −4 | 04-10-1969 |
| 05-10-1969 | −3 | 22-01-1974 |
| 23-01-1974 | −2 | 30-04-1974 |
| 01-05-1974 | −3 | 30-11-1988 |
| 01-12-1988 | −2 | 04-03-1989 |
| 05-03-1989 | −3 | 14-10-1989 |
| 15-10-1989 | −2 | 03-03-1990 |
| 04-03-1990 | −3 | 20-10-1990 |
| 21-10-1990 | −2 | 02-03-1991 |
| 03-03-1991 | −3 | 19-10-1991 |
| 20-10-1991 | −2 | 29-02-1992 |
| 01-03-1992 | −3 | 17-10-1992 |
| 18-10-1992 | −2 | 06-03-1993 |
| 07-03-1993 | −3 | 29-12-2007 |
| 30-12-2007 | −2 | 15-03-2008 |
| 16-03-2008 | −3 | 18-10-2008 |
| 19-10-2008 | −2 | 14-03-2009[b] |
| 15-03-2009 | −3 | until the present |