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Time zones used by Argentina
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.
The
Argentine Hydrographic Service
[1]
maintains the official national time.
History
[
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]
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 DDST) resumed; in 2009, this was replaced again with year-round UTC?3:00 (permanent DST).
[7]
IANA time zone database
[
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]
In the file
zone.tab
of the
IANA time zone database
Argentina has the following zones:
- America/Argentina/Buenos_Aires ? Buenos Aires (BA, CF)
- America/Argentina/Cordoba ? most locations (CD, CC, CR, ER, FO, MN, SF)
- America/Argentina/Salta (SA, LP, NQ, RN)
- America/Argentina/Jujuy ? Jujuy (JY)
- America/Argentina/Tucuman ? Tucuman (TM)
- America/Argentina/Catamarca ? Catamarca (CT), Chubut (CH)
- America/Argentina/La Rioja ? La Rioja (LR)
- America/Argentina/San Juan ? San Juan (SJ)
- America/Argentina/Mendoza ? Mendoza (MZ)
- America/Argentina/San Luis ? San Luis (SL)
- America/Argentina/Rio Gallegos ? Santa Cruz (SC)
- America/Argentina/Ushuaia ? Tierra del Fuego (TF)
- America/Argentina/Santiago_del_Estero (SE)
References
[
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]
- tz database
? The tz database contains an extensive history of time zone and daylight saving time changes, with references to official sources for changes to time zones, for Argentina and the rest of the world.
External links
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