Time in Argentina

Argentina is located at a longitude that would naturally put it in the UTC−4 or UTC−5 time zone, but it actually uses the UTC−3 time zone. Argentina determines whether to observe daylight saving time on a year-by-year basis, and individual provinces may opt out of the federal decision. At present, Argentina does not observe daylight saving time.[1]

The Argentine Hydrographic Service[2] maintains the official national time.


Historically, some or all of Argentina has observed daylight saving time during austral summer 1989–1990 through austral summer 1992–1993, and again in 2007−2009.[3]

The first official standardization took place on 25 September 1894.[4]

The official time switched between UTC−4 and UTC−3 from 1920 to 1969,[5] and then between UTC−3 and UTC−2 from 1974 to 1993.[6] On 7 March 1993 it was fixed at UTC−3, called Argentina Time (ART)[7][8]

IANA time zone database

In the file zone.tab of the IANA time zone database Argentina has the following zones:

  1. America/Argentina/Buenos Aires – Buenos Aires (BA, CF)
  2. America/Argentina/Cordoba – most locations (CD, CC, CR, ER, FO, MN, SE, SF)
  3. America/Argentina/Salta (SA, LP, NQ, RN)
  4. America/Argentina/Jujuy – Jujuy (JY)
  5. America/Argentina/Tucuman – Tucuman (TM)
  6. America/Argentina/Catamarca – Catamarca (CT), Chubut (CH)
  7. America/Argentina/La Rioja – La Rioja (LR)
  8. America/Argentina/San Juan – San Juan (SJ)
  9. America/Argentina/Mendoza – Mendoza (MZ)
  10. America/Argentina/San Luis – San Luis (SL)
  11. America/Argentina/Rio Gallegos – Santa Cruz (SC)
  12. America/Argentina/Ushuaia – Tierra del Fuego (TF)


External links

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