Time in Argentina

Argentina is located at a longitude that would naturally put it in the or time zone; however, it actually uses the 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 maintains the official national time.

History

The first official standardization of time in Argentina took place on 31 October 1894, with establishment of as the nation's standard time. From 1920 to 1969, the official time switched biannually between UTC−04:00 as standard time in winter and as daylight saving time in summer. From 1974 to 1993, clocks advanced again, such that the official time switched biannually between UTC−03:00 as winter DST and as summer double DST. In 1993, the national time was fixed at , called Argentina Time (ART; ). 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).

IANA time zone database

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

Full History

Notes

References

• 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

• Husos Horarios Adoptados en la República Argentina - Servicio de Hidrografía Naval, Ministerio de Defensa