Argentina’s time zoneArgentina uses one time zone, UTC−3. Buenos Aires, Córdoba, Mendoza, Salta and Ushuaia share the same time. The country does not currently observe daylight saving time.

What time zone does Argentina use?

Argentina’s official time is three hours behind Coordinated Universal Time. When it is 12:00 UTC, it is 09:00 in Argentina. This offset remains the same in every season.

Official timeUTC−3

Hora Oficial Argentina applies throughout the country.

From north to southThe same time

Salta, Buenos Aires and Ushuaia share one time.

Throughout the yearNo clock changes

The offset stays at UTC−3 in winter and summer.

Map of Argentina’s time zone

The map shows mainland Argentina and the Argentine part of Tierra del Fuego in one colour: the time zone is UTC−3. The cities marked on the map help you follow a trip from north to south without suggesting different time zones.

Map of Argentina with one UTC−3 time zone and the cities of Buenos Aires, Córdoba, Mendoza and Ushuaia
One time for mainland Argentina and Argentine Tierra del Fuego. Boundaries and coastlines are simplified; the points mark reference cities. Cartography: Natural Earth, public domain. Adaptation by UniqueVisitor. Terms of use.

The same time from Buenos Aires to Patagonia

An itinerary taking in Buenos Aires, Mendoza, Iguazú Falls and Patagonia does not require any clock adjustments. Distances and daylight hours vary greatly, especially as you head south towards Ushuaia, but civil time remains the same.

Which time zone should you choose on your phone?

For Buenos Aires, the IANA identifier is America/Argentina/Buenos_Aires, used by the clock above. The database also includes identifiers such as America/Argentina/Mendoza and America/Argentina/Ushuaia: they preserve different local histories of clock changes, but all currently return UTC−3. Choose your destination city on your phone and calendar when available.

Daylight saving time in Argentina: the annual rule

Argentina does not currently observe daylight saving time and has no seasonal clock changes. In Buenos Aires, the last daylight saving season ended in March 2009; the current time is UTC−3 throughout the year. Clock changes have not always been applied uniformly across the provinces.

Winter and summerAlways UTC−3

Official time stays the same in both seasons.

Seasonal clock changeNo adjustment

There are no annual dates for moving the clocks forward or back.

Frequently asked questions about Argentina’s time zone

How many time zones does Argentina have?

Argentina uses one time zone, UTC−3. Buenos Aires, Córdoba, Mendoza, Salta and Ushuaia share the same time.

Does Argentina observe daylight saving time?

Argentina does not currently observe daylight saving time: it keeps UTC−3 throughout the year, without seasonal clock changes.

Do Buenos Aires and Ushuaia have the same time?

Buenos Aires and Ushuaia share the same time, UTC−3. Travelling to Patagonia and Argentine Tierra del Fuego does not require a time zone change.

Sources

To find the time in other cities, see the time zone guide.