Time zone · Americas
AST
Argentina Standard Time
Argentina Standard Time covers twelve zones across Argentina, all settled on a steady clock that keeps business, siestas, and evening barbecues on the same schedule year-round without daylight saving disruptions.
Friday, June 5, 2026
Current offset
UTC-03:00
Standard · -03
Daylight saving
Not observed
Year-round standard time
IANA zones
12
None observe daylight saving
DST offset
—
No summer variant
About AST
A fixed, year-round offset.
Argentina Standard Time covers twelve zones across Argentina, all settled on a steady clock that keeps business, siestas, and evening barbecues on the same schedule year-round without daylight saving disruptions.
IANA zones · the technical identifiers
The 12 zones that resolve to AST.
For software, always store the IANA identifier — never the abbreviation alone. The database keeps these zones distinct because their rules can, and historically did, diverge.
Cities currently on AST
The same hour, city by city.
6 cities · all UTC-03:00
Where AST is used
One country.
Same offset · UTC-03:00
Other zones at UTC-03:00 right now.
These named zones share AST's offset today. When daylight saving rules differ, they drift apart for part of the year.
Frequently asked questions
Common questions about AST, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].
- Why doesn’t Argentina change clocks for daylight saving?
- Argentina moved away from daylight saving years ago and kept a single nationwide clock to simplify planning, stabilize energy use, and make cross-country coordination more predictable.
- Is it really the same time from Buenos Aires to Patagonia?
- Yes—cities like Buenos Aires, Córdoba, and Río Gallegos all share the same current offset, so a live video call between them never needs a timezone math check.
- When did Argentina last shift its clocks?
- The country’s most recent daylight-saving adjustments ended in 2009; since then the nationwide offset has remained stable.
- Does Argentina’s lack of daylight saving confuse international meetings?
- Not at all. With no seasonal clock changes, Argentina Standard Time is simpler to track than many northern-hemisphere countries that switch twice a year.
- Can I set my calendar to ‘UTC minus 3’ for all Argentina meetings?
- Usually yes—this region’s zones now observe a consistent offset year-round, though it’s still a good habit to confirm the exact zone in your calendar tool.
- Why does this page show twelve member zones for one country?
- Historically each Argentine province had its own official time zone; now most are unified under the same offset, but the twelve zones remain in the data for backward compatibility and accuracy.
- What does the steady clock mean for daily life in Argentina?
- Sunsets and work hours stay predictable all year, which makes planning dinner, study timetables, and national TV schedules much simpler.
- Is Argentina Standard Time the same as Brasília Time?
- They can overlap now, but their histories differ: Argentina dropped daylight saving while Brazil experimented with it before also simplifying its policy.
- If I’m flying through Argentina, should I worry about a time-change shock?
- Flights within Argentina rarely involve a clock change today; the main timing consideration is aligning with local customs like late lunches and even later dinners instead of adjusting your watch.
Free · Developer API
Time, as JSON.
Every IANA time zone with live offsets, DST status, and the countries and cities that use them — clean, dependable JSON. Sign up free and get an API key in seconds.
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