AST to Buenos Aires
+1hAST
ASTSOURCEBuenos Aires
ARTGreen rows indicate typical business hours (9 AM - 5 PM)
AST and ART on the World Map
The map below highlights the AST (Atlantic Standard Time) and ART (Argentina Time) timezone regions across the globe.
AST – Atlantic Standard Time
UTC-04:00Atlantic Standard Time (AST) is the time zone for the Canadian Atlantic provinces and the Caribbean, 4 hours behind UTC.
- •Puerto Rico uses AST year-round and does not observe DST.
- •AST is 1 hour ahead of EST.
- •Halifax, the capital of Nova Scotia, is the largest city in AST Canada.
ART – Argentina Time
UTC-03:00Argentina Time (ART) is the standard time for Argentina, 3 hours behind UTC.
- •Argentina does not observe daylight saving time.
- •Buenos Aires is one of the most visited cities in South America.
- •ART is the same offset as BRT (UTC-03:00).
About Buenos Aires
WikipediaBuenos Aires operates on Argentina Time (ART), UTC-3. As South America's most European city, Buenos Aires coordinates with Brazilian markets in the same timezone.
The Teatro Colón is considered one of the best opera houses in the world for acoustics.
Comparing Time Zones: AST and Buenos Aires
AST runs on Atlantic Standard Time (AST) at UTC-04:00. Buenos Aires runs on Argentina Standard Time (ART) at UTC-03:00. That puts AST 1 hour ahead of Buenos Aires — a difference of +1h at the current offsets.
In practice, when it is 9:00 AM in AST it is 10:00 AM in Buenos Aires. Midnight in AST is 1:00 AM in Buenos Aires. Neither zone observes daylight saving time, so the offset between them stays constant all year.
AST to Buenos Aires time conversion table
| AST (AST) | Buenos Aires (ART) | Day |
|---|---|---|
| 12:00 AM | 1:00 AM | same day |
| 6:00 AM | 7:00 AM | same day |
| 7:00 AM | 8:00 AM | same day |
| 8:00 AM | 9:00 AM | same day |
| 9:00 AM | 10:00 AM | same day |
| 12:00 PM | 1:00 PM | same day |
| 3:00 PM | 4:00 PM | same day |
| 5:00 PM | 6:00 PM | same day |
| 6:00 PM | 7:00 PM | same day |
| 9:00 PM | 10:00 PM | same day |
Why people convert AST to Buenos Aires time
- Scheduling a call from AST to Buenos Aires: a 10:00 AM start in AST lands at 11:00 AM in Buenos Aires, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both AST and Buenos Aires are inside the 9-to-5 working day between 9:00 AM and 4:00 PM AST time (10:00 AM–5:00 PM ART). That is roughly 7 hours of usable overlap.
- Coordinating a AST-based team with Buenos Aires contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM AST" is unambiguous; "3 PM" across a +1h gap is not.
- Block 9:00 AM–4:00 PM AST as the recurring meeting window if you work primarily from AST and need Buenos Aires colleagues present.
About AST (Atlantic Standard Time)
Atlantic Standard Time (AST) covers Canada's Atlantic provinces (Nova Scotia, New Brunswick, Prince Edward Island, and most of Labrador), as well as several Caribbean nations. Puerto Rico and the US Virgin Islands use AST year-round without daylight saving time. The Canadian provinces switch to Atlantic Daylight Time (ADT) in summer.
About ART (Argentina Time)
Argentina Time (ART) is the time zone used throughout Argentina. Argentina does not observe daylight saving time. ART shares the same offset as Brasilia Time (BRT) and Uruguay's UYT.
Best time to call between AST and Buenos Aires
Both AST and Buenos Aires sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM AST, which is 10:00 AM–5:00 PM ART. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
AST and Buenos Aires share 7 hours of working-hours overlap (9:00 AM–4:00 PM AST), so scheduling a live meeting is straightforward.
AST is 1 hour ahead of Buenos Aires (AST UTC-04:00 → ART UTC-03:00). The shared working window is 9:00 AM–4:00 PM AST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
AST
☀ Currently in DST
Standard: UTC-04:00 · DST: UTC-03:00
Clocks fall back on Sun, Nov 1, 2026
Buenos Aires
Does not observe DST
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between AST and Buenos Aires?
AST (AST, UTC-04:00) is 1 hour ahead of Buenos Aires (ART, UTC-03:00). The gap is currently +1h.
How do I convert AST time to Buenos Aires time?
Add +1h to AST local time. For example, 9:00 AM in AST is 10:00 AM in Buenos Aires.
What time is it in Buenos Aires right now?
Buenos Aires uses ART at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h offset from AST.
What is the best time to call Buenos Aires from AST?
Call between 9:00 AM and 4:00 PM AST — that maps to 10:00 AM–5:00 PM ART and keeps both parties inside the working day.
Which is ahead, AST or Buenos Aires?
AST is 1 hour ahead of Buenos Aires. When it is 12:00 PM in AST it is 1:00 PM in Buenos Aires.
Do AST and Buenos Aires use different time zones?
AST uses AST at UTC-04:00, while Buenos Aires (Argentina) uses ART at UTC-03:00. The IANA identifiers are America/Halifax and America/Buenos_Aires.
Does daylight saving time affect the AST–Buenos Aires difference?
Neither zone observes daylight saving time, so the +1h offset between AST and Buenos Aires is fixed all year.
Which other cities share AST's time zone?
AST also covers Halifax, San Juan, Santo Domingo, Caracas, La Paz, Fredericton, Charlottetown.
Which countries use AST, AST's zone?
AST is used in Canada (Atlantic provinces), Puerto Rico, US Virgin Islands, Dominican Republic, Venezuela, Bolivia, Barbados, Trinidad and Tobago.
Is there a day difference between AST and Buenos Aires?
Not normally. The +1h gap only pushes the date over for late-evening times.
What is the time difference between AST and Buenos Aires?
Buenos Aires is +1h from AST.
What timezone is AST in?
AST operates on its local timezone.
What timezone is Buenos Aires in?
Buenos Aires operates on Argentina Time (ART), UTC-3. As South America's most European city, Buenos Aires coordinates with Brazilian markets in the same timezone.
What are the business hours in Buenos Aires?
Standard business hours in Buenos Aires are 9:00 AM - 6:00 PM ART.
Which countries use AST (Atlantic Standard Time)?
AST is used in Canada (Atlantic provinces), Puerto Rico, US Virgin Islands, Dominican Republic, Venezuela, Bolivia, and 2 more countries.
Does AST observe daylight saving time?
Yes, AST switches to ADT during summer months.
What are some interesting facts about AST?
Puerto Rico uses AST year-round and does not observe DST. AST is 1 hour ahead of EST.
Which cities are in the ART timezone?
Major cities in the ART timezone include Buenos Aires, Córdoba, Rosario, Mendoza, La Plata, Tucumán.
What is the UTC offset for ART?
Argentina Time (ART) is at UTC-03:00.
What should I know about the ART timezone?
Argentina does not observe daylight saving time. Buenos Aires is one of the most visited cities in South America.
When is it midnight in AST, what time is it in Buenos Aires?
When it is 12:00 AM (midnight) in AST (AST), it is +1h later in Buenos Aires (ART).
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See every conversion from AST →·See every conversion from Buenos Aires →