Buenos Aires to Chicago
-2hBuenos Aires
ARTSOURCEChicago
CDTGreen rows indicate typical business hours (9 AM - 5 PM)
ART and CDT on the World Map
The map below highlights the ART (Argentina Time) and CDT (Central Standard Time) timezone regions across the globe.
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).
CST – Central Standard Time
UTC-06:00Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.
- •CST covers 20 US states fully or partially.
- •Chicago and Houston are the two largest cities in the Central Time Zone.
- •Mexico City, one of the world's most populous cities, operates on CST.
- •CST is 1 hour behind EST and 2 hours ahead of PST.
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.
About Chicago
WikipediaChicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
The Chicago Board of Trade is the world's oldest futures and options exchange.
Everything You Need to Know About Buenos Aires and Chicago Time
Buenos Aires runs on Argentina Standard Time (ART) at UTC-03:00. Chicago runs on Central Daylight Time (CDT) at UTC-05:00, also currently on daylight saving time. That puts Buenos Aires 2 hours behind Chicago — a difference of -2h at the current offsets.
In practice, when it is 9:00 AM in Buenos Aires it is 7:00 AM in Chicago. Midnight in Buenos Aires is 10:00 PM in Chicago.Chicago observes daylight saving time while Buenos Aires does not, so the gap narrows or widens by an hour part of the year.
Buenos Aires to Chicago time conversion table
| Buenos Aires (ART) | Chicago (CDT) | Day |
|---|---|---|
| 12:00 AM | 10:00 PM | previous day |
| 6:00 AM | 4:00 AM | same day |
| 7:00 AM | 5:00 AM | same day |
| 8:00 AM | 6:00 AM | same day |
| 9:00 AM | 7:00 AM | same day |
| 12:00 PM | 10:00 AM | same day |
| 3:00 PM | 1:00 PM | same day |
| 5:00 PM | 3:00 PM | same day |
| 6:00 PM | 4:00 PM | same day |
| 9:00 PM | 7:00 PM | same day |
Why people convert Buenos Aires to Chicago time
- Scheduling a call from Buenos Aires to Chicago: a 10:00 AM start in Buenos Aires lands at 8:00 AM in Chicago, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Buenos Aires and Chicago are inside the 9-to-5 working day between 11:00 AM and 5:00 PM ART time (9:00 AM–3:00 PM CDT). That is roughly 6 hours of usable overlap.
- Coordinating a Buenos Aires-based team with Chicago 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 ART" is unambiguous; "3 PM" across a -2h gap is not.
- Block 11:00 AM–5:00 PM ART as the recurring meeting window if you work primarily from Buenos Aires and need Chicago colleagues present.
- Chicago: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
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.
About CST (Central Standard Time)
Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.
Best time to call between Buenos Aires and Chicago
Both Buenos Aires and Chicago sit inside the 9 AM – 5 PM working day between 11:00 AM–5:00 PM ART, which is 9:00 AM–3:00 PM CDT. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Buenos Aires and Chicago share 6 hours of working-hours overlap (11:00 AM–5:00 PM ART), so scheduling a live meeting is straightforward.
Buenos Aires is 2 hours behind Chicago (ART UTC-03:00 → CDT UTC-05:00). The shared working window is 11:00 AM–5:00 PM ART. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Buenos Aires
Does not observe DST
Chicago
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
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 Buenos Aires and Chicago?
Buenos Aires (ART, UTC-03:00) is 2 hours behind Chicago (CDT, UTC-05:00). The gap is currently -2h.
How do I convert Buenos Aires time to Chicago time?
Add -2h to Buenos Aires local time. For example, 9:00 AM in Buenos Aires is 7:00 AM in Chicago.
What time is it in Chicago right now?
Chicago uses CDT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h offset from Buenos Aires.
What is the best time to call Chicago from Buenos Aires?
Call between 11:00 AM and 5:00 PM ART — that maps to 9:00 AM–3:00 PM CDT and keeps both parties inside the working day.
Which is behind, Buenos Aires or Chicago?
Buenos Aires is 2 hours behind Chicago. When it is 12:00 PM in Buenos Aires it is 10:00 AM in Chicago.
Do Buenos Aires and Chicago use different time zones?
Buenos Aires (Argentina) uses ART at UTC-03:00, while Chicago (USA) uses CDT at UTC-05:00. The IANA identifiers are America/Buenos_Aires and America/Chicago.
Does daylight saving time affect the Buenos Aires–Chicago difference?
Yes at the moment: Chicago is on daylight saving time and Buenos Aires is not, so the -2h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Buenos Aires's time zone?
ART also covers Buenos Aires, Córdoba, Rosario, Mendoza, La Plata, Tucumán.
Which countries use ART, Buenos Aires's zone?
ART is used in Argentina.
Is there a day difference between Buenos Aires and Chicago?
Not normally. The -2h gap only pushes the date over the previous day.
What is the time difference between Buenos Aires and Chicago?
Chicago is -2h from Buenos Aires.
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 timezone is Chicago in?
Chicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
What are the business hours in Buenos Aires?
Standard business hours in Buenos Aires are 9:00 AM - 6:00 PM ART.
What are the business hours in Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
What is the best time to schedule a call between Buenos Aires and Chicago?
The best overlap for a call is when both cities are in business hours. Buenos Aires works 9:00 AM - 6:00 PM ART and Chicago works 8:00 AM - 5:00 PM CST (-2h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Buenos Aires and Chicago?
Buenos Aires uses ARS ($) while Chicago uses USD ($). Check current exchange rates when planning travel or business between these cities.
How do Buenos Aires and Chicago compare in size?
Buenos Aires has a population of approximately 3 million (metro: 15.4 million), while Chicago has approximately 2.7 million (metro: 9.5 million).
What are the major landmarks in Buenos Aires and Chicago?
Buenos Aires is known for Casa Rosada, Teatro Colón, La Boca. Chicago is famous for Willis Tower, Millennium Park, Cloud Gate (The Bean).
Do Buenos Aires and Chicago have stock exchanges?
Yes. Buenos Aires has the BCBA (Buenos Aires Stock Exchange) and Chicago has the CME (Chicago Mercantile Exchange), CBOE. The -2h time difference affects trading hour overlaps between these exchanges.
Which countries use ART (Argentina Time)?
ART is used in Argentina.
Does ART observe daylight saving time?
No, ART does not observe daylight saving time and remains at UTC-03:00 year-round.
What are some interesting facts about ART?
Argentina does not observe daylight saving time. Buenos Aires is one of the most visited cities in South America.
Which cities are in the CST timezone?
Major cities in the CST timezone include Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis.
What is the UTC offset for CST?
Central Standard Time (CST) is at UTC-06:00. During daylight saving time, it shifts to CDT.
What should I know about the CST timezone?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
When is it midnight in Buenos Aires, what time is it in Chicago?
When it is 12:00 AM (midnight) in Buenos Aires (ART), it is -2h later in Chicago (CST).
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