Buenos Aires to Chicago, IL: time difference
Chicago, IL is 2 h behind Buenos Aires. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Buenos Aires 23:51 11:51 PM Chicago, IL 21:51 9:51 PM You –:–
23:51 11:51 PM
Argentina Standard Time · UTC-3
☀️ 06:20 · 🌙 19:03
21:51 9:51 PM
Central Daylight Time · UTC-5
☀️ 06:57 · 🌙 18:20
·
−2 h
Chicago, IL is 2 h behind Buenos Aires.
When you, Buenos Aires and Chicago, IL are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇦🇷 Buenos Aires
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇺🇸 Chicago, IL
22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇦🇷 Buenos Aires | 🇺🇸 Chicago, IL |
|---|---|---|
| Local time | 23:51 | 21:51 |
| Local date | Friday, October 9, 2026 | Friday, October 9, 2026 |
| Time zone | Argentina Standard Time | Central Daylight Time |
| UTC offset | UTC-3 | UTC-5 |
| Offset from Buenos Aires | — | −2 h |
| IANA zone | America/Argentina/Buenos Aires | America/Chicago |
| Daylight saving | Not observed | On summer time → UTC-6, Nov 1, 01:00 |
| Sunrise | 06:20 | 06:57 |
| Sunset | 19:03 | 18:20 |
| Daylight | 12 h 43 min | 11 h 24 min |
| People on this clock | 2,891,082 | 2,746,388 |
Compare Buenos Aires with another city
More comparisons with Buenos Aires: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Buenos Aires and Chicago, IL: common questions
How many hours behind Buenos Aires is Chicago, IL?
The clocks in Chicago are 2 hours behind those in Buenos Aires (UTC−5 and UTC−3).
What time is it in Chicago, IL, when it is 9:00 AM in Buenos Aires?
When it is 9:00 AM in Buenos Aires, it is 7:00 AM in Chicago.
What time is it in Chicago, IL, when it is 6:00 PM in Buenos Aires?
When it is 6:00 PM in Buenos Aires, it is 4:00 PM in Chicago.
When do working hours in Buenos Aires and in Chicago, IL, overlap?
Working hours (9:00 AM–6:00 PM) overlap from 11:00 AM to 6:00 PM in Buenos Aires, which is 9:00 AM to 4:00 PM in Chicago.
When is it still the previous day in Chicago, IL?
Until 2:00 AM in Buenos Aires it is still the previous day in Chicago. The other way round, from 10:00 PM in Chicago it is already the next day in Buenos Aires.
Does the time difference between Buenos Aires and Chicago, IL, change?
Yes. The clocks change only in Chicago. From November 1, 2026, Chicago will be 3 hours behind Buenos Aires.
