Chicago zone
CDT (GMT-5)
Buenos Aires zone
GMT-3 (GMT-3)
Difference
2 hours ahead of Chicago
Business overlap
6h (9-5 windows)
Working hours overlap
Each cell is one hour in Chicago. Filled cells mark when 9 AM – 5 PM in Chicago and Buenos Aires both apply.
6 hours per day
- Chicago
- GMT-5
- Buenos Aires
- GMT-3
- Difference
- +2h
- Business overlap
- 6h
Hour-by-hour conversion
Each row shows the matching local time in Buenos Aires for an hour in Chicago.
| Chicago | Buenos Aires | Day | Window |
|---|---|---|---|
| 12:00 AM | 2:00 AM | same day | — |
| 1:00 AM | 3:00 AM | same day | — |
| 2:00 AM | 4:00 AM | same day | — |
| 3:00 AM | 5:00 AM | same day | — |
| 4:00 AM | 6:00 AM | same day | — |
| 5:00 AM | 7:00 AM | same day | — |
| 6:00 AM | 8:00 AM | same day | — |
| 7:00 AM | 9:00 AM | same day | — |
| 8:00 AM | 10:00 AM | same day | — |
| 9:00 AM | 11:00 AM | same day | Both 9-5 |
| 10:00 AM | 12:00 PM | same day | Both 9-5 |
| 11:00 AM | 1:00 PM | same day | Both 9-5 |
| 12:00 PM | 2:00 PM | same day | Both 9-5 |
| 1:00 PM | 3:00 PM | same day | Both 9-5 |
| 2:00 PM | 4:00 PM | same day | Both 9-5 |
| 3:00 PM | 5:00 PM | same day | — |
| 4:00 PM | 6:00 PM | same day | — |
| 5:00 PM | 7:00 PM | same day | — |
| 6:00 PM | 8:00 PM | same day | — |
| 7:00 PM | 9:00 PM | same day | — |
| 8:00 PM | 10:00 PM | same day | — |
| 9:00 PM | 11:00 PM | same day | — |
| 10:00 PM | 12:00 AM | next day | — |
| 11:00 PM | 1:00 AM | next day | — |
Best meeting windows
If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 9:00 AM – 3:00 PM in Chicago time. That gives you 6 hours per workday for live meetings.
Tighter overlap is achievable by having the side with later working hours start earlier, or by treating the first and last hours of each side as flexible. The bar above marks every hour where both cities sit inside a 9 AM – 5 PM window.
About converting Chicago time to Buenos Aires time
Chicago follows the America/Chicago time zone (currently CDT, GMT-5), while Buenos Aires follows America/Argentina/Buenos_Aires (currently GMT-3, GMT-3). Buenos Aires is 2 hours ahead of Chicago right now.
Chicago observes daylight saving time, while Buenos Aires does not. The offset between the two cities changes by one hour at the daylight saving transitions.
Daylight saving transitions in 2026
Chicago
- Spring forward · Sunday, March 8, 2026
- Fall back · Sunday, November 1, 2026
Buenos Aires
Does not observe daylight saving time.
Reverse this conversion
Buenos Aires to Chicago
Open the converter
Plan a meeting between Chicago and Buenos Aires
More conversions from Chicago
Frequently asked questions
- How many hours is Chicago from Buenos Aires?
- Buenos Aires is 2 hours ahead of Chicago right now.
- What time is 9:00 AM Chicago in Buenos Aires?
- 9:00 AM in Chicago is 11:00 AM in Buenos Aires.
- What time is 5:00 PM Chicago in Buenos Aires?
- 5:00 PM in Chicago is 7:00 PM in Buenos Aires.
- When do Chicago and Buenos Aires business hours overlap?
- Standard 9 AM - 5 PM working hours overlap for about 6 hours, roughly from 9:00 AM to 3:00 PM in Chicago time.
- Does daylight saving time change the difference between Chicago and Buenos Aires?
- Chicago observes daylight saving time while Buenos Aires does not, so the offset between them changes by one hour twice a year.
Local time page
Time in Chicago
Local time page
Time in Buenos Aires