Buenos Aires zone
GMT-3 (GMT-3)
Chicago zone
CDT (GMT-5)
Difference
2 hours behind Buenos Aires
Business overlap
6h (9-5 windows)
Working hours overlap
Each cell is one hour in Buenos Aires. Filled cells mark when 9 AM – 5 PM in Buenos Aires and Chicago both apply.
6 hours per day
- Buenos Aires
- GMT-3
- Chicago
- GMT-5
- Difference
- -2h
- Business overlap
- 6h
Hour-by-hour conversion
Each row shows the matching local time in Chicago for an hour in Buenos Aires.
| Buenos Aires | Chicago | Day | Window |
|---|---|---|---|
| 12:00 AM | 10:00 PM | previous day | — |
| 1:00 AM | 11:00 PM | previous day | — |
| 2:00 AM | 12:00 AM | same day | — |
| 3:00 AM | 1:00 AM | same day | — |
| 4:00 AM | 2:00 AM | same day | — |
| 5:00 AM | 3:00 AM | same 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 | — |
| 10:00 AM | 8:00 AM | same day | — |
| 11:00 AM | 9:00 AM | same day | Both 9-5 |
| 12:00 PM | 10:00 AM | same day | Both 9-5 |
| 1:00 PM | 11:00 AM | same day | Both 9-5 |
| 2:00 PM | 12:00 PM | same day | Both 9-5 |
| 3:00 PM | 1:00 PM | same day | Both 9-5 |
| 4:00 PM | 2:00 PM | same day | Both 9-5 |
| 5:00 PM | 3:00 PM | same day | — |
| 6:00 PM | 4:00 PM | same day | — |
| 7:00 PM | 5:00 PM | same day | — |
| 8:00 PM | 6:00 PM | same day | — |
| 9:00 PM | 7:00 PM | same day | — |
| 10:00 PM | 8:00 PM | same day | — |
| 11:00 PM | 9:00 PM | same day | — |
Best meeting windows
If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 11:00 AM – 5:00 PM in Buenos Aires 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 Buenos Aires time to Chicago time
Buenos Aires follows the America/Argentina/Buenos_Aires time zone (currently GMT-3, GMT-3), while Chicago follows America/Chicago (currently CDT, GMT-5). Chicago is 2 hours behind Buenos Aires 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
Buenos Aires
Does not observe daylight saving time.
Chicago
- Spring forward · Sunday, March 8, 2026
- Fall back · Sunday, November 1, 2026
Reverse this conversion
Chicago to Buenos Aires
Open the converter
Plan a meeting between Buenos Aires and Chicago
More conversions from Buenos Aires
Frequently asked questions
- How many hours is Buenos Aires from Chicago?
- Chicago is 2 hours behind Buenos Aires right now.
- What time is 9:00 AM Buenos Aires in Chicago?
- 9:00 AM in Buenos Aires is 7:00 AM in Chicago.
- What time is 5:00 PM Buenos Aires in Chicago?
- 5:00 PM in Buenos Aires is 3:00 PM in Chicago.
- When do Buenos Aires and Chicago business hours overlap?
- Standard 9 AM - 5 PM working hours overlap for about 6 hours, roughly from 11:00 AM to 5:00 PM in Buenos Aires time.
- Does daylight saving time change the difference between Buenos Aires and Chicago?
- 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 Buenos Aires
Local time page
Time in Chicago