Time difference between Buenos Aires and Chicago
Chicago is 2 hours behind Buenos Aires
Buenos Aires, Argentina is UTC−3 · Chicago, the United States is UTC−6 — on standard time
The gap is not the same all year
Every converter gives one number for this pair. That number is right for most of the year and wrong for part of it, because Buenos Aires does not change its clocks and Chicago goes forward on the second Sunday in March and back on the first Sunday in November.
| Buenos Aires / Chicago clocks | Difference | How long |
|---|---|---|
| standard / summer | 2 hours behind | about 34 weeks — most of the year |
| standard / standard | 3 hours behind | about 18 weeks |
Buenos Aires stays put all year while Chicago moves, so the gap changes twice a year from Chicago's side alone. A recurring meeting set in Buenos Aires's calendar will drift by an hour without anyone touching it.
When they can both be at their desks
Nine-to-five in both cities overlaps for 6 hours — 11:00 AM to 5:00 PM in Buenos Aires, the same moment as 9:00 AM to 3:00 PM in Chicago.
Buenos Aires to Chicago, hour by hour
| Buenos Aires | Chicago |
|---|---|
| 12:00 AM | 10:00 PM (previous day) |
| 1:00 AM | 11:00 PM (previous day) |
| 2:00 AM | 12:00 AM |
| 3:00 AM | 1:00 AM |
| 4:00 AM | 2:00 AM |
| 5:00 AM | 3:00 AM |
| 6:00 AM | 4:00 AM |
| 7:00 AM | 5:00 AM |
| 8:00 AM | 6:00 AM |
| 9:00 AM | 7:00 AM |
| 10:00 AM | 8:00 AM |
| 11:00 AM | 9:00 AM |
| 12:00 PM | 10:00 AM |
| 1:00 PM | 11:00 AM |
| 2:00 PM | 12:00 PM |
| 3:00 PM | 1:00 PM |
| 4:00 PM | 2:00 PM |
| 5:00 PM | 3:00 PM |
| 6:00 PM | 4:00 PM |
| 7:00 PM | 5:00 PM |
| 8:00 PM | 6:00 PM |
| 9:00 PM | 7:00 PM |
| 10:00 PM | 8:00 PM |
| 11:00 PM | 9:00 PM |
On the usual gap of 2 hours.
Frequently asked questions
What is the time difference between Buenos Aires and Chicago?
Chicago is 2 hours behind Buenos Aires for most of the year. It is not the same all year — there is one other gap, because Buenos Aires does not change its clocks and Chicago goes forward on the second Sunday in March and back on the first Sunday in November.
Is Chicago ahead of Buenos Aires?
No — Chicago is 2 hours behind. Buenos Aires is UTC−3 and Chicago is UTC−6 on standard time.
What time is 9 AM in Buenos Aires in Chicago?
7:00 AM, on the usual gap.
When can Buenos Aires and Chicago meet?
Standard nine-to-five hours overlap for 6 hours: 11:00 AM–5:00 PM in Buenos Aires, which is 9:00 AM–3:00 PM in Chicago.
Other pairs
- Buenos Aires to Mexico City
- Buenos Aires to Denver
- Buenos Aires to Los Angeles
- Buenos Aires to Vancouver
- Buenos Aires to Anchorage
- Buenos Aires to Honolulu
- Buenos Aires to Lima
- Buenos Aires to Lagos
- Buenos Aires to Johannesburg
- Buenos Aires to Nairobi
Every Buenos Aires pair · Every Chicago pair · All city pairs · Time zones by abbreviation