London zone
GMT+1 (GMT+1)
Buenos Aires zone
GMT-3 (GMT-3)
Difference
4 hours behind London
Business overlap
4h (9-5 windows)
Working hours overlap
Each cell is one hour in London. Filled cells mark when 9 AM – 5 PM in London and Buenos Aires both apply.
4 hours per day
- London
- GMT+1
- Buenos Aires
- GMT-3
- Difference
- -4h
- Business overlap
- 4h
Hour-by-hour conversion
Each row shows the matching local time in Buenos Aires for an hour in London.
| London | Buenos Aires | Day | Window |
|---|---|---|---|
| 12:00 AM | 8:00 PM | previous day | — |
| 1:00 AM | 9:00 PM | previous day | — |
| 2:00 AM | 10:00 PM | previous day | — |
| 3:00 AM | 11:00 PM | previous day | — |
| 4:00 AM | 12:00 AM | same day | — |
| 5:00 AM | 1:00 AM | same day | — |
| 6:00 AM | 2:00 AM | same day | — |
| 7:00 AM | 3:00 AM | same day | — |
| 8:00 AM | 4:00 AM | same day | — |
| 9:00 AM | 5:00 AM | same day | — |
| 10:00 AM | 6:00 AM | same day | — |
| 11:00 AM | 7:00 AM | same day | — |
| 12:00 PM | 8:00 AM | same day | — |
| 1:00 PM | 9:00 AM | same day | Both 9-5 |
| 2:00 PM | 10:00 AM | same day | Both 9-5 |
| 3:00 PM | 11:00 AM | same day | Both 9-5 |
| 4:00 PM | 12:00 PM | same day | Both 9-5 |
| 5:00 PM | 1:00 PM | same day | — |
| 6:00 PM | 2:00 PM | same day | — |
| 7:00 PM | 3:00 PM | same day | — |
| 8:00 PM | 4:00 PM | same day | — |
| 9:00 PM | 5:00 PM | same day | — |
| 10:00 PM | 6:00 PM | same day | — |
| 11:00 PM | 7:00 PM | same day | — |
Best meeting windows
If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 1:00 PM – 5:00 PM in London time. That gives you 4 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 London time to Buenos Aires time
London follows the Europe/London time zone (currently GMT+1, GMT+1), while Buenos Aires follows America/Argentina/Buenos_Aires (currently GMT-3, GMT-3). Buenos Aires is 4 hours behind London right now.
London 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
London
- Spring forward · Sunday, March 29, 2026
- Fall back · Sunday, October 25, 2026
Buenos Aires
Does not observe daylight saving time.
Reverse this conversion
Buenos Aires to London
Open the converter
Plan a meeting between London and Buenos Aires
More conversions from London
Frequently asked questions
- How many hours is London from Buenos Aires?
- Buenos Aires is 4 hours behind London right now.
- What time is 9:00 AM London in Buenos Aires?
- 9:00 AM in London is 5:00 AM in Buenos Aires.
- What time is 5:00 PM London in Buenos Aires?
- 5:00 PM in London is 1:00 PM in Buenos Aires.
- When do London and Buenos Aires business hours overlap?
- Standard 9 AM - 5 PM working hours overlap for about 4 hours, roughly from 1:00 PM to 5:00 PM in London time.
- Does daylight saving time change the difference between London and Buenos Aires?
- London 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 London
Local time page
Time in Buenos Aires