TIME ZONE CONVERTER
Buenos Aires to London
Time Converter
Convert Buenos Aires, Argentina to London, United Kingdom. Compare dates, seasonal differences and meeting hours.
Buenos Aires is 3h or 4h behind London in 2026, depending on the date.
9 AM Buenos Aires = 12 PM London
Selected date: November 11, 2026.
THE QUICK REFERENCE
CSVBuenos Aires to London conversion table
November 11, 2026 · Date changes are marked.
View the full 24-hour table
| Buenos Aires | London |
|---|---|
| 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 |
| Buenos Aires | London |
|---|---|
| 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 | 12:00 AM +1 day |
| 10:00 PM | 1:00 AM +1 day |
| 11:00 PM | 2:00 AM +1 day |
Starting with the London working day
These examples start on 2026-11-11 in London.
09:00 London06:00 →Buenos Aires · 2026-11-11
17:00 London14:00 →Buenos Aires · 2026-11-11
ONE CLOCK TIME. THE WHOLE YEAR.
Year CSV09:00 Buenos Aires to London throughout 2026
Keeping 09:00 on the Buenos Aires clock produces 2 different destination clock/date answers in 2026. The ranges below use Buenos Aires calendar dates, including transition days.
| Dates in Buenos Aires · 2026 | London answer | Source → destination offsets | Explore |
|---|---|---|---|
| Jan 1 – Mar 2887 dates | 12:00Same date | UTC−03:00 → UTC | |
| Mar 29 – Oct 24210 dates | 13:00Same date | UTC−03:00 → UTC+01:00 | |
| Oct 25 – Dec 3168 dates | 12:00Same date | UTC−03:00 → UTC |
Every calendar date is included, not just workdays. Date ranges include both endpoints. Based on IANA 2026e; future rules may change.
DON’T LOSE A DAY
When does Buenos Aires time become a different date in London?
Your complete source day: 2026-11-11. Each range shows which destination date to use.
Buenos Aires · 2026-11-1100:00–21:00UTC−03:00
London · 2026-11-1103:00–24:00UTC Same date
Buenos Aires · 2026-11-1121:00–24:00UTC−03:00
London · 2026-11-1200:00–03:00UTC Next day
Range starts are included; ends are excluded. 24:00 means midnight at the end of that date. Repeated hours appear separately with their UTC offsets. The strip is proportional to elapsed time.
THE BIGGER PICTURE
2026A year of time differences.
How London compares with Buenos Aires throughout 2026.
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+3h
+4h
+3h
London changes its UTC offset in 2026. Buenos Aires keeps one UTC offset this year.
See exact change periods
| From (UTC, inclusive) | Until (UTC, exclusive) | London vs Buenos Aires |
|---|---|---|
| 1 Jan 2026, 00:00 UTC | 29 Mar 2026, 01:00 UTC | 3h ahead |
| 29 Mar 2026, 01:00 UTC | 25 Oct 2026, 01:00 UTC | 4h ahead |
| 25 Oct 2026, 01:00 UTC | 1 Jan 2027, 00:00 UTC | 3h ahead |
CLOCK CHANGES
What changes at the next clock adjustment?
Exact periods outside the most common difference in 2026
The most frequent difference has London 4h ahead relative to Buenos Aires. Exceptions:
| From (UTC, inclusive) | Until (UTC, exclusive) | Compared with Buenos Aires |
|---|---|---|
| 1 Jan 2026, 00:00 UTC | 29 Mar 2026, 01:00 UTC | 3h ahead |
| 25 Oct 2026, 01:00 UTC | 1 Jan 2027, 00:00 UTC | 3h ahead |
PLAN BEYOND A SINGLE DAY
Daily CSVBuenos Aires–London working hours through 2026
Every date calculated with your working windows. 261 selected Buenos Aires workdays; public holidays are not applied.
Least shared time4h
Most common4h
Most shared time5h
Days without a 60-min slot0 / 261
A start time that survives the whole year.
Start a 60-minute meeting in Buenos Aires 09:00–12:00.
These starts fit both working windows on every selected Buenos Aires workday in 2026, using a 15-minute start grid. The end of each range is the last valid start.
Buenos Aires: 09:00–17:00, Mon, Tue, Wed, Thu, Fri. London: 09:00–17:00, Mon, Tue, Wed, Thu, Fri.
Calculation details and repeated hours
Overnight shifts belong to their start weekday. Host workday means the source calendar date. Repeated local times use the first occurrence.
TWO PLACES. ONE CONNECTION.
≈ 11,129 km apartAcross the map. Across the clock.
City-center coordinates. Distance is an approximate great-circle distance, not a flight route.
THE DETAILS THAT MATTER
Buenos Aires to London: useful answers
Why is the Buenos Aires to London difference sometimes 3 hours and sometimes 4 hours?
Buenos Aires is 3h or 4h behind London in 2026, depending on the date. London changes its UTC offset in 2026. Buenos Aires keeps one UTC offset this year.
Does the Buenos Aires–London time difference change in 2026?
The published rules produce 3 periods with 2 different offsets in 2026. See the annual chart for the exact boundaries of each period.
Does this conversion change the calendar date?
09:00 in Buenos Aires on 2026-11-11 is 12:00 in London on 2026-11-11. This selected time stays on the same date in both places. Other times can cross midnight.
Can Buenos Aires and London meet during working hours?
Your selected working windows share 5h on 2026-11-11. The planner above checks the whole meeting duration and shows suitable start times. Edit the windows to match your team.
Related time-zone meanings and conversions
Choose the question you need answered
Calculated with IANA 2026e. Working hours are your preferences; public holidays and calendar availability are not included. Our methodology