Convert London time to Buenos Aires time

Hour by hour

The whole day mapped across: read down the left for London, across for Buenos Aires.

Daylight saving time

Buenos Aires keeps one offset all year while London moves twice. That is the whole reason this difference is seasonal.

When you can actually talk

You have 5 hours of shared working time: 13:00–18:00 in London, which is 09:00–14:00 in Buenos Aires.

• London 13:00–18:00Buenos Aires 09:00–14:00

Reference

The underlying data, in case you need to put it in a calendar invitation or a configuration file.

Example, not the current time. Live times appear once the page loads.

Common questions

What is the time difference between London and Buenos Aires?

Buenos Aires is 4 hours behind London. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.

When is the best time to call Buenos Aires from London?

Between 13:00–18:00 in London, which is 09:00–14:00 in Buenos Aires. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does London observe daylight saving time?

Yes. London runs on UTC+0 in winter and UTC+1 in summer. The next change is on 2026-10-25, when clocks go back by 60 minutes.

Does Buenos Aires observe daylight saving time?

No. Buenos Aires stays on UTC-3 all year, so its clocks never move.

If it is midday in London, what time is it in Buenos Aires?

It is 08:00 in Buenos Aires, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.

Which time zones do London and Buenos Aires use?

London uses Europe/London, currently UTC+1 (BST), and Buenos Aires uses America/Argentina/Buenos_Aires, currently UTC-3. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.