Convert Sydney time to Buenos Aires time

Hour by hour

Every hour of a day in Sydney, and what the clock reads in Buenos Aires at that same moment.

Daylight saving time

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

When you can actually talk

There is no hour where both cities are inside a 09:00–18:00 working day. Someone has to move — the nearest workable windows are below.

• Sydney 10:00–18:00Buenos Aires 21:00–05:00
• Sydney 22:00–07:00Buenos Aires 09:00–18:00

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 Sydney and Buenos Aires?

Buenos Aires is 13 hours behind Sydney. 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 Sydney?

There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.

Does Sydney observe daylight saving time?

Yes. Sydney runs on UTC+10 in winter and UTC+11 in summer. The next change is on 2026-10-04, when clocks go forward 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 Sydney, what time is it in Buenos Aires?

It is 23:00 in Buenos Aires, still on the previous day. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.

Which time zones do Sydney and Buenos Aires use?

Sydney uses Australia/Sydney, currently UTC+10 (AEST), 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.