What time is it in Buenos Aires when it's 9 AM in São Paulo?

9:00 AM — as of 6 October 2026. Buenos Aires and São Paulo are on the same time.

What's the best time for a call between São Paulo and Buenos Aires?

Between 09:00 and 17:00 São Paulo time, when both cities are in working hours (09:00–17:00).

What time zones are São Paulo and Buenos Aires in?

São Paulo uses America/Sao_Paulo (UTC−3 today); Buenos Aires uses America/Argentina/Buenos_Aires (UTC−3 today).

Time difference between São Paulo and Buenos Aires

Buenos Aires and São Paulo are on the same time. When it's 9:00 in São Paulo, it's 09:00 in Buenos Aires.

From

Buenos Aires and São Paulo are on the same time.

On Tuesday, 6 October 2026, 09:00 in São Paulo is 09:00 in Buenos Aires. São Paulo is UTC−3; Buenos Aires is UTC−3.

The gap through 2026

It stays 0 minutes all year — neither city changes its clocks against the other.

São Paulo to Buenos Aires, hour by hour

On Tuesday 6 October.

São Paulo	Buenos Aires
07:00 Early morning	07:00 Early morning
08:00 Early morning	08:00 Early morning
09:00 Working hours	09:00 Working hours
10:00 Working hours	10:00 Working hours
11:00 Working hours	11:00 Working hours
12:00 Working hours	12:00 Working hours
13:00 Working hours	13:00 Working hours
14:00 Working hours	14:00 Working hours
15:00 Working hours	15:00 Working hours
16:00 Working hours	16:00 Working hours
17:00 Evening	17:00 Evening
18:00 Evening	18:00 Evening
19:00 Evening	19:00 Evening
20:00 Evening	20:00 Evening
21:00 Evening	21:00 Evening
22:00 Sleeping hours	22:00 Sleeping hours

Daylight saving in 2026

Neither São Paulo nor Buenos Aires changes its clocks, so the difference is the same all year.

Best times for a call

Working hours (09:00–17:00) overlap for 8 hours: 09:00–17:00 in São Paulo, which is 09:00–17:00 in Buenos Aires.

São Paulo 09:00Working hoursBuenos Aires 09:00Working hours
São Paulo 10:00Working hoursBuenos Aires 10:00Working hours
São Paulo 11:00Working hoursBuenos Aires 11:00Working hours

How the time difference calculator works

The difference is each city's offset from UTC on the date you pick, subtracted. Offsets come from the IANA time zone database in your browser.

Because countries change their clocks on different dates — or not at all — the gap between two cities can change for a few weeks a year. The calculator lists every change in the year.

Examples

London is 5 hours ahead of New York for most of the year, but only 4 hours ahead for about three weeks in March and one week in late October.
Dubai doesn't change its clocks, so its gap to London is 4 hours in winter and 3 hours in summer.

Good for

Knowing when a colleague's day starts
Setting expectations for replies across time zones
Planning travel and jet lag

Frequently asked questions

What time is it in Buenos Aires when it's 9 AM in São Paulo?: 9:00 AM — as of 6 October 2026. Buenos Aires and São Paulo are on the same time.
Does the time difference between São Paulo and Buenos Aires change?: No. It's 0 minutes all through 2026: neither city changes its clocks.
What's the best time for a call between São Paulo and Buenos Aires?: Between 09:00 and 17:00 São Paulo time, when both cities are in working hours (09:00–17:00).
What time zones are São Paulo and Buenos Aires in?: São Paulo uses America/Sao_Paulo (UTC−3 today); Buenos Aires uses America/Argentina/Buenos_Aires (UTC−3 today).

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