What time is it in Buenos Aires when it's 9 AM in New York?

10:00 AM — as of 6 October 2026. Buenos Aires is 1 hour ahead of New York.

What's the best time for a call between New York and Buenos Aires?

Between 09:00 and 16:00 New York time, when both cities are in working hours (09:00–17:00).

What time zones are New York and Buenos Aires in?

New York uses America/New_York (UTC−4 today); Buenos Aires uses America/Argentina/Buenos_Aires (UTC−3 today).

Time difference between New York and Buenos Aires

Buenos Aires is 1 hour ahead of New York. When it's 9:00 in New York, it's 10:00 in Buenos Aires.

From

Buenos Aires is 1 hour ahead of New York.

On Tuesday, 6 October 2026, 09:00 in New York is 10:00 in Buenos Aires. New York is UTC−4; Buenos Aires is UTC−3.

The gap through 2026

1 Jan – 8 MarBuenos Aires is 2 hours ahead of New York.
8 Mar – 1 NovBuenos Aires is 1 hour ahead of New York.
1 Nov – 31 DecBuenos Aires is 2 hours ahead of New York.

New York moves its clocks forward on 8 March (UTC−5 → UTC−4).
New York moves its clocks back on 1 November (UTC−4 → UTC−5).

New York to Buenos Aires, hour by hour

On Tuesday 6 October.

New York	Buenos Aires
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	23:00 Sleeping hours

Daylight saving in 2026

New York moves its clocks forward on Sunday 8 March (UTC−5 → UTC−4).
New York moves its clocks back on Sunday 1 November (UTC−4 → UTC−5).

1 Jan – 8 MarBuenos Aires is 2 hours ahead of New York.
8 Mar – 1 NovBuenos Aires is 1 hour ahead of New York.
1 Nov – 31 DecBuenos Aires is 2 hours ahead of New York.

Best times for a call

Working hours (09:00–17:00) overlap for 7 hours: 09:00–16:00 in New York, which is 10:00–17:00 in Buenos Aires.

New York 09:00Working hoursBuenos Aires 10:00Working hours
New York 10:00Working hoursBuenos Aires 11:00Working hours
New York 11:00Working hoursBuenos Aires 12:00Working 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 New York?: 10:00 AM — as of 6 October 2026. Buenos Aires is 1 hour ahead of New York.
Does the time difference between New York and Buenos Aires change?: Yes. In 2026 it's 2 hours or 1 hour, depending on the date, because only New York changes its clocks.
What's the best time for a call between New York and Buenos Aires?: Between 09:00 and 16:00 New York time, when both cities are in working hours (09:00–17:00).
What time zones are New York and Buenos Aires in?: New York uses America/New_York (UTC−4 today); Buenos Aires uses America/Argentina/Buenos_Aires (UTC−3 today).

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