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

1:00 PM — as of 6 October 2026. Lisbon is 4 hours ahead of Buenos Aires.

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

Between 09:00 and 13:00 Buenos Aires time, when both cities are in working hours (09:00–17:00).

What time zones are Buenos Aires and Lisbon in?

Buenos Aires uses America/Argentina/Buenos_Aires (UTC−3 today); Lisbon uses Europe/Lisbon (UTC+1 today).

Time difference between Buenos Aires and Lisbon

Lisbon is 4 hours ahead of Buenos Aires. When it's 9:00 in Buenos Aires, it's 13:00 in Lisbon.

From

Lisbon is 4 hours ahead of Buenos Aires.

On Tuesday, 6 October 2026, 09:00 in Buenos Aires is 13:00 in Lisbon. Buenos Aires is UTC−3; Lisbon is UTC+1.

The gap through 2026

1 Jan – 29 MarLisbon is 3 hours ahead of Buenos Aires.
29 Mar – 25 OctLisbon is 4 hours ahead of Buenos Aires.
25 Oct – 31 DecLisbon is 3 hours ahead of Buenos Aires.

Lisbon moves its clocks forward on 29 March (UTC → UTC+1).
Lisbon moves its clocks back on 25 October (UTC+1 → UTC).

Buenos Aires to Lisbon, hour by hour

On Tuesday 6 October.

Buenos Aires	Lisbon
07:00 Early morning	11:00 Working hours
08:00 Early morning	12:00 Working hours
09:00 Working hours	13:00 Working hours
10:00 Working hours	14:00 Working hours
11:00 Working hours	15:00 Working hours
12:00 Working hours	16:00 Working hours
13:00 Working hours	17:00 Evening
14:00 Working hours	18:00 Evening
15:00 Working hours	19:00 Evening
16:00 Working hours	20:00 Evening
17:00 Evening	21:00 Evening
18:00 Evening	22:00 Sleeping hours
19:00 Evening	23:00 Sleeping hours
20:00 Evening	00:00+1 Sleeping hours
21:00 Evening	01:00+1 Sleeping hours
22:00 Sleeping hours	02:00+1 Sleeping hours

Daylight saving in 2026

Lisbon moves its clocks forward on Sunday 29 March (UTC → UTC+1).
Lisbon moves its clocks back on Sunday 25 October (UTC+1 → UTC).

1 Jan – 29 MarLisbon is 3 hours ahead of Buenos Aires.
29 Mar – 25 OctLisbon is 4 hours ahead of Buenos Aires.
25 Oct – 31 DecLisbon is 3 hours ahead of Buenos Aires.

Best times for a call

Working hours (09:00–17:00) overlap for 4 hours: 09:00–13:00 in Buenos Aires, which is 13:00–17:00 in Lisbon.

Buenos Aires 09:00Working hoursLisbon 13:00Working hours
Buenos Aires 10:00Working hoursLisbon 14:00Working hours
Buenos Aires 11:00Working hoursLisbon 15:00Working 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 Lisbon when it's 9 AM in Buenos Aires?: 1:00 PM — as of 6 October 2026. Lisbon is 4 hours ahead of Buenos Aires.
Does the time difference between Buenos Aires and Lisbon change?: Yes. In 2026 it's 3 hours or 4 hours, depending on the date, because only Lisbon changes its clocks.
What's the best time for a call between Buenos Aires and Lisbon?: Between 09:00 and 13:00 Buenos Aires time, when both cities are in working hours (09:00–17:00).
What time zones are Buenos Aires and Lisbon in?: Buenos Aires uses America/Argentina/Buenos_Aires (UTC−3 today); Lisbon uses Europe/Lisbon (UTC+1 today).

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