Live · calculated from the IANA time-zone database

Time difference between Sydney and Buenos Aires

Short answer

Buenos Aires is 13 hours behind Sydney. Right now it is 22:34 in Sydney (GMT+10, UTC+10) and 09:34 in Buenos Aires (GMT-3, UTC−3).

Right now

Sydney · Australia

22:34

Tuesday, September 15, 2026

Australian Eastern Standard Time · GMT+10 · UTC+10

Buenos Aires · Argentina

09:34

Tuesday, September 15, 2026

Argentina Standard Time · GMT-3 · UTC−3

Times at the moment this page was generated. Reload for a fresh reading.

Does the difference between Sydney and Buenos Aires change during the year?

Yes. For 183 days of 2026 the difference is 14 hours, but it moves whenever Sydney or Buenos Aires enters or leaves daylight saving time. Here is the full 2026 calendar (dates in UTC):

From	Until	Buenos Aires vs Sydney
January 1	April 4	−14 h
April 4	October 3	−13 h
October 3	December 31	−14 h

The highlighted row is the current period. Every date comes from each zone's official rules, not from a hand-typed table.

Best time to call Buenos Aires from Sydney (and vice versa)

With 13 hours between them there is no hour at which Sydney and Buenos Aires are both inside a 9:00–17:00 working day. Teams split across these two cities usually alternate the sacrifice: one week the meeting lands early (7:00–8:00) in Buenos Aires and late (18:00–19:00) in the other city, the next week the other way round. The Timezone Matcher grid shades exactly those compromise hours.

Sydney to Buenos Aires conversion table

Each Sydney hour and its equivalent in Buenos Aires today. Rows shaded green are working hours (9:00–17:00) in both cities at once.

Sydney time · Tue, Sep 15	Buenos Aires time
00:00	11:00previous day
01:00	12:00previous day
02:00	13:00previous day
03:00	14:00previous day
04:00	15:00previous day
05:00	16:00previous day
06:00	17:00previous day
07:00	18:00previous day
08:00	19:00previous day
09:00	20:00previous day
10:00	21:00previous day
11:00	22:00previous day
12:00	23:00previous day
13:00	00:00
14:00	01:00
15:00	02:00
16:00	03:00
17:00	04:00
18:00	05:00
19:00	06:00
20:00	07:00
21:00	08:00
22:00	09:00
23:00	10:00

Looking for it the other way round? This page covers both directions: Buenos Aires to Sydney is the same difference with the sign flipped.

The two time zones

Sydney — Australia/Sydney

Sydney uses Australian Eastern Time: UTC+10 in winter (AEST) and UTC+11 in summer (AEDT), from the first Sunday of October to the first Sunday of April — opposite to the northern hemisphere.

Buenos Aires — America/Argentina/Buenos_Aires

Buenos Aires keeps Argentina Time, a fixed UTC−3 with no seasonal change, matching São Paulo and Montevideo all year.

Frequently asked questions

How many hours difference between Sydney and Buenos Aires?

Buenos Aires is 13 hours behind Sydney. For most of the year (183 days) the difference is 14 hours; it shifts during the weeks when one of the two cities enters or leaves daylight saving time.

When it is 12:00 noon in Sydney, what time is it in Buenos Aires?

23:00 in Buenos Aires the previous day (at today's difference of 13 hours).

What is the best time for a meeting between Sydney and Buenos Aires?

There is no overlap between the 9:00–17:00 working days of Sydney and Buenos Aires. Teams usually alternate: an early-morning slot in Buenos Aires lands in the late evening of the other city.

Do Sydney and Buenos Aires observe daylight saving time?

Sydney: yes. Buenos Aires: no. Because only one of them changes its clocks, the difference moves by one hour twice a year.

What time zone is Sydney in? And Buenos Aires?

Sydney: Australian Eastern Standard Time (Australia/Sydney, UTC+10). Buenos Aires: Argentina Standard Time (America/Argentina/Buenos_Aires, UTC−3).

Tools

Meeting grid — add both cities and click a slot

Time zone converter — any city, any time

Working hours overlap calculator

Daylight saving time 2027 — all dates