What is the time difference between Vienna and Sydney?

Sydney is 8 hours ahead of Vienna. 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 Sydney from Vienna?

Between 09:00–10:00 in Vienna, which is 17:00–18:00 in Sydney. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Vienna observe daylight saving time?

Yes. Vienna runs on UTC+1 in winter and UTC+2 in summer. The next change is on 2026-10-25, when clocks go back by 60 minutes.

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.

If it is midday in Vienna, what time is it in Sydney?

It is 20:00 in Sydney, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.

Which time zones do Vienna and Sydney use?

Vienna uses Europe/Vienna, currently UTC+2 (CEST), and Sydney uses Australia/Sydney, currently UTC+10 (AEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Vienna time to Sydney time

Right now Sydney runs 8 hours ahead of Vienna. That gap is not fixed: it moves when either city changes its clocks.

Convert a time

From

Date

Time

Converted time

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The converter needs JavaScript to run. Everything below — offsets, daylight saving dates and the hour-by-hour table — is part of the page and works without it.

Hour by hour

The whole day mapped across: read down the left for Vienna, across for Sydney.

Vienna	Sydney
00:00	08:00
01:00	09:00
02:00	10:00
03:00	11:00
04:00	12:00
05:00	13:00
06:00	14:00
07:00	15:00
08:00	16:00
09:00	17:00
10:00	18:00
11:00	19:00
12:00	20:00
13:00	21:00
14:00	22:00
15:00	23:00
16:00	00:00next day
17:00	01:00next day
18:00	02:00next day
19:00	03:00next day
20:00	04:00next day
21:00	05:00next day
22:00	06:00next day
23:00	07:00next day

Daylight saving time

Vienna and Sydney both observe daylight saving. Where their change dates differ, so does the gap between them for the weeks in between.

Vienna

Observes daylight saving time

Standard: UTC+1
Daylight: UTC+2
Next change: 2026-10-25 −60m

Sydney

Observes daylight saving time

Standard: UTC+10
Daylight: UTC+11
Next change: 2026-10-04 +60m

When you can actually talk

The window is 1 hour wide — 09:00–10:00 in Vienna, 17:00–18:00 in Sydney.

Vienna 09:00–10:00Sydney 17:00–18:00

Reference

The underlying data, in case you need to put it in a calendar invitation or a configuration file.

	Vienna	Sydney
IANA zone	Europe/Vienna	Australia/Sydney
Abbreviation	CEST	AEST
Standard offset	UTC+1	UTC+10
Daylight offset	UTC+2	UTC+11
Clock changes this year	2	2
Country	Austria	Australia

Example, not the current time. Live times appear once the page loads.

Common questions

What is the time difference between Vienna and Sydney?: Sydney is 8 hours ahead of Vienna. 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 Sydney from Vienna?: Between 09:00–10:00 in Vienna, which is 17:00–18:00 in Sydney. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Vienna observe daylight saving time?: Yes. Vienna runs on UTC+1 in winter and UTC+2 in summer. The next change is on 2026-10-25, when clocks go back by 60 minutes.
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.
If it is midday in Vienna, what time is it in Sydney?: It is 20:00 in Sydney, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.
Which time zones do Vienna and Sydney use?: Vienna uses Europe/Vienna, currently UTC+2 (CEST), and Sydney uses Australia/Sydney, currently UTC+10 (AEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.