What is the time difference between Sydney and Vienna?

Vienna is 8 hours behind Sydney. 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 Vienna from Sydney?

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

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.

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.

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

It is 04:00 in Vienna, 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 Sydney and Vienna use?

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

Convert Sydney time to Vienna time

Vienna is 8 hours behind Sydney right now, so midday in Sydney lands in the small hours in Vienna.

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 Sydney, across for Vienna.

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

Daylight saving time

Both cities change their clocks, but not necessarily on the same date — which is why the difference between them shifts for a few weeks each year.

Sydney

Observes daylight saving time

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

Vienna

Observes daylight saving time

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

When you can actually talk

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

Sydney 17:00–18:00Vienna 09:00–10:00

Reference

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

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

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

Common questions

What is the time difference between Sydney and Vienna?: Vienna is 8 hours behind Sydney. 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 Vienna from Sydney?: Between 17:00–18:00 in Sydney, which is 09:00–10:00 in Vienna. That is the only stretch where both cities are inside a 09:00–18:00 day.
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.
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.
If it is midday in Sydney, what time is it in Vienna?: It is 04:00 in Vienna, 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 Sydney and Vienna use?: Sydney uses Australia/Sydney, currently UTC+10 (AEST), and Vienna uses Europe/Vienna, currently UTC+2 (CEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.