What is the time difference between Adelaide and Sydney?

Sydney is 30 minutes ahead of Adelaide. 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 Adelaide?

Between 09:30–17:30 in Adelaide, which is 10:00–18:00 in Sydney. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Adelaide observe daylight saving time?

Yes. Adelaide runs on UTC+9:30 in winter and UTC+10:30 in summer. The next change is on 2026-10-04, when clocks go forward 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 Adelaide, what time is it in Sydney?

It is 12:30 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 Adelaide and Sydney use?

Adelaide uses Australia/Adelaide, currently UTC+9:30 (ACST), 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 Adelaide time to Sydney time

Right now Sydney runs 30 minutes ahead of Adelaide. 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 Adelaide, across for Sydney.

Adelaide	Sydney
00:00	00:30
01:00	01:30
02:00	02:30
03:00	03:30
04:00	04:30
05:00	05:30
06:00	06:30
07:00	07:30
08:00	08:30
09:00	09:30
10:00	10:30
11:00	11:30
12:00	12:30
13:00	13:30
14:00	14:30
15:00	15:30
16:00	16:30
17:00	17:30
18:00	18:30
19:00	19:30
20:00	20:30
21:00	21:30
22:00	22:30
23:00	23:30

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.

Adelaide

Observes daylight saving time

Standard: UTC+9:30
Daylight: UTC+10:30
Next change: 2026-10-04 +60m

Sydney

Observes daylight saving time

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

When you can actually talk

You have 8 hours of shared working time: 09:30–17:30 in Adelaide, which is 10:00–18:00 in Sydney.

Adelaide 09:30–17:30Sydney 10:00–18:00
Adelaide 09:00–09:30Sydney 09:30–10:00

Reference

The zone identifiers and offsets behind everything above.

	Adelaide	Sydney
IANA zone	Australia/Adelaide	Australia/Sydney
Abbreviation	ACST	AEST
Standard offset	UTC+9:30	UTC+10
Daylight offset	UTC+10:30	UTC+11
Clock changes this year	2	2
Country	Australia	Australia

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

Common questions

What is the time difference between Adelaide and Sydney?: Sydney is 30 minutes ahead of Adelaide. 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 Adelaide?: Between 09:30–17:30 in Adelaide, which is 10:00–18:00 in Sydney. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Adelaide observe daylight saving time?: Yes. Adelaide runs on UTC+9:30 in winter and UTC+10:30 in summer. The next change is on 2026-10-04, when clocks go forward 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 Adelaide, what time is it in Sydney?: It is 12:30 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 Adelaide and Sydney use?: Adelaide uses Australia/Adelaide, currently UTC+9:30 (ACST), and Sydney uses Australia/Sydney, currently UTC+10 (AEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.