ACST SydneyTime Converter
ACST (UTC+9:30) is currently 30 minutes behind Sydney (AEST, UTC+10). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in ACST, it's the same day in Sydney.
ACST runs 30 minutes behind Sydney (AEST/AEDT). Both sides keep standard office hours with a real 9–6 overlap — the highlighted window below works for everyone.
- Time difference
- +0h 30m
- ACST
- UTC+9:30
- Sydney
- UTC+10
- Best call window
- 9:00 AM ACST
ACST to Sydney conversion table
The next 12 hours in ACST and the matching local time in Sydney. The current hour is highlighted; drag the converter's slider and the table follows.
| ACST | Sydney · AEST |
|---|---|
| NOW Mon, Jun 22 |
Mon, Jun 22 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Tue, Jun 23 |
Best time to meet between ACST & Sydney
Working hours are 9am–6pm in each city. The bright band is where they overlap — when both sides are at their desks.
This time difference never changes
Neither side observes daylight saving against the other, so the gap stays constant all year. Regions on ACST switch to ACDT (UTC+10:30) during daylight saving time. Clocks in Sydney move forward 1 hour to AEDT (UTC+11) on Sunday, October 4, 2026. This page always shows the live, DST-aware difference.
Related time zone conversions
Jump straight to another pair — every combination is a live tool, not an article.
From ACST
To Sydney
One source of truth — for you and your AI
This page exposes the same answer as structured data, so when you ask an assistant "what's 9am ACST time in Sydney?", it can cite the exact, DST-aware result — not a stale blog post.
- Schema.org JSON-LD on every converter page
- A machine-readable facts island with IANA zones and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "ACST → Sydney",
"url": "https://worldclock.pro/en/convert/acst-to-sydney",
"from": {
"name": "ACST",
"type": "timezone",
"abbreviation": "ACST",
"daylightAbbreviation": "ACDT",
"iana": "Australia/Adelaide",
"standardUtcOffset": "+09:30",
"daylightUtcOffset": "+10:30",
"referenceCity": "Adelaide"
},
"to": {
"name": "Sydney",
"type": "city",
"abbreviation": "AEST",
"daylightAbbreviation": "AEDT",
"iana": "Australia/Sydney",
"standardUtcOffset": "+10:00",
"daylightUtcOffset": "+11:00",
"referenceCity": "Sydney"
},
"currentDifferenceMinutes": 30,
"possibleDifferencesMinutes": [
30
],
"note": "The difference is constant year-round."
}
Frequently asked questions
What is the time difference between ACST and Sydney?
ACST is currently 30 minutes behind Sydney. ACST is on ACST (UTC+9:30) and Sydney is on AEST (UTC+10). The difference can change when either side starts or ends daylight saving time.
Is Sydney ahead of or behind ACST?
Sydney is currently 30 minutes ahead of ACST.
When it is 9:00 AM in ACST, what time is it in Sydney?
When it is 9:00 AM on a Monday in ACST, it is 9:30 AM in Sydney.
Do ACST and Sydney observe daylight saving time?
Regions on ACST switch to ACDT (UTC+10:30) during daylight saving time. Clocks in Sydney move forward 1 hour to AEDT (UTC+11) on Sunday, October 4, 2026.
How do I convert ACST time to Sydney time?
Add 30 minutes to any time in ACST to get the time in Sydney. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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