Adelaide ChicagoACST to CST Time Converter
Adelaide (ACST, UTC+9:30) is currently 15 hours 30 minutes ahead of Chicago (CST, UTC−6). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in Adelaide, it's the previous day in Chicago.
Adelaide (ACST) runs 15 hours 30 minutes ahead of Chicago (CST). Both sides keep standard office hours with a real 9–6 overlap — the highlighted window below works for everyone.
- Time difference
- −15h 30m
- ACST
- UTC+9:30
- CST
- UTC−6
- Best call window
- 9:00 AM ACST
ACST to CST conversion table
The next 12 hours in ACST and the matching local time in CST. The current hour is highlighted; drag the converter's slider and the table follows.
| ACST | CST |
|---|---|
| NOW Mon, Jun 22 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Best time to meet between ACST & CST
Working hours are 9am–6pm in each city. The bright band is where they overlap — when both sides are at their desks.
Daylight saving shifts this gap by up to 2 hours
The difference between ACST and CST swings between 16.5, 15.5 and 14.5 hours across the year as each side starts or ends daylight saving. Regions on ACST switch to ACDT (UTC+10:30) during daylight saving time. Regions on CST switch to CDT (UTC−5) during daylight saving time. 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 CST
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 CST?", 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 → CST",
"url": "https://worldclock.pro/en/convert/acst-to-cst",
"from": {
"name": "ACST",
"type": "timezone",
"abbreviation": "ACST",
"daylightAbbreviation": "ACDT",
"iana": "Australia/Adelaide",
"standardUtcOffset": "+09:30",
"daylightUtcOffset": "+10:30",
"referenceCity": "Adelaide"
},
"to": {
"name": "CST",
"type": "timezone",
"abbreviation": "CST",
"daylightAbbreviation": "CDT",
"iana": "America/Chicago",
"standardUtcOffset": "-06:00",
"daylightUtcOffset": "-05:00",
"referenceCity": "Chicago"
},
"currentDifferenceMinutes": -930,
"possibleDifferencesMinutes": [
-990,
-930,
-870
],
"note": "Between the regions that use these zones the difference is 16.5, 15.5 and 14.5 hours across the year, depending on daylight saving on each side. The clocks on this page show the named zones themselves, which are fixed."
}
Frequently asked questions
What is the time difference between ACST and CST?
ACST is currently 15 hours 30 minutes ahead of CST. ACST is on ACST (UTC+9:30) and CST is on CST (UTC−6). The difference can change when either side starts or ends daylight saving time.
Is CST ahead of or behind ACST?
CST is currently 15 hours 30 minutes behind ACST.
When it is 9:00 AM in ACST, what time is it in CST?
When it is 9:00 AM on a Monday in ACST, it is 5:30 PM the previous day in CST.
Do ACST and CST observe daylight saving time?
Regions on ACST switch to ACDT (UTC+10:30) during daylight saving time. Regions on CST switch to CDT (UTC−5) during daylight saving time.
How do I convert ACST time to CST time?
Subtract 15 hours 30 minutes from any time in ACST to get the time in CST. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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