CST to AEST Time Converter

Convert Central Standard Time (CST) to Australian Eastern Standard Time (AEST). Both time zones are shown live below; current offset between them is 15 hours ahead.

Chicago · Central Standard Time
15:55:26
Sunday, May 10, 2026
CDT · UTC-05:00
Sydney · Australian Eastern Standard Time
06:55:26
Monday, May 11, 2026
GMT+10 · UTC+10:00

Convert a specific time

From: CST (Chicago)
To: AEST (Sydney)
--:--

Daylight Saving status right now

CST (Central Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-05:00 → UTC-06:00
AEST (Australian Eastern Standard Time)
Observes DST
Yes
In DST right now
No
Next spring forward
2026-10-04
Offset shift
UTC+10:00 → UTC+11:00

When can CST and AEST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
CST
AEST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Chicago (CST). Each row shows the local working-hours state in that zone for the same moment in time.
No overlap during strict 9-5 working hours; some flexibility needed.
If both sides are willing to extend to 8am-7pm, the available window is 17:00–18:00 CST (08:00–09:00 AEST).

Hour-by-hour CST to AEST conversion table

CST time (Chicago)AEST time (Sydney)Status
00:00 Sun15:00 SunAEST working
01:00 Sun16:00 SunAEST working
02:00 Sun17:00 SunOff-hours both sides
03:00 Sun18:00 SunOff-hours both sides
04:00 Sun19:00 SunOff-hours both sides
05:00 Sun20:00 SunOff-hours both sides
06:00 Sun21:00 SunOff-hours both sides
07:00 Sun22:00 SunOff-hours both sides
08:00 Sun23:00 SunOff-hours both sides
09:00 Sun00:00 MonCST working
10:00 Sun01:00 MonCST working
11:00 Sun02:00 MonCST working
12:00 Sun03:00 MonCST working
13:00 Sun04:00 MonCST working
14:00 Sun05:00 MonCST working
15:00 Sun06:00 MonCST working
16:00 Sun07:00 MonCST working
17:00 Sun08:00 MonOff-hours both sides
18:00 Sun09:00 MonAEST working
19:00 Sun10:00 MonAEST working
20:00 Sun11:00 MonAEST working
21:00 Sun12:00 MonAEST working
22:00 Sun13:00 MonAEST working
23:00 Sun14:00 MonAEST working

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Central Standard Time (CST)
IANA identifier
America/Chicago
Current UTC offset
UTC-05:00
Current abbreviation
CDT
Major cities in this zone
ChicagoHoustonDallasAustinNew Orleans
Australian Eastern Standard Time (AEST)
IANA identifier
Australia/Sydney
Current UTC offset
UTC+10:00
Current abbreviation
GMT+10
Major cities in this zone
SydneyMelbourneCanberra

Sun today in Chicago and Sydney

Chicago
Sunrise
05:37
Sunset
19:59
Solar noon
12:48
Daylight
14h 22m
Sydney
Sunrise
06:38
Sunset
17:07
Solar noon
11:52
Daylight
10h 29m

Related converters

AEST to CST (reverse)CST to ESTCST to PSTCST to GMTCST to UTCCST to CETEST to AESTPST to AESTGMT to AESTUTC to AESTCET to AEST
Looking for local time? See time in Chicago or time in Sydney.

Frequently asked questions

What is the time difference between CST and AEST right now?+
AEST (Australian Eastern Standard Time) is currently 15 hours ahead CST (Central Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does CST or AEST observe daylight saving time?+
CST: observes daylight saving time. AEST: observes daylight saving time.
When is the best time to schedule a meeting between CST and AEST?+
Standard 9-5 hours do not overlap. Extending to 8am-7pm gives a window of 17:00–18:00 CST (08:00–09:00 AEST).
What time is it in Sydney when it is 12:00 noon in Chicago?+
When it is 12:00 Sun in Chicago (CST), it is 03:00 Mon in Sydney (AEST).
Which IANA time zone identifiers are used for CST and AEST?+
CST maps to "America/Chicago" in the IANA database. AEST maps to "Australia/Sydney". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Chicago ahead of or behind Sydney?+
Whether Chicago (CST) is ahead of or behind Sydney (AEST) depends on the current UTC offsets. Right now AEST is 15 hours ahead CST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for CST and AEST?+
CST is UTC-05:00 (CDT) and AEST is UTC+10:00 (GMT+10). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both CST and AEST?+
Not during a strict 9am-5pm window. If both sides flex to 8am-7pm, the available meeting window between CST and AEST is 17:00–18:00 CST.