No overlap — one side will join outside working hours
CST (Chicago)
AEDT (Sydney)
00:00
15:00Working
01:00
16:00Working
02:00
17:00
03:00
18:00
04:00
19:00
05:00
20:00
06:00
21:00
07:00
22:00
08:00
23:00
09:00Working
00:00+1doff
10:00Working
01:00+1doff
11:00Working
02:00+1doff
12:00Working
03:00+1doff
13:00Working
04:00+1doff
14:00Working
05:00+1doff
15:00Working
06:00+1doff
16:00Working
07:00+1doff
17:00
08:00+1d
18:00
09:00+1dWorking
19:00
10:00+1dWorking
20:00
11:00+1dWorking
21:00
12:00+1dWorking
22:00
13:00+1dWorking
23:00
14:00+1dWorking
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between cst and aedt?
Central Standard Time (cst) is UTC-5 and Australian Eastern Daylight Time (aedt) is UTC+10. The difference between them is 15 hours.
Where is cst used?
Central Standard Time (cst) is used in USA and surrounding regions. The IANA timezone identifier is America/Chicago. Note: cst is ambiguous and may refer to other timezones.
Where is aedt used?
Australian Eastern Daylight Time (aedt) is used in Australia and surrounding regions. The IANA timezone identifier is Australia/Sydney.
How do I convert cst to aedt?
Use the interactive converter above. Drag the time slider to any cst time and the aedt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
CST (Chicago) is 15 hours behind AEDT (Sydney). Midday in CST (Chicago) lines up with 03:00 in AEDT (Sydney).
CST (Chicago) observes America/Chicago and AEDT (Sydney) observes Australia/Sydney — a 15 hours gap between them.
Business hours comparison
When CST (Chicago) is in standard working hours, AEDT (Sydney) is not — and vice versa. There is no mutual business window between these two locations.
Optimal meeting slots
No business hours overlap exists between CST (Chicago) and AEDT (Sydney). Showing the most balanced options with minimal inconvenience for both locations.
16:00 Chicago / 07:00 Sydney⚡ One side off-hours
⚠️ 2h before working hours in Sydney
18:00 Chicago / 09:00 Sydney⚡ One side off-hours
⚠️ 2h after working hours in Chicago
15:00 Chicago / 06:00 Sydney⚡ One side off-hours
⚠️ 3h before working hours in Sydney
Assumes a standard 9 AM–5 PM workday in each location's local timezone.
Upcoming public holidays
⚡ Watch out — upcoming holidays on both sides. Verify availability in advance.
CST (Chicago)7 holidays
Jul 3Independence DaySOON
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
Nov 11Veterans Day
AEDT (Sydney)7 holidays
Aug 3Picnic Day
Sep 28King's Birthday
Oct 5Labour Day
Oct 5King's Birthday
Nov 3Melbourne Cup
How to work with CST (Chicago) and AEDT (Sydney) time zones
Teams in CST (Chicago) (USA) and AEDT (Sydney) (Australia) deal with a 15-hour gap that pushes their working days apart. Real-time meetings always require someone to stretch outside the standard 9–5.
💡 How to schedule across these time zones
⚡
16:00–17:00 in CST (Chicago) corresponds to 07:00–08:00 in AEDT (Sydney) (2h before working hours in Sydney).
⚡
18:00–19:00 in CST (Chicago) corresponds to 09:00–10:00 in AEDT (Sydney) (2h after working hours in Chicago).
⚡
15:00–16:00 in CST (Chicago) corresponds to 06:00–07:00 in AEDT (Sydney) (3h before working hours in Sydney).
Since there is no natural overlap, the options above represent the most balanced compromise, minimizing out-of-hours inconvenience for both sides.
Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.
Drag the slider at the top to convert any CST (Chicago) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.