Central Daylight Time → Australian Eastern Daylight Time
CDT = UTC-5AEDT = UTC+10
CDT (Chicago) ↔ AEDT (Sydney)
No overlap — one side will join outside working hours
CDT (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 cdt and aedt?
Central Daylight Time (cdt) is UTC-5 and Australian Eastern Daylight Time (aedt) is UTC+10. The difference between them is 15 hours.
Where is cdt used?
Central Daylight Time (cdt) is used in USA and surrounding regions. The IANA timezone identifier is America/Chicago.
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 cdt to aedt?
Use the interactive converter above. Drag the time slider to any cdt time and the aedt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
How far apart are CDT (Chicago) and AEDT (Sydney)?
CDT (Chicago) is 15 hours behind AEDT (Sydney). When it's noon in CDT (Chicago), it's 03:00 in AEDT (Sydney).
CDT (Chicago) observes America/Chicago and AEDT (Sydney) observes Australia/Sydney — a 15 hours gap between them.
Daily overlap window
When CDT (Chicago) is in standard working hours, AEDT (Sydney) is not — and vice versa. There is no mutual business window between these two locations.
Meeting time recommendations
No business hours overlap exists between CDT (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.
Public holidays this year
⚡ Upcoming holidays in both locations, confirm with your contact before booking.
CDT (Chicago)8 holidays
Jun 19Juneteenth National Independence DaySOON
Jul 3Independence Day
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
AEDT (Sydney)7 holidays
Aug 3Picnic Day
Sep 28King's Birthday
Oct 5Labour Day
Oct 5King's Birthday
Nov 3Melbourne Cup
CDT (Chicago) and AEDT (Sydney) — practical scheduling
Coordinating between CDT (Chicago) (USA) and AEDT (Sydney) (Australia) means working around a 15-hour time difference. Since standard business hours don't naturally overlap, meetings usually require one side to shift slightly outside their normal working day.
💡 Practical scheduling guidelines
⚡
16:00–17:00 in CDT (Chicago) corresponds to 07:00–08:00 in AEDT (Sydney) (2h before working hours in Sydney).
⚡
18:00–19:00 in CDT (Chicago) corresponds to 09:00–10:00 in AEDT (Sydney) (2h after working hours in Chicago).
⚡
15:00–16:00 in CDT (Chicago) corresponds to 06:00–07:00 in AEDT (Sydney) (3h before working hours in Sydney).
With no shared business hours, these slots distribute the scheduling burden as evenly as possible between both locations.
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 CDT (Chicago) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.
