Central Daylight Time → Australian Eastern Standard Time
CDT = UTC-5AEST = UTC+10
CDT (Chicago) ↔ AEST (Brisbane)
No overlap — one side will join outside working hours
CDT (Chicago)
AEST (Brisbane)
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 aest?
Central Daylight Time (cdt) is UTC-5 and Australian Eastern Standard Time (aest) 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 aest used?
Australian Eastern Standard Time (aest) is used in Australia and surrounding regions. The IANA timezone identifier is Australia/Brisbane.
How do I convert cdt to aest?
Use the interactive converter above. Drag the time slider to any cdt time and the aest 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 AEST (Brisbane)?
CDT (Chicago) is 15 hours behind AEST (Brisbane). When CDT (Chicago) clocks hit noon, AEST (Brisbane) reads 03:00.
CDT (Chicago) observes America/Chicago and AEST (Brisbane) observes Australia/Brisbane — a 15 hours gap between them.
Daily overlap window
When CDT (Chicago) is in standard working hours, AEST (Brisbane) is not — and vice versa. There is no mutual business window between these two locations.
Optimal meeting slots
No business hours overlap exists between CDT (Chicago) and AEST (Brisbane). Showing the most balanced options with minimal inconvenience for both locations.
16:00 Chicago / 07:00 Brisbane⚡ One side off-hours
⚠️ 2h before working hours in Brisbane
18:00 Chicago / 09:00 Brisbane⚡ One side off-hours
⚠️ 2h after working hours in Chicago
15:00 Chicago / 06:00 Brisbane⚡ One side off-hours
⚠️ 3h before working hours in Brisbane
Assumes a standard 9 AM–5 PM workday in each location's local timezone.
Holiday calendar for both locations
⚡ Both locations have upcoming holidays, check availability before scheduling.
CDT (Chicago)8 holidays
Jun 19Juneteenth National Independence DaySOON
Jul 3Independence Day
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
AEST (Brisbane)7 holidays
Aug 3Picnic Day
Sep 28King's Birthday
Oct 5Labour Day
Oct 5King's Birthday
Nov 3Melbourne Cup
Working across CDT (Chicago) and AEST (Brisbane)
Coordinating between CDT (Chicago) (USA) and AEST (Brisbane) (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.
💡 Best practice for cross-timezone meetings
⚡
16:00–17:00 in CDT (Chicago) corresponds to 07:00–08:00 in AEST (Brisbane) (2h before working hours in Brisbane).
⚡
18:00–19:00 in CDT (Chicago) corresponds to 09:00–10:00 in AEST (Brisbane) (2h after working hours in Chicago).
⚡
15:00–16:00 in CDT (Chicago) corresponds to 06:00–07:00 in AEST (Brisbane) (3h before working hours in Brisbane).
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 CDT (Chicago) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.
