Australian Eastern Standard Time → Central Daylight Time
AEST = UTC+10CDT = UTC-5
AEST (Brisbane) ↔ CDT (Chicago)
No overlap — one side will join outside working hours
AEST (Brisbane)
CDT (Chicago)
00:00
09:00-1dWorking
01:00
10:00-1dWorking
02:00
11:00-1dWorking
03:00
12:00-1dWorking
04:00
13:00-1dWorking
05:00
14:00-1dWorking
06:00
15:00-1dWorking
07:00
16:00-1dWorking
08:00
17:00-1d
09:00Working
18:00-1doff
10:00Working
19:00-1doff
11:00Working
20:00-1doff
12:00Working
21:00-1doff
13:00Working
22:00-1doff
14:00Working
23:00-1doff
15:00Working
00:00off
16:00Working
01:00off
17:00
02:00
18:00
03:00
19:00
04:00
20:00
05:00
21:00
06:00
22:00
07:00
23:00
08:00
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between aest and cdt?
Australian Eastern Standard Time (aest) is UTC+10 and Central Daylight Time (cdt) is UTC-5. The difference between them is 15 hours.
Where is aest used?
Australian Eastern Standard Time (aest) is used in Australia and surrounding regions. The IANA timezone identifier is Australia/Brisbane.
Where is cdt used?
Central Daylight Time (cdt) is used in USA and surrounding regions. The IANA timezone identifier is America/Chicago.
How do I convert aest to cdt?
Use the interactive converter above. Drag the time slider to any aest time and the cdt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
AEST (Brisbane) vs CDT (Chicago) — time difference
AEST (Brisbane) is 15 hours ahead of CDT (Chicago). Midday in AEST (Brisbane) lines up with 21:00 in CDT (Chicago).
AEST (Brisbane) observes Australia/Brisbane and CDT (Chicago) observes America/Chicago — a 15 hours gap between them.
Shared working hours
When AEST (Brisbane) is in standard working hours, CDT (Chicago) is not — and vice versa. There is no mutual business window between these two locations.
Optimal meeting slots
No business hours overlap exists between AEST (Brisbane) and CDT (Chicago). Showing the most balanced options with minimal inconvenience for both locations.
07:00 Brisbane / 16:00 Chicago⚡ One side off-hours
⚠️ 2h before working hours in Brisbane
09:00 Brisbane / 18:00 Chicago⚡ One side off-hours
⚠️ 2h after working hours in Chicago
06:00 Brisbane / 15:00 Chicago⚡ One side off-hours
⚠️ 3h before working hours in Brisbane
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.
AEST (Brisbane)7 holidays
Aug 3Picnic Day
Sep 28King's Birthday
Oct 5Labour Day
Oct 5King's Birthday
Nov 3Melbourne Cup
CDT (Chicago)7 holidays
Jul 3Independence DaySOON
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
Nov 11Veterans Day
How to work with AEST (Brisbane) and CDT (Chicago) time zones
A 15-hour difference separates AEST (Brisbane) (Australia) and CDT (Chicago) (USA) — wide enough that standard business hours don't align at all. Scheduling requires deliberate compromise from both sides.
💡 How to schedule across these time zones
⚡
07:00–08:00 in AEST (Brisbane) corresponds to 16:00–17:00 in CDT (Chicago) (2h before working hours in Brisbane).
⚡
09:00–10:00 in AEST (Brisbane) corresponds to 18:00–19:00 in CDT (Chicago) (2h after working hours in Chicago).
⚡
06:00–07:00 in AEST (Brisbane) corresponds to 15:00–16:00 in CDT (Chicago) (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 AEST (Brisbane) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.
