Skip to content
Global ClockTime zone converter & meeting planner
PAGES
SETTINGS
Clock
Working hours
Start
09
End
18
Theme

AUTO follows the operating system. Working hours drive the green banding on every grid. All four persist on this device only.

Time in Sydney vs Chicago

Sydney keeps AEST (UTC+10) and Chicago keeps CDT (UTC−5) today. Chicago is 15 hours behind Sydney; the rows below read both clocks live.

The working day, side by side

The working days do not meet. there is no working-hour overlap with Chicago — the nearest workable window is 08:00–09:00 your time (17:00 there).

Sydney and Chicago hour by hour, with the working-hour overlap shaded
City00:00 in Sydney01:00 in Sydney02:00 in Sydney03:00 in Sydney04:00 in Sydney05:00 in Sydney06:00 in Sydney07:00 in Sydney08:00 in Sydney09:00 in Sydney10:00 in Sydney11:00 in Sydney12:00 in Sydney13:00 in Sydney14:00 in Sydney15:00 in Sydney16:00 in Sydney17:00 in Sydney18:00 in Sydney19:00 in Sydney20:00 in Sydney21:00 in Sydney22:00 in Sydney23:00 in Sydney
Sydney——000102030405060708091011121314151617181920212223
Chicago——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Sydney and Chicago

Open in the PlannerAdd more cities, find a meeting time that works for everyone, then share it as a link.Open in Watch ViewKeep Sydney, Chicago and other cities on screen as live clocks, under an animated sky and sun.

Best hours to call

there is no working-hour overlap with Chicago — the nearest workable window is 08:00–09:00 your time (17:00 there).

Where daylight saving pulls them apart

Sydney next changes on Sunday 4 October 2026. Chicago next changes on Sunday 1 November 2026. Between those two dates the gap between the cities is an hour different from the one shown above — which is exactly when a recurring meeting drifts. Every date we track is on the daylight saving page.

Also useful

Common questions

How many hours ahead is Chicago of Sydney?

Chicago is 15 hours behind Sydney right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Sydney and Chicago?

There is no hour inside working hours in both cities. 08:00–09:00 your time (17:00 there) is the cheapest compromise, and one side is taking a shoulder hour.

Do Sydney and Chicago change clocks on the same date?

No. Sydney changes on 4 October 2026 and Chicago on 1 November 2026, so the gap moves by an hour in between.