Sydney is usually 16 hours ahead of Chicago. Both observe daylight saving time, so the difference shifts by an hour for a few weeks around the spring and autumn changeovers.

SydneyChicago

Sunrise 6:09 AMSunset 7:12 PM(local)

Sunrise 7:08 AMSunset 6:04 PM(local)

Sydney: daylight saving timeNow UTC+11. Next change: April 4, 2027 β€” clocks go back 1 hour.
Chicago: daylight saving timeNow UTC-5 CDT. Next change: November 1, 2026 β€” clocks go back 1 hour.
SydneyUTC+11
ChicagoUTC-5CDT

πŸ‡¦πŸ‡Ί Sydney

Dialing code+61
Population5,557,233
Coordinates33.87Β°S, 151.21Β°E
Elevation58 m

πŸ‡ΊπŸ‡Έ Chicago

Dialing code+1
Population2,664,452
Coordinates41.85Β°N, 87.65Β°W
Elevation179 m

Best time for a call: 09:00–10:00 in SydneyAdd to calendar

1 November 2026 β€” 3 April 2027: the gap is 17h instead of the usual 16h β€” Sydney and Chicago change clocks on different days.

Working hours assumed 9:00–18:00.

Frequently asked questions

What is the time difference between Sydney and Chicago?
Sydney is 16 hours ahead of Chicago. Use the side-by-side clocks and the day/night strips above to convert any hour between them.
When is the best time to call between Sydney and Chicago?
The best window to call is 09:00–10:00 Sydney time, when working hours overlap in both cities. Pick an hour on the strips to add it to your calendar.
Why does the time difference between Sydney and Chicago change?
Because Sydney and Chicago switch to or from daylight saving time on different dates, the gap between them is temporarily larger or smaller for a few weeks around those changes.