🇦🇺 Sydney ↔ 🇺🇸 Chicago

Sydney is usually 15 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.

Sunrise 7:01 AMSunset 4:55 PM(local)

Sunrise 5:17 AMSunset 8:30 PM(local)

Sydney: standard timeNow UTC+10. Next change: October 4, 2026 — clocks go forward 1 hour.
Chicago: daylight saving timeNow UTC-5 CDT. Next change: November 1, 2026 — clocks go back 1 hour.
SydneyUTC+10
ChicagoUTC-5CDT

🇦🇺 Sydney

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

🇺🇸 Chicago

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

No comfortable common working hours — these cities barely overlap.

3 October 2026 — 1 November 2026: the gap is 16h instead of the usual 15h — 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 15 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?
There is no hour when standard working hours (9:00–18:00) overlap in both Sydney and Chicago, so any call falls outside business hours for at least one side.
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.