Time difference between Chicago and Sydney

Sydney is 15 hours ahead of Chicago

Chicago, the United States is UTC−6 · Sydney, Australia is UTC+10 — on standard time

The gap is not the same all year

Every converter gives one number for this pair. That number is right for most of the year and wrong for part of it, because Chicago goes forward on the second Sunday in March and back on the first Sunday in November and Sydney goes forward on the first Sunday in October and back on the first Sunday in April.

These two are in opposite hemispheres, so their summers do not overlap: Chicago is on summer time roughly when Sydney is not. The gap does not wobble by an hour around a settled figure — it swings between 15 hours and 17 hours and spends a good part of the year at each. There is no single right answer to give a calendar, which is why a recurring meeting between them is worth setting in one city's local time and letting the other side see it move.

When they can both be at their desks

Nine-to-five in Chicago and nine-to-five in Sydney do not overlap at all. With 15 hours between them, one side is always outside working hours, and the practical question is which side takes the early start or the late finish rather than when to meet.

Chicago to Sydney, hour by hour

On the usual gap of 15 hours.

Frequently asked questions

Other pairs

• Chicago to Melbourne
• Chicago to Auckland
• Chicago to New York
• Chicago to Toronto
• Chicago to Denver
• Chicago to Los Angeles
• Chicago to Vancouver
• Chicago to Anchorage
• Chicago to Honolulu
• Chicago to São Paulo

Every Chicago pair · Every Sydney pair · All city pairs · Time zones by abbreviation