Chicago time to Sydney time
Sydney is 17 hours ahead of Chicago in January and 15 hours ahead of in July (Chicago GMT-5/UTC−05:00 in summer; Sydney GMT+10/UTC+10:00). Enter a Chicago time below to convert it, or leave it blank to see the current time in both cities.
How to use the Chicago to Sydney time
- Type a Chicago time (24-hour) and optionally a date, or leave blank for now.
- Click Convert.
- Read the Sydney time and the working-hours table.
Time difference between Chicago and Sydney
Sydney is 17 hours ahead of Chicago in January and 15 hours ahead of in July. Both Chicago and Sydney observe daylight saving time, but they change clocks on different dates, so for a few weeks each spring and autumn the difference shifts by an hour. Chicago uses America/Chicago time (UTC−06:00 in January, UTC−05:00 in July); Sydney uses Australia/Sydney (UTC+11:00 in January, UTC+10:00 in July).
Working week in Chicago and Sydney
Chicago: Central Time, one hour behind New York: CDT (UTC−5) in summer, CST (UTC−6) in winter. Weekend Saturday–Sunday.
Sydney: Australian Eastern Time: AEDT (UTC+11) from the first Sunday of October to the first Sunday of April, otherwise AEST (UTC+10). Office hours 09:00–17:00, weekend Saturday–Sunday.
Quick conversion table (summer difference)
| Chicago | Sydney |
|---|---|
| 08:00 | 23:00 |
| 09:00 | 00:00 (next day) |
| 10:00 | 01:00 (next day) |
| 12:00 | 03:00 (next day) |
| 14:00 | 05:00 (next day) |
| 16:00 | 07:00 (next day) |
| 18:00 | 09:00 (next day) |
| 20:00 | 11:00 (next day) |
| 22:00 | 13:00 (next day) |
Table uses the July difference; the tool above applies the exact rule for any date.
Best time to call between Chicago and Sydney
Within normal office hours (09:00–18:00) in both cities: no overlap within 09:00–18:00; one side must take an early or late call. For a compromise outside that window, the fairest slots are the ones nearest each side's start or end of day, alternating who takes the inconvenient hour.
Reverse
Need the other direction? See Sydney to Chicago, or the general time zone converter.
Frequently asked questions
How many hours ahead is Sydney from Chicago?
Sydney is 17 hours ahead of Chicago in January and 15 hours ahead of in July.
When it is 12:00 noon in Chicago, what time is it in Sydney?
03:00 in summer (); use the tool for a specific date.
Does the converter handle daylight saving?
Yes, for the exact date you enter, using the IANA time-zone rules in your browser.
Privacy
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Last updated 2026-09-23.