Time Difference Between Chicago and Sydney
Sydney is 17h ahead of Chicago during daylight saving time in Sydney, while Chicago is on standard time. Sydney is 16h ahead of Chicago during daylight saving time in both cities. Sydney is 15h ahead of Chicago during daylight saving time in Chicago, while Sydney is on standard time.
Chicago clocks move forward on the second Sunday of March and back on the first Sunday of November. Sydney clocks move forward on the first Sunday of October and back on the first Sunday of April. The figures above cover each part of the year. They do not come from the offset on the day the site was built. The live clocks use the current time.
Working Hours Overlap
For each hour of Chicago's working day (9:00-18:00), here is the corresponding local time in Sydney. Rows highlighted green fall within standard working hours (9:00-18:00) in both cities. Each block is one part of the year, so the table does not change with the day this page was built.
17h ahead (daylight saving time in Sydney, while Chicago is on standard time)
| Chicago | Sydney | Both working hours? |
|---|---|---|
| 9 AM | 2 AM | No |
| 10 AM | 3 AM | No |
| 11 AM | 4 AM | No |
| 12 PM | 5 AM | No |
| 1 PM | 6 AM | No |
| 2 PM | 7 AM | No |
| 3 PM | 8 AM | No |
| 4 PM | 9 AM | Yes |
| 5 PM | 10 AM | Yes |
| 6 PM | 11 AM | No |
16h ahead (daylight saving time in both cities)
| Chicago | Sydney | Both working hours? |
|---|---|---|
| 9 AM | 1 AM | No |
| 10 AM | 2 AM | No |
| 11 AM | 3 AM | No |
| 12 PM | 4 AM | No |
| 1 PM | 5 AM | No |
| 2 PM | 6 AM | No |
| 3 PM | 7 AM | No |
| 4 PM | 8 AM | No |
| 5 PM | 9 AM | Yes |
| 6 PM | 10 AM | No |
15h ahead (daylight saving time in Chicago, while Sydney is on standard time)
| Chicago | Sydney | Both working hours? |
|---|---|---|
| 9 AM | 12 AM | No |
| 10 AM | 1 AM | No |
| 11 AM | 2 AM | No |
| 12 PM | 3 AM | No |
| 1 PM | 4 AM | No |
| 2 PM | 5 AM | No |
| 3 PM | 6 AM | No |
| 4 PM | 7 AM | No |
| 5 PM | 8 AM | No |
| 6 PM | 9 AM | No |
Best Time to Meet
17h ahead (daylight saving time in Sydney, while Chicago is on standard time)
- 4 PM-6 PM in Chicago (9 AM-11 AM in Sydney) works for both sides. It falls within 9 AM-6 PM in both time zones.
16h ahead (daylight saving time in both cities)
- 5 PM-6 PM in Chicago (9 AM-10 AM in Sydney) works for both sides. It falls within 9 AM-6 PM in both time zones.
15h ahead (daylight saving time in Chicago, while Sydney is on standard time)
Chicago and Sydney don't share a 9 AM-6 PM working-hours window during daylight saving time in Chicago, while Sydney is on standard time. The least disruptive compromise is around 3 PM in Chicago, which falls at 6 AM in Sydney. Expect one side to take an early or late call.
How the Difference Changes
The two cities do not change their clocks on the same dates, so the gap is not one number. The rules are above. The dates for the year you are reading this page load below.
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Chicago
Chicago uses the America/Chicago time zone. Standard time is UTC-6, and daylight saving time is UTC-5.
Sydney
Sydney uses the Australia/Sydney time zone. Standard time is UTC+10, and daylight saving time is UTC+11.