Sydney and Chicago: Real-Time Clock
Sydney leads by 15 hours
Quick time conversions: Sydney → Chicago
Common reference points to help you plan across the time difference.
A 5:00 PM start in Sydney means 2:00 AM for your contact in Chicago.
Is 3:00 PM a good time to call Chicago from Sydney?—12:00 AM
7:00 AMin Sydney→4:00 PMin Chicago(-1 day)
If it's 6:00 PM in Sydney, it's 3:00 AM in Chicago.
9:00 AMin Sydney→6:00 PMin Chicago(-1 day)
Sydney ↔ Chicago
No overlap — one side will join outside working hours· Showing afternoon hours (12:00–20:00)
Sydney
Chicago
Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.
Frequently Asked Questions
How many hours difference between Sydney and Chicago?
The offset is 15 hours — Sydney is ahead of Chicago. Timezones: Australia/Sydney and America/Chicago.
Can I find a standard business hour that suits both Sydney and Chicago?
No mutual business hours exist between Sydney and Chicago. The 15 hours difference pushes them into completely separate workdays.
Will daylight saving affect my Sydney–Chicago meetings this week?
The 15 hours difference between Sydney and Chicago is stable — no DST changes expected in the next 7 days.
When Sydney reaches noon, what time is it in Chicago?
Noon in Sydney corresponds to 9:00 PM in Chicago.
What tools help schedule across Sydney and Chicago?
The live slider at the top converts any Sydney time to Chicago instantly. You can also type natural language like "9am" or "15:30".
Does Sydney have holidays coming up that could affect scheduling?
Watch out for Picnic Day in Sydney on August 3 — offices may be closed or understaffed.
Which UTC offsets do Sydney and Chicago follow?
Sydney observes Australia/Sydney and Chicago observes America/Chicago. Their UTC offset difference is 15 hours.
If I send an email at 5:00 PM Sydney time, when does my contact in Chicago receive it?
5 PM Sydney → 2:00 AM Chicago. Your Chicago contact won't see it until their workday begins.