Working hours from Sydney to Chicago
Chicago is 15 hours behind Sydney. The comparison below uses a standard 9:00–17:00 day in each city, calculated from the IANA time zone database so daylight saving is already accounted for. The clocks update live in your browser.
A full day, side by side
Each row runs midnight to midnight in that city's own local time.
Hours labelled in Sydney local time.
No shared hours. A standard Sydney workday and a standard Chicago workday never coincide, which is why the bar above is empty. The table below shows how close the two get.
Hour by hour
Every hour either city is working, and what the clock reads on both sides.
| Sydney | Chicago | Status |
|---|---|---|
| 00:00 | 09:00 | Chicago only |
| 01:00 | 10:00 | Chicago only |
| 02:00 | 11:00 | Chicago only |
| 03:00 | 12:00 | Chicago only |
| 04:00 | 13:00 | Chicago only |
| 05:00 | 14:00 | Chicago only |
| 06:00 | 15:00 | Chicago only |
| 07:00 | 16:00 | Chicago only |
| 09:00 | 18:00 | Sydney only |
| 10:00 | 19:00 | Sydney only |
| 11:00 | 20:00 | Sydney only |
| 12:00 | 21:00 | Sydney only |
| 13:00 | 22:00 | Sydney only |
| 14:00 | 23:00 | Sydney only |
| 15:00 | 00:00 | Sydney only |
| 16:00 | 01:00 | Sydney only |
Best time to call Chicago from Sydney
A standard 9:00–17:00 day in Sydney does not intersect a standard day in Chicago at all. Chicago is 15 hours behind Sydney. Whoever joins the call is stepping outside their working hours, so the fair thing is to alternate who takes the inconvenient slot.
The least disruptive options are the edges: early morning in Sydney before Chicago finishes for the evening, or late afternoon in Sydney once Chicago is starting the next day. Anything in the middle lands in someone's night.
Cross-timezone workday overlap and collaboration
With so little shared time, Sydney and Chicago work best as an asynchronous pair with one synchronous exception. Write decisions down as they are made rather than saving them for a call, because the next chance to talk is a day away.
Treat the gap as a handoff rather than a delay. Whoever finishes first should leave the next step written down and unambiguous; 15 hours later the other side picks it up without needing to ask a question that would cost another full day.
Watch for fatigue on recurring meetings. A weekly call that sits at the very edge of someone's evening is tolerable once and corrosive after a month. If the only workable slot is uncomfortable for one side, rotate it, or accept that the meeting should be a document instead.
Practical rules for this pairing
- Rotate who takes the out-of-hours call, rather than defaulting to the same side every week.
- Move status updates into writing entirely — there is no hour where a live update is cheap for both sides.
- If the pairing is permanent, a split shift on one side buys back a real overlap.
Frequently asked questions (Sydney & Chicago)
What is the current time difference between Sydney and Chicago?
Chicago is 15 hours behind Sydney. That gap is calculated from the live IANA time zone database, so it already accounts for whichever daylight-saving rules are in force today rather than assuming a fixed offset.
What is the best window for a one-hour team sync between Sydney and Chicago?
There is no window where a standard 9:00–17:00 day in Sydney overlaps one in Chicago, so a one-hour sync has to sit outside someone's working hours. Alternate which side absorbs it, or replace the meeting with a written handoff.
Do Sydney and Chicago change their clocks on the same date?
No. Sydney changes on Sun, Oct 4 and Chicago on Sun, Nov 1. Between those two dates the usual difference is off by an hour, which is the period recurring meetings quietly drift in.
How many hours do Sydney and Chicago actually share in a working day?
None. A standard 9:00–17:00 day in Sydney and the same in Chicago do not intersect, which is why teams spanning these two cities usually adopt a split shift on one side.
Plan it with your real hours
These figures assume a 9-to-17 on both sides. Drag in your actual shifts, add a split evening block, and generate a booking link for Chicago.
Open the overlap engine →