Seattle and Sydney working-hours overlap
Sydney is 17 hours ahead of Seattle. 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 Seattle local time.
Hour by hour
Every hour either city is working, and what the clock reads on both sides.
| Seattle | Sydney | Status |
|---|---|---|
| 09:00 | 02:00 | Seattle only |
| 10:00 | 03:00 | Seattle only |
| 11:00 | 04:00 | Seattle only |
| 12:00 | 05:00 | Seattle only |
| 13:00 | 06:00 | Seattle only |
| 14:00 | 07:00 | Seattle only |
| 15:00 | 08:00 | Seattle only |
| 16:00 | 09:00 | Both available |
| 17:00 | 10:00 | Sydney only |
| 18:00 | 11:00 | Sydney only |
| 19:00 | 12:00 | Sydney only |
| 20:00 | 13:00 | Sydney only |
| 21:00 | 14:00 | Sydney only |
| 22:00 | 15:00 | Sydney only |
| 23:00 | 16:00 | Sydney only |
Best time to call Sydney from Seattle
Sydney is 17 hours ahead of Seattle. Calling Sydney from Seattle works best between 16:00–17:00 Seattle time, which lands at 09:00–10:00 for Sydney. The shared window does not open until the Seattle afternoon, so mornings there are effectively solo working time.
There are only 1 hour where both cities are working, so the window is effectively one short call. Booking anything longer means someone stays late.
Avoid the first and last fifteen minutes of that range. Those edges are where one side is either still settling in or already packing up, and a call that runs five minutes over pushes someone past the end of their day.
Recommended window
16:00–17:00 in Seattle = 09:00–10:00 in Sydney · 1 hour available
Cross-timezone workday overlap and collaboration
With so little shared time, Seattle and Sydney 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; 17 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
- Book recurring meetings inside 16:00–17:00 Seattle time and leave the rest of the day for focused work.
- Keep the first hour after Sydney comes online free of meetings, so anything blocking overnight gets picked up immediately.
- Do not stack two meetings in the window — there is not room, and the second will overrun into someone's evening.
Frequently asked questions (Seattle & Sydney)
What is the current time difference between Seattle and Sydney?
Sydney is 17 hours ahead of Seattle. 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 Seattle and Sydney?
Schedule it inside 16:00–17:00 Seattle time, which is 09:00–10:00 in Sydney. That range is 1 hour long, so a one-hour meeting fits but leaves little margin.
Do Seattle and Sydney change their clocks on the same date?
No. Seattle changes on Sun, Nov 1 and Sydney on Sun, Oct 4. 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 Seattle and Sydney actually share in a working day?
Comparing a standard 9:00–17:00 day in each city gives 1 hour of shared working time. Widening either side's hours, or adding a split evening shift, increases it.
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 Sydney.
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