Time Difference Between Australia and Hawaii Time
As of 12 October 2026, Hawaii Time is 21 hours behind Australia. That number is not constant. Over the course of a year, because of daylight saving changes, Hawaii Time, United States ranges from 21 hours behind to 20 hours behind relative to Sydney, Australia. The calculator below is always up to date.
Comparing other zones inside the country? See all seven US time zones side by side.
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Sydney, Australia
23:45
Mon, Oct 12, 2026
UTC+11 · Australia/Sydney
Hawaii Time, United States
-21h
02:45
Mon, Oct 12, 2026
UTC-10 · HST · Pacific/Honolulu
Hawaii Time is 21 hours behind Australia.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| Australia | Monday, October 12, 2026 | Australia/Sydney | UTC+11 | Active now |
| Hawaii Time | Monday, October 12, 2026 | HSTPacific/Honolulu | UTC-10 | Not observed |
Australia: Australia has several time zones and only some states use daylight saving. This page uses Eastern Time (Sydney, Melbourne); Perth is 2 to 3 hours behind.
Hawaii Time: Covers Hawaii. Stays at UTC-10 all year — Hawaii does not observe daylight saving time.
Hour by hour: Australia to Hawaii Time
Every hour of today in Australia and what it is in Hawaii Time. Highlighted rows fall inside Hawaii Time working hours (09:00–18:00).
| Australia | Hawaii Time |
|---|---|
| 00:00 | 03:00prev day |
| 01:00 | 04:00prev day |
| 02:00 | 05:00prev day |
| 03:00 | 06:00prev day |
| 04:00 | 07:00prev day |
| 05:00 | 08:00prev day |
| 06:00 | 09:00prev day |
| 07:00 | 10:00prev day |
| 08:00 | 11:00prev day |
| 09:00 | 12:00prev day |
| 10:00 | 13:00prev day |
| 11:00 | 14:00prev day |
| Australia | Hawaii Time |
|---|---|
| 12:00 | 15:00prev day |
| 13:00 | 16:00prev day |
| 14:00 | 17:00prev day |
| 15:00 | 18:00prev day |
| 16:00 | 19:00prev day |
| 17:00 | 20:00prev day |
| 18:00 | 21:00prev day |
| 19:00 | 22:00prev day |
| 20:00 | 23:00prev day |
| 21:00 | 00:00 |
| 22:00 | 01:00 |
| 23:00 | 02:00 |
Best time to call or meet
Overlapping working hours
09:00–15:00 in Australia (12:00–18:00 in Hawaii Time)
Both places are inside 09:00–18:00 for 6 hours a day. Anything in this window works without asking anyone to stay late.
Reasonable calling hours
08:00–18:00 in Australia (11:00–21:00 in Hawaii Time)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
Australia puts its clocks back on Sunday, April 4, 2027
The local offset moves from UTC+11 to UTC+10. After that date, Hawaii Time is 20 hours behind Australia — instead of 21 hours behind, as it is today.
Planning something with more than two places?
Adding a third city usually kills the obvious answer. The Meeting Time Finder takes up to five cities at once and shows only the hours that work for everybody.
Australia and Hawaii Time: common questions
What is the time difference between Australia and Hawaii Time?
As of 12 October 2026, Hawaii Time is 21 hours behind Australia. The gap is not fixed: across the year, Hawaii Time ranges from 21 hours behind to 20 hours behind relative to Australia, as clocks change. The calculator on this page always shows the difference for right now.
When it is 9:00 AM in Australia, what time is it in Hawaii Time?
It is 12:00 PM in Hawaii Time, United States. Use the time field in the calculator above to check any other hour.
Is Hawaii Time ahead of or behind Australia?
Hawaii Time is behind Australia by 21 hours at the moment. In practical terms, the working day in Hawaii Time starts and ends later in Australia terms.
Do Australia and Hawaii Time observe daylight saving time?
Australia changes its clocks twice a year; Hawaii Time does not. The difference therefore shifts by an hour when Australia switches: across the year, Hawaii Time ranges from 21 hours behind to 20 hours behind relative to Australia.
What is the best time to call Hawaii Time from Australia?
Working hours overlap between 09:00 and 15:00 Australia time, which is 12:00 to 18:00 in Hawaii Time. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for Sydney, Australia (UTC+11) and Hawaii Time, United States (UTC-10) were generated on Monday, October 12, 2026 UTC and refresh in your browser.