Time Difference Between Hawaii Time and Australia
As of 12 October 2026, Australia is 21 hours ahead of Hawaii Time. That number is not constant. Over the course of a year, because of daylight saving changes, Sydney, Australia ranges from 20 hours ahead to 21 hours ahead relative to Hawaii Time, United States. The calculator below is always up to date.
Comparing other zones inside the country? See all seven US time zones side by side.
Tap either box to search any country or city.
Hawaii Time, United States
02:45
Mon, Oct 12, 2026
UTC-10 · HST · Pacific/Honolulu
Sydney, Australia
+21h
23:45
Mon, Oct 12, 2026
UTC+11 · Australia/Sydney
Australia is 21 hours ahead of Hawaii Time.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| Hawaii Time | Monday, October 12, 2026 | HSTPacific/Honolulu | UTC-10 | Not observed |
| Australia | Monday, October 12, 2026 | Australia/Sydney | UTC+11 | Active now |
Hawaii Time: Covers Hawaii. Stays at UTC-10 all year — Hawaii does not observe daylight saving time.
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.
Hour by hour: Hawaii Time to Australia
Every hour of today in Hawaii Time and what it is in Australia. Highlighted rows fall inside Australia working hours (09:00–18:00).
| Hawaii Time | Australia |
|---|---|
| 00:00 | 21:00 |
| 01:00 | 22:00 |
| 02:00 | 23:00 |
| 03:00 | 00:00next day |
| 04:00 | 01:00next day |
| 05:00 | 02:00next day |
| 06:00 | 03:00next day |
| 07:00 | 04:00next day |
| 08:00 | 05:00next day |
| 09:00 | 06:00next day |
| 10:00 | 07:00next day |
| 11:00 | 08:00next day |
| Hawaii Time | Australia |
|---|---|
| 12:00 | 09:00next day |
| 13:00 | 10:00next day |
| 14:00 | 11:00next day |
| 15:00 | 12:00next day |
| 16:00 | 13:00next day |
| 17:00 | 14:00next day |
| 18:00 | 15:00next day |
| 19:00 | 16:00next day |
| 20:00 | 17:00next day |
| 21:00 | 18:00next day |
| 22:00 | 19:00next day |
| 23:00 | 20:00next day |
Best time to call or meet
Overlapping working hours
12:00–18:00 in Hawaii Time (09:00–15:00 in Australia)
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
11:00–21:00 in Hawaii Time (08:00–18:00 in Australia)
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, Australia is 20 hours ahead of Hawaii Time — instead of 21 hours ahead, 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.
Hawaii Time and Australia: common questions
What is the time difference between Hawaii Time and Australia?
As of 12 October 2026, Australia is 21 hours ahead of Hawaii Time. The gap is not fixed: across the year, Australia ranges from 20 hours ahead to 21 hours ahead relative to Hawaii Time, as clocks change. The calculator on this page always shows the difference for right now.
When it is 9:00 AM in Hawaii Time, what time is it in Australia?
It is 06:00 AM in Sydney, Australia. Use the time field in the calculator above to check any other hour.
Is Australia ahead of or behind Hawaii Time?
Australia is ahead of Hawaii Time by 21 hours at the moment. In practical terms, the working day in Australia starts and ends earlier in Hawaii Time terms.
Do Hawaii Time and Australia 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, Australia ranges from 20 hours ahead to 21 hours ahead relative to Hawaii Time.
What is the best time to call Australia from Hawaii Time?
Working hours overlap between 12:00 and 18:00 Hawaii Time time, which is 09:00 to 15:00 in Australia. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for Hawaii Time, United States (UTC-10) and Sydney, Australia (UTC+11) were generated on Monday, October 12, 2026 UTC and refresh in your browser.