Time Difference Between Hawaii Time and Japan
As of 31 August 2026, Japan is 19 hours ahead of Hawaii Time. This difference is fixed: neither zone shifts its clocks against the other, so it holds all year.
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Hawaii Time, United States
12:34
Mon, Aug 31, 2026
UTC-10 · HST · Pacific/Honolulu
Tokyo, Japan
+19h07:34
Tue, Sep 1, 2026
UTC+9 · Asia/Tokyo
Japan is 19 hours ahead of Hawaii Time.
When it is 12:34 in Hawaii Time, it is already the next day in Japan.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| Hawaii Time | Monday, August 31, 2026 | HSTPacific/Honolulu | UTC-10 | Not observed |
| Japan | Tuesday, September 1, 2026 | Asia/Tokyo | UTC+9 | Not observed |
Hawaii Time: Covers Hawaii. Stays at UTC-10 all year — Hawaii does not observe daylight saving time.
Hour by hour: Hawaii Time to Japan
Every hour of today in Hawaii Time and what it is in Japan. Highlighted rows fall inside Japan working hours (09:00–18:00).
| Hawaii Time | Japan |
|---|---|
| 00:00 | 19:00 |
| 01:00 | 20:00 |
| 02:00 | 21:00 |
| 03:00 | 22:00 |
| 04:00 | 23:00 |
| 05:00 | 00:00next day |
| 06:00 | 01:00next day |
| 07:00 | 02:00next day |
| 08:00 | 03:00next day |
| 09:00 | 04:00next day |
| 10:00 | 05:00next day |
| 11:00 | 06:00next day |
| Hawaii Time | Japan |
|---|---|
| 12:00 | 07:00next day |
| 13:00 | 08:00next day |
| 14:00 | 09:00next day |
| 15:00 | 10:00next day |
| 16:00 | 11:00next day |
| 17:00 | 12:00next day |
| 18:00 | 13:00next day |
| 19:00 | 14:00next day |
| 20:00 | 15:00next day |
| 21:00 | 16:00next day |
| 22:00 | 17:00next day |
| 23:00 | 18:00next day |
Best time to call or meet
Overlapping working hours
14:00–18:00 in Hawaii Time (09:00–13:00 in Japan)
Both places are inside 09:00–18:00 for 4 hours a day. Anything in this window works without asking anyone to stay late.
Reasonable calling hours
13:00–21:00 in Hawaii Time (08:00–16:00 in Japan)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
Neither Hawaii Time nor Japan changes its clocks, so the difference of 19 hours stays the same all year.
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 Japan: common questions
What is the time difference between Hawaii Time and Japan?
Japan is 19 hours ahead of Hawaii Time, and this does not change during the year because the difference between these two zones is fixed.
When it is 9:00 AM in Hawaii Time, what time is it in Japan?
It is 04:00 AM in Tokyo, Japan. Use the time field in the calculator above to check any other hour.
Is Japan ahead of or behind Hawaii Time?
Japan is ahead of Hawaii Time by 19 hours at the moment. In practical terms, the working day in Japan starts and ends earlier in Hawaii Time terms.
Do Hawaii Time and Japan observe daylight saving time?
Neither Hawaii Time nor Japan observes daylight saving time, so the difference stays at 19 hours all year.
What is the best time to call Japan from Hawaii Time?
Working hours overlap between 14:00 and 18:00 Hawaii Time time, which is 09:00 to 13:00 in Japan. 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 Tokyo, Japan (UTC+9) were generated on Monday, August 31, 2026 UTC and refresh in your browser.