Honolulu zone
HST (GMT-10)
Tokyo zone
GMT+9 (GMT+9)
Difference
19 hours ahead of Honolulu
Business overlap
3h (9-5 windows)
Working hours overlap
Each cell is one hour in Honolulu. Filled cells mark when 9 AM – 5 PM in Honolulu and Tokyo both apply.
3 hours per day
- Honolulu
- GMT-10
- Tokyo
- GMT+9
- Difference
- +19h
- Business overlap
- 3h
Hour-by-hour conversion
Each row shows the matching local time in Tokyo for an hour in Honolulu.
| Honolulu | Tokyo | Day | Window |
|---|---|---|---|
| 12:00 AM | 7:00 PM | same day | — |
| 1:00 AM | 8:00 PM | same day | — |
| 2:00 AM | 9:00 PM | same day | — |
| 3:00 AM | 10:00 PM | same day | — |
| 4:00 AM | 11:00 PM | same day | — |
| 5:00 AM | 12:00 AM | next day | — |
| 6:00 AM | 1:00 AM | next day | — |
| 7:00 AM | 2:00 AM | next day | — |
| 8:00 AM | 3:00 AM | next day | — |
| 9:00 AM | 4:00 AM | next day | — |
| 10:00 AM | 5:00 AM | next day | — |
| 11:00 AM | 6:00 AM | next day | — |
| 12:00 PM | 7:00 AM | next day | — |
| 1:00 PM | 8:00 AM | next day | — |
| 2:00 PM | 9:00 AM | next day | Both 9-5 |
| 3:00 PM | 10:00 AM | next day | Both 9-5 |
| 4:00 PM | 11:00 AM | next day | Both 9-5 |
| 5:00 PM | 12:00 PM | next day | — |
| 6:00 PM | 1:00 PM | next day | — |
| 7:00 PM | 2:00 PM | next day | — |
| 8:00 PM | 3:00 PM | next day | — |
| 9:00 PM | 4:00 PM | next day | — |
| 10:00 PM | 5:00 PM | next day | — |
| 11:00 PM | 6:00 PM | next day | — |
Best meeting windows
If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 2:00 PM – 5:00 PM in Honolulu time. That gives you 3 hours per workday for live meetings.
Tighter overlap is achievable by having the side with later working hours start earlier, or by treating the first and last hours of each side as flexible. The bar above marks every hour where both cities sit inside a 9 AM – 5 PM window.
About converting Honolulu time to Tokyo time
Honolulu follows the Pacific/Honolulu time zone (currently HST, GMT-10), while Tokyo follows Asia/Tokyo (currently GMT+9, GMT+9). Tokyo is 19 hours ahead of Honolulu right now.
Neither city observes daylight saving time, so the offset between them is the same all year.
Reverse this conversion
Tokyo to Honolulu
Open the converter
Plan a meeting between Honolulu and Tokyo
More conversions from Honolulu
Frequently asked questions
- How many hours is Honolulu from Tokyo?
- Tokyo is 19 hours ahead of Honolulu right now.
- What time is 9:00 AM Honolulu in Tokyo?
- 9:00 AM in Honolulu is 4:00 AM (next day) in Tokyo.
- What time is 5:00 PM Honolulu in Tokyo?
- 5:00 PM in Honolulu is 12:00 PM (next day) in Tokyo.
- When do Honolulu and Tokyo business hours overlap?
- Standard 9 AM - 5 PM working hours overlap for about 3 hours, roughly from 2:00 PM to 5:00 PM in Honolulu time.
- Does daylight saving time change the difference between Honolulu and Tokyo?
- Neither Honolulu nor Tokyo observes daylight saving time, so the offset between them is constant year-round.
Local time page
Time in Honolulu
Local time page
Time in Tokyo