Honolulu zone
HST (GMT-10)
Sydney zone
GMT+10 (GMT+10)
Difference
20 hours ahead of Honolulu
Business overlap
4h (9-5 windows)
Working hours overlap
Each cell is one hour in Honolulu. Filled cells mark when 9 AM – 5 PM in Honolulu and Sydney both apply.
4 hours per day
- Honolulu
- GMT-10
- Sydney
- GMT+10
- Difference
- +20h
- Business overlap
- 4h
Hour-by-hour conversion
Each row shows the matching local time in Sydney for an hour in Honolulu.
| Honolulu | Sydney | Day | Window |
|---|---|---|---|
| 12:00 AM | 8:00 PM | same day | — |
| 1:00 AM | 9:00 PM | same day | — |
| 2:00 AM | 10:00 PM | same day | — |
| 3:00 AM | 11:00 PM | same day | — |
| 4:00 AM | 12:00 AM | next day | — |
| 5:00 AM | 1:00 AM | next day | — |
| 6:00 AM | 2:00 AM | next day | — |
| 7:00 AM | 3:00 AM | next day | — |
| 8:00 AM | 4:00 AM | next day | — |
| 9:00 AM | 5:00 AM | next day | — |
| 10:00 AM | 6:00 AM | next day | — |
| 11:00 AM | 7:00 AM | next day | — |
| 12:00 PM | 8:00 AM | next day | — |
| 1:00 PM | 9:00 AM | next day | Both 9-5 |
| 2:00 PM | 10:00 AM | next day | Both 9-5 |
| 3:00 PM | 11:00 AM | next day | Both 9-5 |
| 4:00 PM | 12:00 PM | next day | Both 9-5 |
| 5:00 PM | 1:00 PM | next day | — |
| 6:00 PM | 2:00 PM | next day | — |
| 7:00 PM | 3:00 PM | next day | — |
| 8:00 PM | 4:00 PM | next day | — |
| 9:00 PM | 5:00 PM | next day | — |
| 10:00 PM | 6:00 PM | next day | — |
| 11:00 PM | 7:00 PM | next day | — |
Best meeting windows
If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 1:00 PM – 5:00 PM in Honolulu time. That gives you 4 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 Sydney time
Honolulu follows the Pacific/Honolulu time zone (currently HST, GMT-10), while Sydney follows Australia/Sydney (currently GMT+10, GMT+10). Sydney is 20 hours ahead of Honolulu right now.
Sydney observes daylight saving time, while Honolulu does not. The offset between the two cities changes by one hour at the daylight saving transitions.
Daylight saving transitions in 2026
Honolulu
Does not observe daylight saving time.
Sydney
- Fall back · Sunday, April 5, 2026
- Spring forward · Sunday, October 4, 2026
Reverse this conversion
Sydney to Honolulu
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Frequently asked questions
- How many hours is Honolulu from Sydney?
- Sydney is 20 hours ahead of Honolulu right now.
- What time is 9:00 AM Honolulu in Sydney?
- 9:00 AM in Honolulu is 5:00 AM (next day) in Sydney.
- What time is 5:00 PM Honolulu in Sydney?
- 5:00 PM in Honolulu is 1:00 PM (next day) in Sydney.
- When do Honolulu and Sydney business hours overlap?
- Standard 9 AM - 5 PM working hours overlap for about 4 hours, roughly from 1:00 PM to 5:00 PM in Honolulu time.
- Does daylight saving time change the difference between Honolulu and Sydney?
- Sydney observes daylight saving time while Honolulu does not, so the offset between them changes by one hour twice a year.
Local time page
Time in Honolulu
Local time page
Time in Sydney