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