Honolulu is currently 20 hours behind Sydney. Convert time between Honolulu and Sydney, see the exact difference, and find the best hours for calls and meetings.
Honolulu uses Hawaii-Aleutian Standard Time. Sydney uses Australian Eastern Standard Time. Honolulu time is 20 hours behind Sydney. So, when it is 12:00 AM in Honolulu, it is 8:00 PM in Sydney.
Common Honolulu times and their Sydney equivalents.
| Honolulu Time | Sydney Time |
|---|---|
| 12:00 AM Honolulu | 8:00 PM Sydney |
| 1:00 AM Honolulu | 9:00 PM Sydney |
| 2:00 AM Honolulu | 10:00 PM Sydney |
| 3:00 AM Honolulu | 11:00 PM Sydney |
| 4:00 AM Honolulu | 12:00 AM Sydney |
| 5:00 AM Honolulu | 1:00 AM Sydney |
| 6:00 AM Honolulu | 2:00 AM Sydney |
| 7:00 AM Honolulu | 3:00 AM Sydney |
| 8:00 AM Honolulu | 4:00 AM Sydney |
| 9:00 AM Honolulu | 5:00 AM Sydney |
| 10:00 AM Honolulu | 6:00 AM Sydney |
| 11:00 AM Honolulu | 7:00 AM Sydney |
| 12:00 PM Honolulu | 8:00 AM Sydney |
| 1:00 PM Honolulu | 9:00 AM Sydney |
| 2:00 PM Honolulu | 10:00 AM Sydney |
| 3:00 PM Honolulu | 11:00 AM Sydney |
| 4:00 PM Honolulu | 12:00 PM Sydney |
| 5:00 PM Honolulu | 1:00 PM Sydney |
| 6:00 PM Honolulu | 2:00 PM Sydney |
| 7:00 PM Honolulu | 3:00 PM Sydney |
| 8:00 PM Honolulu | 4:00 PM Sydney |
| 9:00 PM Honolulu | 5:00 PM Sydney |
| 10:00 PM Honolulu | 6:00 PM Sydney |
| 11:00 PM Honolulu | 7:00 PM Sydney |
Honolulu uses Hawaii-Aleutian Standard Time (HST, UTC−10). No Daylight Saving Time is observed — the offset is fixed year-round.
Sydney uses Australian Eastern Standard Time (AEST, UTC+10) in winter and Australian Eastern Daylight Time (AEDT, UTC+11) in summer. Because Australia is in the Southern Hemisphere, its summer runs October–April — the opposite of the Northern Hemisphere. Clocks go forward on the first Sunday of October and back on the first Sunday of April.
Both Honolulu and Sydney may observe Daylight Saving Time, which means the offset between them can change twice a year. Here is what to expect each season.
| Period | Note | Honolulu | Sydney | Offset |
|---|---|---|---|---|
| Nov – Mar | Both on standard time | HST (UTC−10) | GMT+11 (UTC+11) | 21 hours |
| Mar – late Mar | US clocks forward, some zones still on standard | HST (UTC−10) | GMT+11 (UTC+11) | 21 hours |
| Late Mar – Oct current | Both on summer / daylight time | HST (UTC−10) | GMT+10 (UTC+10) | 20 hours |
| Late Oct – early Nov | Clocks transitioning — check exact date | HST (UTC−10) | GMT+11 (UTC+11) | 21 hours |
The transition window typically lasts 1–2 weeks in spring and autumn. If you have a recurring weekly meeting near a clock change, verify the exact date to avoid a missed call.
Honolulu is currently 20 hours behind Sydney. Honolulu uses Hawaii-Aleutian Standard Time (UTC−10) and Sydney uses Australian Eastern Standard Time (UTC+10).
Honolulu and Sydney have no standard 9 am–6 pm business-hour overlap. Consider scheduling during early morning or late evening, or use a rotating schedule to share the inconvenience.
When it is 9:00 AM in Honolulu, it is 5:00 am in Sydney (previous day). Honolulu is 20 hours behind Sydney.
When it is 5:00 PM in Sydney, it is 9:00 pm in Honolulu (next day).
Sydney observes Daylight Saving Time but Honolulu does not. This means the offset between the two cities changes by one hour when Sydney transitions its clocks. Always verify the current offset when scheduling meetings near DST transition dates.