HST to Sydney time
HSTHawaii Time7:19:20 AMSun 27 Sept · HST UTC−10
20 hSydney is ahead
SydneyAustralia3:19:20 AMMon 28 Sept · AEST UTC+10Synchronising…
HST and Sydney time difference
Sydney is currently 20 h ahead of HST. HST is on HST (UTC−10:00) and Sydney is on AEST (UTC+10:00).
The difference can change with daylight saving time. The next change is in Sydney on Sunday, 4 October 2026, after which Sydney will be 21 h ahead of HST.
If it is 9:00 in HST, what time is it in Sydney?
It is 05:00 in Sydney (next day).
What is the best time for a call between HST and Sydney?
Use the planner above: green hours are within 9:00–17:00 in both places.