What is HST in AEST?

Australian Eastern Time is 21 hours ahead

Hawaii Standard Time is on UTC−10:00 and Australian Eastern Time is on UTC+11:00 right now. Australian Eastern Time is on daylight saving, so its clocks read AEDT. The gap changes during the year — see below.

Convert a time

HST — Hawaii Standard Time

AEDT — Australian Eastern Time

7:00 pm

AEDT, Sat, the next day

Time in Honolulu: 10:30:10 PM
Time in Sydney: 7:30:10 PM
Difference: +21 h
Next clock change: April 4, 2027

When the difference changes

Hawaii Standard Time and Australian Eastern Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:

Now – April 3, 2027Australian Eastern Time is 21 hours ahead
April 3, 2027 – October 2, 2027Australian Eastern Time is 20 hours ahead
October 2, 2027 – onwardsAustralian Eastern Time is 21 hours ahead

Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.

Daylight saving

Hawaii Standard Time

No clock changes

Hawaii Standard Time stays on HST all year, so its offset from UTC never moves.

Australian Eastern Time

Sunday, April 4, 2027

Clocks go back one hour — 3:00 am becomes 2:00 am local time, and the zone is on AEST after that.

HST to AEST conversion table

Every hour of Friday, November 6, 2026, converted from Hawaii Standard Time to Australian Eastern Time. 21 of the 24 hours fall on a different calendar day in Sydney, which is marked.

12:00 am HST: 9:00 pm AEDT
1:00 am HST: 10:00 pm AEDT
2:00 am HST: 11:00 pm AEDT
3:00 am HST: 12:00 am AEDT+1 day
4:00 am HST: 1:00 am AEDT+1 day
5:00 am HST: 2:00 am AEDT+1 day
6:00 am HST: 3:00 am AEDT+1 day
7:00 am HST: 4:00 am AEDT+1 day
8:00 am HST: 5:00 am AEDT+1 day
9:00 am HST: 6:00 am AEDT+1 day
10:00 am HST: 7:00 am AEDT+1 day
11:00 am HST: 8:00 am AEDT+1 day

12:00 pm HST: 9:00 am AEDT+1 day
1:00 pm HST: 10:00 am AEDT+1 day
2:00 pm HST: 11:00 am AEDT+1 day
3:00 pm HST: 12:00 pm AEDT+1 day
4:00 pm HST: 1:00 pm AEDT+1 day
5:00 pm HST: 2:00 pm AEDT+1 day
6:00 pm HST: 3:00 pm AEDT+1 day
7:00 pm HST: 4:00 pm AEDT+1 day
8:00 pm HST: 5:00 pm AEDT+1 day
9:00 pm HST: 6:00 pm AEDT+1 day
10:00 pm HST: 7:00 pm AEDT+1 day
11:00 pm HST: 8:00 pm AEDT+1 day

Scheduling between the two

Working hours overlap from 12:00 pm to 6:00 pm HST, which is 9:00 am to 3:00 pm AEDT. Anything inside that window falls in the normal working day at both ends.

Hawaii Standard Time (HST) is used in all of Hawaii, which does not observe daylight saving

Australian Eastern Time (AEDT) is used in Melbourne, Canberra and Brisbane. Queensland stays on AEST all year while the southern states move to AEDT.