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HST to AEDT Time Converter

Use this HST to AEDT time converter to compare United States and Australia time instantly. AEDT is 21 hours ahead of HST, so 9:00 AM HST becomes 6:00 AM (next day) AEDT and 5:00 PM HST becomes 2:00 PM (next day) AEDT. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.

HST Hawaii Standard Time
...
AEDT Australian Eastern Daylight Time
...
Select a time to convert

HST to AEDT Quick Facts

Use this HST to AEDT converter to compare United States and Australia time, check the 21 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Find the best overlap for calls and meetings.

Time Difference
Australian Eastern Daylight Time is 21 hours ahead of Hawaii Standard Time
Useful when deadlines, handoffs, or calls cross workday boundaries.
Best Call Window
Normal business hours do not overlap well here, so test early-morning or late-evening compromise slots.
Common Use Cases
Useful for remote teams, customer support windows, travel planning, webinars, and same-day deadline handoffs.

How to Convert HST to AEDT

Converting between Hawaii Standard Time and Australian Eastern Daylight Time means accounting for a 21 hours gap — here's how to do it in under 10 seconds with no sign-up.

Enter Your HST Time

Pick the date and time in Hawaii Standard Time (UTC -10) that you want to convert. Hit "Now" to load the current HST time instantly, or use "+1h" to step forward and compare.

Read the AEDT Result

The equivalent Australian Eastern Daylight Time (UTC +11) time appears immediately. Since AEDT is 21 hours ahead of HST, conversions often cross midnight — look for the date-change label.

Copy or Fine-Tune

Click "Copy Time" to grab the AEDT result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — helpful for scheduling recurring United States–Australia calls.

Why Choose Our HST to AEDT Converter

Align HST–AEDT Meetings Instantly

With 21 hours between HST and AEDT, business-hours overlap is limited. This tool instantly shows which hours work on both sides, so you can lock in a meeting without a chain of "does 3 PM work for you?" emails.

Spot Date-Line Shifts at a Glance

A HST evening at 9 PM is already the next morning in AEDT. This converter flags date changes beside the result — critical when booking flights, hitting deadlines, or scheduling across the United States–Australia corridor.

Handles DST Transitions Automatically

Daylight Saving adjustments can widen or narrow the HST–AEDT gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.

Never Miss a HST-Timed Event

Product launches, sports matches, and webinars are often announced in HST. Convert the event time to AEDT so you know exactly when to tune in — with a 21 hours difference, a morning event in United States falls during work hours in Australia.

HST to AEDT Time Conversion Chart

Quick-reference conversion table covering every hour of the day at a glance.

Complete 24-Hour Conversion

Hawaii Standard Time to Australian Eastern Daylight Time full day schedule

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
(next day)
4:00 AM
HST
→
1:00 AM
AEDT
(next day)
5:00 AM
HST
→
2:00 AM
AEDT
(next day)
6:00 AM
HST
→
3:00 AM
AEDT
(next day)
7:00 AM
HST
→
4:00 AM
AEDT
(next day)
8:00 AM
HST
→
5:00 AM
AEDT
(next day)
9:00 AM
HST
→
6:00 AM
AEDT
(next day)
10:00 AM
HST
→
7:00 AM
AEDT
(next day)
11:00 AM
HST
→
8:00 AM
AEDT
(next day)
12:00 PM
HST
→
9:00 AM
AEDT
(next day)
1:00 PM
HST
→
10:00 AM
AEDT
(next day)
2:00 PM
HST
→
11:00 AM
AEDT
(next day)
3:00 PM
HST
→
12:00 PM
AEDT
(next day)
4:00 PM
HST
→
1:00 PM
AEDT
(next day)
5:00 PM
HST
→
2:00 PM
AEDT
(next day)
6:00 PM
HST
→
3:00 PM
AEDT
(next day)
7:00 PM
HST
→
4:00 PM
AEDT
(next day)
8:00 PM
HST
→
5:00 PM
AEDT
(next day)
9:00 PM
HST
→
6:00 PM
AEDT
(next day)
10:00 PM
HST
→
7:00 PM
AEDT
(next day)
11:00 PM
HST
→
8:00 PM
AEDT
(next day)
The two zones in context

HST vs AEDT — cities and working rhythm

AEDT — Australian Eastern Daylight Time
Primary cities: Sydney, Melbourne, Brisbane (AEST, no DST), Canberra, Hobart

Australia's east coast — Sydney (financial), Melbourne (corporate HQ / media), Brisbane (mining / education). Business hours 9 AM – 5 PM AET. Summer: AEDT (UTC+11); winter: AEST (UTC+10). Brisbane stays on AEST year-round — so Sydney and Brisbane are 1 h apart in summer, same in winter. Almost entirely opposite of European hours.

Popular HST Time Converters

Explore more HST conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.

Convert Other Time Zones to AEDT

Find the time difference from any major zone into Australian Eastern Daylight Time. Use these pages when scheduling with Australia from a different region.

🇦🇺 Swap direction — AEDT to HST Converter