AEDT to Honolulu
-21hAEDT
AEDTSOURCEHonolulu
HSTGreen rows indicate typical business hours (9 AM - 5 PM)
AEDT and HST on the World Map
The map below highlights the AEDT (Australian Eastern Daylight Time) and HST (Hawaii Standard Time) timezone regions across the globe.
AEDT – Australian Eastern Daylight Time
UTC+11:00Australian Eastern Daylight Time (AEDT, UTC+11:00) is the daylight saving period in south-eastern Australia, from October to April.
- •AEDT runs from the first Sunday in October to the first Sunday in April.
- •AEDT is one hour ahead of Australian Eastern Standard Time (AEST).
- •Queensland does not observe daylight saving, so Brisbane stays on AEST.
- •During AEDT, Sydney is 16 hours ahead of New York and 11 hours ahead of UTC.
HST – Hawaii Standard Time
UTC-10:00Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.
- •Hawaii does not observe daylight saving time.
- •HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
- •Hawaii is one of only two US states that don't observe DST (the other is Arizona).
About Honolulu
WikipediaHonolulu operates on Hawaii Standard Time (HST), UTC-10 with no daylight saving. Hawaii's consistent time makes it a predictable connection between Asia and mainland USA.
Pearl Harbor memorial receives over 2 million visitors annually.
Understanding the -21h Gap: AEDT vs Honolulu
AEDT runs on Australian Eastern Daylight Time (AEDT) at UTC+11:00. Honolulu runs on Hawaii-Aleutian Standard Time (HST) at UTC-10:00. That puts AEDT 21 hours behind Honolulu — a difference of -21h at the current offsets.
In practice, when it is 9:00 AM in AEDT it is 12:00 PM in Honolulu on the previous day. Midnight in AEDT is 3:00 AM in Honolulu. Neither zone observes daylight saving time, so the offset between them stays constant all year.
AEDT to Honolulu time conversion table
| AEDT (AEDT) | Honolulu (HST) | Day |
|---|---|---|
| 12:00 AM | 3:00 AM | previous day |
| 6:00 AM | 9:00 AM | previous day |
| 7:00 AM | 10:00 AM | previous day |
| 8:00 AM | 11:00 AM | previous day |
| 9:00 AM | 12:00 PM | previous day |
| 12:00 PM | 3:00 PM | previous day |
| 3:00 PM | 6:00 PM | previous day |
| 5:00 PM | 8:00 PM | previous day |
| 6:00 PM | 9:00 PM | previous day |
| 9:00 PM | 12:00 AM | same day |
Why people convert AEDT to Honolulu time
- Scheduling a call from AEDT to Honolulu: a 10:00 AM start in AEDT lands at 1:00 PM in Honolulu the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -21h gap: AEDT and Honolulu have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Honolulu is 12:00 PM in AEDT.
- Booking travel or deliveries: tracking Honolulu local time against AEDT keeps pickup windows and arrival estimates honest across the -21h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM AEDT" is unambiguous; "3 PM" across a -21h gap is not.
- With a -21h gap there is no shared 9-to-5 window, so alternate the early start: one week AEDT takes the early slot, the next week Honolulu does.
About AEDT (Australian Eastern Daylight Time)
Australian Eastern Daylight Time (AEDT) is the daylight saving period in south-eastern Australia, one hour ahead of Australian Eastern Standard Time (AEST, UTC+10:00). Because Australia is in the southern hemisphere, AEDT runs through the summer — from the first Sunday in October to the first Sunday in April — which is almost exactly the reverse of the European and North American schedules. New South Wales, Victoria, Tasmania and the Australian Capital Territory observe it; Queensland and the Northern Territory do not, so Brisbane stays on AEST year round while Sydney moves to AEDT. During AEDT, Sydney is 11 hours ahead of UTC and 16 hours ahead of New York.
About HST (Hawaii Standard Time)
Hawaii Standard Time (HST) is used in the state of Hawaii and does not observe daylight saving time. This makes HST one of the most consistent time zones in the US. The Hawaiian Islands are among the last places on Earth to see a new calendar day.
Best time to call between AEDT and Honolulu
With a -21h offset there is no overlap inside a normal 9 AM – 5 PM day. Honolulu opens at 9:00 AM HST, which is 12:00 PM in AEDT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
AEDT and Honolulu have no shared working hours because of the -21h gap. Teams need to alternate early starts or rely on asynchronous handovers.
AEDT is 21 hours behind Honolulu (AEDT UTC+11:00 → HST UTC-10:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
AEDT
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
Honolulu
Does not observe DST
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between AEDT and Honolulu?
AEDT (AEDT, UTC+11:00) is 21 hours behind Honolulu (HST, UTC-10:00). The gap is currently -21h.
How do I convert AEDT time to Honolulu time?
Add -21h to AEDT local time. For example, 9:00 AM in AEDT is 12:00 PM in Honolulu (previous day).
What time is it in Honolulu right now?
Honolulu uses HST at UTC-10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -21h offset from AEDT.
What is the best time to call Honolulu from AEDT?
There is no shared working-hours window because of the -21h gap. The closest option is 1:00 PM in AEDT, which is 4:00 PM in Honolulu.
Which is behind, AEDT or Honolulu?
AEDT is 21 hours behind Honolulu. When it is 12:00 PM in AEDT it is 3:00 PM in Honolulu.
Do AEDT and Honolulu use different time zones?
AEDT uses AEDT at UTC+11:00, while Honolulu (USA) uses HST at UTC-10:00. The IANA identifiers are Australia/Sydney and Pacific/Honolulu.
Does daylight saving time affect the AEDT–Honolulu difference?
Neither zone observes daylight saving time, so the -21h offset between AEDT and Honolulu is fixed all year.
Which other cities share AEDT's time zone?
AEDT also covers Sydney, Melbourne, Canberra, Hobart, Newcastle.
Which countries use AEDT, AEDT's zone?
AEDT is used in Australia (NSW, Victoria, Tasmania, ACT).
Is there a day difference between AEDT and Honolulu?
Sometimes. The -21h gap is large enough that 8:00 PM or later in AEDT already falls on the previous day in Honolulu.
What is the time difference between AEDT and Honolulu?
Honolulu is -21h from AEDT.
What timezone is AEDT in?
AEDT operates on its local timezone.
What timezone is Honolulu in?
Honolulu operates on Hawaii Standard Time (HST), UTC-10 with no daylight saving. Hawaii's consistent time makes it a predictable connection between Asia and mainland USA.
What are the business hours in Honolulu?
Standard business hours in Honolulu are 8:00 AM - 5:00 PM HST.
Which countries use AEDT (Australian Eastern Daylight Time)?
AEDT is used in Australia (NSW, Victoria, Tasmania, ACT).
Does AEDT observe daylight saving time?
Yes, AEDT switches to AEDT during summer months.
What are some interesting facts about AEDT?
AEDT runs from the first Sunday in October to the first Sunday in April. AEDT is one hour ahead of Australian Eastern Standard Time (AEST).
Which cities are in the HST timezone?
Major cities in the HST timezone include Honolulu, Hilo, Kailua, Pearl City, Kapolei.
What is the UTC offset for HST?
Hawaii Standard Time (HST) is at UTC-10:00.
What should I know about the HST timezone?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
When is it midnight in AEDT, what time is it in Honolulu?
When it is 12:00 AM (midnight) in AEDT (AEDT), it is -21h later in Honolulu (HST).
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