Honolulu to Perth
+18hHonolulu
HSTSOURCEPerth
AWSTGreen rows indicate typical business hours (9 AM - 5 PM)
HST and AWST on the World Map
The map below highlights the HST (Hawaii Standard Time) and AWST (Australian Western Standard Time) timezone regions across the globe.
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).
AWST – Australian Western Standard Time
UTC+08:00Australian Western Standard Time (AWST) is the time zone for Western Australia, 8 hours ahead of UTC.
- •Western Australia does not observe daylight saving time.
- •Perth is the most isolated major city in the world.
- •AWST is the same offset as China Standard Time and Singapore Time.
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.
About Perth
WikipediaPerth operates on Australian Western Time (AWST), UTC+8 with no daylight saving. As Australia's mining capital, Perth coordinates with Asian markets.
Western Australia does not observe daylight saving time.
Comparing Time Zones: Honolulu and Perth
Honolulu runs on Hawaii-Aleutian Standard Time (HST) at UTC-10:00. Perth runs on Australian Western Standard Time (AWST) at UTC+08:00. That puts Honolulu 18 hours ahead of Perth — a difference of +18h at the current offsets.
In practice, when it is 9:00 AM in Honolulu it is 3:00 AM in Perth on the next day. Midnight in Honolulu is 6:00 PM in Perth. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Honolulu to Perth time conversion table
| Honolulu (HST) | Perth (AWST) | Day |
|---|---|---|
| 12:00 AM | 6:00 PM | same day |
| 6:00 AM | 12:00 AM | next day |
| 7:00 AM | 1:00 AM | next day |
| 8:00 AM | 2:00 AM | next day |
| 9:00 AM | 3:00 AM | next day |
| 12:00 PM | 6:00 AM | next day |
| 3:00 PM | 9:00 AM | next day |
| 5:00 PM | 11:00 AM | next day |
| 6:00 PM | 12:00 PM | next day |
| 9:00 PM | 3:00 PM | next day |
Why people convert Honolulu to Perth time
- Scheduling a call from Honolulu to Perth: a 10:00 AM start in Honolulu lands at 4:00 AM in Perth the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +18h gap: Honolulu and Perth 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 Perth is 3:00 AM in Honolulu.
- Keeping family and friends in sync: knowing that 8:00 PM in Honolulu is 2:00 PM in Perth makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM HST" is unambiguous; "3 PM" across a +18h gap is not.
- With a +18h gap there is no shared 9-to-5 window, so alternate the early start: one week Honolulu takes the early slot, the next week Perth does.
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.
About AWST (Australian Western Standard Time)
Australian Western Standard Time (AWST) is used in Western Australia. WA does not observe daylight saving time, having rejected it in multiple referendums. Perth is the most remote major city in the world.
Best time to call between Honolulu and Perth
With a +18h offset there is no overlap inside a normal 9 AM – 5 PM day. Perth opens at 9:00 AM AWST, which is 3:00 AM in Honolulu, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Honolulu and Perth have no shared working hours because of the +18h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Honolulu is 18 hours ahead of Perth (HST UTC-10:00 → AWST UTC+08:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
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 Honolulu and Perth?
Honolulu (HST, UTC-10:00) is 18 hours ahead of Perth (AWST, UTC+08:00). The gap is currently +18h.
How do I convert Honolulu time to Perth time?
Add +18h to Honolulu local time. For example, 9:00 AM in Honolulu is 3:00 AM in Perth (next day).
What time is it in Perth right now?
Perth uses AWST at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +18h offset from Honolulu.
What is the best time to call Perth from Honolulu?
There is no shared working-hours window because of the +18h gap. The closest option is 1:00 PM in Honolulu, which is 7:00 AM in Perth.
Which is ahead, Honolulu or Perth?
Honolulu is 18 hours ahead of Perth. When it is 12:00 PM in Honolulu it is 6:00 AM in Perth.
Do Honolulu and Perth use different time zones?
Honolulu (USA) uses HST at UTC-10:00, while Perth (Australia) uses AWST at UTC+08:00. The IANA identifiers are Pacific/Honolulu and Australia/Perth.
Does daylight saving time affect the Honolulu–Perth difference?
Neither zone observes daylight saving time, so the +18h offset between Honolulu and Perth is fixed all year.
Which other cities share Honolulu's time zone?
HST also covers Honolulu, Hilo, Kailua, Pearl City, Kapolei.
Which countries use HST, Honolulu's zone?
HST is used in United States (Hawaii).
Is there a day difference between Honolulu and Perth?
Sometimes. The +18h gap is large enough that 8:00 PM or later in Honolulu already falls on the next day in Perth.
What is the time difference between Honolulu and Perth?
Perth is +18h from Honolulu.
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 timezone is Perth in?
Perth operates on Australian Western Time (AWST), UTC+8 with no daylight saving. As Australia's mining capital, Perth coordinates with Asian markets.
What are the business hours in Honolulu?
Standard business hours in Honolulu are 8:00 AM - 5:00 PM HST.
What are the business hours in Perth?
Standard business hours in Perth are 9:00 AM - 5:00 PM AWST.
What is the best time to schedule a call between Honolulu and Perth?
The best overlap for a call is when both cities are in business hours. Honolulu works 8:00 AM - 5:00 PM HST and Perth works 9:00 AM - 5:00 PM AWST (+18h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Honolulu and Perth?
Honolulu uses USD ($) while Perth uses AUD (A$). Check current exchange rates when planning travel or business between these cities.
How do Honolulu and Perth compare in size?
Honolulu has a population of approximately 350,000 (metro: 1 million), while Perth has approximately 2.1 million (metro: 2.2 million).
What are the major landmarks in Honolulu and Perth?
Honolulu is known for Waikiki Beach, Diamond Head, Pearl Harbor. Perth is famous for Kings Park, Perth Mint, Elizabeth Quay.
Do Honolulu and Perth have stock exchanges?
Yes. Honolulu has the N/A (Uses NYSE/NASDAQ) and Perth has the ASX (via Sydney). The +18h time difference affects trading hour overlaps between these exchanges.
Which countries use HST (Hawaii Standard Time)?
HST is used in United States (Hawaii).
Does HST observe daylight saving time?
No, HST does not observe daylight saving time and remains at UTC-10:00 year-round.
What are some interesting facts about HST?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
Which cities are in the AWST timezone?
Major cities in the AWST timezone include Perth, Mandurah, Bunbury, Geraldton.
What is the UTC offset for AWST?
Australian Western Standard Time (AWST) is at UTC+08:00.
What should I know about the AWST timezone?
Western Australia does not observe daylight saving time. Perth is the most isolated major city in the world.
When is it midnight in Honolulu, what time is it in Perth?
When it is 12:00 AM (midnight) in Honolulu (HST), it is +18h later in Perth (AWST).
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