HST to Melbourne
+20hHST
HSTSOURCEMelbourne
AESTGreen rows indicate typical business hours (9 AM - 5 PM)
HST and AEST on the World Map
The map below highlights the HST (Hawaii Standard Time) and AEST (Australian Eastern 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).
AEST – Australian Eastern Standard Time
UTC+10:00Australian Eastern Standard Time (AEST) covers eastern Australia, 10 hours ahead of UTC.
- •Queensland does not observe daylight saving time, staying on AEST year-round.
- •Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
- •The Australian Securities Exchange (ASX) operates on AEST/AEDT.
- •AEST is 15 hours ahead of EST during winter.
About Melbourne
WikipediaMelbourne operates on Australian Eastern Time (AEST/AEDT). As Australia's second-largest city, Melbourne shares business hours with Sydney and the ASX.
Melbourne was the capital of Australia from 1901 to 1927.
Understanding the +20h Gap: HST vs Melbourne
HST runs on Hawaii Standard Time (HST) at UTC-10:00. Melbourne runs on Australian Eastern Standard Time (AEST) at UTC+10:00. That puts HST 20 hours ahead of Melbourne — a difference of +20h at the current offsets.
In practice, when it is 9:00 AM in HST it is 5:00 AM in Melbourne on the next day. Midnight in HST is 8:00 PM in Melbourne. Neither zone observes daylight saving time, so the offset between them stays constant all year.
HST to Melbourne time conversion table
| HST (HST) | Melbourne (AEST) | Day |
|---|---|---|
| 12:00 AM | 8:00 PM | same day |
| 6:00 AM | 2:00 AM | next day |
| 7:00 AM | 3:00 AM | next day |
| 8:00 AM | 4:00 AM | next day |
| 9:00 AM | 5:00 AM | next day |
| 12:00 PM | 8:00 AM | next day |
| 3:00 PM | 11:00 AM | next day |
| 5:00 PM | 1:00 PM | next day |
| 6:00 PM | 2:00 PM | next day |
| 9:00 PM | 5:00 PM | next day |
Why people convert HST to Melbourne time
- Scheduling a call from HST to Melbourne: a 10:00 AM start in HST lands at 6:00 AM in Melbourne the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +20h gap: HST and Melbourne 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 Melbourne is 5:00 AM in HST.
- Coordinating a HST-based team with Melbourne contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM HST" is unambiguous; "3 PM" across a +20h gap is not.
- With a +20h gap there is no shared 9-to-5 window, so alternate the early start: one week HST takes the early slot, the next week Melbourne does.
- Melbourne: Clocks spring forward on Sat, Oct 3, 2026. Any meeting series spanning that date will shift by an hour in local time.
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 AEST (Australian Eastern Standard Time)
Australian Eastern Standard Time (AEST) is used in the eastern states of Australia including New South Wales, Victoria, Queensland, Tasmania, and the ACT. During summer (October to April), NSW, VIC, TAS, and ACT switch to Australian Eastern Daylight Time (AEDT, UTC+11:00), while Queensland remains on AEST year-round.
Best time to call between HST and Melbourne
With a +20h offset there is no overlap inside a normal 9 AM – 5 PM day. Melbourne opens at 9:00 AM AEST, which is 5:00 AM in HST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
HST and Melbourne have no shared working hours because of the +20h gap. Teams need to alternate early starts or rely on asynchronous handovers.
HST is 20 hours ahead of Melbourne (HST UTC-10:00 → AEST 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
HST
Does not observe DST
Melbourne
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
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 HST and Melbourne?
HST (HST, UTC-10:00) is 20 hours ahead of Melbourne (AEST, UTC+10:00). The gap is currently +20h.
How do I convert HST time to Melbourne time?
Add +20h to HST local time. For example, 9:00 AM in HST is 5:00 AM in Melbourne (next day).
What time is it in Melbourne right now?
Melbourne uses AEST at UTC+10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +20h offset from HST.
What is the best time to call Melbourne from HST?
There is no shared working-hours window because of the +20h gap. The closest option is 1:00 PM in HST, which is 9:00 AM in Melbourne.
Which is ahead, HST or Melbourne?
HST is 20 hours ahead of Melbourne. When it is 12:00 PM in HST it is 8:00 AM in Melbourne.
Do HST and Melbourne use different time zones?
HST uses HST at UTC-10:00, while Melbourne (Australia) uses AEST at UTC+10:00. The IANA identifiers are Pacific/Honolulu and Australia/Melbourne.
Does daylight saving time affect the HST–Melbourne difference?
Neither zone observes daylight saving time, so the +20h offset between HST and Melbourne is fixed all year.
Which other cities share HST's time zone?
HST also covers Honolulu, Hilo, Kailua, Pearl City, Kapolei.
Which countries use HST, HST's zone?
HST is used in United States (Hawaii).
Is there a day difference between HST and Melbourne?
Sometimes. The +20h gap is large enough that 8:00 PM or later in HST already falls on the next day in Melbourne.
What is the time difference between HST and Melbourne?
Melbourne is +20h from HST.
What timezone is HST in?
HST operates on its local timezone.
What timezone is Melbourne in?
Melbourne operates on Australian Eastern Time (AEST/AEDT). As Australia's second-largest city, Melbourne shares business hours with Sydney and the ASX.
What are the business hours in Melbourne?
Standard business hours in Melbourne are 9:00 AM - 5:00 PM AEST.
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 AEST timezone?
Major cities in the AEST timezone include Sydney, Melbourne, Brisbane, Canberra, Hobart, Gold Coast.
What is the UTC offset for AEST?
Australian Eastern Standard Time (AEST) is at UTC+10:00. During daylight saving time, it shifts to AEDT.
What should I know about the AEST timezone?
Queensland does not observe daylight saving time, staying on AEST year-round. Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
When is it midnight in HST, what time is it in Melbourne?
When it is 12:00 AM (midnight) in HST (HST), it is +20h later in Melbourne (AEST).
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