Australian Central Time to Hawaii Time
Convert times between Australian Central Time (ACST, UTC+9:30) and Hawaii Time (HST, UTC-10:00). Hawaii Time is 19.5 hours behind Australian Central Time in standard time. During daylight saving time this difference changes to 20.5 hours.
UTC+9:30 / +10:30→UTC-10:00
Live timezone converterUTC Offset Reference
| Timezone | Abbreviation | Standard offset | DST offset | Country |
|---|---|---|---|---|
| Australian Central Time | ACST / ACDT | UTC+9:30 | UTC+10:30 | Australia |
| Hawaii Time | HST | UTC-10:00 | — | United States |
* DST offset applies during summer months. Exact transition dates vary by year.
Standard Time Conversion (ACST → HST)
| Australian Central Time | Hawaii Time |
|---|---|
| 12:00 AM ACST | 4.5:00 AM (prev day) HST |
| 6:00 AM ACST | 10.5:00 AM (prev day) HST |
| 9:00 AM ACST | 1.5:00 PM (prev day) HST |
| 12:00 PM ACST | 4.5:00 PM (prev day) HST |
| 3:00 PM ACST | 7.5:00 PM (prev day) HST |
| 6:00 PM ACST | 10.5:00 PM (prev day) HST |
| 9:00 PM ACST | 1.5:00 AM HST |
Summer (DST) Conversion (ACDT → HST)
| Australian Central Time (summer) | Hawaii Time (summer) |
|---|---|
| 12:00 AM ACDT | 3.5:00 AM (prev day) HST |
| 6:00 AM ACDT | 9.5:00 AM (prev day) HST |
| 9:00 AM ACDT | 0.5:00 PM (prev day) HST |
| 12:00 PM ACDT | 3.5:00 PM (prev day) HST |
| 3:00 PM ACDT | 6.5:00 PM (prev day) HST |
| 6:00 PM ACDT | 9.5:00 PM (prev day) HST |
| 9:00 PM ACDT | 0.5:00 AM HST |
Daylight Saving Time (DST) Notes
- Australian Central Time observes DST. Clocks advance 1 hour to ACDT (UTC+10:30) roughly from month 10 to 4.
- The offset difference shifts between 19.5h (standard) and 20.5h (DST season). Always verify the current offset using the live converter below.
Frequently Asked Questions
How do I convert ACST to HST?
Add (-19.5) hours to the ACST time to get HST. For example, 9:00 AM ACST = 1.5:00 PM HST.
What is the current UTC offset for Australian Central Time?
Australian Central Time is UTC+9:30 during standard time (ACST) and UTC+10:30 during summer daylight saving time (ACDT).
Is Hawaii Time ahead or behind Australian Central Time?
Hawaii Time is 19.5 hours behind Australian Central Time in standard time.
When is a good time to schedule a meeting between ACST and HST?
Due to the 19.5-hour difference, business-hours overlap may be limited. Use the live timezone converter to find a mutually convenient time.
Related Timezone Conversions
Australian Central Time → US Eastern TimeACST / ESTAustralian Central Time → US Central TimeACST / CSTAustralian Central Time → US Mountain TimeACST / MSTAustralian Central Time → US Pacific TimeACST / PSTAustralian Central Time → US Alaska TimeACST / AKSTAustralian Central Time → Canada Atlantic TimeACST / ASTAustralian Central Time → Australian Eastern TimeACST / AESTAustralian Central Time → Australian Western TimeACST / AWST
Need the exact current time?
Use the live ToolsHub timezone converter to see current times, DST status, and schedule across time zones.