ACST to HST Converter
Australian Central Time
4:12:32 PM ACST
Thursday, May 14, 2026
19h 30m
19h 30m
Hawaii Time
8:42:32 PM HST
Wednesday, May 13, 2026
Hawaii Time (HST) is 19.5 hours behind Australian Central Time (ACST / ACDT).
Quick Reference
- Australian Central Time
- ACST (GMT+9:30)
ACDT starts on Oct 3, 2026
- Hawaii Time
- HST (GMT-10)
No Daylight Saving Time
Cities in ACST
Cities in HST
Frequently Asked Questions
- What is the difference between ACST and HST?
- HST is 19.5 hours behind ACST.
- How do I convert ACST to HST?
- To convert from ACST to HST, subtract 19.5 hours. Use the interactive converter on this page to convert specific times.
- What cities are in ACST and HST?
- Cities in ACST include Adelaide, Mount Gambier. Cities in HST include Honolulu, Hilo, Kahului, Kaneohe, Kapolei.