Time Difference: Honolulu vs Sydney
Honolulu
11:00:47 PM HST
Saturday, October 24, 2026
21h
21h
Sydney
8:00:47 PM AEDT
Sunday, October 25, 2026
Sydney is 21 hours ahead of Honolulu.
Quick Reference
- Honolulu
- HST (GMT-10)
No Daylight Saving Time
- Sydney
- AEDT (GMT+11)
AEST starts on Apr 3, 2027
Frequently Asked Questions
- What is the time difference between Honolulu and Sydney?
- Sydney is 21 hours ahead of Honolulu.
- When is the best time to call from Honolulu to Sydney?
- The best time to call is during overlapping business hours (9 AM – 5 PM) in both cities. Use the interactive converter on this page to visually compare hours side by side.
- Does the time difference change with daylight saving time?
- The time difference may change when either city enters or exits daylight saving time. Honolulu uses HST and Sydney uses AEDT.