Time Difference Between Honolulu and Sydney

The time difference between Honolulu and Sydney is 21 hours. When it is 12:00 noon in Honolulu, it is 09:00 in Sydney. Honolulu uses the Pacific/Honolulu time zone (UTC-10), while Sydney uses Australia/Sydney (UTC+11).

Time Zone Details: Honolulu vs Sydney

Best Time to Schedule a Call

With a 21 hours gap, there is no standard business-hours overlap between Honolulu and Sydney. One party will need to adjust their schedule. Early mornings in Sydney or late evenings in Honolulu tend to be the most practical compromise.

Hour-by-Hour Time Conversion

Use this table to quickly convert any hour from Honolulu time to Sydney time. Rows highlighted in green indicate overlapping business hours in both cities.

Daylight Saving Time (DST) Impact

Sydney is currently observing daylight saving time, while Honolulu is on standard time. When Sydney switches back to standard time, the difference between these two cities will shift by 1 hour.

Practical Tips for Honolulu–Sydney Scheduling

• Video calls: Rotate call times between early-morning and late-evening slots to share the scheduling burden fairly.
• Email and async work: Send messages at the end of your workday so they arrive at the start of theirs. With a 21 hours offset, replies will often land by your next morning.
• Flight arrivals: A direct flight between these cities can cross 21 time zones. Factor in jet lag recovery — most travelers need roughly one day per hour of time difference to fully adjust.
• Use UTC as a neutral reference when coordinating with three or more time zones at once.

Compare Honolulu and Sydney with Other Cities

From Honolulu

From Sydney

Frequently Asked Questions

What is the time difference between Honolulu and Sydney?

The time difference is 21 hours. Sydney is 21 hours ahead of Honolulu.

Does the time difference change during the year?

Yes. One of these cities observes DST while the other does not, so the difference shifts by 1 hour when DST begins or ends.

When is the best time to call from Honolulu to Sydney?

There is no ideal window during standard business hours. Consider scheduling at the edges — early morning for the city that is ahead and late afternoon for the city that is behind.

How do I convert Honolulu time to Sydney time?

Add 21 hours to Honolulu time to get Sydney time. Use the hour-by-hour table above for a quick reference.

Related Pages

• Current time in Honolulu — live clock, time zone details, DST status
• Current time in Sydney — live clock, time zone details, DST status
• Time Difference Calculator — compare any two cities
• UTC-10 countries and cities
• UTC+11 countries and cities
• Current UTC Time
• All World Time Zones
• What Is a Time Zone?

For sunrise and sunset data, visit TheSunsetTimes.com. For detailed DST schedules, see DaylightSavingTime.info.