What is the time difference between AWST and HST?

Hawaii Standard Time (HST) is 18 hours behind Australian Western Standard Time (AWST). AWST uses a UTC offset of UTC+8, while HST uses UTC-10. For example, when it's 9:00 AM in AWST, it's 3:00 PM in HST. This difference remains constant year-round since neither timezone observes daylight saving time. Use the conversion table above to see the exact time for each hour of the day.

How do I convert AWST to HST?

To convert AWST to HST, subtract 18 hours from the AWST time. For example, 9:00 AM AWST is 3:00 PM HST, and 5:00 PM AWST is 11:00 PM HST. Since neither timezone observes DST, this conversion stays the same all year. You can also use the interactive converter above for quick, accurate results.

What time is it in HST when it's noon in AWST?

When it's 12:00 PM (noon) in AWST, it's 6:00 PM in HST. This is because HST is 18 hours behind AWST. Similarly, when it's 6:00 PM in AWST, it's 12:00 AM in HST. This relationship is constant throughout the year. The color-coded conversion table above shows every hour mapped between both timezones.

How many hours behind is HST from AWST?

HST is 18 hours behind AWST. This means when it's 9:00 AM in AWST, it's 3:00 PM in HST, and when it's midnight in AWST, it's 6:00 AM in HST. This offset is constant throughout the year since neither timezone uses daylight saving time. The conversion table above provides a complete hour-by-hour mapping.

Is HST ahead or behind AWST?

HST is behind AWST by 18 hours. Clocks in HST show an earlier time than AWST, meaning the day starts later in HST relative to AWST. For example, when it's noon in AWST, it's still 6:00 PM in HST. This difference stays the same year-round.

Does AWST observe daylight saving time?

No, Australian Western Standard Time does not observe daylight saving time. The UTC offset of UTC+8 remains the same year-round, making time conversions from AWST more predictable. Countries and regions in this timezone keep their clocks unchanged regardless of the season.

Does HST observe daylight saving time?

No, Hawaii Standard Time does not observe daylight saving time. The UTC offset of UTC-10 remains the same year-round, making time conversions to HST more predictable. Countries and regions in this timezone keep their clocks unchanged regardless of the season.

What is the best time to call from AWST to HST?

The best time for a call between AWST and HST is during overlapping business hours (9 AM – 5 PM) in both timezones. To reach someone in HST during their work day, call between 3:00 AM and 11:00 AM your AWST time. Avoid calling too early or late, as the 18 hours difference means your evening could be their early morning. Check the color-coded conversion table above — green hours indicate business hours in both zones, making it easy to find the ideal time.

Do AWST and HST ever have the same time?

No, AWST and HST are always 18 hours apart and never display the same clock time simultaneously. Neither timezone observes DST, so the difference is constant year-round with no seasonal variation. The 18 hours offset is determined by their fixed positions relative to the Prime Meridian (UTC). You can always rely on this consistent difference when planning across these timezones.

AWST to HST Converter

Convert Australian Western Standard Time to Hawaii Standard Time. See the hour-by-hour conversion table below.

Timezone Details

Australian Western Standard Time

3:37 PM

Monday, October 19, 2026

AWST (UTC+08:00)

Hawaii Standard Time

9:37 PM

Sunday, October 18, 2026

HST (UTC-10:00)

Difference: -18 hours

AWST DST: No

HST DST: No

24-Hour Overview

AWST — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

HST — 24-hour overview

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

12a12a

3a3a

NightMorningBusinessEvening

Frequently Asked Questions

Related Conversions

HST to AWST

Cities in These Timezones

AWST Cities

Perth

HST Cities

Honolulu

More Tools

Compare AWST & HST Plan a Meeting (AWST & HST)See on Map

Learn More

How Time Zones Work Understanding DST Timezone Abbreviations

External Resources

Australian Western Standard Time on Wikipedia Hawaii Standard Time on Wikipedia IANA Time Zone Database