ACST to HST

Australian Central Standard Time

Fri Jun, 19, 2026
4:38 PM

Australian Central Standard Time (ACST)

ACST is 9 hours 30 minutes ahead of Universal Time (UTC+9)

Hawaii Standard Time

Thu Jun, 18, 2026
9:08 PM

Hawaii Standard Time (HST)

HST is 10 hours behind Universal Time (UTC-1)

ACST to HST Time Conversion

When it is 12:00 PM in ACST, it is 4:30 PM the previous day in HST.

📞The best time to schedule a call is between 9 AM and 1 PM in ACST, which is between 1 PM and 5 PM in HST.

Time difference between ACST and HST

ACST is 19 hours 30 minutes ahead of HST.

🕐 Subtract 19 hours 30 minutes from ACST time to get HST time.

ACST uses 9 hours 30 minutes ahead of Universal Time (UTC+9) and HST uses 10 hours behind Universal Time (UTC-1).

ACST to HST time conversion chart (24 hours)

Highlighted rows are overlapping 9-to-5 business hours – the best time to schedule a call between ACST and HST.
ACST Time HST Time
12 AM ACST Time 4 AM HST Time
1 AM ACST Time 5 AM HST Time
2 AM ACST Time 6 AM HST Time
3 AM ACST Time 7 AM HST Time
4 AM ACST Time 8 AM HST Time
5 AM ACST Time 9 AM HST Time
6 AM ACST Time 10 AM HST Time
7 AM ACST Time 11 AM HST Time
8 AM ACST Time 12 PM HST Time
9 AM ACST Time 1 PM HST Time
10 AM ACST Time 2 PM HST Time
11 AM ACST Time 3 PM HST Time
ACST Time HST Time
12 PM ACST Time 4 PM HST Time
1 PM ACST Time 5 PM HST Time
2 PM ACST Time 6 PM HST Time
3 PM ACST Time 7 PM HST Time
4 PM ACST Time 8 PM HST Time
5 PM ACST Time 9 PM HST Time
6 PM ACST Time 10 PM HST Time
7 PM ACST Time 11 PM HST Time
8 PM ACST Time 12 AM HST Time
9 PM ACST Time 1 AM HST Time
10 PM ACST Time 2 AM HST Time
11 PM ACST Time 3 AM HST Time

ACST to HST - Frequently Asked Questions

Q

What is the time difference between ACST and HST?

A

ACST is 19 hours 30 minutes ahead of HST.

Q

Is ACST ahead of or behind HST?

A

ACST is ahead of HST by 19 hours 30 minutes.

Q

When it is 9:00 AM in ACST, what time is it in HST?

A

It is 1:30 PM the previous day in HST.