ACST to HST converter

Australian Central Time (Adelaide) to Hawaii Time (Honolulu).

ACST10:37 AMSat 31 Oct 2026

→

HST2:07 PMFri 30 Oct 2026

HST is 20 h 30 min behind ACST.

Pick a time in ACST

⇄ HST to ACST

9:00 AM ACST = 12:30 PM HST previous day

Best time to meet

The best time to meet is between 9:00 AM and 2:00 PM ACST, which is 12:30 PM to 5:30 PM HST. Both sides are then inside 9 AM to 5 PM.

ACST to HST time table

For 31 Oct 2026. Green rows: both sides between 9 AM and 5 PM.

ACST	HST
12:00 AM ACST	3:30 AM HST previous day
1:00 AM ACST	4:30 AM HST previous day
2:00 AM ACST	5:30 AM HST previous day
3:00 AM ACST	6:30 AM HST previous day
4:00 AM ACST	7:30 AM HST previous day
5:00 AM ACST	8:30 AM HST previous day
6:00 AM ACST	9:30 AM HST previous day
7:00 AM ACST	10:30 AM HST previous day
8:00 AM ACST	11:30 AM HST previous day
9:00 AM ACST	12:30 PM HST previous day
10:00 AM ACST	1:30 PM HST previous day
11:00 AM ACST	2:30 PM HST previous day
12:00 PM ACST	3:30 PM HST previous day
1:00 PM ACST	4:30 PM HST previous day
2:00 PM ACST	5:30 PM HST previous day
3:00 PM ACST	6:30 PM HST previous day
4:00 PM ACST	7:30 PM HST previous day
5:00 PM ACST	8:30 PM HST previous day
6:00 PM ACST	9:30 PM HST previous day
7:00 PM ACST	10:30 PM HST previous day
8:00 PM ACST	11:30 PM HST previous day
9:00 PM ACST	12:30 AM HST
10:00 PM ACST	1:30 AM HST
11:00 PM ACST	2:30 AM HST

Quick answers

9:00 AM ACST = 12:30 PM HST (previous day)
12:00 PM ACST = 3:30 PM HST (previous day)
3:00 PM ACST = 6:30 PM HST (previous day)
5:00 PM ACST = 8:30 PM HST (previous day)
9:00 AM HST = 5:30 AM ACST (next day)
12:00 PM HST = 8:30 AM ACST (next day)
5:00 PM HST = 1:30 PM ACST (next day)

Does the gap change during the year?

Yes, because of daylight saving. Until 4 Apr 2027: HST is 20 h 30 min behind ACST. From 4 Apr 2027 to 3 Oct 2027: HST is 19 h 30 min behind ACST. From 3 Oct 2027 to 2 Apr 2028: HST is 20 h 30 min behind ACST.

ACST next changes its clocks on 4 Apr 2027 (back 1 h, to UTC+9:30), then on 3 Oct 2027 (forward 1 h, to UTC+10:30). HST does not change its clocks.

About ACST and HST

ACST here means Australian Central Time, the clock in Adelaide. Right now it is UTC+10:30. Strictly, ACST is the winter name; in summer these places use ACDT. This page follows their real clock all year.

HST here means Hawaii Time, the clock in Honolulu. Right now it is UTC−10. It has no daylight saving.

Every city on your wrist

Meanwhile puts these times in your Mac menu bar, on your iPhone home screen and on your Apple Watch. Type “3pm Tokyo” and every city answers. Free for 3 cities. Unlock every city on every device once for $4.99, shared with your family. No subscription.

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