ACST to JST converter

Australian Central Time (Adelaide) to Japan Time (Tokyo, Osaka).

ACST10:37 AMSat 31 Oct 2026

→

JST9:07 AMSat 31 Oct 2026

JST is 1 h 30 min behind ACST.

Pick a time in ACST

⇄ JST to ACST

9:00 AM ACST = 7:30 AM JST same day

Best time to meet

The best time to meet is between 11:00 AM and 5:00 PM ACST, which is 9:30 AM to 3:30 PM JST. Both sides are then inside 9 AM to 5 PM.

ACST to JST time table

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

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

Quick answers

9:00 AM ACST = 7:30 AM JST
12:00 PM ACST = 10:30 AM JST
3:00 PM ACST = 1:30 PM JST
5:00 PM ACST = 3:30 PM JST
9:00 AM JST = 10:30 AM ACST
12:00 PM JST = 1:30 PM ACST
5:00 PM JST = 6:30 PM ACST

Does the gap change during the year?

Yes, because of daylight saving. Until 4 Apr 2027: JST is 1 h 30 min behind ACST. From 4 Apr 2027 to 3 Oct 2027: JST is 30 min behind ACST. From 3 Oct 2027 to 2 Apr 2028: JST is 1 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). JST does not change its clocks.

About ACST and JST

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.

JST here means Japan Time, the clock in Tokyo, Osaka. Right now it is UTC+9. 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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