MeanwhileJST to ACST converter
Japan Time (Tokyo, Osaka) to Australian Central Time (Adelaide).
ACST is 1 h 30 min ahead of JST.
9:00 AM JST = 10:30 AM ACST same day
Best time to meet
The best time to meet is between 9:00 AM and 4:00 PM JST, which is 10:30 AM to 5:30 PM ACST. Both sides are then inside 9 AM to 5 PM.
JST to ACST time table
For 31 Oct 2026. Green rows: both sides between 9 AM and 5 PM.
| JST | ACST |
|---|---|
| 12:00 AM JST | 1:30 AM ACST |
| 1:00 AM JST | 2:30 AM ACST |
| 2:00 AM JST | 3:30 AM ACST |
| 3:00 AM JST | 4:30 AM ACST |
| 4:00 AM JST | 5:30 AM ACST |
| 5:00 AM JST | 6:30 AM ACST |
| 6:00 AM JST | 7:30 AM ACST |
| 7:00 AM JST | 8:30 AM ACST |
| 8:00 AM JST | 9:30 AM ACST |
| 9:00 AM JST | 10:30 AM ACST |
| 10:00 AM JST | 11:30 AM ACST |
| 11:00 AM JST | 12:30 PM ACST |
| 12:00 PM JST | 1:30 PM ACST |
| 1:00 PM JST | 2:30 PM ACST |
| 2:00 PM JST | 3:30 PM ACST |
| 3:00 PM JST | 4:30 PM ACST |
| 4:00 PM JST | 5:30 PM ACST |
| 5:00 PM JST | 6:30 PM ACST |
| 6:00 PM JST | 7:30 PM ACST |
| 7:00 PM JST | 8:30 PM ACST |
| 8:00 PM JST | 9:30 PM ACST |
| 9:00 PM JST | 10:30 PM ACST |
| 10:00 PM JST | 11:30 PM ACST |
| 11:00 PM JST | 12:30 AM ACST next day |
Quick answers
- 9:00 AM JST = 10:30 AM ACST
- 12:00 PM JST = 1:30 PM ACST
- 3:00 PM JST = 4:30 PM ACST
- 5:00 PM JST = 6:30 PM ACST
- 9:00 AM ACST = 7:30 AM JST
- 12:00 PM ACST = 10:30 AM JST
- 5:00 PM ACST = 3:30 PM JST
Does the gap change during the year?
Yes, because of daylight saving. Until 4 Apr 2027: ACST is 1 h 30 min ahead of JST. From 4 Apr 2027 to 3 Oct 2027: ACST is 30 min ahead of JST. From 3 Oct 2027 to 2 Apr 2028: ACST is 1 h 30 min ahead of JST.
JST does not change its clocks. 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).
About JST and ACST
JST here means Japan Time, the clock in Tokyo, Osaka. Right now it is UTC+9. It has no daylight saving.
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.
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