MeanwhileJST to AST converter
Japan Time (Tokyo, Osaka) to Atlantic Time (Halifax).
AST is 12 h behind JST.
9:00 AM JST = 9:00 PM AST previous day
Best time to meet
No hour falls inside 9 AM to 5 PM in both places, so one side always meets outside office hours.
JST to AST time table
For 31 Oct 2026. Green rows: both sides between 9 AM and 5 PM.
| JST | AST |
|---|---|
| 12:00 AM JST | 12:00 PM AST previous day |
| 1:00 AM JST | 1:00 PM AST previous day |
| 2:00 AM JST | 2:00 PM AST previous day |
| 3:00 AM JST | 3:00 PM AST previous day |
| 4:00 AM JST | 4:00 PM AST previous day |
| 5:00 AM JST | 5:00 PM AST previous day |
| 6:00 AM JST | 6:00 PM AST previous day |
| 7:00 AM JST | 7:00 PM AST previous day |
| 8:00 AM JST | 8:00 PM AST previous day |
| 9:00 AM JST | 9:00 PM AST previous day |
| 10:00 AM JST | 10:00 PM AST previous day |
| 11:00 AM JST | 11:00 PM AST previous day |
| 12:00 PM JST | 12:00 AM AST |
| 1:00 PM JST | 1:00 AM AST |
| 2:00 PM JST | 2:00 AM AST |
| 3:00 PM JST | 3:00 AM AST |
| 4:00 PM JST | 4:00 AM AST |
| 5:00 PM JST | 5:00 AM AST |
| 6:00 PM JST | 6:00 AM AST |
| 7:00 PM JST | 7:00 AM AST |
| 8:00 PM JST | 8:00 AM AST |
| 9:00 PM JST | 9:00 AM AST |
| 10:00 PM JST | 10:00 AM AST |
| 11:00 PM JST | 11:00 AM AST |
Quick answers
- 9:00 AM JST = 9:00 PM AST (previous day)
- 12:00 PM JST = 12:00 AM AST
- 3:00 PM JST = 3:00 AM AST
- 5:00 PM JST = 5:00 AM AST
- 9:00 AM AST = 9:00 PM JST
- 12:00 PM AST = 12:00 AM JST (next day)
- 5:00 PM AST = 5:00 AM JST (next day)
Does the gap change during the year?
Yes, because of daylight saving. Until 1 Nov 2026: AST is 12 h behind JST. From 1 Nov 2026 to 14 Mar 2027: AST is 13 h behind JST. From 14 Mar 2027 to 7 Nov 2027: AST is 12 h behind JST.
JST does not change its clocks. AST next changes its clocks on 1 Nov 2026 (back 1 h, to UTC−4), then on 14 Mar 2027 (forward 1 h, to UTC−3).
About JST and AST
JST here means Japan Time, the clock in Tokyo, Osaka. Right now it is UTC+9. It has no daylight saving.
AST here means Atlantic Time, the clock in Halifax. Right now it is UTC−3. Strictly, AST is the winter name; in summer these places use ADT. This page follows their real clock all year.
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