MeanwhileAST to JST converter
Atlantic Time (Halifax) to Japan Time (Tokyo, Osaka).
JST is 12 h ahead of AST.
9:00 AM AST = 9:00 PM JST same 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.
AST to JST time table
For 30 Oct 2026. Green rows: both sides between 9 AM and 5 PM.
| AST | JST |
|---|---|
| 12:00 AM AST | 12:00 PM JST |
| 1:00 AM AST | 1:00 PM JST |
| 2:00 AM AST | 2:00 PM JST |
| 3:00 AM AST | 3:00 PM JST |
| 4:00 AM AST | 4:00 PM JST |
| 5:00 AM AST | 5:00 PM JST |
| 6:00 AM AST | 6:00 PM JST |
| 7:00 AM AST | 7:00 PM JST |
| 8:00 AM AST | 8:00 PM JST |
| 9:00 AM AST | 9:00 PM JST |
| 10:00 AM AST | 10:00 PM JST |
| 11:00 AM AST | 11:00 PM JST |
| 12:00 PM AST | 12:00 AM JST next day |
| 1:00 PM AST | 1:00 AM JST next day |
| 2:00 PM AST | 2:00 AM JST next day |
| 3:00 PM AST | 3:00 AM JST next day |
| 4:00 PM AST | 4:00 AM JST next day |
| 5:00 PM AST | 5:00 AM JST next day |
| 6:00 PM AST | 6:00 AM JST next day |
| 7:00 PM AST | 7:00 AM JST next day |
| 8:00 PM AST | 8:00 AM JST next day |
| 9:00 PM AST | 9:00 AM JST next day |
| 10:00 PM AST | 10:00 AM JST next day |
| 11:00 PM AST | 11:00 AM JST next day |
Quick answers
- 9:00 AM AST = 9:00 PM JST
- 12:00 PM AST = 12:00 AM JST (next day)
- 3:00 PM AST = 3:00 AM JST (next day)
- 5:00 PM AST = 5:00 AM JST (next day)
- 9:00 AM JST = 9:00 PM AST (previous day)
- 12:00 PM JST = 12:00 AM AST
- 5:00 PM JST = 5:00 AM AST
Does the gap change during the year?
Yes, because of daylight saving. Until 1 Nov 2026: JST is 12 h ahead of AST. From 1 Nov 2026 to 14 Mar 2027: JST is 13 h ahead of AST. From 14 Mar 2027 to 7 Nov 2027: JST is 12 h ahead of AST.
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). JST does not change its clocks.
About AST and JST
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.
JST here means Japan Time, the clock in Tokyo, Osaka. Right now it is UTC+9. It has no daylight saving.
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Coming soonMore conversions
AST to EST AST to CST AST to MST AST to PST AST to AKST AST to HST AST to NST AST to BRT AST to ART AST to COT AST to CLT AST to UTC AST to GMT AST to BST AST to CET AST to EET AST to MSK AST to TRT AST to SAST AST to WAT AST to EAT AST to GST AST to IRST AST to AFT AST to PKT AST to IST AST to NPT AST to BDT AST to ICT AST to WIB AST to SGT AST to HKT AST to PHT AST to KST AST to AWST AST to ACST AST to AEST AST to NZST
Time in Halifax Time in Tokyo Time in Yokohama Time in Osaka Time in Nagoya Time in Sapporo Time in Fukuoka Time in Kawasaki Time in Kobe