JST to AST Time Converter
Japan Standard Time to Atlantic Standard Time — live converter with a full hour-by-hour table
Right now it is 05:32 in JST (UTC+09:00) and 17:32 in AST (UTC-03:00). AST is 12 hours behind JST (−12h).
Time now in JST
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Time now in AST
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JST to AST conversion table
| JST | AST | JST | AST |
|---|---|---|---|
| 00:00 | 12:00 | 12:00 | 00:00 |
| 01:00 | 13:00 | 13:00 | 01:00 |
| 02:00 | 14:00 | 14:00 | 02:00 |
| 03:00 | 15:00 | 15:00 | 03:00 |
| 04:00 | 16:00 | 16:00 | 04:00 |
| 05:00 | 17:00 | 17:00 | 05:00 |
| 06:00 | 18:00 | 18:00 | 06:00 |
| 07:00 | 19:00 | 19:00 | 07:00 |
| 08:00 | 20:00 | 20:00 | 08:00 |
| 09:00 | 21:00 | 21:00 | 09:00 |
| 10:00 | 22:00 | 22:00 | 10:00 |
| 11:00 | 23:00 | 23:00 | 11:00 |
Best time to call or meet
Standard business hours, expressed in both zones:
- 9:00–17:00 in JST is 21:00 to 05:00 in AST
- 9:00–17:00 in AST is 21:00 to 05:00 in JST
FAQ
What is the time difference between JST and AST?
AST is 12 hours behind JST. JST is UTC+09:00 and AST is UTC-03:00.
What is the best time to call from JST to AST?
9:00 to 17:00 in JST corresponds to 21:00 to 05:00 in AST. Schedule calls inside the business-hours overlap of both zones.
More about these zones
- Japan Standard TimeUTC+09:00
- Atlantic Standard TimeUTC-03:00
- Convert AST to JST insteadreverse direction
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