Japan Standard Time to Canada Atlantic Time
Convert times between Japan Standard Time (JST, UTC+9:00) and Canada Atlantic Time (AST, UTC-4:00). Canada Atlantic Time is 13 hours behind Japan Standard Time in standard time. During daylight saving time this difference changes to 12 hours.
UTC+9:00→UTC-4:00 / -3:00
Live timezone converterUTC Offset Reference
| Timezone | Abbreviation | Standard offset | DST offset | Country |
|---|---|---|---|---|
| Japan Standard Time | JST | UTC+9:00 | — | Japan |
| Canada Atlantic Time | AST / ADT | UTC-4:00 | UTC-3:00 | Canada |
* DST offset applies during summer months. Exact transition dates vary by year.
Standard Time Conversion (JST → AST)
| Japan Standard Time | Canada Atlantic Time |
|---|---|
| 12:00 AM JST | 11:00 AM (prev day) AST |
| 6:00 AM JST | 5:00 PM (prev day) AST |
| 9:00 AM JST | 8:00 PM (prev day) AST |
| 12:00 PM JST | 11:00 PM (prev day) AST |
| 3:00 PM JST | 2:00 AM AST |
| 6:00 PM JST | 5:00 AM AST |
| 9:00 PM JST | 8:00 AM AST |
Summer (DST) Conversion (JST → ADT)
| Japan Standard Time (summer) | Canada Atlantic Time (summer) |
|---|---|
| 12:00 AM JST | 12:00 PM (prev day) ADT |
| 6:00 AM JST | 6:00 PM (prev day) ADT |
| 9:00 AM JST | 9:00 PM (prev day) ADT |
| 12:00 PM JST | 12:00 AM ADT |
| 3:00 PM JST | 3:00 AM ADT |
| 6:00 PM JST | 6:00 AM ADT |
| 9:00 PM JST | 9:00 AM ADT |
Daylight Saving Time (DST) Notes
- Canada Atlantic Time observes DST. Clocks advance 1 hour to ADT (UTC-3:00) roughly from month 3 to 11.
- The offset difference shifts between 13h (standard) and 12h (DST season). Always verify the current offset using the live converter below.
Frequently Asked Questions
How do I convert JST to AST?
Add (-13) hours to the JST time to get AST. For example, 9:00 AM JST = 8:00 PM AST.
What is the current UTC offset for Japan Standard Time?
Japan Standard Time is always UTC+9:00 (JST) — it does not observe DST.
Is Canada Atlantic Time ahead or behind Japan Standard Time?
Canada Atlantic Time is 13 hours behind Japan Standard Time in standard time.
When is a good time to schedule a meeting between JST and AST?
Due to the 13-hour difference, business-hours overlap may be limited. Use the live timezone converter to find a mutually convenient time.
Related Timezone Conversions
Japan Standard Time → US Eastern TimeJST / ESTJapan Standard Time → US Central TimeJST / CSTJapan Standard Time → US Mountain TimeJST / MSTJapan Standard Time → US Pacific TimeJST / PSTJapan Standard Time → US Alaska TimeJST / AKSTJapan Standard Time → Hawaii TimeJST / HSTJapan Standard Time → China Standard TimeJST / CSTJapan Standard Time → Hong Kong TimeJST / HKT
Need the exact current time?
Use the live ToolsHub timezone converter to see current times, DST status, and schedule across time zones.