JST: Japan Standard Time
Japan Standard Time (JST). All of Japan, including Tokyo and Osaka. JST is UTC+9 all year.
No clock change is scheduled; the offset stays the same all year.
JST to AST: Japan Standard Time to Atlantic Time
13 hours behind JST
AST compared with JST, right now. Swap: AST to JST ⇄
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JST to AST conversion table
For Tuesday, November 3, 2026. Rows where both places are inside 9 AM–5 PM are highlighted.
| JST | AST |
|---|---|
| 12:00 AM | 11:00 AM (previous day) |
| 1:00 AM | 12:00 PM (previous day) |
| 2:00 AM | 1:00 PM (previous day) |
| 3:00 AM | 2:00 PM (previous day) |
| 4:00 AM | 3:00 PM (previous day) |
| 5:00 AM | 4:00 PM (previous day) |
| 6:00 AM | 5:00 PM (previous day) |
| 7:00 AM | 6:00 PM (previous day) |
| 8:00 AM | 7:00 PM (previous day) |
| 9:00 AM | 8:00 PM (previous day) |
| 10:00 AM | 9:00 PM (previous day) |
| 11:00 AM | 10:00 PM (previous day) |
| 12:00 PM | 11:00 PM (previous day) |
| 1:00 PM | 12:00 AM |
| 2:00 PM | 1:00 AM |
| 3:00 PM | 2:00 AM |
| 4:00 PM | 3:00 AM |
| 5:00 PM | 4:00 AM |
| 6:00 PM | 5:00 AM |
| 7:00 PM | 6:00 AM |
| 8:00 PM | 7:00 AM |
| 9:00 PM | 8:00 AM |
| 10:00 PM | 9:00 AM |
| 11:00 PM | 10:00 AM |
About these time zones
AST: Atlantic Standard Time
Atlantic Time (AST/ADT). Nova Scotia, New Brunswick and Prince Edward Island (with daylight saving), plus Puerto Rico and much of the Caribbean, which stay on AST (UTC−4) all year.
Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−4 → UTC−3).
Questions about JST and AST time
What is the time difference between JST and AST?
The current difference is shown at the top of this page. JST uses Japan Standard Time (JST, UTC+9) all year; AST uses Atlantic Standard Time (AST, UTC−4) as standard time and Atlantic Daylight Time (ADT, UTC−3) during daylight saving time. The difference can change if only one side observes daylight saving time or if their clocks change on different dates. Choose your meeting date in the converter to check the applicable offset.
When it is 9:00 AM in JST, what time is it in AST?
On Tuesday, November 3, 2026, 9:00 AM in JST was 8:00 PM (previous day) in AST. The conversion table above shows today’s values.
Do the clocks change in JST or AST?
JST does not change its clocks. AST: Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−4 → UTC−3).
Is JST the same as JST?
Japan Standard Time does not use daylight saving time, so JST applies all year.
Related conversions
- JST to UTC
- JST to GMT
- JST to EST
- JST to CST
- JST to MST
- JST to PST
- JST to AKST
- JST to HST
- JST to BST
- JST to CET
- JST to EET
- JST to PKT
- JST to IST
- JST to SGT
- JST to PHT
- JST to KST
- JST to AEST
- JST to NZST
- UTC to AST
- GMT to AST
- EST to AST
- CST to AST
- MST to AST
- PST to AST
- AKST to AST
- HST to AST
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