JST to AST time converter
Atlantic Time (AST) is 13 hours behind Japan Standard Time (JST) in January and 12 hours behind in July, because daylight saving time shifts the difference. Use the grid below to line up Tokyo and Halifax: drag the cursor across the day, and working hours (9 AM–5 PM) are highlighted in every row so you can spot a slot that suits both sides.
Right now it is 18:43 JST in Tokyo and 06:43 ADT in Halifax.
2/10 zones · drag the tape, scroll sideways or use the arrow keys; Home jumps back to now.
JST to AST: frequently asked
What is the time difference between JST and AST?
Atlantic Time (AST) is 13 hours behind Japan Standard Time (JST) in January and 12 hours behind in July, because daylight saving time shifts the difference.
What time is 9 AM JST in AST?
9:00 AM JST is 8:00 PM AST the previous day in January, and 9:00 PM AST the previous day in July.
When do working hours overlap between Tokyo and Halifax?
In January: Standard 9:00 AM–5:00 PM working hours never overlap. The closest fit is 10:00 PM JST, which is 9:00 AM AST. In July: Standard 9:00 AM–5:00 PM working hours never overlap. The closest fit is 9:00 PM JST, which is 9:00 AM AST.