From
JST
Time Converter
JST to AST Time Converter
Convert Japan Time to Atlantic Time with a live clock and clean permalinks.
To
AST / ADT
When it is 7:30 AM in Japan Time, it is 7:30 PM in Atlantic Time.
JST to AST at a glance
Atlantic Time is 12 hours behind Japan Time. If someone gives you a time in Japan Time, move the clock by 12 hours to read it in Atlantic Time. A 9:00 AM start in Tokyo becomes 9:00 PM in Halifax.
What Japan Time covers
Japan Time is used throughout Japan. Tokyo follows it year-round without daylight saving changes. It is helpful for manufacturing, gaming, and business coordination with Japan-based teams.
What Atlantic Time covers
Atlantic Time is used in eastern Canada and parts of the Caribbean. Halifax is a common city reference for it. It matters when scheduling across North America and island markets farther east.
Quick answers
What is the time difference between JST and AST?
Atlantic Time is 12 hours behind Japan Time.
What happens to a 3:00 PM meeting in JST?
It lands at 3:00 AM in AST.
Does daylight saving time matter for JST to AST?
Japan Time and Atlantic Time are shown using the offsets that are active right now, so the result already reflects any daylight saving change in effect today.