From
AST / ADT
Time Converter
AST to JST Time Converter
Convert Atlantic Time to Japan Time with a live clock and clean permalinks.
To
JST
When it is 7:30 AM in Atlantic Time, it is 7:30 PM in Japan Time.
AST to JST at a glance
Japan Time is 12 hours ahead of Atlantic Time. If someone gives you a time in Atlantic Time, move the clock by 12 hours to read it in Japan Time. A 9:00 AM start in Halifax becomes 9:00 PM in Tokyo.
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.
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.
Quick answers
What is the time difference between AST and JST?
Japan Time is 12 hours ahead of Atlantic Time.
What happens to a 3:00 PM meeting in AST?
It lands at 3:00 AM in JST.
Does daylight saving time matter for AST to JST?
Atlantic Time and Japan Time are shown using the offsets that are active right now, so the result already reflects any daylight saving change in effect today.