From
MST / MDT
Time Converter
MST to JST Time Converter
Convert Mountain Time to Japan Time with a live clock and clean permalinks.
To
JST
When it is 7:30 AM in Mountain Time, it is 10:30 PM in Japan Time.
MST to JST at a glance
Japan Time is 15 hours ahead of Mountain Time. If someone gives you a time in Mountain Time, move the clock by 15 hours to read it in Japan Time. A 9:00 AM start in Denver becomes 12:00 AM in Tokyo.
What Mountain Time covers
Mountain Time is used across the US and Canada in cities such as Denver and Calgary. It is useful when you work with logistics, field teams, or regional teams across the western half of North America.
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 MST and JST?
Japan Time is 15 hours ahead of Mountain Time.
What happens to a 3:00 PM meeting in MST?
It lands at 6:00 AM in JST.
Does daylight saving time matter for MST to JST?
Mountain 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.