JST to MST time converter
Mountain Time (MST) is 16 hours behind Japan Standard Time (JST) in January and 15 hours behind in July, because daylight saving time shifts the difference. Use the grid below to line up Tokyo and Denver: 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 03:43 MDT in Denver.
2/10 zones · drag the tape, scroll sideways or use the arrow keys; Home jumps back to now.
JST to MST: frequently asked
What is the time difference between JST and MST?
Mountain Time (MST) is 16 hours behind Japan Standard Time (JST) in January and 15 hours behind in July, because daylight saving time shifts the difference.
What time is 9 AM JST in MST?
9:00 AM JST is 5:00 PM MST the previous day in January, and 6:00 PM MST the previous day in July.
When do working hours overlap between Tokyo and Denver?
In January: Standard 9:00 AM–5:00 PM working hours never overlap. The closest fit is 1:00 AM JST, which is 9:00 AM MST. In July: Standard 9:00 AM–5:00 PM working hours never overlap. The closest fit is 12:00 AM JST, which is 9:00 AM MST.