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MST to JST Time Converter

JST is 16 hours ahead of MST right now. 9:00 AM in MST is 1:00 AM in JST (next day).

Time now: MST and JST

🌐 Mountain Time (US & Canada)4:59 PMMonday, November 9 · UTC-07:00
🌐 Japan Standard Time (JST)8:59 AMTuesday, November 10 · UTC+09:00

JST is 16 hours ahead of MST right now. The gap is not fixed: it is 15 hours at some times of the year and 16 hours at others, because at least one of them changes its clocks for daylight saving time.

MST to JST conversion table

Every hour of the day, using today's time difference.

MSTJST
12:00 AM4:00 PM
1:00 AM5:00 PM
2:00 AM6:00 PM
3:00 AM7:00 PM
4:00 AM8:00 PM
5:00 AM9:00 PM
6:00 AM10:00 PM
7:00 AM11:00 PM
8:00 AM12:00 AMnext day
9:00 AM1:00 AMnext day
10:00 AM2:00 AMnext day
11:00 AM3:00 AMnext day
12:00 PM4:00 AMnext day
1:00 PM5:00 AMnext day
2:00 PM6:00 AMnext day
3:00 PM7:00 AMnext day
4:00 PM8:00 AMnext day
5:00 PM9:00 AMnext day
6:00 PM10:00 AMnext day
7:00 PM11:00 AMnext day
8:00 PM12:00 PMnext day
9:00 PM1:00 PMnext day
10:00 PM2:00 PMnext day
11:00 PM3:00 PMnext day

Best time to meet between MST and JST

Working hours overlap (9 AM – 6 PM in both places):

  • 5:00 PM – 6:00 PM MST = 9:00 AM – 10:00 AM JST

The time difference changes during the year because of daylight saving time, so these windows shift by an hour at other times.

Does the time difference between MST and JST change?

Yes. Right now JST is 16 hours ahead of MST. These are the dates in the next 12 months when the gap changes:

  • Sunday, 14 March 2027: MST moves its clocks forward. JST is 15 hours ahead of MST from then (it was 16 hours before).
  • Sunday, 7 November 2027: MST moves its clocks back. JST is 16 hours ahead of MST from then (it was 15 hours before).

Office hours in each other's time

  • 9 AM to 6 PM in MST is 1:00 AM (next day) to 10:00 AM (next day) in JST.
  • 9 AM to 6 PM in JST is 5:00 PM (previous day) to 2:00 AM in MST.

Based on today's clock settings.

Frequently asked questions

What is the time difference between MST and JST?

JST is 16 hours ahead of MST right now. The gap is not fixed: it is 15 hours at some times of the year and 16 hours at others, because at least one of them changes its clocks for daylight saving time.

How do I convert MST to JST?

Add 16 hours to the MST time to get the JST time (at today's difference). 9:00 AM in MST is 1:00 AM in JST (next day). Or use the converter above and pick any date and time.

What is the current time in JST?

It is 8:59 AM in JST on Tuesday, November 10 (the converter above shows it live). At the same moment it is 4:59 PM in MST.

Does the time difference between MST and JST change during the year?

Yes. Right now JST is 16 hours ahead of MST. Over the next 12 months the gap changes 2 times: Sunday, 14 March 2027: MST moves its clocks forward. JST is 15 hours ahead of MST from then (it was 16 hours before). Sunday, 7 November 2027: MST moves its clocks back. JST is 16 hours ahead of MST from then (it was 15 hours before).

What is the best time for a meeting between MST and JST?

Between 9 AM and 6 PM in both places you can meet at 5:00 PM – 6:00 PM MST = 9:00 AM – 10:00 AM JST. Check the overlap section on this page for every option.

What does MST mean?

Mountain Time is MST (UTC-07:00) in winter and MDT (UTC-06:00) in summer. Arizona stays on MST all year.

More conversions

Open the converter →
JST to MST 📅 Plan a meeting: MST & JST MST to IST MST to KST MST to MSK MST to PKT MST to WAT MST to BST MST to EST CST to JST IST to JST UTC to JST JST to CST JST to PKT