MST to JST Converter

Convert Mountain Time (MST) to Japan Standard Time (JST), with daylight saving time handled for you.

JST to MST

Now in MST

12:02 PM

Mountain Time · Denver

Now in JST

3:02 AM

Japan Standard Time · Tokyo

Results

12:02 PM MST in JST

3:02 AM

Japan Standard Time · next day · right now JST is 15 hours ahead of MST

Times follow Denver for MST and Tokyo for JST, using the IANA time zone database.

MST to JST time difference

JST is 15 hours ahead of MST for most of 2026, and 16 hours ahead of MST for about 127 days, because daylight saving time changes on different dates.

In 2026, Mountain Time switches to MDT on March 8 and back to MST on November 1. Japan Standard Time does not use daylight saving time.

MST to JST conversion table

Every hour on 2026-09-28. Highlighted rows fall inside 9 AM–5 PM in both zones.

MST (Mountain Time)JST (Japan Standard Time)
12:00 AM3:00 PM
1:00 AM4:00 PM
2:00 AM5:00 PM
3:00 AM6:00 PM
4:00 AM7:00 PM
5:00 AM8:00 PM
6:00 AM9:00 PM
7:00 AM10:00 PM
8:00 AM11:00 PM
9:00 AM12:00 AM · next day
10:00 AM1:00 AM · next day
11:00 AM2:00 AM · next day
12:00 PM3:00 AM · next day
1:00 PM4:00 AM · next day
2:00 PM5:00 AM · next day
3:00 PM6:00 AM · next day
4:00 PM7:00 AM · next day
5:00 PM8:00 AM · next day
6:00 PM9:00 AM · next day
7:00 PM10:00 AM · next day
8:00 PM11:00 AM · next day
9:00 PM12:00 PM · next day
10:00 PM1:00 PM · next day
11:00 PM2:00 PM · next day

Working hours overlap

On 2026-09-28, 9 AM–5 PM workdays in MST and JST don't overlap. Try an early start in one zone and a late finish in the other, or use the meeting planner.

Convert MST to other time zones

How to use

Follow these steps to get a result

  1. Pick a date and a time in Mountain Time (MST).

  2. Read the matching JST time, including whether it falls on the next or previous day.

  3. Scan the 24-hour table to see every hour at once, with shared working hours highlighted.

Features

What this tool includes

  • Live clocks for both time zones

  • Daylight saving time handled automatically

  • 24-hour conversion table

  • Working-hours overlap

FAQ

Common questions about this tool

JST is 15 hours ahead of MST for most of 2026, and 16 hours ahead of MST for about 127 days, because daylight saving time changes on different dates.

Related tools

Continue with something nearby