MeanwhileMST to JST converter
Mountain Time (Denver, Salt Lake City, Calgary) to Japan Time (Tokyo, Osaka).
JST is 15 h ahead of MST.
9:00 AM MST = 12:00 AM JST next day
Best time to meet
No hour falls inside 9 AM to 5 PM in both places. The least painful: around 4:00 PM MST, which is 7:00 AM JST.
MST to JST time table
For 30 Oct 2026. Green rows: both sides between 9 AM and 5 PM.
| MST | JST |
|---|---|
| 12:00 AM MST | 3:00 PM JST |
| 1:00 AM MST | 4:00 PM JST |
| 2:00 AM MST | 5:00 PM JST |
| 3:00 AM MST | 6:00 PM JST |
| 4:00 AM MST | 7:00 PM JST |
| 5:00 AM MST | 8:00 PM JST |
| 6:00 AM MST | 9:00 PM JST |
| 7:00 AM MST | 10:00 PM JST |
| 8:00 AM MST | 11:00 PM JST |
| 9:00 AM MST | 12:00 AM JST next day |
| 10:00 AM MST | 1:00 AM JST next day |
| 11:00 AM MST | 2:00 AM JST next day |
| 12:00 PM MST | 3:00 AM JST next day |
| 1:00 PM MST | 4:00 AM JST next day |
| 2:00 PM MST | 5:00 AM JST next day |
| 3:00 PM MST | 6:00 AM JST next day |
| 4:00 PM MST | 7:00 AM JST next day |
| 5:00 PM MST | 8:00 AM JST next day |
| 6:00 PM MST | 9:00 AM JST next day |
| 7:00 PM MST | 10:00 AM JST next day |
| 8:00 PM MST | 11:00 AM JST next day |
| 9:00 PM MST | 12:00 PM JST next day |
| 10:00 PM MST | 1:00 PM JST next day |
| 11:00 PM MST | 2:00 PM JST next day |
Quick answers
- 9:00 AM MST = 12:00 AM JST (next day)
- 12:00 PM MST = 3:00 AM JST (next day)
- 3:00 PM MST = 6:00 AM JST (next day)
- 5:00 PM MST = 8:00 AM JST (next day)
- 9:00 AM JST = 6:00 PM MST (previous day)
- 12:00 PM JST = 9:00 PM MST (previous day)
- 5:00 PM JST = 2:00 AM MST
Does the gap change during the year?
Yes, because of daylight saving. Until 1 Nov 2026: JST is 15 h ahead of MST. From 1 Nov 2026 to 14 Mar 2027: JST is 16 h ahead of MST. From 14 Mar 2027 to 7 Nov 2027: JST is 15 h ahead of MST.
MST next changes its clocks on 1 Nov 2026 (back 1 h, to UTC−7), then on 14 Mar 2027 (forward 1 h, to UTC−6). JST does not change its clocks.
About MST and JST
MST here means Mountain Time, the clock in Denver, Salt Lake City, Calgary. Right now it is UTC−6. Strictly, MST is the winter name; in summer these places use MDT. This page follows their real clock all year.
JST here means Japan Time, the clock in Tokyo, Osaka. Right now it is UTC+9. It has no daylight saving.
Every city on your wrist
Meanwhile puts these times in your Mac menu bar, on your iPhone home screen and on your Apple Watch. Type “3pm Tokyo” and every city answers. Free for 3 cities. Unlock every city on every device once for $4.99, shared with your family. No subscription.
Coming soonMore conversions
MST to EST MST to CST MST to PST MST to AKST MST to HST MST to AST MST to NST MST to BRT MST to ART MST to COT MST to CLT MST to UTC MST to GMT MST to BST MST to CET MST to EET MST to MSK MST to TRT MST to SAST MST to WAT MST to EAT MST to GST MST to IRST MST to AFT MST to PKT MST to IST MST to NPT MST to BDT MST to ICT MST to WIB MST to SGT MST to HKT MST to PHT MST to KST MST to AWST MST to ACST MST to AEST MST to NZST
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