JST: Japan Standard Time
Japan Standard Time (JST). All of Japan, including Tokyo and Osaka. JST is UTC+9 all year.
No clock change is scheduled; the offset stays the same all year.
JST to MST: Japan Standard Time to Mountain Time
16 hours behind JST
MST compared with JST, right now. Swap: MST to JST ⇄
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JST to MST conversion table
For Tuesday, November 3, 2026. Rows where both places are inside 9 AM–5 PM are highlighted.
| JST | MST |
|---|---|
| 12:00 AM | 8:00 AM (previous day) |
| 1:00 AM | 9:00 AM (previous day) |
| 2:00 AM | 10:00 AM (previous day) |
| 3:00 AM | 11:00 AM (previous day) |
| 4:00 AM | 12:00 PM (previous day) |
| 5:00 AM | 1:00 PM (previous day) |
| 6:00 AM | 2:00 PM (previous day) |
| 7:00 AM | 3:00 PM (previous day) |
| 8:00 AM | 4:00 PM (previous day) |
| 9:00 AM | 5:00 PM (previous day) |
| 10:00 AM | 6:00 PM (previous day) |
| 11:00 AM | 7:00 PM (previous day) |
| 12:00 PM | 8:00 PM (previous day) |
| 1:00 PM | 9:00 PM (previous day) |
| 2:00 PM | 10:00 PM (previous day) |
| 3:00 PM | 11:00 PM (previous day) |
| 4:00 PM | 12:00 AM |
| 5:00 PM | 1:00 AM |
| 6:00 PM | 2:00 AM |
| 7:00 PM | 3:00 AM |
| 8:00 PM | 4:00 AM |
| 9:00 PM | 5:00 AM |
| 10:00 PM | 6:00 AM |
| 11:00 PM | 7:00 AM |
About these time zones
MST: Mountain Standard Time
Mountain Time (MST/MDT). Denver, Salt Lake City, Albuquerque, Boise and Calgary. MST is UTC−7; in summer most of the region uses MDT, UTC−6. Most of Arizona stays on MST all year.
Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−7 → UTC−6).
Questions about JST and MST time
What is the time difference between JST and MST?
The current difference is shown at the top of this page. JST uses Japan Standard Time (JST, UTC+9) all year; MST uses Mountain Standard Time (MST, UTC−7) as standard time and Mountain Daylight Time (MDT, UTC−6) during daylight saving time. The difference can change if only one side observes daylight saving time or if their clocks change on different dates. Choose your meeting date in the converter to check the applicable offset.
When it is 9:00 AM in JST, what time is it in MST?
On Tuesday, November 3, 2026, 9:00 AM in JST was 5:00 PM (previous day) in MST. The conversion table above shows today’s values.
Do the clocks change in JST or MST?
JST does not change its clocks. MST: Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−7 → UTC−6).
Is JST the same as JST?
Japan Standard Time does not use daylight saving time, so JST applies all year.
Related conversions
- JST to UTC
- JST to GMT
- JST to EST
- JST to CST
- JST to PST
- JST to AKST
- JST to HST
- JST to AST
- JST to BST
- JST to CET
- JST to EET
- JST to PKT
- JST to IST
- JST to SGT
- JST to PHT
- JST to KST
- JST to AEST
- JST to NZST
- UTC to MST
- GMT to MST
- EST to MST
- CST to MST
- PST to MST
- AKST to MST
- HST to MST
- AST to MST
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