MST → JST Converter
Mountain West to Japan — energy and tech companies.
MST → JST
12:40 PM
Mountain Daylight Time (MDT)
Thursday, June 11, 2026
UTC-6 (DST active)
3:40 AM
Japan Standard Time (GMT+9)
Friday, June 12, 2026
UTC+9 (DST active)
Time Zone Converter
MST·Denver
12:40 PM
Thursday, June 11, 2026
JST·Tokyo
3:40 AM
Friday, June 12, 2026
Compare Times
| MST | JST |
|---|
Morning
| MST | JST |
|---|---|
| 12:00 AM MST | 4:00 PM JST |
| 1:00 AM MST | 5:00 PM JST |
| 2:00 AM MST | 6:00 PM JST |
| 3:00 AM MST | 7:00 PM JST |
| 4:00 AM MST | 8:00 PM JST |
| 5:00 AM MST | 9:00 PM JST |
| 6:00 AM MST | 10:00 PM JST |
| 7:00 AM MST | 11:00 PM JST |
| 8:00 AM MST | 12:00 AM JST |
| 9:00 AM MST | 1:00 AM JST |
| 10:00 AM MST | 2:00 AM JST |
| 11:00 AM MST | 3:00 AM JST |
Afternoon
| MST | JST |
|---|---|
| 12:00 PM MST | 4:00 AM JST |
| 1:00 PM MST | 5:00 AM JST |
| 2:00 PM MST | 6:00 AM JST |
| 3:00 PM MST | 7:00 AM JST |
| 4:00 PM MST | 8:00 AM JST |
Evening
| MST | JST |
|---|---|
| 5:00 PM MST | 9:00 AM JST |
| 6:00 PM MST | 10:00 AM JST |
| 7:00 PM MST | 11:00 AM JST |
| 8:00 PM MST | 12:00 PM JST |
| 9:00 PM MST | 1:00 PM JST |
| 10:00 PM MST | 2:00 PM JST |
| 11:00 PM MST | 3:00 PM JST |
Frequently Asked Questions: MST to JST
What is the time difference between Mountain Time and Japan Standard Time?
JST is 16 hours ahead of MST (standard time).
What time is midnight in MST in JST?
Midnight (12:00 AM) in Mountain Time translates to 4:00 PM JST in Japan Standard Time.
When do business hours overlap between MST and JST?
Standard 9–5 business hours do not overlap between Mountain Time and Japan Standard Time. The closest scheduling window is 07:00–08:00 MST (23:00–00:00 JST).
Common Time Conversions
EST · New York →
CST · Chicago →
MST · Denver →
PST · Los Angeles →
AKST · Anchorage →
HST · Honolulu →
UTC · Universal →
GMT · London →
IST · New Delhi →
CET · Paris →
How Time Zone Conversion Works
Time zone conversion works by comparing the UTC offset of one location to another. Every city or region is measured relative to Coordinated Universal Time (UTC), which acts as the global reference point for civil time.
JST is 16 hours ahead of MST (standard time).
Daylight Saving Time: MST observes DST; JST does not. The offset between them shifts by 1 hour twice a year — in spring and autumn — when MST changes its clocks.
Best time to call Tokyo from Denver
Planning a remote meeting or international call? The optimal business hours overlap between Denver and Tokyo is challenging, with few shared business hours between the two zones.
Try Meeting Planner for multi-city group scheduling →MST
07:00–08:00
Mountain Time
JST
23:00–00:00
Japan Time
Recommended time: 07:00 MST / 23:00 JST
DST schedule for 2026
Current-year daylight saving start and end dates for the selected zones.
MST · Mountain Time
Standard offset −07:00
- Starts
- Mar 8, 2026 · 02:00 → 03:00
- second_sunday_of_march
- Ends
- Nov 1, 2026 · 02:00 → 01:00
- first_sunday_of_november
- Daylight time
- MDT · −06:00
Most of Arizona stays on MST year-round (does not observe DST). The Navajo Nation within Arizona does observe DST.
JST · Japan Time
Standard offset +09:00
Japan Time remains on a constant standard offset for the year.
Japan has not observed daylight saving time since 1951.
Principal Cities
MST — Mountain Time
- PhoenixUnited States
- CalgaryCanada
- EdmontonCanada
- DenverUnited States
JST — Japan Time
- TokyoJapan
- YokohamaJapan
- OsakaJapan
- NagoyaJapan