MST to JST Time Converter
Compare MST and JST instantly. The clocks below stay in sync with the IANA time-zone database, so daylight-saving transitions are handled automatically for both Denver and Tokyo.
24-Hour Comparison Timeline
Green = working hours · Yellow = early/late · Red = night
24-hour reference table
| MST (Denver) | JST (Tokyo) |
|---|---|
| 12:00 AM | 03:00 PM |
| 01:00 AM | 04:00 PM |
| 02:00 AM | 05:00 PM |
| 03:00 AM | 06:00 PM |
| 04:00 AM | 07:00 PM |
| 05:00 AM | 08:00 PM |
| 06:00 AM | 09:00 PM |
| 07:00 AM | 10:00 PM |
| 08:00 AM | 11:00 PM |
| 09:00 AM | 12:00 AM(Sun, Jul 26) |
| 10:00 AM | 01:00 AM(Sun, Jul 26) |
| 11:00 AM | 02:00 AM(Sun, Jul 26) |
| 12:00 PM | 03:00 AM(Sun, Jul 26) |
| 01:00 PM | 04:00 AM(Sun, Jul 26) |
| 02:00 PM | 05:00 AM(Sun, Jul 26) |
| 03:00 PM | 06:00 AM(Sun, Jul 26) |
| 04:00 PM | 07:00 AM(Sun, Jul 26) |
| 05:00 PM | 08:00 AM(Sun, Jul 26) |
| 06:00 PM | 09:00 AM(Sun, Jul 26) |
| 07:00 PM | 10:00 AM(Sun, Jul 26) |
| 08:00 PM | 11:00 AM(Sun, Jul 26) |
| 09:00 PM | 12:00 PM(Sun, Jul 26) |
| 10:00 PM | 01:00 PM(Sun, Jul 26) |
| 11:00 PM | 02:00 PM(Sun, Jul 26) |
Daylight saving time
Denver observes daylight saving time; Tokyo does not. Expect a one-hour swing when Denver starts or ends DST.
Working-hours overlap
Standard 9-to-5 hours in Denver and Tokyo do not overlap. Use an early or late slot on one side.
Frequently asked questions
What is the time difference between MST and JST?+
JST (UTC+09:00) is currently 15 hours ahead of MST (UTC-06:00). This page recalculates the offset live from the IANA time-zone database, including any daylight-saving transitions.
Does MST or JST observe daylight saving time?+
Denver observes daylight saving time; Tokyo does not, so the gap changes when Denver springs forward or falls back. Times on this page always reflect the current local rules.
What are the best meeting hours between Denver and Tokyo?+
Standard 9–5 working hours in Denver and Tokyo do not overlap. Pick an early or late slot for one side, or use the 24-hour table above to find a time that works.
How do I quickly convert MST to JST?+
Use the live clocks and 24-hour reference table above. Pick any hour on the MST row to see the matching JST time. The Event Planner also lets you pick a specific date and share it with attendees.