Timezone conversion
MST to JST Time — Convert Mountain Standard Time (US) to Japan Standard Time
JST is currently 15 hours ahead of MST. The gap shifts across the year: around January it is 16 hours ahead of MST, and around July it is 15 hours ahead of MST, because one or both zones observe daylight saving.
JST is currently 15 hours ahead of MST.
MST • MDT (UTC-6)
11:16 AM
Wednesday, Jul 8
JST • GMT+9 (UTC+9)
2:16 AM
Thursday, Jul 9
Abbreviation disambiguation
MST here means Mountain Standard Time (US). Note: Phoenix observes MST year-round (no DST)
Interactive converter
12:00PM
12
:00
Full MST to JST conversion table
| MST | JST |
|---|---|
| 12:00 AM | 3:00 PM |
| 1:00 AM | 4:00 PM |
| 2:00 AM | 5:00 PM |
| 3:00 AM | 6:00 PM |
| 4:00 AM | 7:00 PM |
| 5:00 AM | 8:00 PM |
| 6:00 AM | 9:00 PM |
| 7:00 AM | 10:00 PM |
| 8:00 AM | 11:00 PM |
| 9:00 AM | 12:00 AM(next day) |
| 10:00 AM | 1:00 AM(next day) |
| 11:00 AM | 2:00 AM(next day) |
| 12:00 PM | 3:00 AM(next day) |
| 1:00 PM | 4:00 AM(next day) |
| 2:00 PM | 5:00 AM(next day) |
| 3:00 PM | 6:00 AM(next day) |
| 4:00 PM | 7:00 AM(next day) |
| 5:00 PM | 8:00 AM(next day) |
| 6:00 PM | 9:00 AM(next day) |
| 7:00 PM | 10:00 AM(next day) |
| 8:00 PM | 11:00 AM(next day) |
| 9:00 PM | 12:00 PM(next day) |
| 10:00 PM | 1:00 PM(next day) |
| 11:00 PM | 2:00 PM(next day) |
Daylight saving and how the gap changes
Around January the MST → JST offset is 16 hours ahead of MST. Around July it is 15 hours ahead of MST. That swing comes from one or both zones observing daylight saving on different schedules — the converter above always reflects the correct offset for the date you pick.
Frequently asked questions
- Is JST ahead of or behind MST right now?
- JST is currently 15 hours ahead of MST.
- What is the current MST to JST time difference?
- Right now the gap is 15 hours ahead — JST is 15 hours ahead of MST.
- Does the MST → JST offset change during the year?
- Yes. Around January the offset is 16 hours ahead of MST; around July it is 15 hours ahead of MST. The converter above always reflects the correct offset for the date you pick.
- Does MST observe daylight saving time?
- Yes — Mountain Standard Time (US) observes DST, so its UTC offset shifts by 1 hour(s) between winter and summer.
- Does JST observe daylight saving time?
- No — Japan Standard Time stays at a fixed UTC offset year-round.
- What time is 9 AM MST in JST?
- 9:00 AM MST is 12:00 AM (next day) JST.
- What time is 12 PM (noon) MST in JST?
- 12:00 PM MST is 3:00 AM (next day) JST.
- What time is 5 PM MST in JST?
- 5:00 PM MST is 8:00 AM (next day) JST.
- When is the best time to schedule a call between MST and JST?
- MST and JST have no direct 09:00–17:00 overlap on the same calendar day. Consider early-morning or late-evening slots on one side, or an asynchronous handoff.
- What time zone does MST refer to?
- MST refers to Mountain Standard Time (US) (IANA: America/Denver).
- What time zone does JST refer to?
- JST refers to Japan Standard Time (IANA: Asia/Tokyo).
- Is MST on this page the same as other zones that share the letters "MST"?
- On Clockjumper, MST means Mountain Standard Time (US). Disambiguation: Phoenix observes MST year-round (no DST)