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JST to MST converter

MST is 16 hours behind of JST today. JST (Japan Standard Time) - currently UTC+9; MST (Mountain Standard Time) - currently UTC−7.

1 hour of the workday overlap: 9 AM-10 AM JST is 5 PM-6 PM MST. Quick answers: 9 AM JST = 5 PM MST (previous day), 12 PM JST = 8 PM MST (previous day), 5 PM JST = 1 AM MST.

JST · Japan Standard Time

UTC+9

MST · Mountain Standard Time

UTC−7

Convert a time

MST
--:--

Working hours side by side

columns: JST hours
PING · 09–18 local MAYBE · 07–09, 18–21 NOT NOW · 21–07Outlined: everyone can be pinged

JST to MST conversion table

JSTMSTVerdict in MST
12 AM · 00:008 AM · 08:00 (previous day)MAYBE
1 AM · 01:009 AM · 09:00 (previous day)PING
2 AM · 02:0010 AM · 10:00 (previous day)PING
3 AM · 03:0011 AM · 11:00 (previous day)PING
4 AM · 04:0012 PM · 12:00 (previous day)PING
5 AM · 05:001 PM · 13:00 (previous day)PING
6 AM · 06:002 PM · 14:00 (previous day)PING
7 AM · 07:003 PM · 15:00 (previous day)PING
8 AM · 08:004 PM · 16:00 (previous day)PING
9 AM · 09:005 PM · 17:00 (previous day)PING
10 AM · 10:006 PM · 18:00 (previous day)MAYBE
11 AM · 11:007 PM · 19:00 (previous day)MAYBE
12 PM · 12:008 PM · 20:00 (previous day)MAYBE
1 PM · 13:009 PM · 21:00 (previous day)NOT NOW
2 PM · 14:0010 PM · 22:00 (previous day)NOT NOW
3 PM · 15:0011 PM · 23:00 (previous day)NOT NOW
4 PM · 16:0012 AM · 00:00NOT NOW
5 PM · 17:001 AM · 01:00NOT NOW
6 PM · 18:002 AM · 02:00NOT NOW
7 PM · 19:003 AM · 03:00NOT NOW
8 PM · 20:004 AM · 04:00NOT NOW
9 PM · 21:005 AM · 05:00NOT NOW
10 PM · 22:006 AM · 06:00NOT NOW
11 PM · 23:007 AM · 07:00MAYBE

Cities on JST

Asia/Tokyo
TokyoYokohamaOsakaNagoyaSapporoFukuoka

Cities on MST

America/Denver
DenverEl PasoAlbuquerqueColorado SpringsSalt Lake CitySanta Fe

Other conversions

All converters
MST → JSTJST → ESTJST → EDTJST → PSTJST → PDTJST → CSTJST → CDTJST → GMTJST → UTCJST → BSTJST → CET

Questions

What is the time difference between JST and MST?

MST (Mountain Standard Time) is 16 hours behind of JST (Japan Standard Time) right now: UTC+9 versus UTC−7.

What is 9 AM JST in MST?

9:00 AM JST is 5 PM MST (previous day).

What is 5 PM JST in MST?

5:00 PM JST is 1 AM MST.

Does daylight saving change the JST–MST difference?

JST has no daylight saving; it stays UTC+9 all year. Denver switches between MST and MDT; next change Sunday, 14 March 2027 (UTC−7 → UTC−6).