Clockjumper

Timezone conversion

KST to MST Time — Convert Korea Standard Time to Mountain Standard Time (US)

MST is currently 15 hours behind KST. The gap shifts across the year: around January MST is 16 hours behind KST, and around July it is 15 hours behind KST, because one or both zones observe daylight saving.

MST is currently 15 hours behind KST.

KST • KST (UTC+9)
11:32 PM
Thursday, Sep 10
MST • MDT (UTC-6)
8:32 AM
Thursday, Sep 10

Abbreviation disambiguation

MST is Mountain Standard Time (UTC−7). Most of the US Mountain zone switches to MDT (UTC−6) in summer, but Arizona (except the Navajo Nation) stays on MST year-round.

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Full KST to MST conversion table

KSTMST
12:00 AM9:00 AM(previous day)
1:00 AM10:00 AM(previous day)
2:00 AM11:00 AM(previous day)
3:00 AM12:00 PM(previous day)
4:00 AM1:00 PM(previous day)
5:00 AM2:00 PM(previous day)
6:00 AM3:00 PM(previous day)
7:00 AM4:00 PM(previous day)
8:00 AM5:00 PM(previous day)
9:00 AM6:00 PM(previous day)
10:00 AM7:00 PM(previous day)
11:00 AM8:00 PM(previous day)
12:00 PM9:00 PM(previous day)
1:00 PM10:00 PM(previous day)
2:00 PM11:00 PM(previous day)
3:00 PM12:00 AM
4:00 PM1:00 AM
5:00 PM2:00 AM
6:00 PM3:00 AM
7:00 PM4:00 AM
8:00 PM5:00 AM
9:00 PM6:00 AM
10:00 PM7:00 AM
11:00 PM8:00 AM

Daylight saving and how the gap changes

Around January MST is 16 hours behind KST. Around July it is 15 hours behind KST. 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 MST ahead of or behind KST right now?
MST is currently 15 hours behind KST.
What is the current KST to MST time difference?
Right now the gap is 15 hours — MST is 15 hours behind KST.
Does the KST → MST offset change during the year?
Yes. Around January MST is 16 hours behind KST; around July it is 15 hours behind KST. The converter above always reflects the correct offset for the date you pick.
Does KST observe daylight saving time?
No — Korea Standard Time stays at a fixed UTC offset year-round.
Does MST observe daylight saving time?
MST is itself the standard-time form. Mountain Standard Time (US) is in force at UTC-7 through the winter months; outside that window the same zone is on MDT (UTC-6).
What time is 3 AM KST in MST?
3:00 AM KST is 12:00 PM (previous day) MST.
What time is 8 AM KST in MST?
8:00 AM KST is 5:00 PM (previous day) MST.
What time is 9 AM KST in MST?
9:00 AM KST is 6:00 PM (previous day) MST.
What time is 10 AM KST in MST?
10:00 AM KST is 7:00 PM (previous day) MST.
What time is 11 AM KST in MST?
11:00 AM KST is 8:00 PM (previous day) MST.
What time is 12 PM (noon) KST in MST?
12:00 PM KST is 9:00 PM (previous day) MST.
What time is 2 PM KST in MST?
2:00 PM KST is 11:00 PM (previous day) MST.
What time is 3 PM KST in MST?
3:00 PM KST is 12:00 AM MST.
What time is 4 PM KST in MST?
4:00 PM KST is 1:00 AM MST.
What time is 5 PM KST in MST?
5:00 PM KST is 2:00 AM MST.
What time is 9 PM KST in MST?
9:00 PM KST is 6:00 AM MST.
What time is 10 PM KST in MST?
10:00 PM KST is 7:00 AM MST.
When is the best time to schedule a call between KST and MST?
KST and MST 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 KST refer to?
KST refers to Korea Standard Time (IANA: Asia/Seoul).
What time zone does MST refer to?
MST refers to Mountain Standard Time (US) (IANA: America/Denver).
Is MST on this page the same as other zones that share the letters "MST"?
MST is Mountain Standard Time (UTC−7). Most of the US Mountain zone switches to MDT (UTC−6) in summer, but Arizona (except the Navajo Nation) stays on MST year-round.

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