MST to KST — Time Zone Converter
Mountain Time (MST, UTC−7) covers the US Mountain states; Korea Standard Time (KST, UTC+9) covers South Korea. In standard time, KST is 16 hours ahead of MST. Standard working days in the US Mountain states and South Korea barely overlap, so most teams alternate who takes the early-morning or late-evening slot. Use the live converter below — it applies today's IANA time zone data, including daylight saving time, and gives you a meeting schedule you can paste straight into email or Slack.
MST to KST, hour by hour (today)
Frequently asked questions
What is the time difference between MST and KST?+
Mountain Time (MST) is UTC−7 and Korea Standard Time (KST) is UTC+9, so in standard time KST is 16 hours ahead of MST. The gap shifts by an hour around daylight saving transitions, so always check a live converter near the change dates in spring and autumn.
Does MST or KST observe daylight saving time?+
Mountain Time observes daylight saving time (MST in winter, MDT in summer). Korea Standard Time stays on UTC+9 all year — no daylight saving time.
What is the best time for a meeting between MST and KST?+
Standard working days in the US Mountain states and South Korea barely overlap, so most teams alternate who takes the early-morning or late-evening slot. The converter above highlights office hours in green for both zones, so you can slide to a time that works for everyone.
How do I share a MST to KST meeting time by email?+
Pick a time in the converter, log it to the Smart Clipboard, and copy it as bullets, a formatted table, or a one-line question — with both MST and KST times spelled out so nobody has to do the math.