KST — Korea Standard Time
See KST time details, where it is used, and compare Korea Standard Time with other time zones worldwide.
Meaning and Countries Using KST
KST stands for Korea Standard Time and uses a fixed UTC+9 offset. It is observed in North Korea and South Korea year-round.
No Daylight Saving Changes
KST does not use daylight saving time, so the offset stays at UTC+9 throughout the year. The page tracks timezone rules and historical updates automatically.
Compare and Convert KST
Use the visual time grid and hour-by-hour comparison tables to convert KST to other zones. Export meeting times with ICS download or send to Google Calendar and Gmail.
How to Convert KST to Other Time Zones
Open the KST page: Visit
https://www.xconvert.com/time-converter/kst-time-zoneto load a visual comparison grid with Korea Standard Time already in place. This is useful when you need to line up working hours in Seoul, Busan, or Pyongyang with teams, clients, or suppliers in other parts of the world without manually counting hours from UTC+9.Add comparison cities: Click + Add City and search for the cities you want to compare against KST. A practical setup is to add cities tied to Korean business, shipping, manufacturing, or tech coordination while keeping KST cities such as Seoul, Incheon, Busan, or Daegu visible so you can compare schedules across the same UTC+9 baseline.
Select a time range on the grid: Click Select to enter selection mode, then drag across the colored timeline on the KST row to highlight the hours you want to compare. You can drag the center of the purple selection to move it or use the left and right handles to resize it, which is especially helpful when you are testing whether a Seoul office-hour meeting window also works for contacts in other regions.
Export and share the result: Once a time range is selected, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. This makes it easy to send a confirmed meeting window to a remote team, attach it to a client email, or create a calendar event that preserves the KST-based schedule for everyone involved.
About Korea Standard Time (KST)
KST stands for Korea Standard Time, the standard time used in both North Korea and South Korea. It operates at UTC+9, which means local time in KST is nine hours ahead of Coordinated Universal Time.
Korea Standard Time is used across major cities including Pyongyang, Hamhŭng, Namp’o, Sunch’ŏn, Hŭngnam, Seoul, Busan, Incheon, Daegu, and Daejeon. For travelers, logistics planners, and distributed teams, this means the same clock standard applies across these key urban centers, making domestic scheduling within the KST zone straightforward.
KST does not observe DST and has no counterpart. That matters for recurring meetings and operations planning because the time standard remains fixed at UTC+9 year-round rather than shifting seasonally between standard time and daylight time.
Other abbreviations that share the same UTC+9 offset include AWDT, CHOST, I, IRKST, JST, PWT, TLT, ULAST, WIT, and YAKT. Even when the offset matches, users should still compare city rows carefully in the tool because business calendars, working hours, and regional naming conventions can differ.
KST and Daylight Saving Time
Korea Standard Time does not observe Daylight Saving Time. There is no seasonal switch, no alternate daylight version of KST, and no annual clock change to track.
Because KST stays fixed at UTC+9 throughout the year, there are no DST transition dates to plan around. This is especially useful for recurring calls with contacts in Seoul, Busan, Incheon, Daegu, Daejeon, or Pyongyang, since the KST side of the schedule remains stable every month.
For international coordination, the practical impact is that any seasonal change comes from the other time zone, not from KST itself. If you are scheduling cross-border meetings, the KST row in the comparison grid stays constant while other regions may shift around it.
Frequently Asked Questions
What does KST stand for?
KST stands for Korea Standard Time. It is the standard time designation used for locations in both North Korea and South Korea, including major cities such as Seoul and Pyongyang.
Is KST the same as GMT?
KST is not the same as GMT. KST is UTC+9, so it is nine hours ahead of Coordinated Universal Time rather than matching the zero-offset time standard commonly associated with GMT.
Which cities use KST?
Cities using KST include Pyongyang, Hamhŭng, Namp’o, Sunch’ŏn, Hŭngnam, Seoul, Busan, Incheon, Daegu, and Daejeon. These cities span both North Korea and South Korea, so KST is the common time standard across major population and administrative centers on the Korean Peninsula.
What is the UTC offset for KST?
The UTC offset for KST is UTC+9. In practical terms, that means Korea Standard Time is always nine hours ahead of UTC, which makes it easier to anchor international scheduling when you need a fixed reference point.
When does KST change?
KST does not change seasonally. It does not observe DST and has no counterpart, so there are no spring or autumn clock changes and no exact yearly switch dates to remember.
Does KST have a daylight saving version?
No, KST has no daylight saving counterpart. The time zone remains Korea Standard Time at UTC+9 throughout the entire year, which simplifies recurring scheduling for business, travel, and operations.
Which countries use Korea Standard Time?
North Korea and South Korea use Korea Standard Time. This shared use of UTC+9 means major cities such as Pyongyang, Seoul, Busan, and Incheon follow the same standard clock time.
Are there other time zone abbreviations with the same offset as KST?
Yes. Abbreviations with the same UTC+9 offset include AWDT, CHOST, I, IRKST, JST, PWT, TLT, ULAST, WIT, and YAKT. Matching offsets can be useful for rough comparison, but the time converter grid is still the best way to visualize schedules across named cities and regions.