UTC to KST
Korea Standard Time is 9 hours ahead of Coordinated Universal Time, all year round.
UTC to KST conversion table
Every hour of the day, Coordinated Universal Time to Korea Standard Time. The gap never changes, so this table holds on every date.
| UTC | KST |
|---|---|
| 12:00 AM | 9:00 AM |
| 1:00 AM | 10:00 AM |
| 2:00 AM | 11:00 AM |
| 3:00 AM | 12:00 PM |
| 4:00 AM | 1:00 PM |
| 5:00 AM | 2:00 PM |
| 6:00 AM | 3:00 PM |
| 7:00 AM | 4:00 PM |
| 8:00 AM | 5:00 PM |
| 9:00 AM | 6:00 PM |
| 10:00 AM | 7:00 PM |
| 11:00 AM | 8:00 PM |
| UTC | KST |
|---|---|
| 12:00 PM | 9:00 PM |
| 1:00 PM | 10:00 PM |
| 2:00 PM | 11:00 PM |
| 3:00 PM | 12:00 AM +1 day |
| 4:00 PM | 1:00 AM +1 day |
| 5:00 PM | 2:00 AM +1 day |
| 6:00 PM | 3:00 AM +1 day |
| 7:00 PM | 4:00 AM +1 day |
| 8:00 PM | 5:00 AM +1 day |
| 9:00 PM | 6:00 AM +1 day |
| 10:00 PM | 7:00 AM +1 day |
| 11:00 PM | 8:00 AM +1 day |
Shared working hours
They do not overlap at all. A 09:00–17:00 working day in Coordinated Universal Time ends 1 hour before the Korea Standard Time one begins, so any live call sits outside somebody's working hours.
The shortest reach is the edges: early morning in UTC against late evening in KST, or the other way round.
When the difference changes
It doesn't. Korea Standard Time is 9 hours ahead of Coordinated Universal Time on every date of the year. Coordinated Universal Time runs at UTC+00:00; Korea Standard Time runs at UTC+09:00.
About Coordinated Universal Time
UTC never shifts. It is the reference every other zone is defined against, which is why logs, flight schedules and protocol timestamps use it. GMT is the same clock for every civil purpose, so a query for one is answered by the other.
Cities on this clock: Reykjavik, Accra, Abidjan, Dakar.
Watch out: GMT is also used loosely to mean "UK time", and those are not the same thing for seven months of the year — the United Kingdom moves to BST (UTC+1) while UTC stays put.
About Korea Standard Time
Korea is a fixed UTC+9, the same clock as Japan. Daylight saving was last used for the 1988 Olympics and has not returned.
Cities on this clock: Tokyo, Osaka, Seoul.
How the difference is worked out
Neither Coordinated Universal Time nor Korea Standard Time moves its clock relative to the other, so korea standard time is 9 hours ahead of coordinated universal time is a rule rather than a fact about one particular year. The hour-by-hour table above holds on every date.
With both zones on their own standard time — daylight saving not in force anywhere — Korea Standard Time is 9 hours ahead of Coordinated Universal Time. That figure never changes; everything else on this page follows from it plus whichever clocks have moved.
Every figure here comes from the IANA time zone database via your browser's own Intl engine, using the zone ids UTC and Asia/Seoul. Nothing is looked up on a server and nothing about your visit is recorded.
Is KST ahead of or behind UTC?
Korea Standard Time is 9 hours ahead of Coordinated Universal Time, all year round. Coordinated Universal Time runs at UTC+00:00; Korea Standard Time runs at UTC+09:00. Because neither zone changes its clock, the gap never moves.
What time is 9 AM UTC in KST?
9:00 AM UTC is 6:00 PM KST.
When can Coordinated Universal Time and Korea Standard Time meet?
They do not overlap. A 09:00–17:00 working day in Coordinated Universal Time ends 1 hour before the Korea Standard Time one begins, so a call has to sit outside someone's working hours — early morning in Coordinated Universal Time or late evening in Korea Standard Time is usually the shortest reach.
What does UTC stand for?
UTC is Coordinated Universal Time, also written GMT, Greenwich Mean Time, Zulu time. GMT is also used loosely to mean "UK time", and those are not the same thing for seven months of the year — the United Kingdom moves to BST (UTC+1) while UTC stays put.