What is UTC in KST?
Korea Standard Time is 9 hours ahead
Coordinated Universal Time is on UTC+0:00 and Korea Standard Time is on UTC+9:00 right now. That gap holds all year, because both zones change their clocks together.
- Time in the prime meridian
- 2:56 am
- Time in Seoul
- 11:56 am
- Difference
- +9 h
- Next clock change
- Neither zone
Convert a time
KST — Korea Standard Time
11:00 am
Wed
Daylight saving
Coordinated Universal Time
Coordinated Universal Time stays on UTC all year, so its offset from UTC never moves.
Korea Standard Time
Korea Standard Time stays on KST all year, so its offset from UTC never moves.
UTC to KST conversion table
Every hour of Wednesday, September 23, 2026, converted from Coordinated Universal Time to Korea Standard Time. 9 of the 24 hours fall on a different calendar day in Seoul, which is marked.
- 12:00 am UTC
- 9:00 am KST
- 1:00 am UTC
- 10:00 am KST
- 2:00 am UTC
- 11:00 am KST
- 3:00 am UTC
- 12:00 pm KST
- 4:00 am UTC
- 1:00 pm KST
- 5:00 am UTC
- 2:00 pm KST
- 6:00 am UTC
- 3:00 pm KST
- 7:00 am UTC
- 4:00 pm KST
- 8:00 am UTC
- 5:00 pm KST
- 9:00 am UTC
- 6:00 pm KST
- 10:00 am UTC
- 7:00 pm KST
- 11:00 am UTC
- 8:00 pm KST
- 12:00 pm UTC
- 9:00 pm KST
- 1:00 pm UTC
- 10:00 pm KST
- 2:00 pm UTC
- 11:00 pm KST
- 3:00 pm UTC
- 12:00 am KST+1 day
- 4:00 pm UTC
- 1:00 am KST+1 day
- 5:00 pm UTC
- 2:00 am KST+1 day
- 6:00 pm UTC
- 3:00 am KST+1 day
- 7:00 pm UTC
- 4:00 am KST+1 day
- 8:00 pm UTC
- 5:00 am KST+1 day
- 9:00 pm UTC
- 6:00 am KST+1 day
- 10:00 pm UTC
- 7:00 am KST+1 day
- 11:00 pm UTC
- 8:00 am KST+1 day
Scheduling between the two
There is no overlap between a nine-to-six working day in the prime meridian and one in Seoul — the gap is too wide. A call has to sit early or late for one side. Early morning in the prime meridian is the usual compromise, since that is late afternoon or evening in Seoul.
Coordinated Universal Time (UTC) is used in aviation, computing, and science worldwide. UTC never changes for daylight saving.