What is GMT in KST?
Korea Standard Time is 9 hours ahead
Greenwich Mean 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 Greenwich
- 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
Greenwich Mean Time
Greenwich Mean Time stays on GMT 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.
GMT to KST conversion table
Every hour of Wednesday, September 23, 2026, converted from Greenwich Mean Time to Korea Standard Time. 9 of the 24 hours fall on a different calendar day in Seoul, which is marked.
- 12:00 am GMT
- 9:00 am KST
- 1:00 am GMT
- 10:00 am KST
- 2:00 am GMT
- 11:00 am KST
- 3:00 am GMT
- 12:00 pm KST
- 4:00 am GMT
- 1:00 pm KST
- 5:00 am GMT
- 2:00 pm KST
- 6:00 am GMT
- 3:00 pm KST
- 7:00 am GMT
- 4:00 pm KST
- 8:00 am GMT
- 5:00 pm KST
- 9:00 am GMT
- 6:00 pm KST
- 10:00 am GMT
- 7:00 pm KST
- 11:00 am GMT
- 8:00 pm KST
- 12:00 pm GMT
- 9:00 pm KST
- 1:00 pm GMT
- 10:00 pm KST
- 2:00 pm GMT
- 11:00 pm KST
- 3:00 pm GMT
- 12:00 am KST+1 day
- 4:00 pm GMT
- 1:00 am KST+1 day
- 5:00 pm GMT
- 2:00 am KST+1 day
- 6:00 pm GMT
- 3:00 am KST+1 day
- 7:00 pm GMT
- 4:00 am KST+1 day
- 8:00 pm GMT
- 5:00 am KST+1 day
- 9:00 pm GMT
- 6:00 am KST+1 day
- 10:00 pm GMT
- 7:00 am KST+1 day
- 11:00 pm GMT
- 8:00 am KST+1 day
Scheduling between the two
There is no overlap between a nine-to-six working day in Greenwich and one in Seoul — the gap is too wide. A call has to sit early or late for one side. Early morning in Greenwich is the usual compromise, since that is late afternoon or evening in Seoul.
Greenwich Mean Time (GMT) is used in as a fixed UTC+0 offset. Note that the UK itself leaves GMT every summer — see British Time below.