GMT to KST converter
KST is 9 hours ahead of GMT right now. Live clocks on both sides, a direct time input, the full 24-hour table with a permalink per hour, and the real daylight-saving state — computed from the IANA tz database on every request, never from a stored offset.
Convert an exact time type it — no sliders
Conversion runs in your browser against the same IANA rules the server uses, so it keeps working offline and nothing you type is sent anywhere.
Daylight saving right now
Korea Standard Time
Asia/Seoul is currently on KST (UTC+09:00).
no clock change scheduled — this zone is fixed at UTC+09:00
Korea Standard Time is UTC+9 year-round, identical in offset to JST.
Greenwich Mean Time
Etc/GMT is on GMT (UTC+00:00).
no clock change scheduled — fixed at UTC+00:00
GMT is UTC+0 and never shifts. The UK observes GMT in winter only — in summer it is on BST (UTC+1), so "GMT" on a British invite dated in July usually means BST.
Best time to call green = 09:00–18:00 on both sides
No overlap inside a 09:00–18:00 day on both sides. Someone has to take an early or late slot — the table below shows exactly which hours are least bad.
GMT to KST, hour by hour 13 August 2026 · every row is a permalink
| GMT | KST | 12-hour | Day | Permalink |
|---|---|---|---|---|
| 00:00 | 09:00 KST | 9:00 AM | same day | 00:00 → |
| 01:00 | 10:00 KST | 10:00 AM | same day | 01:00 → |
| 02:00 | 11:00 KST | 11:00 AM | same day | 02:00 → |
| 03:00 | 12:00 KST | 12:00 PM | same day | 03:00 → |
| 04:00 | 13:00 KST | 1:00 PM | same day | 04:00 → |
| 05:00 | 14:00 KST | 2:00 PM | same day | 05:00 → |
| 06:00 | 15:00 KST | 3:00 PM | same day | 06:00 → |
| 07:00 | 16:00 KST | 4:00 PM | same day | 07:00 → |
| 08:00 | 17:00 KST | 5:00 PM | same day | 08:00 → |
| 09:00 | 18:00 KST | 6:00 PM | same day | 09:00 → |
| 10:00 | 19:00 KST | 7:00 PM | same day | 10:00 → |
| 11:00 | 20:00 KST | 8:00 PM | same day | 11:00 → |
| 12:00 | 21:00 KST | 9:00 PM | same day | 12:00 → |
| 13:00 | 22:00 KST | 10:00 PM | same day | 13:00 → |
| 14:00 | 23:00 KST | 11:00 PM | same day | 14:00 → |
| 15:00 | 00:00 KST | 12:00 AM | next day | 15:00 → |
| 16:00 | 01:00 KST | 1:00 AM | next day | 16:00 → |
| 17:00 | 02:00 KST | 2:00 AM | next day | 17:00 → |
| 18:00 | 03:00 KST | 3:00 AM | next day | 18:00 → |
| 19:00 | 04:00 KST | 4:00 AM | next day | 19:00 → |
| 20:00 | 05:00 KST | 5:00 AM | next day | 20:00 → |
| 21:00 | 06:00 KST | 6:00 AM | next day | 21:00 → |
| 22:00 | 07:00 KST | 7:00 AM | next day | 22:00 → |
| 23:00 | 08:00 KST | 8:00 AM | next day | 23:00 → |