utc now / zones / utc-to-kst

UTC to KST converter

KST is 9 hours ahead of UTC 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.

Coordinated Universal Time · UTC
23:22:45
Wednesday, 12 August 2026 · UTC · UTC+00:00
⇄
Korea Standard Time · Asia/Seoul
08:22:45
Thursday, 13 August 2026 · KST · UTC+09:00

Convert an exact time type it — no sliders

08:22
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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.

Coordinated Universal Time

UTC is on UTC (UTC+00:00).

no clock change scheduled — fixed at UTC+00:00

UTC is the reference clock every other offset is quoted against. It has no daylight saving and never shifts.

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.

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UTC to KST, hour by hour 12 August 2026 · every row is a permalink

UTC 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 →

Every hour as its own page

00:00 UTC 01:00 UTC 02:00 UTC 03:00 UTC 04:00 UTC 05:00 UTC 06:00 UTC 07:00 UTC 08:00 UTC 09:00 UTC 10:00 UTC 11:00 UTC 12:00 UTC 13:00 UTC 14:00 UTC 15:00 UTC 16:00 UTC 17:00 UTC 18:00 UTC 19:00 UTC 20:00 UTC 21:00 UTC 22:00 UTC 23:00 UTC

UTC to KST — questions

What time is it in KST when it is UTC now?
KST is currently 08:22 on Thursday, 13 August 2026 (KST, UTC+09:00), while UTC is 23:22 (UTC+00:00). That is 9 hours ahead of the source clock right now.
How many hours ahead is KST of UTC?
9 hours at this moment. The gap is not constant across the year: Coordinated Universal Time and Korea Standard Time change clocks on different dates (or one of them not at all), so a difference you hard-code in summer can be an hour wrong in winter. The table on this page is computed from the current tzdata rules, not from a fixed offset.
Is KST on daylight saving time right now?
No. Asia/Seoul is on KST (UTC+09:00) at the moment.
Does KST observe daylight saving time?
No. Asia/Seoul stays on UTC+09:00 all year, so the difference from UTC only moves when UTC itself changes.
Is there any working-hours overlap between UTC and KST?
Not inside a normal 09:00-18:00 day on both sides — the 9-hour gap is too wide. One party has to take an early or late slot; the hour table above shows exactly which hours land where so you can pick the least painful one.
Which IANA timezone name should I use for KST in code?
Use Asia/Seoul. Abbreviations like KST are ambiguous and not resolvable by most libraries — Python's ZoneInfo, Java's ZoneId, Go's time.LoadLocation and JavaScript's Intl all expect the IANA name. Hard-coding UTC+09:00 instead will be wrong the moment the rules change.

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