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Asia/Seoul

Asia/Seoul is the IANA time zone for South Korea.

UTC+09:00

Tue, Sep 29 UTC+9 KST

Offsets and daylight saving time

Standard offset
UTC+09:00
Rule
No daylight saving time: UTC+9 all year.

No clock changes are scheduled in the next three years.

Names

Generic name
Korean Standard Time
Abbreviation
KST
Long name
Korean Standard Time
Aliases
ROK (old ids that resolve to Asia/Seoul)

Use it in code

// JavaScript
new Intl.DateTimeFormat('en-US', { timeZone: 'Asia/Seoul' })

# Python
from zoneinfo import ZoneInfo
ZoneInfo('Asia/Seoul')

-- PostgreSQL
SELECT now() AT TIME ZONE 'Asia/Seoul';

Cities in Asia/Seoul

Also in this zone: Seongnam-si, Cheongju-si, Bucheon-si, Cheonan, Hwaseong-si, Jeonju, Ansan-si, Anyang-si.

Offset history since 1970

  • 1970–1986: UTC+9
  • 1987–1988: UTC+9 and UTC+10 each year
  • 1989–2026: UTC+9

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