Time in Seoul, South Korea

Time zone: KST (UTC/GMT +09:00) — Asia/Seoul

If you need the offset: Seoul is on KST, 9 hours ahead of UTC, i.e. UTC+09:00. The matching IANA zone is Asia/Seoul.

Daylight saving is not observed here, so UTC+09:00 is year-round. Any seasonal drift you notice against another city comes from that city, not from Seoul.

Current gap between Seoul and cities people most often need to coordinate with. These figures already account for daylight saving where it applies.

Overlap of a normal working day, shown in Seoul time — outside these windows one side is off the clock.

No shared working window exists with New York, Los Angeles, London or Sao Paulo, so those calls have to sit outside somebody's normal hours.

These South Korea cities also use Asia/Seoul, so their clocks read identically to Seoul at every moment of the year.

Goyang-si Seongnam-si Changwon Bucheon-si Cheongju-si Ansan-si Cheonan Jeonju