Seoul Time Zone Converter

Time Zone Converter for Seoul

Seoul keeps KST, UTC+9 in November 2026. South Korea uses Korea Standard Time (KST, UTC+9) all year. It has not used daylight saving time since the 1988 Seoul Olympics and shares its clock with Tokyo.

Facts that change the answer

• Time zone: Asia/Seoul (KST, UTC+9 in November 2026)
• Daylight saving: none; the offset stays the same all year
• Solar noon on 10 November 2026: 12:16 PM local clock time (longitude 126.98°)
• 9:00 AM on Tuesday 10 November 2026 in Seoul = 7:00 PM the previous day in New York, 12:00 AM in London, 5:30 AM in Mumbai, 11:00 AM in Sydney
• Same 9:00 AM on 13 July 2027: 8:00 PM New York, 1:00 AM London, 5:30 AM Mumbai, 10:00 AM Sydney

Worked example for Seoul

If both offices work 9:00 AM to 5:00 PM, Seoul and London share no overlap at all on 10 November 2026, when Seoul is 9 hours ahead of London. On 13 July 2027 Seoul is 8 hours ahead of London, so the shared window becomes no overlap at all.

On 21 December 2026 the sun rises in Seoul at about 7:42 AM and sets at 5:16 PM (9 h 33 min of daylight). On 21 June 2027 it rises at 5:10 AM and sets at 7:56 PM (14 h 45 min). Because Seoul lies about 32 minutes west of the meridian its clock is based on, solar noon falls after 12:00 by that much, before the equation of time is added.

Nearby, Yantai (488 km away, China) is on CST, UTC+8; Dalian (493 km away, China) is on CST, UTC+8; Shenyang (559 km away, China) is on CST, UTC+8 (straight-line, GeoNames). Coordinates of Seoul: 37.57°, 126.98°, elevation 38 m.

Sources: IANA time zone database · GeoNames. Checked 5 November 2026. For how the maths works, see the Time Zone Converter guide.