Kosŏng-ni in numbers
- Coordinates
- 33.4564, 126.4150
- Region
- Jeju-do
- Country
- South Korea, Asia
- Capital
- Seoul — 460 km away
- Same name
- 19 more places in the world share this name
The reading below is the local time in Kosŏng-ni, Jeju-do, South Korea, taken from the Asia/Seoul zone (+9).
Kosŏng-ni, South Korea
Wednesday, 4 November 2026
UTC+9 · Asia/Seoul
Local time in Kosŏng-ni
UTC+9 · no daylight saving time
Local time in Kosŏng-ni, Jeju-do.
Sunrise 6:56 AM Solar noon 12:19 PM Sunset 5:42 PM Daylight 10 h 46 min Night 13 h 14 min Civil twilight 6:30 AM – 6:08 PM
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Weather data by Open-Meteo, updated every 30 minutes.
Postal codes come from the free GeoNames dataset. Where a code is listed with a distance, it belongs to a nearby settlement — GeoNames spells that name differently from ours.
Near Kosŏng-ni you can add Jungmun and Chungmun-Dong, both on the same time.
Kosŏng-ni works with 12 postal codes.
The clock in Kosŏng-ni is set to Asia/Seoul, offset UTC+9. Daylight saving time in use: No.
Sunrise reaches Kosŏng-ni at 6:56 AM, and the sun sets at 5:42 PM. Light lasts 10 h 46 min.