Heure Actuelle à Seosan, Corée du Sud — KST.

Seosan is a city in South Chungcheong Province, South Korea, with a population of roughly 175,000 according to the 2017 census. Located at the northwestern end of South Chungcheong Province, it is bounded by Dangjin, Naepo New Town, Yesan-gun and Hongseong-gun on the east, Taean-gun and the Yellow Sea on the west, 125 km (78 mi) south of Seoul, 159 km (99 mi) northwest of Daejeon and 34 km (21 mi) northwest of Naepo New Town. Seosan is the hub of transportation on the west coast where the Seohaean Expressway, Daejeon-Dangjin Expressway, and National Highways No. 29, 32, 38, and 45 intersect.

Distance-wise, Seosan is closest to Tokyo (~1,189 km), Singapore (~4,574 km), Dubai (~6,754 km); São Paulo is the far end at roughly 18,402 km. That ordering matters more than the timezone label for travel planning.

Seosan sits inside Corée du Sud — the Eastern Asia subregion, capital Seoul, languages Korean, currency KRW (₩).

Around Seosan, the nearest mapped reference cities are Tangjin (20 km), Taesal-li (21 km), Hongseong (28 km), Yesan (37 km); treat them as the de-facto regional cluster for KST planning.

Upcoming country holiday signals around Seosan: Children's Day, Buddha's Birthday, Memorial Day. Bake those into launch, on-call, and travel windows for Corée du Sud.

Closest curated airport references from Seosan: ICN Seoul (76 km), GMP Seoul (91 km), CJJ Cheongju (94 km).