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National Foundation Day

Guide to the date, history, cultural origins and celebration traditions of National Foundation Day in South Korea.

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History & Origins of National Foundation Day

National Foundation Day (Gaecheonjeol, meaning 'the day heaven opened') in South Korea, celebrated on October 3rd, commemorates the legendary founding of Gojoseon, the first Korean kingdom, in 2333 BCE by Dangun, the mythical god-king born of a heavenly prince and a bear-turned-woman.

How It Is Observed & Celebrated

A highly historic holiday celebrated with traditional ceremonies at Mount Manisan, where Dangun is said to have offered sacrifices, colorful street parades, and cultural festivals showcasing ancient Korean folklore.

Quick Facts Card

Country: South Korea
Holiday Name: National Foundation Day
Date (2026): October 05
Day (2026): Monday
Observance Type: Statutory
Observed In: National (South Korea)
Back to South Korea Holidays

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Date Reference Matrix (3-Year Range)

Year Calendar Date Day of the Week Status
2025 October 03, 2025 Friday Official Statutory Day Off
2026 October 05, 2026 Current Year Monday Official Statutory Day Off
2027 October 04, 2027 Monday Official Statutory Day Off