[1][2] Gaecheonjeol is also recognized in North Korea, although not as a public holiday, with an annual ceremony at the Mausoleum of Tangun, the founder of Gojoseon.

[3] The harvest ceremony was celebrated in the Korean realms; Yeonggo (영고; 迎鼓) of Buyeo; Mucheon (무천; 舞天) of Yemaek; Gyeeum (계음; 契飮) of Mahan and Byeonhan; Dongmaeng (동맹; 東盟) of Goguryeo; and Palgwanhoe (팔관회; 八關會) of Silla.

Events like this contributed to fostering the spirit of the Korean people under the pressure of Japanese colonial rule.

This is based on the universal perception of history, which saw Dangun as the founder of the Hankyoreh at the time and Gojoseon as the first nation of the Korean people.

On 1 October 1949, the "Act on National Day of celebration" was enacted and the date of the third lunar month was designated as the Gaecheonjeol.

On the other hand, Daejongism believes that the original meaning of the word "Gaecheon" is not Dangun's founding day, but the third day of the lunar month of October 2457 BC, when Hwanung opened the sky gate and came down below Sin Dansu, Taebaek Mountain, and began the great work of Hongikingan (弘益人間, translated as 'to widely benefit the humans') and Yihwasegye (理化世界, translated as 'ruling the word with reason').

Section 2 백두산 높은 터에 부자요 부부 In the high place of Mountain Paekdu a father (hwanin) gave mysterious thing to his son (hwanung).

Also known by the English name National Foundation Day, this holiday celebrates the legendary formation of the first Korean state of Gojoseon in 2333 BC.

In Seoul, it always takes place in Yeouido Han River Park, and crowds of people will gather there to watch the fireworks on that day.

This altar is said to have been built by Tangun and is a legendary place of worship and sacrifice favored by ancient kings during Korean history.