Gae-Cheon-Jeol(開天節)

Gae-cheon-jeol (Korean: 개천절) is a national holiday in South Korea on 3 October.

It means “Festival of the Opening of Heaven”

this holiday celebrates the creation of the state of Gojoseon (ancient Korea) founded by ‘Dangun Wanggeom’ in the year 2333 BC.