From 1945 until 1961 in South Korea , Gregorian calendar years were counted from the foundation of Gojoseon in 2333 BC ( regarded as year one ) , the date of the legendary founding of Korea by Dangun , hence these Dangi ( 단기 / 檀紀 ) years were 4278 to 4294 .
From 1945 to 1961 in South Korea , Gregorian calendar years were counted from the start of Gojoseon in 2333 BC ( regarded as year one ) . These Dangi ( 단기 / 檀紀 ) years were 4278 to 4294 .