The Gregorian calendar was adopted on 1 January 1896 , with Korean era name `` Geonyang ( 건양 / 建陽 , `` adopting solar calendar '' ) . ''
The Gregorian calendar began to be used on 1 January 1896 , with Korean era name `` Geonyang ( 건양 / 建陽 , `` adopting solar calendar '' ) . ''