Changes in Ecclesiastical Jurisdictions in Bhutan

Date	Change
1929.02.15	Mission sui juris of Sikkim was established (from Metropolitan Archdiocese of Calcutta and Apostolic Vicariate of Dajianlu 打箭爐 and became suffragan of Calcutta)
1931.06.16	Mission sui juris of Sikkim was promoted as Apostolic Prefecture of Sikkim
1962.08.08	Apostolic Prefecture of Sikkim was promoted as Diocese of Darjeeling (gained territory from Metropolitan Archdiocese of Calcutta)